CA1289837C - Dual coil steerable guidewire - Google Patents
Dual coil steerable guidewireInfo
- Publication number
- CA1289837C CA1289837C CA000555931A CA555931A CA1289837C CA 1289837 C CA1289837 C CA 1289837C CA 000555931 A CA000555931 A CA 000555931A CA 555931 A CA555931 A CA 555931A CA 1289837 C CA1289837 C CA 1289837C
- Authority
- CA
- Canada
- Prior art keywords
- coil
- guidewire
- distal
- main wire
- distal end
- 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.)
- Expired - Fee Related
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
- A61M25/09—Guide wires
- A61M25/09016—Guide wires with mandrils
- A61M25/09033—Guide wires with mandrils with fixed mandrils, e.g. mandrils fixed to tip; Tensionable wires
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
- