CA2403626A1 - Hybrid stone retrieval device - Google Patents
Hybrid stone retrieval device Download PDFInfo
- Publication number
- CA2403626A1 CA2403626A1 CA002403626A CA2403626A CA2403626A1 CA 2403626 A1 CA2403626 A1 CA 2403626A1 CA 002403626 A CA002403626 A CA 002403626A CA 2403626 A CA2403626 A CA 2403626A CA 2403626 A1 CA2403626 A1 CA 2403626A1
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- Prior art keywords
- retrieval assembly
- sheath
- distal
- proximal
- retrieval
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/22—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for
- A61B17/221—Gripping devices in the form of loops or baskets for gripping calculi or similar types of obstructions
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/22—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for
- A61B17/22031—Gripping instruments, e.g. forceps, for removing or smashing calculi
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/32—Surgical cutting instruments
- A61B17/3205—Excision instruments
- A61B17/32056—Surgical snare instruments
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B2017/0046—Surgical instruments, devices or methods, e.g. tourniquets with a releasable handle; with handle and operating part separable
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/22—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for
- A61B2017/22072—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for with an instrument channel, e.g. for replacing one instrument by the other
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/22—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for
- A61B17/221—Gripping devices in the form of loops or baskets for gripping calculi or similar types of obstructions
- A61B2017/2212—Gripping devices in the form of loops or baskets for gripping calculi or similar types of obstructions having a closed distal end, e.g. a loop
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/22—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for
- A61B17/221—Gripping devices in the form of loops or baskets for gripping calculi or similar types of obstructions
- A61B2017/2215—Gripping devices in the form of loops or baskets for gripping calculi or similar types of obstructions having an open distal end
Abstract
Baskets with multiple portions and multiple deployed configurations allow the capture and release of material within the body.
Description
HYBRID STONE RETRIEVAL DEVICE
Cross-Reference to Related Applications This is a continuation-in-part of U.S. patent application serial no.
09/369,226, filed August 6, 1999, and a continuation-in-part of U.S. patent application serial no. 08/968,906, filed November 5, 1997, which is a continuation of U.S. patent application serial no. 08/822,207, filed .
March 20, 1997, abandoned, which is a continuation of U.S. patent application serial no.
08/382,778, filed February 2, 1995, abandoned. The entirety of each of the applications is incorporated by reference herein.
Technical Field This invention generally relates to medical instruments such as retrieval devices for to retrieving material from within a body. More particularly, the invention relates to retrieval devices for capturing and releasing stones such as urinary tract stones, gall stones, and other biological materials from a body tract.
Background Information Medical retrieval devices generally are used to retrieve biological and foreign material 15 including stones from the body. Such medical retrieval devices may be used through an endoscope or a laparoscope.
One type of laiown medical retrieval device has a sheath and a retrieval assembly such as a baslcet that is movable in and out of the sheath. When the basket is within the sheath, the baslcet assumes a collapsed, reduced diameter profile. When the sheath is retracted relative to the 2o basket or the basket is moved beyond the end of the sheath, the baslcet expands to a relatively larger diameter than when the basket is enclosed within the sheath. Generally, the contour of known baslcets is round or oval and is formed by a plurality of legs.
With many known retrieval devices, materials are used in the retrieval assembly to enhance its rigidity. However, rigid materials used to enhance strength do so at the expense of 25 flexibility. The retrieval assembly must, on the one hand, be sufficiently strong to dilate the body tract and, on the other hand, be sufficiently flexible to negotiate body tracts having small diameters, tortuous pathways and irregular lumens. Moreover, flexible retrieval assemblies can more easily capture large stones through the gaps in the legs of the retrieval assembly, than can rigid retrieval assemblies. When flexible materials are used in the retrieval assembly, however, rigidity and strength are compromised.
Summary of the Invention It is an object of the invention to provide a medical instrument, i.e., a medical retrieval device with features that permit retrieval of material within a body. The material can be biological material, such as stones, or foreign material, or any of a variety of other types of material within a body. The material can be located in a urinary or biliary tract or elsewhere in the body.
l0 A medical instrument according to the invention is used to treat an internal organ which includes material such as a calculus or a thromboembolus. The medical instrument typically includes a proximal handle, a sheath extending from the handle and including a lumen and a distal end away from the handle, and a retrieval assembly such as a baslcet.
The retrieval assembly has a proximal portion and a distal portion. The proximal portion is made with a first material and the distal portion is made with a second different material.
The retrieval assembly and the sheath are moveable relative to each other to achieve a collapsed position of the retrieval assembly in which the retrieval assembly is within the lumen of the sheath and another position of the retrieval assembly in which at least a portion of the retrieval assembly extends from the distal end of the sheath. In this position, the retrieval 2o assembly assumes a three-dimensional shape out of the lumen of the sheath.
In one embodiment, the retrieval assembly is a basket. The basket has a plurality of legs, for example, the basket has three, four, five or more legs. The legs may be preformed.
In one embodiment of the invention, the legs of the retrieval assembly feature a proximal and a distal portion. The proximal portion of the Legs comprises a first material and the distal portion of the legs comprises a second material, the second material being more flexible than the first material. In this embodiment, the proximal leg portion and the distal leg portion are connected at a joint. The joint is a loop, hoolc, crimp, solder, weld, or any other mechanism known for connecting the ends of at least two wires or legs.
In another embodiment of the medical retrieval device of the invention, the proximal 3o portion of the retrieval assembly is generally straight; the contour of the proximal portion being planar rather than curved. Alternatively, at least the proximal portion of tile retrieval assembly is bulbous, i.e., the proximal portion is bowed out from the center of the retrieval device when the proximal portion is deployed beyond the distal end of the sheath.
Other embodiments of this invention include a sheath axially moveable relative to the retrieval assembly. In this embodiment, retraction of the sheath in a direction away from the distal end of the sheath extends the retrieval assembly from the distal end of the sheath. The portions of the retrieval assembly are thereby expanded depending on which portions are uncovered by the retracted sheath.
Some additional embodiments of the invention include an elongated guide member longitudinally positioned in the lumen of the sheath, operably attached to a proximal end of the to retrieval assembly, and actuated by at least one actuating member on the handle. Reciprocal axial movement of the elongated guide member moves the retrieval assembly from its enclosed position within the sheath, in and out of the distal end of the sheath and back to its enclosed position within the sheath. As the assembly is moved in and out the sheath, the portions of the retrieval assembly shift between collapsed and opened positions.
In yet another aspect, the invention relates to a method for retrieving material from a body. The method comprises inserting a medical retrieval device with a retrieval assembly (such as the instrument described above) into a body, extending the proximal and distal portions of the retrieval assembly beyond the end of the sheath, maneuvering the retrieval assembly around the material, capturing the material within the retrieval assembly, withdrawing the proximal and 2o distal portions of the retrieval assembly back into the sheath, and removing the medical instrument and the material captured in the retrieval assembly from the body.
Brief Description of the Drawings In the drawings, like reference characters generally refer to the same parts throughout the different views. Also the drawings are not necessarily to scale, emphasis instead generally being placed upon illustrating the principles of the invention.
FIG. 1 is a plan view of an embodiment of a medical retrieval device according to the invention.
FIG. 2 illustrates an embodiment of a retrieval assembly, according to the invention, extended beyond the distal end of the sheath and open.
3o FIG. 3. illustrates the retrieval assembly illustrated in FIG. 2 with the distal portion of the retrieval assembly extended beyond the distal end of the sheath and open.
FIG. 4A illustrates the retrieval assembly illustrated in FIG. 2 collapsed within the distal portion of the sheath.
FIG. 4B illustrates an embodiment of a retrieval assembly according to the invention.
FIG. 5A illustrates a front view of an embodiment of a joint between a proximal leg portion and a distal leg portion according to the invention.
FIG. 5B illustrates a side view of the joint illustrated in FIG. 5A.
FIG. 6A illustrates a side view of an embodiment of a joint between a proximal leg portion and a distal leg portion according to the invention.
FIG. 6B illustrates a front view of the joint illustrated in FIG. 6A.
to FIG. 7A illustrates a front view of an embodiment of a joint between a proximal leg portion and a distal leg portion according to the invention.
FIG. 7B illustrates a side view of the j oint illustrated in FIG. 7A.
FIG. 8A illustrates a side view of a joint between a proximal leg portion and a distal leg portion according to the invention.
FIG. 8B illustrates a front view of the joint illustrated in FIG. 8A.
FIG. 9 illustrates an embodiment of a retrieval assembly according to the invention.
FIG. 10A illustrates an embodiment of a distal portion of a leg of a retrieval assembly according to the invention.
FIG. l OB illustrates an embodiment of a distal portion of two legs of a retrieval assembly according to the invention.
FIG. l OC illustrates an embodiment of a retrieval assembly including the legs illustrated in FIG. 1 OB.
FIG. 11 illustrates an embodiment of a retrieval assembly according to the invention.
FIG. 12A illustrates an embodiment of a retrieval assembly according to the invention with the distal portion of the retrieval assembly extended from the distal end of the sheath.
FIG. 12B illustrates the retrieval assembly in FIG. 12A with the proximal and distal portions of the retrieval assembly extended beyond the distal end of the sheath.
FIG. 13 illustrates a perspective view of another embodiment of the retrieval assembly according to the invention.
3o FIG. 14 illustrates another embodiment of a retrieval assembly according to the invention.
FIG. 15 illustrates another embodiment of a retrieval assembly according to the invention.
FIG. 16 illustrates another embodiment of a retrieval assembly according to the invention.
FIG. 17 illustrates another embodiment of a retrieval assembly according to the invention.
FIG. 18A illustrates another embodiment of a medical retrieval device according to the invention.
FIG. 18B illustrates an end view of an embodiment of the retrieval assembly illustrated in FIG. 18A.
5 FIG. 18C illustrates an end view of another embodiment of the retrieval assembly illustrated in FIG. 18A.
FIG 18D illustrates another embodiment of the retrieval assembly illustrated in FIG. 18A.
FIG 18E illustrates the retrieval assembly illustrated in FIB 18D approaching a stone.
FIG 18F illustrates the retrieval assembly illustrated in FIB 18D partially collapsed to around a stone.
FIG 18G illustrates the retrieval assembly illustrated in FIG I8D collapsed around a stone and partially collapsed within the distal end of the sheath.
FIG. 19A illustrates another embodiment of a retrieval assembly according to the invention.
FIG. 19B illustrates another embodiment of a retrieval assembly according to the invention.
FIG. 20A illustrates the retrieval assembly illustrated in FIG. 19A collapsed within the sheath.
FIG. 20B illustrates the retrieval assembly illustrated in FIG. 20A extended from the 2o distal end of the sheath and open.
FIG. 20C illustrates a stone captured in the retrieval assembly illustrated in FIG. 20B.
FIG. 21A illustrates the retrieval assembly illustrated in FIG. 19B collapsed within the sheath.
FIG. 21B illustrates the retrieval assembly illustrated in FIG. 21A extended from the distal end of the sheath and open.
FIG. 21C illustrates a stone captured in the retrieval assembly illustrated in FIG. 21B.
FIG. 22A illustrates another embodiment of the retrieval assembly illustrated in FIG.
19A.
FIG 22B illustrates another embodiment of the retrieval assembly illustrated in FIB. 19B.
Cross-Reference to Related Applications This is a continuation-in-part of U.S. patent application serial no.
09/369,226, filed August 6, 1999, and a continuation-in-part of U.S. patent application serial no. 08/968,906, filed November 5, 1997, which is a continuation of U.S. patent application serial no. 08/822,207, filed .
March 20, 1997, abandoned, which is a continuation of U.S. patent application serial no.
08/382,778, filed February 2, 1995, abandoned. The entirety of each of the applications is incorporated by reference herein.
Technical Field This invention generally relates to medical instruments such as retrieval devices for to retrieving material from within a body. More particularly, the invention relates to retrieval devices for capturing and releasing stones such as urinary tract stones, gall stones, and other biological materials from a body tract.
Background Information Medical retrieval devices generally are used to retrieve biological and foreign material 15 including stones from the body. Such medical retrieval devices may be used through an endoscope or a laparoscope.
One type of laiown medical retrieval device has a sheath and a retrieval assembly such as a baslcet that is movable in and out of the sheath. When the basket is within the sheath, the baslcet assumes a collapsed, reduced diameter profile. When the sheath is retracted relative to the 2o basket or the basket is moved beyond the end of the sheath, the baslcet expands to a relatively larger diameter than when the basket is enclosed within the sheath. Generally, the contour of known baslcets is round or oval and is formed by a plurality of legs.
With many known retrieval devices, materials are used in the retrieval assembly to enhance its rigidity. However, rigid materials used to enhance strength do so at the expense of 25 flexibility. The retrieval assembly must, on the one hand, be sufficiently strong to dilate the body tract and, on the other hand, be sufficiently flexible to negotiate body tracts having small diameters, tortuous pathways and irregular lumens. Moreover, flexible retrieval assemblies can more easily capture large stones through the gaps in the legs of the retrieval assembly, than can rigid retrieval assemblies. When flexible materials are used in the retrieval assembly, however, rigidity and strength are compromised.
Summary of the Invention It is an object of the invention to provide a medical instrument, i.e., a medical retrieval device with features that permit retrieval of material within a body. The material can be biological material, such as stones, or foreign material, or any of a variety of other types of material within a body. The material can be located in a urinary or biliary tract or elsewhere in the body.
l0 A medical instrument according to the invention is used to treat an internal organ which includes material such as a calculus or a thromboembolus. The medical instrument typically includes a proximal handle, a sheath extending from the handle and including a lumen and a distal end away from the handle, and a retrieval assembly such as a baslcet.
The retrieval assembly has a proximal portion and a distal portion. The proximal portion is made with a first material and the distal portion is made with a second different material.
The retrieval assembly and the sheath are moveable relative to each other to achieve a collapsed position of the retrieval assembly in which the retrieval assembly is within the lumen of the sheath and another position of the retrieval assembly in which at least a portion of the retrieval assembly extends from the distal end of the sheath. In this position, the retrieval 2o assembly assumes a three-dimensional shape out of the lumen of the sheath.
In one embodiment, the retrieval assembly is a basket. The basket has a plurality of legs, for example, the basket has three, four, five or more legs. The legs may be preformed.
In one embodiment of the invention, the legs of the retrieval assembly feature a proximal and a distal portion. The proximal portion of the Legs comprises a first material and the distal portion of the legs comprises a second material, the second material being more flexible than the first material. In this embodiment, the proximal leg portion and the distal leg portion are connected at a joint. The joint is a loop, hoolc, crimp, solder, weld, or any other mechanism known for connecting the ends of at least two wires or legs.
In another embodiment of the medical retrieval device of the invention, the proximal 3o portion of the retrieval assembly is generally straight; the contour of the proximal portion being planar rather than curved. Alternatively, at least the proximal portion of tile retrieval assembly is bulbous, i.e., the proximal portion is bowed out from the center of the retrieval device when the proximal portion is deployed beyond the distal end of the sheath.
Other embodiments of this invention include a sheath axially moveable relative to the retrieval assembly. In this embodiment, retraction of the sheath in a direction away from the distal end of the sheath extends the retrieval assembly from the distal end of the sheath. The portions of the retrieval assembly are thereby expanded depending on which portions are uncovered by the retracted sheath.
Some additional embodiments of the invention include an elongated guide member longitudinally positioned in the lumen of the sheath, operably attached to a proximal end of the to retrieval assembly, and actuated by at least one actuating member on the handle. Reciprocal axial movement of the elongated guide member moves the retrieval assembly from its enclosed position within the sheath, in and out of the distal end of the sheath and back to its enclosed position within the sheath. As the assembly is moved in and out the sheath, the portions of the retrieval assembly shift between collapsed and opened positions.
In yet another aspect, the invention relates to a method for retrieving material from a body. The method comprises inserting a medical retrieval device with a retrieval assembly (such as the instrument described above) into a body, extending the proximal and distal portions of the retrieval assembly beyond the end of the sheath, maneuvering the retrieval assembly around the material, capturing the material within the retrieval assembly, withdrawing the proximal and 2o distal portions of the retrieval assembly back into the sheath, and removing the medical instrument and the material captured in the retrieval assembly from the body.
Brief Description of the Drawings In the drawings, like reference characters generally refer to the same parts throughout the different views. Also the drawings are not necessarily to scale, emphasis instead generally being placed upon illustrating the principles of the invention.
FIG. 1 is a plan view of an embodiment of a medical retrieval device according to the invention.
FIG. 2 illustrates an embodiment of a retrieval assembly, according to the invention, extended beyond the distal end of the sheath and open.
3o FIG. 3. illustrates the retrieval assembly illustrated in FIG. 2 with the distal portion of the retrieval assembly extended beyond the distal end of the sheath and open.
FIG. 4A illustrates the retrieval assembly illustrated in FIG. 2 collapsed within the distal portion of the sheath.
FIG. 4B illustrates an embodiment of a retrieval assembly according to the invention.
FIG. 5A illustrates a front view of an embodiment of a joint between a proximal leg portion and a distal leg portion according to the invention.
FIG. 5B illustrates a side view of the joint illustrated in FIG. 5A.
FIG. 6A illustrates a side view of an embodiment of a joint between a proximal leg portion and a distal leg portion according to the invention.
FIG. 6B illustrates a front view of the joint illustrated in FIG. 6A.
to FIG. 7A illustrates a front view of an embodiment of a joint between a proximal leg portion and a distal leg portion according to the invention.
FIG. 7B illustrates a side view of the j oint illustrated in FIG. 7A.
FIG. 8A illustrates a side view of a joint between a proximal leg portion and a distal leg portion according to the invention.
FIG. 8B illustrates a front view of the joint illustrated in FIG. 8A.
FIG. 9 illustrates an embodiment of a retrieval assembly according to the invention.
FIG. 10A illustrates an embodiment of a distal portion of a leg of a retrieval assembly according to the invention.
FIG. l OB illustrates an embodiment of a distal portion of two legs of a retrieval assembly according to the invention.
FIG. l OC illustrates an embodiment of a retrieval assembly including the legs illustrated in FIG. 1 OB.
FIG. 11 illustrates an embodiment of a retrieval assembly according to the invention.
FIG. 12A illustrates an embodiment of a retrieval assembly according to the invention with the distal portion of the retrieval assembly extended from the distal end of the sheath.
FIG. 12B illustrates the retrieval assembly in FIG. 12A with the proximal and distal portions of the retrieval assembly extended beyond the distal end of the sheath.
FIG. 13 illustrates a perspective view of another embodiment of the retrieval assembly according to the invention.
3o FIG. 14 illustrates another embodiment of a retrieval assembly according to the invention.
FIG. 15 illustrates another embodiment of a retrieval assembly according to the invention.
FIG. 16 illustrates another embodiment of a retrieval assembly according to the invention.
FIG. 17 illustrates another embodiment of a retrieval assembly according to the invention.
FIG. 18A illustrates another embodiment of a medical retrieval device according to the invention.
FIG. 18B illustrates an end view of an embodiment of the retrieval assembly illustrated in FIG. 18A.
5 FIG. 18C illustrates an end view of another embodiment of the retrieval assembly illustrated in FIG. 18A.
FIG 18D illustrates another embodiment of the retrieval assembly illustrated in FIG. 18A.
FIG 18E illustrates the retrieval assembly illustrated in FIB 18D approaching a stone.
FIG 18F illustrates the retrieval assembly illustrated in FIB 18D partially collapsed to around a stone.
FIG 18G illustrates the retrieval assembly illustrated in FIG I8D collapsed around a stone and partially collapsed within the distal end of the sheath.
FIG. 19A illustrates another embodiment of a retrieval assembly according to the invention.
FIG. 19B illustrates another embodiment of a retrieval assembly according to the invention.
FIG. 20A illustrates the retrieval assembly illustrated in FIG. 19A collapsed within the sheath.
FIG. 20B illustrates the retrieval assembly illustrated in FIG. 20A extended from the 2o distal end of the sheath and open.
FIG. 20C illustrates a stone captured in the retrieval assembly illustrated in FIG. 20B.
FIG. 21A illustrates the retrieval assembly illustrated in FIG. 19B collapsed within the sheath.
FIG. 21B illustrates the retrieval assembly illustrated in FIG. 21A extended from the distal end of the sheath and open.
FIG. 21C illustrates a stone captured in the retrieval assembly illustrated in FIG. 21B.
FIG. 22A illustrates another embodiment of the retrieval assembly illustrated in FIG.
19A.
FIG 22B illustrates another embodiment of the retrieval assembly illustrated in FIB. 19B.
3 o Description Each of the following embodiments of a medical retrieval device according to the invention have at least the following properties. The retrieval assembly of the medical retrieval device is made from a rigid material and a flexible material. The proximal portion of the retrieval assembly is made with materials that are rigid relative to the materials used in the other parts of the retrieval assembly. The materials used in the portions of the retrieval assembly other than the proximal portion enhance flexibility of those portions relative to the flexibility of the proximal portion of the retrieval assembly.
In general, in one aspect, the invention features a medical retrieval device including a handle, a sheath, and a retrieval assembly. As illustrated in FIG. 1, a medical retrieval device 10 includes a handle 11 at a proximal end 12 having a handle base 13 and an actuating mechanism 14, such as a slider. A physician can grasp the handle base 13 in the palm of his or her hand and manipulate the actuating mechanism 14 with his or her thumb. A retrieval assembly 15 formed 1o in accordance with this invention is located at the distal end 16 (end furthest from operator) of the medical retrieval device 10. The retrieval assembly 15, according to the invention, may have a number of different embodiments, one of which is illustrated in FIG. l, and will be discussed in greater detail below. A sheath 17 overlies an intermediate supporting structure, such as an elongated member 40, between the handle 11 and the retrieval assembly 15. The sheath 17 15 typically comprises a polyimide tube or a tube made from other materials that exhibit radial flexibility, axial stiffness, and biocompatibility.
The outside diameter of the sheath 17 can range from 1.7-8.0 French (Fr.).
preferably 3.0 Fr. The retrieval assembly 15 is the type that can be collapsed within a sheath 17 for entry into the body. The handle 11, sheath 17, and retrieval assembly 15 illustrated in FIG. 1 are not shown 2o in their correct size or proportion to each other. The size of the entire sheath is dimensioned to fit the requirements of the application of the sheath 17 in the body. For example, for urological applications, the size of the device is typically 1.7-8.0 Fr. The sheath 17 has at least one lumen 9 therein, may be made from a single material, and extends from the handle 11 to a distal sheath end 18. An elongated member 40 such as a cable, coil, shaft, guidewire or mandril wire extends 25 within the lumen 9 from the device handle 11 to the base 30 of the retrieval assembly 15, where the elongated member 40 is attached at its distal end to the retrieval assembly 15.
The elongated member 40 is operably joined to one or more actuating mechanisms 14 at the device handle 11. Referring to FIG. 1, when the actuating mechanism 14 is located at position 14c, retrieval assembly 15 is extended beyond the distal end 18 of the sheath 17 and 30 completely open as illustrated in FIG. 2. As the actuating mechanism 14 is moved to position 14b, the retrieval assembly 15 moves to the position depicted in FIG. 3. When the actuating mechanism 14 is moved to position 14a, the retrieval assembly is compacted by sheath 17 which covers the retrieval assembly 15 within the lumen 9 of the sheath 17 as depicted in FIG. 4A.
Alternatively, in another embodiment, the mechausm 14 can cause movement of the sheath 17 to advance the sheath 17 over the stationary retrieval assembly 15 and elongated member 40 combination, to thereby collapse the retrieval assembly 15 within the sheath 17. In this embodiment, as shown in FIG. 1, as the actuating mechanism advances from proximal position 14a to intermediate position 14b as depicted in phantom, the sheath 17 advances from the position depicted in FIG. 2 to the position shown in FIG. 3. As the actuating mechanism is advanced further to position 14c, the sheath 17 compacts and covers the retrieval assembly 15 as shown in FIG. 4A.
In general, both types of retrieval assembly/sheath movement configurations and related l0 handle mechanisms are known, and can be seen in existing product designs available from, for example, Boston Scientific Corporation (Naticlc, MA). With the retrieval assembly 15 collapsed within the sheath 17 as shown in FIG. 4A, the sheath 17 can be inserted into the body by an operator to a site in the body where the material to be retrieved is located (e.g., a stone in the teeter). By placing the retrieval assembly 15 into its open/expanded position, as illustrated in FIG. 2, the retrieval assembly 15 dilates the body tract in which it has been placed and can be manipulated by the operator to entrap or capture material within the retrieval assembly 15.
In general, in one aspect, referring to FIG. 2, the retrieval assembly 15 is a basket formed by a plurality of legs 21. The number of legs can be as many as 2-20. In this aspect of the invention, the retrieval assembly 15 is divisible into multiple basket portions such as a proximal 2o baslcet portion 22 and a distal basket portion 24. The legs 21 of the basket also have a proximal leg portion 26 and a distal leg portion 28. The proximal leg portion 26 is located within the proximal basket portion 22 and the distal leg portion 28 is located within the distal baslcet portion 24. The proximal end of the proximal leg portion 26 is joined to the elongated member 40 axially disposed within the lumen 9 of the sheath 17.
In general, the proximal leg portion 26 and the distal leg portion 28 of each leg 21 are made with different materials. The proximal leg portion 26 is formed with a first material that is more rigid than the second material used in the distal leg portion 28. For example, the proximal leg portion 26 is formed with stainless steel' and the distal leg portion 28 is formed with Nitinol sills, nylon, other shape memory materials such as nickel-titanium, nclcel-titanium-copper, and 3o niclcel-titanium-lead. Other combinations of material are also contemplated by the invention as long as the strands of the proximal leg portion 26 are more rigid than the filaments of the distal leg portion 28.
A retrieval assembly that includes a rigid proximal portion and a comparatively flexible distal portion has the advantage of providing both sufficient strength for dilating a body tract and sufficient flexibility for capturing a stone or other material within the body tract. The strands of the proximal leg portion 26 facilitate the ease by which stones or other material are captured.
The gaps between the strands in the proximal basket portion 22, are comparatively wider than the gaps between the filaments in the distal basket portion 24. Moreover, the flexibility of the distal basket portion 24 permits capture of stones with diameters greater than the width of the gap between the legs 21. The filaments of the distal leg portions 28 flex to permit large stones to pass through the gaps between the legs 21 in the distal basket portion 24.
After a stone is to captured, the stone is trapped in the distal basket portion 24 of the retrieval assembly 15 where the gaps between the filaments of the distal leg portions 28 are comparatively narrow.
The flexible distal basket portion 24 of the retrieval assembly 15 enhances the ease by which a stone is captured when the stone is located distal to the retrieval assembly 15 or lateral to the distal basket portion 24 of the retrieval assembly 15. While the rigid proximal baslcet portion 22 of the retrieval assembly 15 has the strength to dilate the body tract, the flexible filaments of the distal basket portion 24 have the flexibility to flex apart to enable capture of a stone through the gaps between the filaments. The stone may enter through the distal portion of the basket via the distal end 23 of the retrieval assembly or through the side of the distal basket portion 24 of the retrieval assembly 15. Compared to rigid retrieval assemblies, the flexible distal baslcet 2o portion 24 of the retrieval assembly 15 also minimizes trauma to the body tract that might result when the retrieval device is expanded in a body tract.
The filaments in the distal leg portion 28 constitute separate wires, or alternatively, the filaments are made from one wire or more than one wire, that is attached to the distal end 32 of a strand in the proximal leg poution 26 that comprises solid, twisted or braided wire. The number of filaments in the distal leg portion 28 attached to the distal end 32 of a strand in the proximal leg portion 26 is at least one, and preferably as many as 2-10.
Connection of the filaments at the proximal end 33 of the distal leg portion 28 to the distal end 32 of the strands in the proximal leg portion 26 at a joint 27 is accomplished by a number of means. For example, as illustrated in FIGS. 5A and 5B, the filaments at the proximal 3o end 33 of the distal leg portion 28 are crimped to the distal end 32 of the strands in the proximal leg portion 26 at a joint 27, or, as illustrated in FIGS. 6A and 6B, two filaments in the distal leg .
portion 28 are formed from a single wire that pass through a hole 34 positioned at the distal end 32 of the strand in the proximal leg portion 26. Alternatively, as illustrated in FIGS. 7A and 7B, and 8A and 8B, one or more filaments in the distal leg portion 28 passes through a partially closed loop or hook 36 positioned at the distal end 32 of a strand in the proximal leg portion 26.
Other mechanisms by which the filaments at the proximal end 33 of the distal leg portion 28 are j oined to the strands include solder, weld, knot, or adhesive. The number of filaments in the distal leg portion 28 that are shown in FIGS. 5A and SB through FIGS. 8A and 8B are meant to be illustrative and are not limited to only those embodiments shown. The ratio of strands to f laments is equal to, or less than one.
In a particular embodiment, referring to FIGS. 2, 9, and 14-17, the proximal leg portion 26 of a leg 21 of the retrieval assembly 15 according to the invention, features a strand of to material. The distal leg portion 28 of a leg 21 features a plurality of filaments that extend distally from each of the strands of the proximal leg portion 26 to a distal end 23 of the retrieval assembly. In one embodiment, illustrated in FIG. 2, for example, the distal ends of the filaments in the distal leg portion 28 are bundled together in an end cap 25. The cap 25 captures the distal ends of alI the filaments of the distal leg portion 28 in the cap 25, by swaging or by some other means to form a distal end 23 of the basket 15.
In one embodiment, an individual strand of the proximal leg portion 26 is prestressed or preformed. Consequently, without confinement by the sheath 17, the strands in the proximal portion 22 of the retrieval assembly 15 diverge from each other as they extend distally. The filaments of the distal leg portion 28 are preformed to follow a straight or helical path from the ends of the strands in the proximal leg portion 26 to converge at the distal end 23 of the retrieval assembly to thereby define the distal leg portion 28 of the basket 15.
While FIG. 4A illustrates the strands in the proximal leg portion 26 extending essentially parallel to each other, it will be understood that the strands in the proximal leg portion 26 could be intertwined or twisted while still retaining a compact cross-section. The strands in the proximal leg portion 26 of the proximal portion 22 of the retrieval assembly 15 could be preformed or stressed to follow a helical path between the base 30 of the retrieval assembly 15 and the distal portion 24 of the retrieval assembly 15. Additionally, as shown in FIG. 4B, the strands in the proximal leg portion 26 could vary in length to ease collapse of the retrieval assembly 15 in the sheath 17. With either of these constructions, the distal end 23 of the retrieval 3o assembly 15 remains radially flexible and, by virtue of the sheath 17, axially stiff to facilitate placement of the retrieval device 10.
At least one wire is used to make the filaments of the distal leg portion 28 in the distal portion 24 of the retrieval assembly I 5. For example, as illustrated in FIG.
9, one wire is used to make two filaments of the distal leg portion 28. A section of the wire passes through joint 27 at the distal end 32 of the strand of the proximal leg portion 26 in the manner illustrated in FIGS.
6A and 6B. Both ends of the one wire are attached to the distal end cap 25.
The joint 27 may take any of the forms described above, such as a hole, hook, or crimp.
Alternatively, one wire is used to malce three, four, or more filaments of the distal leg portion 28. As shown in FIG. 10A, in a one wire, four filament embodiment, the one wire is passed multiple times between the joint 27, and distal end 23 of the retrieval assembly 15. It is possible to have any combination of wires to form the filaments, for example, at least one wire forming at least two filaments, and two additional wires forming two additional filaments, all to four filaments extending from the distal end 32 of a single strand to form the distal leg portion 28 of a single leg 21.
In another embodiment, illustrated in FIG. 1 OB, the same wire may be used for f lament 28a of leg 21a and for filament 28b of leg 21b. The wire passes through the joint 27a at the distal end 32 of the strand of proximal leg portion 26a, than passes distally to the distal end 23 of the retrieval assembly 15, then proximally to joint 27b at the distal end 32 of the strand of proximal leg portion 26b. In one embodiment, as illustrated in FIG. l OC, the filaments are not attached together or to an end cap at distal end 23. In this embodiment, the retrieval assembly 15 resembles an egg whip. Alternatively, an end cap may be used to gather together the filaments at the distal end 23 of the retrieval assembly 15 illustrated in FIG. 11.
In yet another embodiment according to the invention, illustrated in FIG. 11, the strands in the proximal leg portion 26 of a retrieval assembly 15 are extensions of twisted or braided strands that form an elongated member 40 or cable. Alternatively, the proximal ends of strands in the proximal leg portion are attached to an elongated member 40 by any means such as by, for example, insertion in a short cannula, crimping, soldering, welding, swaging, or the use of an adhesive.
In a clinical application in one embodiment, an operator introduces the retrieval device 10 with its distal tip 23 of the retrieval assembly 15 in the form shown in FIG.
4A so that the sheath 17 retains the retrieval baslcet 15 in its compact form. When the distal tip 23 of the retrieval assembly 15 is positioned proximate calculi or any other material to be retrieved, the operator 3o moves the actuating mechanism 14 from position 14c to the position 14A in FIG. 1. This retracts the sheath 17 and exposes the proximal portion 22 and distal portion 24 of the retrieval assembly 15. The legs 21 return to their original shape as shown in FIG. 2 thereby to dilate surrounding tissue and to provide a structure that can be manipulated to capture calculi within the confines of the retrieval assembly I 5. Preferably, the distal tip 23 of the retrieval assembly I S is positioned distally of the material to be retrieved prior to displacement of the sheath 17 so that the retrieval assembly 15 is adjacent or distally proximate to the material to ease and speed capture of the material within the retrieval assembly I5.
With the present invention, an operator can manipulate the retrieval assembly 15 so that calculi or other material move in the gap between the filaments in the. distal leg portion 28 or between strands in the proximal Ieg portion 26. The reduced number of strands in the proximal portion 22 of the retrieval assembly 15 greatly facilitates and simplifies this taslc.
FIG. 9 depicts an alternative embodiment of a retrieval basket 15a and sheath 17a at a l0 distal end 16a of the retrieval device 10a. In this particular embodiment, the retrieval assembly 1 Sa has four legs 21 a. Each of the legs 21 a has a proximal portion 26a in the form of an individual strand. A distal portion 28a of each of the legs 21 a has two filaments extending from the distal end 32 of the associated one of the individual strands in the proximal leg portion 26a to a cap 25a to define a distal portion 24 of the retrieval assembly 15a. The cap 25a captures the ends of all of the filaments in the distal leg portion 28a to define the distal tip 23 of the retrieval assembly 1 Sa. In this particular embodiment, each of the strands of the proximal leg portion 26a are angularly spaced by about 90° from adjacent strands, while the filaments of the distal leg portion 28a are helically wound and angularly spaced by about 45°.
According to the invention, the proximal 22 and distal portions 24 of the retrieval 2o assembly 15 are collapsed within the sheath 17 in a first position. When the distal portion 24 of the retrieval assembly 15 is extended beyond the end 18 of the sheath 17, the distal portion 24 of the retrieval assembly 15 expands into a second position. When both the proximal 22 and distal portions 24 of the retrieval assembly 15 are extended beyond the distal end 18 of the sheath 17 and expanded, the retrieval assembly 15 is in a third position. Positions 1 (one) through 3 (three) of the retrieval assembly 15 are positions along a continuum from entirely collapsed to entirely expanded retrieval assembly positions.
The contour of the retrieval assembly 15 of the invention may take a variety of shapes.
RefeiTing to FIGS. 12A and 12B, by example, an alternate embodiment of a retrieval assembly or baslcet 15 is shown. As shown in FIG. 12A, the basket legs 21 of the distal basket portion 24 are 3o convex, i.e., the legs 21 are bowed out from the basket center axis. In this embodiment, as the baslcet moves from the first position to the second position, the distal baslcet portion 24 assumes a bulbous shape. When the basket 15 is extended further from the end 18 of the sheath 17, the proximal basket portion 22 extends from the end of the sheath 17 expanding as the basket 15 is moved from the second position to the third position, illustrated in FIG. 12B.
The overall basket contour assumes a peanut shape.
The basket legs 21 of the basket 15 shown in FIGS. 12A and 12B may be preformed or bent before the baslcet 15 is assembled. The legs 21 can be bent in any manner lalov~m to one slcilled in the art, for example, as detailed in U.S. Patent No. 5,658,296, the entirety of which is incorporated by reference, herein.
In another embodiment, shown in FIG. I3, the legs 2I of the proximal portion 22 of the baslcet 15 axe substantially straight. As the basket is extended from the distal end 18 of the sheath (not shown), the distal baslcet portion 24 expands and the basket assumes a bulbous shape 1o as shown in FIG. 13, second position (inner image). As the basket is extended still further from the distal end of the sheath, the proximal portion 22 of the basket expands.
As shown in the third position (outer image) of FIG. 13, the overall contour of the basket 15 in the third position is cone-shaped. The diameter of the proximal basket portion 22 increases uniformly from the proximal end to the distal end of the proximal basket portion 22.
In another embodiment according to the invention, the contour of the distal basket portion 28 is helical. As illustrated in FIG. 9 for example, the distal portion 24 of the basket is comprised of a plurality of spiral-shaped filaments extending from each of the strands of the proximal leg portion 26 of each leg 21. The spiral-shaped filaments 28 may be paired. The filaments can be similar to the sets of filaments disclosed in U.S. Patent No.
5,496,330, the 2o entirety of U.S. Patent No. 5,496,330 incorporated by reference, herein. As the distal baslcet portion 24 is extended beyond the end 18 of the sheath 17, the distal baslcet portion 24 expands into a substantially helical shape. The basket 20 elongates and expands as the proximal basket portion 22 is extended from the end 18 of the sheath 17 and the basket 20 assumes the third basket position illustrated in FIG. 9.
The use of multiple filaments for the distal portion 28 of a leg 21, increases the number of contact points of the retrieval assembly 15 with any entrapped calculi. In FIG. 9, for example, eight filaments in the distal basket portion 24 contact the calculi rather than four filaments.
Moreover, the close equiangular spacing of adjacent filaments in a given leg also permits the wires collectively to accommodate any surface unevenness of such calculi surfaces to fiu-ther 3o increase the reliability with which the basket 15 entraps calculi.
FIG. 14 depicts the proximal and distal portions 22b and 24b of the retrieval assembly 15b at the distal end of another embodiment of a retrieval device l Ob.
Retraction of the sheath 17b at the distal end of the retrieval device to the illustrated position enables the proximal and distal portions 22b and 24b to form the enlarged retrieval assembly 15b extending between a cap 25b and the retrieval assembly base 30 joined to the elongated member 40b. Two legs 21 define the retrieval assembly 1 Sb, with each of the legs comprising an individual strand 26b extending distally from the proximal end of the basket and six filaments 28b extending proximally from the distal end 23 of the baslcet to the distal end 32 of the associated strand 26b. The filaments 28b in this instance are prestressed to follow a helical path. The filaments 28b are joined to the strands 26b at joint 27 by any of the joints illustrated in FIGS. 5A and SB through FIGS. 8A and 8B.
FIGS. 15-17 illustrate other retrieval device embodiments constructed in accordance with this invention. The retrieval assemblies 15c, 15d and 15e of the retrieval devices l Oc, l Od and l0 10e comprise a plurality of legs 21 with each of the legs 21 having substantially more filaments in the distal leg portion 28 of the retrieval assembly 15 than strands in the proximal leg portion 26. For example, each of the legs 21c of the basket 15c of FIG. 15 comprises a strand in the proximal leg portion 26c and five filaments in the distal leg portion 28c, while each of the three legs 21d of the baslcet 15d of FIG. 16 comprise a strand in the proximal leg portion 26d and three filaments in the distal leg portion 28d. Four legs 21d define the retrieval assembly 15e of FIG.
17. Each leg 21 a includes an individual strand in the proximal leg portion 26e and four filaments in the distal leg portion 28e. Although, each of the filaments of the retrieval assemblies 15c, 15d and 15e are prestressed, they are not helically wound like the filaments of the baskets 15a and 15b of FIGS. 9 and 14. For example, in FIG. 17, each of the filaments in the distal leg portion 28e between one of the strands in the proximal leg portion 26e and the cap 25e is prestressed to extend radially away from the axis of the retrieval assembly 1 Se and to be spaced from each of the other filaments.
The baslcets 15 described in connection with FIGS. 2, 9, and 14 through 17 may also be formed by the method described in the co-pending, commonly assigned U.S.
Patent 5,658,296.
Using the process described therein provides strands and filaments with improved strength, durability and other characteristics.
In another aspect of the invention, referring to FIG. 18, a retrieval assembly features a plL~rality of legs 21. The legs 21 comprise a strand that is positioned in the proximal portion 22 of the retrieval assembly 15. The strands of the proximal portion 22 of the retrieval assembly are 3o made with rigid materials, for example, stainless steel. The distal portion of the retrieval assembly features a flat distal end 23 that is positioned at the distal end 32 of the strands of the proximal leg portion 26 of the retrieval assembly 15. The distal end 23 comprises a plurality of flexible wires 29 oriented in a plane substantially perpendicular to the long axis of the retrieval device 10. At least one of the wires 29 at the distal end 23 is made with a material that is more flexible than the material comprising the strands of the proximal basket portion 22. The wires 29 comprising the distal end 23 of the retrieval assembly 15 extend from the distal end 32 of one strand of the proximal basket portion 22 to the distal end 32 of an adjacent strand or to the distal end 32 of another strand of the proximal baslcet portion 22. The number of legs or strands in the proximal basket portion 22 may be 3, 5, 6, 7, 8 or more and is not limited to the number of strands illustrated.
As illustrated in FIGS. 18B and 18C, in one embodiment of this aspect of the invention, the distal end 23 of the retrieval assembly 15 includes at least one wire 29 that extends from the to distal end 32 of one strand of the proximal portion of the retrieval assembly 22, to a distal end 32 of an adj acent strand, or, alternatively, the at least one wire 29 extends across the area defined by the distal ends 32 of the strands to the distal end 32 of another strand of the proximal leg portion.
Any pattern of wires extending from the end 32 of one strand to an end 32 of another strand is contemplated by the invention. The wires 29 of the distal end 23 of the retrieval assembly 15 may form patterns other than the patterns illustrated in FIGS. 18B and 18C.
In clinical applications, the device 10 illustrated in FIG. 18A is inserted into a body tract with the retrieval assembly collapsed within the sheath 17. When the distal end 18 of the sheath .
passes by or is positioned adjacent to the stone or other material to be retrieved. The retrieval assembly 15 and sheath 17 are moved relative to one another to extend the retrieval assembly 15 2o beyond the distal end of the sheath 18 and open. The gap or distance between basket legs 21 is thereby increased. The distal end 23 of the basket 15 is maneuverable largely because of the flexible material used in malting the distal end 23. The proximal portion 22 of the retrieval assembly is comparatively rigid because the proximal portion 22 is made with material more rigid than the material used in the distal end 23. Thus, the proximal portion 22 has the strength to dilate the body tract around the stone or other material and the distal basket portion 24 has the flexibility to entrap the stone or other material in the retrieval assembly 15. To capture a stone or other material, the stone passes between the gaps in the strands of the proximal portion 22 of the retrieval assembly 15 and is trapped in the confines between the strands of the proximal portion 22 of the retrieval assembly 15 and the distal end 23 of the retrieval assembly 15.
3o In an alternate embodiment of this aspect of the invention, illustrated in FIGS. 18D-18G, a second elongated guidewire 41 parallels or extends through a lumen in the first guidewire 40, and is joined at~its distal end to the distal end 23 of the retrieval assembly 15 and at its proximal end to a second actuator 42. To capture material 60 in a body tract, the retrieval assembly 15 is open and extended beyond the distal end of the sheath 17 as illustrated in FIG
18E. A stone 60 is approached by the retrieval assembly 15 and trapped between the retrieval assembly 15 and a body tissue 44. As illustrated in FIG. 18F, the second actuator 42 is actuated proximally in the direction of the arrow to axially move the second elongated guidewire 41 proximally. The distal 5 end 23 of the retrieval assembly 15 is thereby moved towards the distal end of the sheath 17, collapsing the retrieval assembly 15 around the stone 60. Actuator 14, illustrated in FIG. 18G, is then moved proximally in the direction of the arrow to draw the retrieval assembly 15 with the captured stone 60 partially or entirely into the distal end of the sheath 17.
In another aspect of the invention, in one embodiment, the retrieval assembly 15, to illustrated in FIGS. 19A and 19B, has a proximal portion 22 and a distal portion 24. The proximal portion 22 of the retrieval assembly has a plurality of legs 21. The distal portion 24 of the retrieval assembly 15 is pocket shaped having an apex 38 and pocket edges 39 that are joined to the ends 32 of the legs 21 of the proximal basket portion 22. The proximal portion 22 of he retrieval assembly 15 is made with a different material than the distal portion 24 of the retrieval 15 assembly.
The legs 21 of the proximal portion 22 of the retrieval assembly are made with rigid material, such as stainless steel, and are attached at their proximal end to an elongated member 40, and at their distal end 32 to the pocket edges 39 of the pocket in the distal portion 24 of the retrieval assembly. The legs 21 at their distal end 32 are attached to the pocket edges 39 by 2o sutures, adhesives, loops, hooks or any other joining means known to a skilled person.
The poclcet-shaped distal portion 24 of the retrieval assembly 15 is a netting or mesh made with a flexible material such as Nitinol. The openings in the mesh are large enough to permit fluids to pass but small enough to impede movement of material, such as stones larger than O.lmm, through the mesh.
The mesh of the distal portion 24 of the retrieval assembly 15 forms a pocket.
In one embodiment, the apex 3 8 of the pocket in the distal portion 24 is positioned at the distal end 23 of the retrieval assembly 15. In this embodiment, the retrieval assembly is used to "net" or "sweep" material in a body tract. As illustrated in FIGS. 20A-20C, the retrieval device 10 is inserted into a body tract with the retrieval assembly 15 collapsed within the sheath 17 as 3o illustrated in FIG. 20A. When the distal end 18 of the sheath 17 is advanced past a stone 60 or other material to be removed, the retrieval assembly 15 is extended beyond the distal end of the sheath as illustrated in FIG. 20B. With the retrieval assembly 15 positioned beyond the distal end of the sheath, the retrieval assembly 15 is manipulated around the stone 60 to capture the stone 60 in the pocket formed in the distal portion 24 of the retrieval assembly as illustrated in FIG. 20C.
In another embodiment of this aspect of the invention, illustrated in FIGS.
21A-21 C, the apex 38 of the poclcet in the distal portion 24 of the retrieval assembly 15 is located proximal to the ends 32 of the legs 21 of the proximal portion 22 of the retrieval assembly 15. In this embodiment, the pocket of the distal portion 24 of the retrieval assembly is used to "scoop"
stones or other material in the body tract. The medical retrieval device is inserted into a body tract with the retrieval assembly 15 collapsed within the sheath 17 as illustrated in FIG. 21A.
When the distal end 18 of the sheath 17 approaches the stone 60 or other material to be removed, the retrieval assembly 15 is moved to the position illustrated in FIG. 21B.
With the retrieval assembly positioned as shown in FIG. 21B, the retrieval assembly 15 is advanced over the stone 60 capturing the stone 60 in the pocket of the distal portion 24 of the retrieval assembly 15 as illustrated in FIG. 21 C.
Another embodiment of the invention illustrated in FIGS. 19A-19B, 20A-20C, and 21 C, is illustrated in FIGS. 22A and 22B. In this embodiment a second elongated guidewire 41 parallels or passes through an axially disposed lumen of guidewire 40 (see FIGS. 18D-18G for comparison) and is attached distally to the mesh of the distal end portion 24 of the retrieval assembly 15. The proximal end of second guidewire 41 is operatively joined at its proximal end to second actuator 42 in the mamzer illustrated in FIG. 18D. Axial movement of the guidewire 41 proximally causes retrieval assembly 15 to move from the evened position illustrated in FIG.
22A to the inverted position illustrated in FIG. 22B. Thus, with a first actuator 14 operatively attached to guidewire 40, and a second actuator 42 operatively attached to guidewire 41, the medical retrieval assembly 15 of the retrieval device 10 illustrated in FIGS.
19A-19B, 20A-20C, 21A-21 C can be maneuvered to capture material in a body tract as illustrated in FIGS. 18E-18G
and discussed in the corresponding text.
In general, the medical retrieval device according to the invention can be used in a clinical application to retrieve biological or foreign material from within a body. For example, the device can be used to retrieve a stone (e.g., a stone in the gall bladder, biliary tree, ureter, kidney, urinary bladder, urethra, etc.). The device could also be used to capture a thrombus or 3o embolus within a vessel such as the coronary vessels of the hears or within the pulmonary vasculature. Regardless of the material being retrieved, the device 10 with the retrieval assembly 15 enclosed within a sheath 17 is inserted into a body tract. As the distal end 18 of the sheath approaches a stone 60, or passes to one side of a stone 60, the retrieval assembly is moved relative to the sheath 17 and extended beyond the distal end 15 of sheath 17.
The retrieval assembly 15 is maneuvered around the stone 60 to capture the stone 60 within the confines of the retrieval assembly 15 after the stone 60 passes through the gap between the legs 21 of the retrieval assembly 15. The stone 60 may be approached from the side or from the proximal or distal end of the retrieval assembly. The stone 60 is captured in the retrieval assembly 15. The stone 60 is removed from the body tract by withdrawing the entire medical instrument 10 with the retrieval assembly 15 containing the stone 60, from the body tract.
It will be apparent to those slcilled in the art that various modifications and variations can be made to the structure and methodology of the present invention without departing from the to scope or spirit of the invention. In view of the foregoing, it is intended that the present invention cover modifications and variations of this invention provided they fall within the scope of the following claims and their equivalents.
What is claimed is:
In general, in one aspect, the invention features a medical retrieval device including a handle, a sheath, and a retrieval assembly. As illustrated in FIG. 1, a medical retrieval device 10 includes a handle 11 at a proximal end 12 having a handle base 13 and an actuating mechanism 14, such as a slider. A physician can grasp the handle base 13 in the palm of his or her hand and manipulate the actuating mechanism 14 with his or her thumb. A retrieval assembly 15 formed 1o in accordance with this invention is located at the distal end 16 (end furthest from operator) of the medical retrieval device 10. The retrieval assembly 15, according to the invention, may have a number of different embodiments, one of which is illustrated in FIG. l, and will be discussed in greater detail below. A sheath 17 overlies an intermediate supporting structure, such as an elongated member 40, between the handle 11 and the retrieval assembly 15. The sheath 17 15 typically comprises a polyimide tube or a tube made from other materials that exhibit radial flexibility, axial stiffness, and biocompatibility.
The outside diameter of the sheath 17 can range from 1.7-8.0 French (Fr.).
preferably 3.0 Fr. The retrieval assembly 15 is the type that can be collapsed within a sheath 17 for entry into the body. The handle 11, sheath 17, and retrieval assembly 15 illustrated in FIG. 1 are not shown 2o in their correct size or proportion to each other. The size of the entire sheath is dimensioned to fit the requirements of the application of the sheath 17 in the body. For example, for urological applications, the size of the device is typically 1.7-8.0 Fr. The sheath 17 has at least one lumen 9 therein, may be made from a single material, and extends from the handle 11 to a distal sheath end 18. An elongated member 40 such as a cable, coil, shaft, guidewire or mandril wire extends 25 within the lumen 9 from the device handle 11 to the base 30 of the retrieval assembly 15, where the elongated member 40 is attached at its distal end to the retrieval assembly 15.
The elongated member 40 is operably joined to one or more actuating mechanisms 14 at the device handle 11. Referring to FIG. 1, when the actuating mechanism 14 is located at position 14c, retrieval assembly 15 is extended beyond the distal end 18 of the sheath 17 and 30 completely open as illustrated in FIG. 2. As the actuating mechanism 14 is moved to position 14b, the retrieval assembly 15 moves to the position depicted in FIG. 3. When the actuating mechanism 14 is moved to position 14a, the retrieval assembly is compacted by sheath 17 which covers the retrieval assembly 15 within the lumen 9 of the sheath 17 as depicted in FIG. 4A.
Alternatively, in another embodiment, the mechausm 14 can cause movement of the sheath 17 to advance the sheath 17 over the stationary retrieval assembly 15 and elongated member 40 combination, to thereby collapse the retrieval assembly 15 within the sheath 17. In this embodiment, as shown in FIG. 1, as the actuating mechanism advances from proximal position 14a to intermediate position 14b as depicted in phantom, the sheath 17 advances from the position depicted in FIG. 2 to the position shown in FIG. 3. As the actuating mechanism is advanced further to position 14c, the sheath 17 compacts and covers the retrieval assembly 15 as shown in FIG. 4A.
In general, both types of retrieval assembly/sheath movement configurations and related l0 handle mechanisms are known, and can be seen in existing product designs available from, for example, Boston Scientific Corporation (Naticlc, MA). With the retrieval assembly 15 collapsed within the sheath 17 as shown in FIG. 4A, the sheath 17 can be inserted into the body by an operator to a site in the body where the material to be retrieved is located (e.g., a stone in the teeter). By placing the retrieval assembly 15 into its open/expanded position, as illustrated in FIG. 2, the retrieval assembly 15 dilates the body tract in which it has been placed and can be manipulated by the operator to entrap or capture material within the retrieval assembly 15.
In general, in one aspect, referring to FIG. 2, the retrieval assembly 15 is a basket formed by a plurality of legs 21. The number of legs can be as many as 2-20. In this aspect of the invention, the retrieval assembly 15 is divisible into multiple basket portions such as a proximal 2o baslcet portion 22 and a distal basket portion 24. The legs 21 of the basket also have a proximal leg portion 26 and a distal leg portion 28. The proximal leg portion 26 is located within the proximal basket portion 22 and the distal leg portion 28 is located within the distal baslcet portion 24. The proximal end of the proximal leg portion 26 is joined to the elongated member 40 axially disposed within the lumen 9 of the sheath 17.
In general, the proximal leg portion 26 and the distal leg portion 28 of each leg 21 are made with different materials. The proximal leg portion 26 is formed with a first material that is more rigid than the second material used in the distal leg portion 28. For example, the proximal leg portion 26 is formed with stainless steel' and the distal leg portion 28 is formed with Nitinol sills, nylon, other shape memory materials such as nickel-titanium, nclcel-titanium-copper, and 3o niclcel-titanium-lead. Other combinations of material are also contemplated by the invention as long as the strands of the proximal leg portion 26 are more rigid than the filaments of the distal leg portion 28.
A retrieval assembly that includes a rigid proximal portion and a comparatively flexible distal portion has the advantage of providing both sufficient strength for dilating a body tract and sufficient flexibility for capturing a stone or other material within the body tract. The strands of the proximal leg portion 26 facilitate the ease by which stones or other material are captured.
The gaps between the strands in the proximal basket portion 22, are comparatively wider than the gaps between the filaments in the distal basket portion 24. Moreover, the flexibility of the distal basket portion 24 permits capture of stones with diameters greater than the width of the gap between the legs 21. The filaments of the distal leg portions 28 flex to permit large stones to pass through the gaps between the legs 21 in the distal basket portion 24.
After a stone is to captured, the stone is trapped in the distal basket portion 24 of the retrieval assembly 15 where the gaps between the filaments of the distal leg portions 28 are comparatively narrow.
The flexible distal basket portion 24 of the retrieval assembly 15 enhances the ease by which a stone is captured when the stone is located distal to the retrieval assembly 15 or lateral to the distal basket portion 24 of the retrieval assembly 15. While the rigid proximal baslcet portion 22 of the retrieval assembly 15 has the strength to dilate the body tract, the flexible filaments of the distal basket portion 24 have the flexibility to flex apart to enable capture of a stone through the gaps between the filaments. The stone may enter through the distal portion of the basket via the distal end 23 of the retrieval assembly or through the side of the distal basket portion 24 of the retrieval assembly 15. Compared to rigid retrieval assemblies, the flexible distal baslcet 2o portion 24 of the retrieval assembly 15 also minimizes trauma to the body tract that might result when the retrieval device is expanded in a body tract.
The filaments in the distal leg portion 28 constitute separate wires, or alternatively, the filaments are made from one wire or more than one wire, that is attached to the distal end 32 of a strand in the proximal leg poution 26 that comprises solid, twisted or braided wire. The number of filaments in the distal leg portion 28 attached to the distal end 32 of a strand in the proximal leg portion 26 is at least one, and preferably as many as 2-10.
Connection of the filaments at the proximal end 33 of the distal leg portion 28 to the distal end 32 of the strands in the proximal leg portion 26 at a joint 27 is accomplished by a number of means. For example, as illustrated in FIGS. 5A and 5B, the filaments at the proximal 3o end 33 of the distal leg portion 28 are crimped to the distal end 32 of the strands in the proximal leg portion 26 at a joint 27, or, as illustrated in FIGS. 6A and 6B, two filaments in the distal leg .
portion 28 are formed from a single wire that pass through a hole 34 positioned at the distal end 32 of the strand in the proximal leg portion 26. Alternatively, as illustrated in FIGS. 7A and 7B, and 8A and 8B, one or more filaments in the distal leg portion 28 passes through a partially closed loop or hook 36 positioned at the distal end 32 of a strand in the proximal leg portion 26.
Other mechanisms by which the filaments at the proximal end 33 of the distal leg portion 28 are j oined to the strands include solder, weld, knot, or adhesive. The number of filaments in the distal leg portion 28 that are shown in FIGS. 5A and SB through FIGS. 8A and 8B are meant to be illustrative and are not limited to only those embodiments shown. The ratio of strands to f laments is equal to, or less than one.
In a particular embodiment, referring to FIGS. 2, 9, and 14-17, the proximal leg portion 26 of a leg 21 of the retrieval assembly 15 according to the invention, features a strand of to material. The distal leg portion 28 of a leg 21 features a plurality of filaments that extend distally from each of the strands of the proximal leg portion 26 to a distal end 23 of the retrieval assembly. In one embodiment, illustrated in FIG. 2, for example, the distal ends of the filaments in the distal leg portion 28 are bundled together in an end cap 25. The cap 25 captures the distal ends of alI the filaments of the distal leg portion 28 in the cap 25, by swaging or by some other means to form a distal end 23 of the basket 15.
In one embodiment, an individual strand of the proximal leg portion 26 is prestressed or preformed. Consequently, without confinement by the sheath 17, the strands in the proximal portion 22 of the retrieval assembly 15 diverge from each other as they extend distally. The filaments of the distal leg portion 28 are preformed to follow a straight or helical path from the ends of the strands in the proximal leg portion 26 to converge at the distal end 23 of the retrieval assembly to thereby define the distal leg portion 28 of the basket 15.
While FIG. 4A illustrates the strands in the proximal leg portion 26 extending essentially parallel to each other, it will be understood that the strands in the proximal leg portion 26 could be intertwined or twisted while still retaining a compact cross-section. The strands in the proximal leg portion 26 of the proximal portion 22 of the retrieval assembly 15 could be preformed or stressed to follow a helical path between the base 30 of the retrieval assembly 15 and the distal portion 24 of the retrieval assembly 15. Additionally, as shown in FIG. 4B, the strands in the proximal leg portion 26 could vary in length to ease collapse of the retrieval assembly 15 in the sheath 17. With either of these constructions, the distal end 23 of the retrieval 3o assembly 15 remains radially flexible and, by virtue of the sheath 17, axially stiff to facilitate placement of the retrieval device 10.
At least one wire is used to make the filaments of the distal leg portion 28 in the distal portion 24 of the retrieval assembly I 5. For example, as illustrated in FIG.
9, one wire is used to make two filaments of the distal leg portion 28. A section of the wire passes through joint 27 at the distal end 32 of the strand of the proximal leg portion 26 in the manner illustrated in FIGS.
6A and 6B. Both ends of the one wire are attached to the distal end cap 25.
The joint 27 may take any of the forms described above, such as a hole, hook, or crimp.
Alternatively, one wire is used to malce three, four, or more filaments of the distal leg portion 28. As shown in FIG. 10A, in a one wire, four filament embodiment, the one wire is passed multiple times between the joint 27, and distal end 23 of the retrieval assembly 15. It is possible to have any combination of wires to form the filaments, for example, at least one wire forming at least two filaments, and two additional wires forming two additional filaments, all to four filaments extending from the distal end 32 of a single strand to form the distal leg portion 28 of a single leg 21.
In another embodiment, illustrated in FIG. 1 OB, the same wire may be used for f lament 28a of leg 21a and for filament 28b of leg 21b. The wire passes through the joint 27a at the distal end 32 of the strand of proximal leg portion 26a, than passes distally to the distal end 23 of the retrieval assembly 15, then proximally to joint 27b at the distal end 32 of the strand of proximal leg portion 26b. In one embodiment, as illustrated in FIG. l OC, the filaments are not attached together or to an end cap at distal end 23. In this embodiment, the retrieval assembly 15 resembles an egg whip. Alternatively, an end cap may be used to gather together the filaments at the distal end 23 of the retrieval assembly 15 illustrated in FIG. 11.
In yet another embodiment according to the invention, illustrated in FIG. 11, the strands in the proximal leg portion 26 of a retrieval assembly 15 are extensions of twisted or braided strands that form an elongated member 40 or cable. Alternatively, the proximal ends of strands in the proximal leg portion are attached to an elongated member 40 by any means such as by, for example, insertion in a short cannula, crimping, soldering, welding, swaging, or the use of an adhesive.
In a clinical application in one embodiment, an operator introduces the retrieval device 10 with its distal tip 23 of the retrieval assembly 15 in the form shown in FIG.
4A so that the sheath 17 retains the retrieval baslcet 15 in its compact form. When the distal tip 23 of the retrieval assembly 15 is positioned proximate calculi or any other material to be retrieved, the operator 3o moves the actuating mechanism 14 from position 14c to the position 14A in FIG. 1. This retracts the sheath 17 and exposes the proximal portion 22 and distal portion 24 of the retrieval assembly 15. The legs 21 return to their original shape as shown in FIG. 2 thereby to dilate surrounding tissue and to provide a structure that can be manipulated to capture calculi within the confines of the retrieval assembly I 5. Preferably, the distal tip 23 of the retrieval assembly I S is positioned distally of the material to be retrieved prior to displacement of the sheath 17 so that the retrieval assembly 15 is adjacent or distally proximate to the material to ease and speed capture of the material within the retrieval assembly I5.
With the present invention, an operator can manipulate the retrieval assembly 15 so that calculi or other material move in the gap between the filaments in the. distal leg portion 28 or between strands in the proximal Ieg portion 26. The reduced number of strands in the proximal portion 22 of the retrieval assembly 15 greatly facilitates and simplifies this taslc.
FIG. 9 depicts an alternative embodiment of a retrieval basket 15a and sheath 17a at a l0 distal end 16a of the retrieval device 10a. In this particular embodiment, the retrieval assembly 1 Sa has four legs 21 a. Each of the legs 21 a has a proximal portion 26a in the form of an individual strand. A distal portion 28a of each of the legs 21 a has two filaments extending from the distal end 32 of the associated one of the individual strands in the proximal leg portion 26a to a cap 25a to define a distal portion 24 of the retrieval assembly 15a. The cap 25a captures the ends of all of the filaments in the distal leg portion 28a to define the distal tip 23 of the retrieval assembly 1 Sa. In this particular embodiment, each of the strands of the proximal leg portion 26a are angularly spaced by about 90° from adjacent strands, while the filaments of the distal leg portion 28a are helically wound and angularly spaced by about 45°.
According to the invention, the proximal 22 and distal portions 24 of the retrieval 2o assembly 15 are collapsed within the sheath 17 in a first position. When the distal portion 24 of the retrieval assembly 15 is extended beyond the end 18 of the sheath 17, the distal portion 24 of the retrieval assembly 15 expands into a second position. When both the proximal 22 and distal portions 24 of the retrieval assembly 15 are extended beyond the distal end 18 of the sheath 17 and expanded, the retrieval assembly 15 is in a third position. Positions 1 (one) through 3 (three) of the retrieval assembly 15 are positions along a continuum from entirely collapsed to entirely expanded retrieval assembly positions.
The contour of the retrieval assembly 15 of the invention may take a variety of shapes.
RefeiTing to FIGS. 12A and 12B, by example, an alternate embodiment of a retrieval assembly or baslcet 15 is shown. As shown in FIG. 12A, the basket legs 21 of the distal basket portion 24 are 3o convex, i.e., the legs 21 are bowed out from the basket center axis. In this embodiment, as the baslcet moves from the first position to the second position, the distal baslcet portion 24 assumes a bulbous shape. When the basket 15 is extended further from the end 18 of the sheath 17, the proximal basket portion 22 extends from the end of the sheath 17 expanding as the basket 15 is moved from the second position to the third position, illustrated in FIG. 12B.
The overall basket contour assumes a peanut shape.
The basket legs 21 of the basket 15 shown in FIGS. 12A and 12B may be preformed or bent before the baslcet 15 is assembled. The legs 21 can be bent in any manner lalov~m to one slcilled in the art, for example, as detailed in U.S. Patent No. 5,658,296, the entirety of which is incorporated by reference, herein.
In another embodiment, shown in FIG. I3, the legs 2I of the proximal portion 22 of the baslcet 15 axe substantially straight. As the basket is extended from the distal end 18 of the sheath (not shown), the distal baslcet portion 24 expands and the basket assumes a bulbous shape 1o as shown in FIG. 13, second position (inner image). As the basket is extended still further from the distal end of the sheath, the proximal portion 22 of the basket expands.
As shown in the third position (outer image) of FIG. 13, the overall contour of the basket 15 in the third position is cone-shaped. The diameter of the proximal basket portion 22 increases uniformly from the proximal end to the distal end of the proximal basket portion 22.
In another embodiment according to the invention, the contour of the distal basket portion 28 is helical. As illustrated in FIG. 9 for example, the distal portion 24 of the basket is comprised of a plurality of spiral-shaped filaments extending from each of the strands of the proximal leg portion 26 of each leg 21. The spiral-shaped filaments 28 may be paired. The filaments can be similar to the sets of filaments disclosed in U.S. Patent No.
5,496,330, the 2o entirety of U.S. Patent No. 5,496,330 incorporated by reference, herein. As the distal baslcet portion 24 is extended beyond the end 18 of the sheath 17, the distal baslcet portion 24 expands into a substantially helical shape. The basket 20 elongates and expands as the proximal basket portion 22 is extended from the end 18 of the sheath 17 and the basket 20 assumes the third basket position illustrated in FIG. 9.
The use of multiple filaments for the distal portion 28 of a leg 21, increases the number of contact points of the retrieval assembly 15 with any entrapped calculi. In FIG. 9, for example, eight filaments in the distal basket portion 24 contact the calculi rather than four filaments.
Moreover, the close equiangular spacing of adjacent filaments in a given leg also permits the wires collectively to accommodate any surface unevenness of such calculi surfaces to fiu-ther 3o increase the reliability with which the basket 15 entraps calculi.
FIG. 14 depicts the proximal and distal portions 22b and 24b of the retrieval assembly 15b at the distal end of another embodiment of a retrieval device l Ob.
Retraction of the sheath 17b at the distal end of the retrieval device to the illustrated position enables the proximal and distal portions 22b and 24b to form the enlarged retrieval assembly 15b extending between a cap 25b and the retrieval assembly base 30 joined to the elongated member 40b. Two legs 21 define the retrieval assembly 1 Sb, with each of the legs comprising an individual strand 26b extending distally from the proximal end of the basket and six filaments 28b extending proximally from the distal end 23 of the baslcet to the distal end 32 of the associated strand 26b. The filaments 28b in this instance are prestressed to follow a helical path. The filaments 28b are joined to the strands 26b at joint 27 by any of the joints illustrated in FIGS. 5A and SB through FIGS. 8A and 8B.
FIGS. 15-17 illustrate other retrieval device embodiments constructed in accordance with this invention. The retrieval assemblies 15c, 15d and 15e of the retrieval devices l Oc, l Od and l0 10e comprise a plurality of legs 21 with each of the legs 21 having substantially more filaments in the distal leg portion 28 of the retrieval assembly 15 than strands in the proximal leg portion 26. For example, each of the legs 21c of the basket 15c of FIG. 15 comprises a strand in the proximal leg portion 26c and five filaments in the distal leg portion 28c, while each of the three legs 21d of the baslcet 15d of FIG. 16 comprise a strand in the proximal leg portion 26d and three filaments in the distal leg portion 28d. Four legs 21d define the retrieval assembly 15e of FIG.
17. Each leg 21 a includes an individual strand in the proximal leg portion 26e and four filaments in the distal leg portion 28e. Although, each of the filaments of the retrieval assemblies 15c, 15d and 15e are prestressed, they are not helically wound like the filaments of the baskets 15a and 15b of FIGS. 9 and 14. For example, in FIG. 17, each of the filaments in the distal leg portion 28e between one of the strands in the proximal leg portion 26e and the cap 25e is prestressed to extend radially away from the axis of the retrieval assembly 1 Se and to be spaced from each of the other filaments.
The baslcets 15 described in connection with FIGS. 2, 9, and 14 through 17 may also be formed by the method described in the co-pending, commonly assigned U.S.
Patent 5,658,296.
Using the process described therein provides strands and filaments with improved strength, durability and other characteristics.
In another aspect of the invention, referring to FIG. 18, a retrieval assembly features a plL~rality of legs 21. The legs 21 comprise a strand that is positioned in the proximal portion 22 of the retrieval assembly 15. The strands of the proximal portion 22 of the retrieval assembly are 3o made with rigid materials, for example, stainless steel. The distal portion of the retrieval assembly features a flat distal end 23 that is positioned at the distal end 32 of the strands of the proximal leg portion 26 of the retrieval assembly 15. The distal end 23 comprises a plurality of flexible wires 29 oriented in a plane substantially perpendicular to the long axis of the retrieval device 10. At least one of the wires 29 at the distal end 23 is made with a material that is more flexible than the material comprising the strands of the proximal basket portion 22. The wires 29 comprising the distal end 23 of the retrieval assembly 15 extend from the distal end 32 of one strand of the proximal basket portion 22 to the distal end 32 of an adjacent strand or to the distal end 32 of another strand of the proximal baslcet portion 22. The number of legs or strands in the proximal basket portion 22 may be 3, 5, 6, 7, 8 or more and is not limited to the number of strands illustrated.
As illustrated in FIGS. 18B and 18C, in one embodiment of this aspect of the invention, the distal end 23 of the retrieval assembly 15 includes at least one wire 29 that extends from the to distal end 32 of one strand of the proximal portion of the retrieval assembly 22, to a distal end 32 of an adj acent strand, or, alternatively, the at least one wire 29 extends across the area defined by the distal ends 32 of the strands to the distal end 32 of another strand of the proximal leg portion.
Any pattern of wires extending from the end 32 of one strand to an end 32 of another strand is contemplated by the invention. The wires 29 of the distal end 23 of the retrieval assembly 15 may form patterns other than the patterns illustrated in FIGS. 18B and 18C.
In clinical applications, the device 10 illustrated in FIG. 18A is inserted into a body tract with the retrieval assembly collapsed within the sheath 17. When the distal end 18 of the sheath .
passes by or is positioned adjacent to the stone or other material to be retrieved. The retrieval assembly 15 and sheath 17 are moved relative to one another to extend the retrieval assembly 15 2o beyond the distal end of the sheath 18 and open. The gap or distance between basket legs 21 is thereby increased. The distal end 23 of the basket 15 is maneuverable largely because of the flexible material used in malting the distal end 23. The proximal portion 22 of the retrieval assembly is comparatively rigid because the proximal portion 22 is made with material more rigid than the material used in the distal end 23. Thus, the proximal portion 22 has the strength to dilate the body tract around the stone or other material and the distal basket portion 24 has the flexibility to entrap the stone or other material in the retrieval assembly 15. To capture a stone or other material, the stone passes between the gaps in the strands of the proximal portion 22 of the retrieval assembly 15 and is trapped in the confines between the strands of the proximal portion 22 of the retrieval assembly 15 and the distal end 23 of the retrieval assembly 15.
3o In an alternate embodiment of this aspect of the invention, illustrated in FIGS. 18D-18G, a second elongated guidewire 41 parallels or extends through a lumen in the first guidewire 40, and is joined at~its distal end to the distal end 23 of the retrieval assembly 15 and at its proximal end to a second actuator 42. To capture material 60 in a body tract, the retrieval assembly 15 is open and extended beyond the distal end of the sheath 17 as illustrated in FIG
18E. A stone 60 is approached by the retrieval assembly 15 and trapped between the retrieval assembly 15 and a body tissue 44. As illustrated in FIG. 18F, the second actuator 42 is actuated proximally in the direction of the arrow to axially move the second elongated guidewire 41 proximally. The distal 5 end 23 of the retrieval assembly 15 is thereby moved towards the distal end of the sheath 17, collapsing the retrieval assembly 15 around the stone 60. Actuator 14, illustrated in FIG. 18G, is then moved proximally in the direction of the arrow to draw the retrieval assembly 15 with the captured stone 60 partially or entirely into the distal end of the sheath 17.
In another aspect of the invention, in one embodiment, the retrieval assembly 15, to illustrated in FIGS. 19A and 19B, has a proximal portion 22 and a distal portion 24. The proximal portion 22 of the retrieval assembly has a plurality of legs 21. The distal portion 24 of the retrieval assembly 15 is pocket shaped having an apex 38 and pocket edges 39 that are joined to the ends 32 of the legs 21 of the proximal basket portion 22. The proximal portion 22 of he retrieval assembly 15 is made with a different material than the distal portion 24 of the retrieval 15 assembly.
The legs 21 of the proximal portion 22 of the retrieval assembly are made with rigid material, such as stainless steel, and are attached at their proximal end to an elongated member 40, and at their distal end 32 to the pocket edges 39 of the pocket in the distal portion 24 of the retrieval assembly. The legs 21 at their distal end 32 are attached to the pocket edges 39 by 2o sutures, adhesives, loops, hooks or any other joining means known to a skilled person.
The poclcet-shaped distal portion 24 of the retrieval assembly 15 is a netting or mesh made with a flexible material such as Nitinol. The openings in the mesh are large enough to permit fluids to pass but small enough to impede movement of material, such as stones larger than O.lmm, through the mesh.
The mesh of the distal portion 24 of the retrieval assembly 15 forms a pocket.
In one embodiment, the apex 3 8 of the pocket in the distal portion 24 is positioned at the distal end 23 of the retrieval assembly 15. In this embodiment, the retrieval assembly is used to "net" or "sweep" material in a body tract. As illustrated in FIGS. 20A-20C, the retrieval device 10 is inserted into a body tract with the retrieval assembly 15 collapsed within the sheath 17 as 3o illustrated in FIG. 20A. When the distal end 18 of the sheath 17 is advanced past a stone 60 or other material to be removed, the retrieval assembly 15 is extended beyond the distal end of the sheath as illustrated in FIG. 20B. With the retrieval assembly 15 positioned beyond the distal end of the sheath, the retrieval assembly 15 is manipulated around the stone 60 to capture the stone 60 in the pocket formed in the distal portion 24 of the retrieval assembly as illustrated in FIG. 20C.
In another embodiment of this aspect of the invention, illustrated in FIGS.
21A-21 C, the apex 38 of the poclcet in the distal portion 24 of the retrieval assembly 15 is located proximal to the ends 32 of the legs 21 of the proximal portion 22 of the retrieval assembly 15. In this embodiment, the pocket of the distal portion 24 of the retrieval assembly is used to "scoop"
stones or other material in the body tract. The medical retrieval device is inserted into a body tract with the retrieval assembly 15 collapsed within the sheath 17 as illustrated in FIG. 21A.
When the distal end 18 of the sheath 17 approaches the stone 60 or other material to be removed, the retrieval assembly 15 is moved to the position illustrated in FIG. 21B.
With the retrieval assembly positioned as shown in FIG. 21B, the retrieval assembly 15 is advanced over the stone 60 capturing the stone 60 in the pocket of the distal portion 24 of the retrieval assembly 15 as illustrated in FIG. 21 C.
Another embodiment of the invention illustrated in FIGS. 19A-19B, 20A-20C, and 21 C, is illustrated in FIGS. 22A and 22B. In this embodiment a second elongated guidewire 41 parallels or passes through an axially disposed lumen of guidewire 40 (see FIGS. 18D-18G for comparison) and is attached distally to the mesh of the distal end portion 24 of the retrieval assembly 15. The proximal end of second guidewire 41 is operatively joined at its proximal end to second actuator 42 in the mamzer illustrated in FIG. 18D. Axial movement of the guidewire 41 proximally causes retrieval assembly 15 to move from the evened position illustrated in FIG.
22A to the inverted position illustrated in FIG. 22B. Thus, with a first actuator 14 operatively attached to guidewire 40, and a second actuator 42 operatively attached to guidewire 41, the medical retrieval assembly 15 of the retrieval device 10 illustrated in FIGS.
19A-19B, 20A-20C, 21A-21 C can be maneuvered to capture material in a body tract as illustrated in FIGS. 18E-18G
and discussed in the corresponding text.
In general, the medical retrieval device according to the invention can be used in a clinical application to retrieve biological or foreign material from within a body. For example, the device can be used to retrieve a stone (e.g., a stone in the gall bladder, biliary tree, ureter, kidney, urinary bladder, urethra, etc.). The device could also be used to capture a thrombus or 3o embolus within a vessel such as the coronary vessels of the hears or within the pulmonary vasculature. Regardless of the material being retrieved, the device 10 with the retrieval assembly 15 enclosed within a sheath 17 is inserted into a body tract. As the distal end 18 of the sheath approaches a stone 60, or passes to one side of a stone 60, the retrieval assembly is moved relative to the sheath 17 and extended beyond the distal end 15 of sheath 17.
The retrieval assembly 15 is maneuvered around the stone 60 to capture the stone 60 within the confines of the retrieval assembly 15 after the stone 60 passes through the gap between the legs 21 of the retrieval assembly 15. The stone 60 may be approached from the side or from the proximal or distal end of the retrieval assembly. The stone 60 is captured in the retrieval assembly 15. The stone 60 is removed from the body tract by withdrawing the entire medical instrument 10 with the retrieval assembly 15 containing the stone 60, from the body tract.
It will be apparent to those slcilled in the art that various modifications and variations can be made to the structure and methodology of the present invention without departing from the to scope or spirit of the invention. In view of the foregoing, it is intended that the present invention cover modifications and variations of this invention provided they fall within the scope of the following claims and their equivalents.
What is claimed is:
Claims (17)
1. A medical instrument, comprising:
a proximal handle;
a sheath extending from the handle and including a lumen, the sheath including a distal end away from the handle; and a retrieval assembly comprising a proximal portion and a distal portion, the proximal portion comprising a first material, the distal portion comprising a second material that is different than the first material, the retrieval assembly and the sheath moveable relative to each other to achieve a collapsed position of the retrieval assembly in which the retrieval assembly is within the lumen of the sheath and another position of the retrieval assembly in which at least a portion of the retrieval assembly extends from the distal end of the sheath and assumes a three-dimensional shape out of the lumen of the sheath.
a proximal handle;
a sheath extending from the handle and including a lumen, the sheath including a distal end away from the handle; and a retrieval assembly comprising a proximal portion and a distal portion, the proximal portion comprising a first material, the distal portion comprising a second material that is different than the first material, the retrieval assembly and the sheath moveable relative to each other to achieve a collapsed position of the retrieval assembly in which the retrieval assembly is within the lumen of the sheath and another position of the retrieval assembly in which at least a portion of the retrieval assembly extends from the distal end of the sheath and assumes a three-dimensional shape out of the lumen of the sheath.
2. The medical instrument of claim 1 wherein the retrieval assembly further comprise a plurality of legs.
3. The medical instrument of claim 2 wherein the retrieval assembly comprises four legs.
4. The medical instrument of claim 2 wherein a leg further comprises a proximal portion and a distal portion.
5. The medical instrument of claim 4 wherein the leg comprises a joint for connecting the proximal portion and the distal portion of the leg.
6. The medical instrument of claim 5 wherein the joint comprises a loop.
7. The medical instrument of claim 5 wherein the joint comprises a hook.
8. The medical instrument of claim 5 wherein the joint comprises a crimp.
9. The medical instrument of claim 1 wherein the second material is more flexible than the first material.
10. The medical instrument of claim 1 wherein the distal portion of the retrieval assembly is more flexible than the proximal portion of the retrieval assembly.
11. The medical instrument of claim 2 wherein the proximal portion of the leg comprises a first material and the distal portion of the leg comprises a second material.
12. The medical instrument of claim 11 wherein the second material is more flexible than the first material.
13. The medical instrument of claim 4 wherein the proximal portion of the retrieval assembly comprises legs wherein the proximal leg portion is straight and the distal leg portion is bulbous.
14. The medical instrument of claim 4 wherein the proximal leg portion is bulbous and the distal leg portion is bulbous.
15. The medical instrument of claim 1 wherein the sheath is moveable.
16. The medical instrument of claim 1 further comprising an elongated member operably attached to a proximal end of the retrieval assembly for moving the retrieval assembly relative to the sheath.
17. A method for retrieving material in a body comprising the steps of:
inserting a medical instrument into a body, the medical instrument including a proximal handle;
a sheath extending from the handle and including a lumen, the sheath including a distal end away from the handle;
a retrieval assembly comprising a proximal portion and a distal portion, the proximal portion comprising a first material, the distal portion comprising a second material that is different than the first material, the retrieval assembly and the sheath moveable relative to each other to achieve a collapsed position of the retrieval assembly in which the retrieval assembly is within the lumen of the sheath and another position of the retrieval assembly in which at least a portion of the retrieval assembly extends from the distal end of the sheath and assumes a three-dimensional shape out of the lumen of the sheath;
capturing material in the retrieval assembly; and withdrawing the retrieval assembly with the captured material from the body.
inserting a medical instrument into a body, the medical instrument including a proximal handle;
a sheath extending from the handle and including a lumen, the sheath including a distal end away from the handle;
a retrieval assembly comprising a proximal portion and a distal portion, the proximal portion comprising a first material, the distal portion comprising a second material that is different than the first material, the retrieval assembly and the sheath moveable relative to each other to achieve a collapsed position of the retrieval assembly in which the retrieval assembly is within the lumen of the sheath and another position of the retrieval assembly in which at least a portion of the retrieval assembly extends from the distal end of the sheath and assumes a three-dimensional shape out of the lumen of the sheath;
capturing material in the retrieval assembly; and withdrawing the retrieval assembly with the captured material from the body.
Applications Claiming Priority (3)
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US09/559,385 | 2000-04-26 | ||
US09/559,385 US6350266B1 (en) | 1995-02-02 | 2000-04-26 | Hybrid stone retrieval device |
PCT/US2001/013065 WO2001080748A2 (en) | 2000-04-26 | 2001-04-23 | Hybrid stone retrieval device |
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CA2403626A1 true CA2403626A1 (en) | 2001-11-01 |
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CA002403626A Abandoned CA2403626A1 (en) | 2000-04-26 | 2001-04-23 | Hybrid stone retrieval device |
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EP (1) | EP1278464B1 (en) |
JP (1) | JP4732665B2 (en) |
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CA (1) | CA2403626A1 (en) |
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WO (1) | WO2001080748A2 (en) |
Families Citing this family (195)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6206934B1 (en) * | 1998-04-10 | 2001-03-27 | Flex-Foot, Inc. | Ankle block with spring inserts |
US6350266B1 (en) * | 1995-02-02 | 2002-02-26 | Scimed Life Systems, Inc. | Hybrid stone retrieval device |
US6099534A (en) * | 1997-10-01 | 2000-08-08 | Scimed Life Systems, Inc. | Releasable basket |
US7169154B1 (en) * | 1999-05-25 | 2007-01-30 | Scimedlife Systems, Inc. | Releasable basket and method of making thereof |
ITCE990004A1 (en) * | 1999-10-25 | 2000-01-25 | Mario Immacolato Paternuosto | VALVE FOR BIOPSY FORCEPS IN DIGESTIVE ENDOSCOPY |
JP3758962B2 (en) * | 2000-10-11 | 2006-03-22 | ペンタックス株式会社 | Endoscope basket-type collection tool |
DE60207799T2 (en) * | 2001-01-08 | 2006-08-31 | Boston Scientific Ltd., St. Michael | FENCING BASKET WITH SOLVABLE END PIECE |
US7101379B2 (en) | 2001-04-02 | 2006-09-05 | Acmi Corporation | Retrieval basket for a surgical device and system and method for manufacturing same |
ATE372729T1 (en) * | 2001-06-28 | 2007-09-15 | Lithotech Medical Ltd | DEVICE FOR CATCHING FOREIGN BODY |
JP4567918B2 (en) * | 2001-07-02 | 2010-10-27 | テルモ株式会社 | Intravascular foreign matter removal wire and medical device |
US8021372B2 (en) | 2001-07-05 | 2011-09-20 | Annex Medical, Inc. | Medical retrieval device with independent rotational means |
US6676668B2 (en) * | 2001-12-12 | 2004-01-13 | C.R. Baed | Articulating stone basket |
US20030176884A1 (en) | 2002-03-12 | 2003-09-18 | Marwane Berrada | Everted filter device |
US7029440B2 (en) * | 2002-03-13 | 2006-04-18 | Scimed Life Systems, Inc. | Distal protection filter and method of manufacture |
AU2003259784A1 (en) * | 2002-08-13 | 2004-02-25 | Cook Ireland Ltd. | Ercp catheter with a removable handle for lithotriptor compatible basket |
DE10242444A1 (en) * | 2002-09-11 | 2004-04-01 | pfm Produkte für die Medizin AG | extractor |
CA2500853A1 (en) * | 2002-10-04 | 2004-04-22 | Cook Urological, Incorporated | Rigid extractor with wire basket |
US8043303B2 (en) * | 2002-10-04 | 2011-10-25 | Cook Medical Technologies Llc | Handle for interchangeable medical device |
US7374564B2 (en) * | 2002-10-08 | 2008-05-20 | Brown Joe D | Apparatus and method for causing deflection of a surgical instrument |
US7211089B2 (en) * | 2002-10-18 | 2007-05-01 | Scimed Life Systems, Inc. | Medical retrieval device |
US7678119B2 (en) * | 2003-01-15 | 2010-03-16 | Scimed Life Systems, Inc. | Medical retrieval device with frangible basket |
US7534251B2 (en) * | 2003-02-11 | 2009-05-19 | Boston Scientific Scimed, Inc. | Retrievable IVC filter |
US8052694B2 (en) * | 2003-03-19 | 2011-11-08 | Boston Scientific Scimed, Inc. | Device for manipulating material in a tissue |
US7322989B2 (en) * | 2003-04-24 | 2008-01-29 | Boston Scientific Scimed, Inc. | Retractable grasper |
US9101383B1 (en) | 2003-04-25 | 2015-08-11 | Annex Medical, Inc. | Medical retrieval device |
WO2005000130A1 (en) * | 2003-06-11 | 2005-01-06 | Concentric Medical, Inc. | Systems, methods and devices for removing obstructions from a blood vessel |
US7731722B2 (en) * | 2003-07-31 | 2010-06-08 | Vance Products Incorporated | Ureteral backstop filter and retrieval device |
US7588545B2 (en) | 2003-09-10 | 2009-09-15 | Boston Scientific Scimed, Inc. | Forceps and collection assembly with accompanying mechanisms and related methods of use |
US7377925B2 (en) * | 2003-09-16 | 2008-05-27 | Minimally Invasive Devices, Llc | Fragmentation and extraction basket |
US8388630B2 (en) * | 2003-09-18 | 2013-03-05 | Boston Scientific Scimed, Inc. | Medical retrieval devices and methods |
US7727227B2 (en) * | 2003-09-18 | 2010-06-01 | Boston Scientific Scimed, Inc. | Medical retrieval devices with laser and retrieval assembly |
US7942896B2 (en) * | 2003-11-25 | 2011-05-17 | Scimed Life Systems, Inc. | Forceps and collection assembly and related methods of use and manufacture |
WO2005084564A1 (en) * | 2004-02-27 | 2005-09-15 | Cook Urological Incorporated | Self-tensioning handle for endoscopic device |
US8211115B2 (en) * | 2004-05-06 | 2012-07-03 | Boston Scientific Scimed, Inc. | Variable size retrieval basket |
US8366735B2 (en) * | 2004-09-10 | 2013-02-05 | Penumbra, Inc. | System and method for treating ischemic stroke |
US9655633B2 (en) | 2004-09-10 | 2017-05-23 | Penumbra, Inc. | System and method for treating ischemic stroke |
US20060058837A1 (en) * | 2004-09-10 | 2006-03-16 | Arani Bose | System and method for treating ischemic stroke |
WO2006042114A1 (en) | 2004-10-06 | 2006-04-20 | Cook, Inc. | Emboli capturing device having a coil and method for capturing emboli |
US8109941B2 (en) * | 2005-02-28 | 2012-02-07 | Boston Scientific Scimed, Inc. | Distal release retrieval assembly and related methods of use |
US20060200170A1 (en) * | 2005-03-07 | 2006-09-07 | Ernest Aranyi | Specimen retrieval apparatus and method of use |
US20060200169A1 (en) * | 2005-03-07 | 2006-09-07 | Kevin Sniffin | Specimen retrieval apparatus and method of use |
US8945169B2 (en) * | 2005-03-15 | 2015-02-03 | Cook Medical Technologies Llc | Embolic protection device |
US7547310B2 (en) * | 2005-03-29 | 2009-06-16 | Tyco Healthcare Group Lp | Specimen retrieval apparatus |
US7670346B2 (en) * | 2005-03-29 | 2010-03-02 | Tyco Healthcare Group Lp | Specimen retrieval apparatus |
US8523879B1 (en) | 2005-03-31 | 2013-09-03 | Stuart J. Lind | Stone retriever for flexible endoscopes having small diameter working channels |
US20060247663A1 (en) * | 2005-04-27 | 2006-11-02 | Southern Illinois University Office Of Research, Development And Administration | Laser resistant calculus retrieval device and method of using |
US7914540B2 (en) * | 2005-04-27 | 2011-03-29 | Board Of Trustees Of Southern Illinois University | Material retrieval device and method of using |
US7762960B2 (en) | 2005-05-13 | 2010-07-27 | Boston Scientific Scimed, Inc. | Biopsy forceps assemblies |
US20060270806A1 (en) * | 2005-05-26 | 2006-11-30 | Hale Wesley R | Miscible high Tg polyester/polymer blend compositions and films formed therefrom |
JP4926055B2 (en) * | 2005-06-20 | 2012-05-09 | テルモ株式会社 | Intravascular foreign matter removal wire and medical device |
US8206401B2 (en) * | 2005-07-15 | 2012-06-26 | Granit Medical Innovation Llc | Endoscope cutting and retrieving snare instrument |
US8187298B2 (en) | 2005-08-04 | 2012-05-29 | Cook Medical Technologies Llc | Embolic protection device having inflatable frame |
US8377092B2 (en) * | 2005-09-16 | 2013-02-19 | Cook Medical Technologies Llc | Embolic protection device |
US8632562B2 (en) | 2005-10-03 | 2014-01-21 | Cook Medical Technologies Llc | Embolic protection device |
US8182508B2 (en) | 2005-10-04 | 2012-05-22 | Cook Medical Technologies Llc | Embolic protection device |
US8252017B2 (en) | 2005-10-18 | 2012-08-28 | Cook Medical Technologies Llc | Invertible filter for embolic protection |
US7463499B2 (en) * | 2005-10-31 | 2008-12-09 | Avago Technologies General Ip (Singapore) Pte Ltd. | AC-DC power converter |
US8216269B2 (en) * | 2005-11-02 | 2012-07-10 | Cook Medical Technologies Llc | Embolic protection device having reduced profile |
US8597303B2 (en) * | 2005-11-03 | 2013-12-03 | Cook Medical Technologies Llc | Articulating basket with simultaneous basket extension or basket retraction |
US8152831B2 (en) | 2005-11-17 | 2012-04-10 | Cook Medical Technologies Llc | Foam embolic protection device |
WO2007092820A2 (en) | 2006-02-03 | 2007-08-16 | Lazarus Effect, Inc. | Methods and devices for restoring blood flow within blocked vasculature |
US20070225730A1 (en) * | 2006-03-21 | 2007-09-27 | Travis Deal | Iris basket |
US8361084B2 (en) * | 2006-09-01 | 2013-01-29 | Boston Scientific Scimed, Inc. | Medical retrieval baskets |
US20080071307A1 (en) | 2006-09-19 | 2008-03-20 | Cook Incorporated | Apparatus and methods for in situ embolic protection |
US9901434B2 (en) * | 2007-02-27 | 2018-02-27 | Cook Medical Technologies Llc | Embolic protection device including a Z-stent waist band |
US20080221587A1 (en) * | 2007-03-09 | 2008-09-11 | Jeremy Schwartz | Two-stage snare-basket medical device |
US10076346B2 (en) | 2007-04-17 | 2018-09-18 | Covidien Lp | Complex wire formed devices |
US11202646B2 (en) | 2007-04-17 | 2021-12-21 | Covidien Lp | Articulating retrieval devices |
US10064635B2 (en) * | 2007-04-17 | 2018-09-04 | Covidien Lp | Articulating retrieval devices |
US8535334B2 (en) * | 2007-04-17 | 2013-09-17 | Lazarus Effect, Inc. | Complex wire formed devices |
US9138307B2 (en) | 2007-09-14 | 2015-09-22 | Cook Medical Technologies Llc | Expandable device for treatment of a stricture in a body vessel |
US8328819B2 (en) * | 2007-10-22 | 2012-12-11 | Boston Scientific Scimed, Inc. | Steerable stone basket |
IL188067A (en) | 2007-12-12 | 2011-12-29 | Lithotech Medical Ltd | Device for fragmenting and removing concretions from body ducts and cavities |
WO2009079506A1 (en) * | 2007-12-17 | 2009-06-25 | Boston Scientific Scimed, Inc. | Retrieval device |
WO2009086482A1 (en) | 2007-12-26 | 2009-07-09 | Lazarus Effect, Inc. | Retrieval systems and methods for use thereof |
JP5770087B2 (en) * | 2008-07-25 | 2015-08-26 | スパイン ビュー, インコーポレイテッド | System and method for cable-based debridement |
DE202009019000U1 (en) * | 2008-09-04 | 2015-04-29 | Swat Medical Ab | Foldable temporary device for embolic protection during medical procedures |
US9370341B2 (en) * | 2008-10-23 | 2016-06-21 | Covidien Lp | Surgical retrieval apparatus |
EP2355717B1 (en) * | 2008-12-01 | 2014-02-19 | Percutaneous Systems, Inc. | Systems for capturing and removing urinary stones from body cavities |
US8388644B2 (en) | 2008-12-29 | 2013-03-05 | Cook Medical Technologies Llc | Embolic protection device and method of use |
US20100204672A1 (en) * | 2009-02-12 | 2010-08-12 | Penumra, Inc. | System and method for treating ischemic stroke |
WO2010102307A1 (en) | 2009-03-06 | 2010-09-10 | Lazarus Effect, Inc. | Retrieval systems and methods for use thereof |
WO2011091383A1 (en) | 2010-01-22 | 2011-07-28 | Lazarus Effect, Inc. | Retrieval systems and methods for use thereof |
US9113848B2 (en) * | 2010-02-03 | 2015-08-25 | Covidien Lp | Surgical retrieval apparatus |
US8585712B2 (en) | 2010-02-03 | 2013-11-19 | Covidien Lp | Surgical retrieval apparatus |
US20110190781A1 (en) * | 2010-02-03 | 2011-08-04 | Nicholas John Collier | Surgical retrieval apparatus |
US8486087B2 (en) | 2010-05-03 | 2013-07-16 | Covidien Lp | System and method for removing excised tissue |
US9247942B2 (en) | 2010-06-29 | 2016-02-02 | Artventive Medical Group, Inc. | Reversible tubal contraceptive device |
EP2588042A4 (en) | 2010-06-29 | 2015-03-18 | Artventive Medical Group Inc | Reducing flow through a tubular structure |
WO2012009675A2 (en) | 2010-07-15 | 2012-01-19 | Lazarus Effect, Inc. | Retrieval systems and methods for use thereof |
US8777961B2 (en) | 2010-10-04 | 2014-07-15 | Covidien Lp | Surgical retrieval apparatus |
US9005215B2 (en) | 2010-10-04 | 2015-04-14 | Covidien Lp | Specimen retrieval apparatus |
US9149277B2 (en) | 2010-10-18 | 2015-10-06 | Artventive Medical Group, Inc. | Expandable device delivery |
US8579914B2 (en) | 2010-12-17 | 2013-11-12 | Covidien Lp | Specimen retrieval device |
US8734464B2 (en) | 2011-01-06 | 2014-05-27 | Covidien Lp | Surgical retrieval apparatus for thoracic procedures |
US8795291B2 (en) | 2011-04-29 | 2014-08-05 | Covidien Lp | Specimen retrieval device |
BR112013030183A2 (en) | 2011-05-23 | 2017-12-05 | Lazarus Effect Inc | interventional medical device for recovering and securing an obstruction within a vessel lumen, method of securing an obstruction within a vessel, method of preparing a retrieval device, medical device retrieval system, for securing an obstruction within a lumen and for use with a catheter configured to be navigated through the vasculature, interventional medical device to secure a retrieval device having one or more obstructions located therein for removal of a body and stent retrieval device to expand against one or more occlusive bodies in a vasculature |
FR2979224B1 (en) * | 2011-08-29 | 2014-03-07 | Newco | SYSTEM FOR EXTRACTING THE THROMBOEMBOLIC SUBSTANCE LOCATED IN A BLOOD VESSEL |
US8968329B2 (en) | 2011-10-19 | 2015-03-03 | Covidien Lp | Surgical retrieval apparatus for thoracic procedures |
US9993229B2 (en) | 2011-11-08 | 2018-06-12 | Covidien Lp | Specimen retrieval device |
US8906036B2 (en) | 2011-11-21 | 2014-12-09 | Covidien Lp | Surgical retrieval apparatus |
US9549747B2 (en) | 2012-01-23 | 2017-01-24 | Covidien Lp | Reusable surgical retrieval apparatus with disposable cartridge assembly |
US9186238B2 (en) * | 2013-01-29 | 2015-11-17 | St. Jude Medical, Cardiology Division, Inc. | Aortic great vessel protection |
US9095344B2 (en) | 2013-02-05 | 2015-08-04 | Artventive Medical Group, Inc. | Methods and apparatuses for blood vessel occlusion |
US8984733B2 (en) | 2013-02-05 | 2015-03-24 | Artventive Medical Group, Inc. | Bodily lumen occlusion |
EP2996569A4 (en) | 2013-03-01 | 2017-05-03 | Covidien LP | Specimen retrieval device with pouch stop |
US10219864B2 (en) | 2013-04-16 | 2019-03-05 | Calcula Technologies, Inc. | Basket and everting balloon with simplified design and control |
US10188411B2 (en) | 2013-04-16 | 2019-01-29 | Calcula Technologies, Inc. | Everting balloon for medical devices |
US8974472B2 (en) | 2013-04-16 | 2015-03-10 | Calcula Technologies, Inc. | Method for removing kidney stones |
US9636116B2 (en) | 2013-06-14 | 2017-05-02 | Artventive Medical Group, Inc. | Implantable luminal devices |
US9737306B2 (en) | 2013-06-14 | 2017-08-22 | Artventive Medical Group, Inc. | Implantable luminal devices |
US9737308B2 (en) | 2013-06-14 | 2017-08-22 | Artventive Medical Group, Inc. | Catheter-assisted tumor treatment |
US9987031B2 (en) | 2013-06-14 | 2018-06-05 | Covidien Lp | Specimen retrieval device including an integrated sliding grasper |
US9592067B2 (en) | 2013-06-14 | 2017-03-14 | Covidien Lp | Specimen retrieval device including a reusable shaft with interchangeable pouch |
US10149968B2 (en) | 2013-06-14 | 2018-12-11 | Artventive Medical Group, Inc. | Catheter-assisted tumor treatment |
JP2015009003A (en) * | 2013-06-30 | 2015-01-19 | 株式会社リバーセイコー | Basket holding device |
JP6009077B2 (en) * | 2013-07-02 | 2016-10-19 | 株式会社パイオラックスメディカルデバイス | Foreign body capture device in body cavity |
CN109394308B (en) | 2013-08-23 | 2021-08-20 | 柯惠Lp公司 | Specimen retrieval device |
US9795401B2 (en) * | 2013-11-27 | 2017-10-24 | Boston Scientific Scimed, Inc. | Medical retrieval devices and related methods of use |
US9173668B2 (en) | 2014-01-03 | 2015-11-03 | Legacy Ventures LLC | Clot retrieval system |
WO2015103547A1 (en) * | 2014-01-03 | 2015-07-09 | Legacy Ventures LLC | Clot retrieval system |
US9974553B2 (en) * | 2014-01-03 | 2018-05-22 | Boston Scientific Scimed, Inc. | Electrosurgery devices and methods for providing electric energy treatment |
AT515317B1 (en) * | 2014-02-05 | 2015-08-15 | Tosun Kadir Dr | Endoscopic cutting device |
CN106231999B (en) | 2014-04-21 | 2020-01-21 | 皇家飞利浦有限公司 | Intravascular devices, systems, and methods having separate sections with engaged core components |
DE102014208168A1 (en) * | 2014-04-30 | 2015-11-19 | Epflex Feinwerktechnik Gmbh | Fangkelinstrument with distal Fangkelchstruktur |
US10363043B2 (en) | 2014-05-01 | 2019-07-30 | Artventive Medical Group, Inc. | Treatment of incompetent vessels |
US10888346B2 (en) | 2014-05-18 | 2021-01-12 | Legacy Ventures LLC | Clot retrieval system |
US10117661B2 (en) | 2014-05-30 | 2018-11-06 | Cook Medical Technologies Llc | Stone extracting medical device with better stone retention |
US9655634B2 (en) * | 2014-06-12 | 2017-05-23 | Innon Holdings, Llc | Endoscopic stone-extraction device |
US10448962B2 (en) | 2014-06-12 | 2019-10-22 | Innon Holdings, Llc | Endoscopic stone-extraction device |
US10363399B2 (en) | 2014-09-30 | 2019-07-30 | Boston Scientific Scimed, Inc. | Dual-layer balloon design and method of making the same |
CN106535789B (en) | 2014-10-07 | 2019-10-11 | 奥林巴斯株式会社 | Stone basket type holds pliers |
US10463351B2 (en) * | 2014-10-15 | 2019-11-05 | Cook Medical Technologies Llc | Transitional geometry for an expandable medical device |
JP6460742B2 (en) * | 2014-11-21 | 2019-01-30 | テルモ株式会社 | Medical device |
CN104434260A (en) * | 2014-12-31 | 2015-03-25 | 东莞市南城医院 | Safety type scaleplate guiding percutaneous liver and kidney calculus operation sheath |
CN107405470A (en) | 2015-02-11 | 2017-11-28 | 柯惠有限合伙公司 | With expansible sophisticated medical treatment device and method |
US10813644B2 (en) | 2016-04-01 | 2020-10-27 | Artventive Medical Group, Inc. | Occlusive implant and delivery system |
JP6806791B2 (en) * | 2016-04-19 | 2021-01-06 | ジャイラス・エーシーエムアイ・インコーポレーテッド | Medical extraction device |
US10667832B2 (en) | 2016-08-10 | 2020-06-02 | Boston Scientific Scimed, Inc. | Medical retrieval devices and related methods |
US10675058B2 (en) | 2017-01-19 | 2020-06-09 | Covidien Lp | Devices, systems, and methods for large tissue specimen removal |
US9743944B1 (en) | 2017-04-24 | 2017-08-29 | Calcula Technologies, Inc. | Stone retrieval balloon catheter |
US11191555B2 (en) | 2017-05-12 | 2021-12-07 | Covidien Lp | Retrieval of material from vessel lumens |
US10709464B2 (en) | 2017-05-12 | 2020-07-14 | Covidien Lp | Retrieval of material from vessel lumens |
US11129630B2 (en) | 2017-05-12 | 2021-09-28 | Covidien Lp | Retrieval of material from vessel lumens |
US11298145B2 (en) | 2017-05-12 | 2022-04-12 | Covidien Lp | Retrieval of material from vessel lumens |
US10722257B2 (en) | 2017-05-12 | 2020-07-28 | Covidien Lp | Retrieval of material from vessel lumens |
EP3638134B1 (en) | 2017-06-12 | 2023-08-16 | Covidien LP | Tools for sheathing treatment devices and associated systems |
US10478322B2 (en) | 2017-06-19 | 2019-11-19 | Covidien Lp | Retractor device for transforming a retrieval device from a deployed position to a delivery position |
US10575864B2 (en) | 2017-06-22 | 2020-03-03 | Covidien Lp | Securing element for resheathing an intravascular device and associated systems and methods |
US10653400B2 (en) | 2017-08-07 | 2020-05-19 | Covidien Lp | Specimen retrieval device |
US11083490B2 (en) | 2017-09-21 | 2021-08-10 | Covidien Lp | Systems and methods for large tissue specimen removal |
JP7078376B2 (en) | 2017-10-18 | 2022-05-31 | テルモ株式会社 | Recovery device |
US11065051B2 (en) | 2017-11-03 | 2021-07-20 | Covidien Lp | Specimen retrieval device |
US10973543B2 (en) | 2018-01-10 | 2021-04-13 | Covidien Lp | Dual wall tissue extraction bag |
US10874386B2 (en) | 2018-01-24 | 2020-12-29 | Covidien Lp | Specimen retrieval device |
US11730459B2 (en) | 2018-02-22 | 2023-08-22 | Covidien Lp | Specimen retrieval devices and methods |
US10792057B2 (en) | 2018-03-23 | 2020-10-06 | Covidien Lp | Articulation mechanisms for tissue specimen retrieval devices and tissue specimen retrieval devices incorporating the same |
US11083443B2 (en) | 2018-04-24 | 2021-08-10 | Covidien Lp | Specimen retrieval device |
US10667800B2 (en) | 2018-05-08 | 2020-06-02 | Covidien Lp | Four bar articulation mechanism for tissue specimen retrieval device |
US11045176B2 (en) | 2018-05-18 | 2021-06-29 | Covidien Lp | Specimen retrieval device |
US10792023B2 (en) | 2018-06-06 | 2020-10-06 | Covidien Lp | Shaft driven mechanism for articulating tissue specimen retrieval device |
US11134932B2 (en) | 2018-08-13 | 2021-10-05 | Covidien Lp | Specimen retrieval device |
US11730480B2 (en) | 2018-09-14 | 2023-08-22 | Covidien Lp | Method and apparatus for accessing matter disposed within an internal body vessel |
US11191559B2 (en) | 2018-09-19 | 2021-12-07 | Covidien Lp | Specimen retrieval device |
US20220061864A1 (en) * | 2018-12-27 | 2022-03-03 | C. R. Bard, Inc. | Extraction basket |
WO2020146364A1 (en) * | 2019-01-07 | 2020-07-16 | Legacy Ventures LLC | Clot retrieval system |
USD943743S1 (en) * | 2019-01-15 | 2022-02-15 | Olympus Corporation | Stone retrieval basket for medical device |
US10912545B2 (en) | 2019-02-04 | 2021-02-09 | Covidien Lp | Tissue specimen retrieval devices and methods |
US11344300B2 (en) | 2019-03-26 | 2022-05-31 | Covidien Lp | Specimen capture stapler |
US11172915B2 (en) | 2019-04-24 | 2021-11-16 | Covidien Lp | Specimen retrieval devices with selective bag release |
US11064984B2 (en) | 2019-05-07 | 2021-07-20 | Covidien Lp | Specimen containment device |
US11246578B2 (en) | 2019-05-15 | 2022-02-15 | Covidien Lp | Tissue collection bags with inner surface pouches |
US11051834B2 (en) | 2019-05-17 | 2021-07-06 | Covidien Lp | Tissue specimen retrieval device |
US11426203B2 (en) | 2019-05-23 | 2022-08-30 | Covidien Lp | Tissue guards and systems incorporating the same for tissue specimen removal procedures and other surgical procedures |
US11426151B2 (en) | 2019-06-04 | 2022-08-30 | Covidien Lp | Bag closure for specimen retrieval device |
US11051795B2 (en) | 2019-07-31 | 2021-07-06 | Covidien Lp | Tissue retrieval bag |
US11304687B2 (en) | 2019-08-13 | 2022-04-19 | Covidien Lp | Tissue specimen bag furling device and method |
US11253240B2 (en) | 2019-09-10 | 2022-02-22 | Covidien Lp | Tissue specimen retrieval devices |
US11172949B2 (en) | 2019-10-07 | 2021-11-16 | Covidien Lp | Tissue specimen retrieval devices |
US11446015B2 (en) | 2019-10-30 | 2022-09-20 | Covidien Lp | Specimen retrieval bag |
US11707264B2 (en) | 2020-01-30 | 2023-07-25 | Covidien Lp | Rollable tissue specimen bag with improved brim for tenting |
US11759188B2 (en) | 2020-01-31 | 2023-09-19 | Covidien Lp | Devices, systems, and methods for specimen removal |
US11344284B2 (en) | 2020-02-11 | 2022-05-31 | Covidien Lp | Tissue specimen retrieval device with variable bag brim |
US11160543B2 (en) | 2020-02-13 | 2021-11-02 | Covidien Lp | Magnetic suture tab for free standing specimen bag |
US11224413B2 (en) | 2020-02-19 | 2022-01-18 | Covidien Lp | Retrieval device with bag release mechanism |
US11369352B2 (en) | 2020-03-31 | 2022-06-28 | Covidien Lp | Dual channel design for free standing specimen bag |
US11406369B2 (en) | 2020-04-08 | 2022-08-09 | Covidien Lp | Tissue specimen retrieval device with reinforced spring |
US11246613B2 (en) | 2020-05-15 | 2022-02-15 | Covidien Lp | Actuation mechanisms for tissue specimen retrieval devices and tissue specimen retrieval devices incorporating the same |
US11304714B2 (en) | 2020-05-19 | 2022-04-19 | Covidien Lp | Tissue specimen retrieval device with assisted deployment |
US11627987B2 (en) | 2020-05-20 | 2023-04-18 | Covidien Lp | Low impact cutting guard |
US11510749B2 (en) | 2020-05-26 | 2022-11-29 | Covidien Lp | Insertable cutting guard |
US11517297B2 (en) | 2020-06-05 | 2022-12-06 | Covidien Lp | Rollable tissue specimen bag with improved brim for tenting |
US11931067B2 (en) | 2020-08-15 | 2024-03-19 | Covidien Lp | Insertable cutting guards |
RU203393U1 (en) * | 2020-09-22 | 2021-04-02 | Государственное бюджетное учреждение здравоохранения города Москвы «Научно-исследовательский институт скорой помощи им. Н.В. Склифосовского Департамента здравоохранения города Москвы» (ГБУЗ "НИИ СП ИМ. Н.В. СКЛИФОСОВСКОГО ДЗМ") | DEVICE FOR REMOVING FOREIGN BODIES FROM GALLERY |
RU205366U1 (en) * | 2021-04-20 | 2021-07-12 | Государственное бюджетное учреждение здравоохранения города Москвы «Научно-исследовательский институт скорой помощи им. Н.В. Склифосовского Департамента здравоохранения города Москвы» (ГБУЗ "НИИ СП ИМ. Н.В. СКЛИФОСОВСКОГО ДЗМ") | DEVICE FOR REMOVAL OF CONCRETE FROM GALLERY |
Family Cites Families (91)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1677671A (en) | 1926-07-02 | 1928-07-17 | Wilford A Councill | Ureteral stone extractor and dilator |
US2556783A (en) | 1950-05-16 | 1951-06-12 | American Cystoscope Makers Inc | Surgical forceps |
US2943626A (en) | 1957-01-31 | 1960-07-05 | Dormia Enrico | Instruments for the extraction of foreign bodies |
US3008467A (en) | 1957-09-30 | 1961-11-14 | William E Morris | Kidney stone extracting machine |
US3108593A (en) | 1961-03-13 | 1963-10-29 | Jacob A Glassman | Surgical extractor |
US3137298A (en) | 1963-06-25 | 1964-06-16 | Jacob A Glassman | Surgical extractors |
US3472230A (en) | 1966-12-19 | 1969-10-14 | Fogarty T J | Umbrella catheter |
DE2160466A1 (en) | 1970-12-05 | 1972-06-22 | Olympus Optical Co. Ltd., Tokio | Excision forceps |
US3922378A (en) | 1972-08-04 | 1975-11-25 | Medical Evaluation Devices & I | Fluorinated hydrocarbon coating method |
FR2275187A1 (en) | 1974-06-20 | 1976-01-16 | Leveen Harry | Gallstone extracting and locating device - has wire spiral at end of rod expanded and passed around stone |
US5259570A (en) | 1974-08-12 | 1993-11-09 | The United States Of America As Represented By The Secretary Of The Navy | Laser resistant optical detector arrangement |
US4046149A (en) * | 1975-01-31 | 1977-09-06 | Olympus Optical Co., Ltd. | Instrument for removing a foreign substance from the body cavity of human being |
US4046150A (en) | 1975-07-17 | 1977-09-06 | American Hospital Supply Corporation | Medical instrument for locating and removing occlusive objects |
JPS5330875A (en) | 1976-09-03 | 1978-03-23 | Toshiba Corp | Production of semiconductor device |
JPS5394515A (en) | 1977-01-31 | 1978-08-18 | Kubota Ltd | Method of producing glass fiber reinforced cement plate |
US4299225A (en) | 1979-04-26 | 1981-11-10 | The Southeastern Research Foundation | Surgical extracter |
IT1126526B (en) | 1979-12-07 | 1986-05-21 | Enrico Dormia | SURGICAL EXTRACTOR TO REMOVE FOREIGN BODIES THAT ARE FOUND IN THE NATURAL ROUTES OF THE HUMAN BODY, AS CALCULATIONS AND SIMILAR |
SU1036325A2 (en) | 1981-05-19 | 1983-08-23 | Zaslavskij Isaak M | Extractor for extracting stones from ureter |
US4489722A (en) | 1982-09-27 | 1984-12-25 | Medical Engineering Corporation | Laser resistant endotracheal tube |
US4655219A (en) | 1983-07-22 | 1987-04-07 | American Hospital Supply Corporation | Multicomponent flexible grasping device |
US4557255A (en) | 1983-08-22 | 1985-12-10 | Goodman Tobias M | Ureteroscope |
EP0152032B1 (en) | 1984-02-03 | 1988-10-26 | Olympus Optical Co., Ltd. | Calculus crushing apparatus |
US5196228A (en) | 1984-02-17 | 1993-03-23 | Mcdonnell Douglas Corporation | Laser resistant elastomer composition and use in coating process |
US4611594A (en) * | 1984-04-11 | 1986-09-16 | Northwestern University | Medical instrument for containment and removal of calculi |
US4590938A (en) | 1984-05-04 | 1986-05-27 | Segura Joseph W | Medical retriever device |
JPH0698143B2 (en) | 1984-06-18 | 1994-12-07 | オリンパス光学工業株式会社 | Tool for collecting foreign matter in body cavity |
IT1176442B (en) | 1984-07-20 | 1987-08-18 | Enrico Dormia | INSTRUMENT FOR THE EXTRACTION OF FOREIGN BODIES FROM THE BODY'S PHYSIOLOGICAL CHANNELS |
US4625726A (en) | 1984-08-07 | 1986-12-02 | Duthoy Everette J | Kidney stone retriever |
US4807626A (en) | 1985-02-14 | 1989-02-28 | Mcgirr Douglas B | Stone extractor and method |
JPS61215255A (en) * | 1985-03-18 | 1986-09-25 | 京セラ株式会社 | Dielectric ceramic composition |
US4790812A (en) | 1985-11-15 | 1988-12-13 | Hawkins Jr Irvin F | Apparatus and method for removing a target object from a body passsageway |
JPS62166813U (en) | 1986-04-11 | 1987-10-23 | ||
DE3633527A1 (en) | 1986-10-02 | 1988-04-14 | Juergen Hochberger | Instruments for crushing concrements in hollow organs |
US5040531A (en) | 1987-02-02 | 1991-08-20 | Mallinckrodt Medical, Inc. | Laser resistant ventilating device |
US4953548A (en) | 1987-02-02 | 1990-09-04 | Mallinckrodt, Inc. | Laser resistant ventilating device with locking ferrule |
US4785807B1 (en) | 1987-02-24 | 1996-07-16 | American Medical Products Inc | Electrosurgical knife |
US4816339A (en) | 1987-04-28 | 1989-03-28 | Baxter International Inc. | Multi-layered poly(tetrafluoroethylene)/elastomer materials useful for in vivo implantation |
JPH052166Y2 (en) * | 1987-07-10 | 1993-01-20 | ||
US5274074A (en) | 1987-12-17 | 1993-12-28 | United States Surgical Corporation | Medical devices fabricated from homopolymers and copolymers having recurring carbonate units |
US5269751A (en) * | 1988-09-21 | 1993-12-14 | Josef Kaliman | Thrombectomy catheter for enlarging an artery |
US4927426A (en) | 1989-01-03 | 1990-05-22 | Dretler Stephen P | Catheter device |
US5059199A (en) * | 1989-04-12 | 1991-10-22 | Olympus Optical Co., Ltd. | Treating device for endoscopes |
US5190810A (en) | 1989-09-11 | 1993-03-02 | Warren Kirschbaum | Composite for use in making protective articles for use in laser surgery |
US5103816A (en) | 1989-09-11 | 1992-04-14 | Biomedical Device Consultants, Inc. | Composite for use in making protective articles for use in laser surgery |
US4997435A (en) | 1989-09-25 | 1991-03-05 | Methodist Hospital Of Indiana Inc. | Percutaneous catheter with encapsulating receptacle |
JP2997484B2 (en) | 1989-10-17 | 2000-01-11 | オリンパス光学工業株式会社 | Endoscope treatment tool |
US5030201A (en) | 1989-11-24 | 1991-07-09 | Aubrey Palestrant | Expandable atherectomy catheter device |
US5074867A (en) | 1990-05-18 | 1991-12-24 | Wilk Peter J | Surgical instrument assembly and related surgical method |
DE4025799A1 (en) | 1990-08-15 | 1992-02-20 | Angiomed Ag | Appts. for atherectomy - has rotatable part for removal of deposits, occlusions or similar from vasi, and adjustable between two positions |
US5057114A (en) | 1990-09-18 | 1991-10-15 | Cook Incorporated | Medical retrieval basket |
US5064428A (en) | 1990-09-18 | 1991-11-12 | Cook Incorporated | Medical retrieval basket |
CA2093821A1 (en) | 1990-10-09 | 1992-04-10 | Walter R. Pyka | Device or apparatus for manipulating matter |
RU2003291C1 (en) | 1991-03-19 | 1993-11-30 | Владимир Николаевич Хачин | Apparatus for removing concrements from hollow organs |
EP0590050B1 (en) * | 1991-06-17 | 1999-03-03 | Wilson-Cook Medical Inc. | Endoscopic extraction device having composite wire construction |
US5147371A (en) | 1991-06-28 | 1992-09-15 | Washington Charles N | Apparatus for removing gallstones and tissue during surgery |
US5176688A (en) | 1991-07-17 | 1993-01-05 | Perinchery Narayan | Stone extractor and method |
US5192286A (en) | 1991-07-26 | 1993-03-09 | Regents Of The University Of California | Method and device for retrieving materials from body lumens |
US5190557A (en) | 1991-10-03 | 1993-03-02 | Urological Instrument Research, Inc. | Vibratory method and instrument for extracting stones from urinary tract |
US5201740A (en) | 1991-11-05 | 1993-04-13 | Nakao Naomi L | Surgical retrieval assembly and related method |
US5190542A (en) | 1991-11-05 | 1993-03-02 | Nakao Naomi L | Surgical retrieval assembly and related method |
RU2022528C1 (en) | 1992-02-07 | 1994-11-15 | Александр Федорович Возианов | Device for extracting urethral calculi |
DE4214148C1 (en) * | 1992-04-29 | 1993-07-08 | Richard Wolf Gmbh, 7134 Knittlingen, De | |
US5311863A (en) | 1992-06-12 | 1994-05-17 | Sheridan Catheter Corp. | Laser resistant endotracheal tube, tape, material and article |
DE4220295A1 (en) * | 1992-06-20 | 1993-12-23 | Angiomed Ag | Device for correcting the position of a stent |
DE69433774T2 (en) | 1993-02-19 | 2005-04-14 | Boston Scientific Corp., Natick | SURGICAL EXTRACTOR |
US5562619A (en) | 1993-08-19 | 1996-10-08 | Boston Scientific Corporation | Deflectable catheter |
EP1695673A3 (en) | 1994-07-08 | 2009-07-08 | ev3 Inc. | Intravascular filtering device |
US5556426A (en) | 1994-08-02 | 1996-09-17 | Meadox Medicals, Inc. | PTFE implantable tubular prostheses with external coil support |
JPH0856951A (en) * | 1994-08-25 | 1996-03-05 | Olympus Optical Co Ltd | Clamping forceps for endoscope |
US5658296A (en) | 1994-11-21 | 1997-08-19 | Boston Scientific Corporation | Method for making surgical retrieval baskets |
US5549626A (en) | 1994-12-23 | 1996-08-27 | New York Society For The Ruptured And Crippled Maintaining The Hospital For Special Surgery | Vena caval filter |
DE69631121T2 (en) * | 1995-02-02 | 2004-08-19 | Boston Scientific Corp., Natick | SURGICAL EXTRACTOR WITH A WIRE BASKET |
US6350266B1 (en) | 1995-02-02 | 2002-02-26 | Scimed Life Systems, Inc. | Hybrid stone retrieval device |
ES2206549T3 (en) | 1995-04-14 | 2004-05-16 | B. Braun Medical Sas | INSTRUMENTAL MEDICAL DEVICE SUCH AS SANGUINEO FILTER. |
US6168604B1 (en) * | 1995-10-06 | 2001-01-02 | Metamorphic Surgical Devices, Llc | Guide wire device for removing solid objects from body canals |
US5788710A (en) * | 1996-04-30 | 1998-08-04 | Boston Scientific Corporation | Calculus removal |
US6096053A (en) * | 1996-05-03 | 2000-08-01 | Scimed Life Systems, Inc. | Medical retrieval basket |
US5669933A (en) | 1996-07-17 | 1997-09-23 | Nitinol Medical Technologies, Inc. | Removable embolus blood clot filter |
ES2214698T3 (en) * | 1997-02-24 | 2004-09-16 | Cook Urological Inc. | FOLDING FILTER BASKET FOR MEDICAL USE. |
DE69829974T8 (en) * | 1997-07-24 | 2006-04-27 | Rex Medical, L.P. | DEVICE FOR BRUSH SURGERY |
US6077274A (en) * | 1997-09-10 | 2000-06-20 | Asahi Kogaku Kogyo Kabushiki Kaisha | Basket-type grasping tool adapted for use in combination with an endoscope |
US6099534A (en) * | 1997-10-01 | 2000-08-08 | Scimed Life Systems, Inc. | Releasable basket |
US6098053A (en) * | 1998-01-28 | 2000-08-01 | Citibank, N.A. | System and method for performing an electronic financial transaction |
JP3075355B2 (en) * | 1998-02-05 | 2000-08-14 | オリンパス光学工業株式会社 | Basket type grasping forceps |
US6187017B1 (en) * | 1998-02-17 | 2001-02-13 | Circon Corporation | Retrieval basket for a surgical device |
US6908474B2 (en) * | 1998-05-13 | 2005-06-21 | Gore Enterprise Holdings, Inc. | Apparatus and methods for reducing embolization during treatment of carotid artery disease |
JP3684085B2 (en) * | 1998-09-02 | 2005-08-17 | ペンタックス株式会社 | Endoscopic wire loop treatment tool |
US6159220A (en) * | 1999-03-11 | 2000-12-12 | Scimed Life Systems, Inc. | Medical retrieval device |
US7169154B1 (en) * | 1999-05-25 | 2007-01-30 | Scimedlife Systems, Inc. | Releasable basket and method of making thereof |
US6368328B1 (en) * | 1999-09-16 | 2002-04-09 | Scimed Life Systems, Inc. | Laser-resistant medical retrieval device |
JP4441043B2 (en) * | 2000-03-14 | 2010-03-31 | Hoya株式会社 | Endoscope snare |
-
2000
- 2000-04-26 US US09/559,385 patent/US6350266B1/en not_active Expired - Lifetime
-
2001
- 2001-04-23 DE DE60137920T patent/DE60137920D1/en not_active Expired - Lifetime
- 2001-04-23 EP EP01930661A patent/EP1278464B1/en not_active Expired - Lifetime
- 2001-04-23 AU AU2001257170A patent/AU2001257170B2/en not_active Ceased
- 2001-04-23 WO PCT/US2001/013065 patent/WO2001080748A2/en active Application Filing
- 2001-04-23 AU AU5717001A patent/AU5717001A/en active Pending
- 2001-04-23 CA CA002403626A patent/CA2403626A1/en not_active Abandoned
- 2001-04-23 JP JP2001577851A patent/JP4732665B2/en not_active Expired - Fee Related
-
2002
- 2002-01-24 US US10/057,535 patent/US6872211B2/en not_active Expired - Fee Related
-
2005
- 2005-01-07 US US11/030,044 patent/US8828022B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
US6872211B2 (en) | 2005-03-29 |
EP1278464B1 (en) | 2009-03-11 |
DE60137920D1 (en) | 2009-04-23 |
AU2001257170B2 (en) | 2006-10-26 |
US8828022B2 (en) | 2014-09-09 |
JP2003530944A (en) | 2003-10-21 |
WO2001080748A3 (en) | 2002-01-10 |
AU5717001A (en) | 2001-11-07 |
US20050216031A1 (en) | 2005-09-29 |
WO2001080748A2 (en) | 2001-11-01 |
US20020068944A1 (en) | 2002-06-06 |
EP1278464A2 (en) | 2003-01-29 |
JP4732665B2 (en) | 2011-07-27 |
US6350266B1 (en) | 2002-02-26 |
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Legal Events
Date | Code | Title | Description |
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EEER | Examination request | ||
FZDE | Discontinued |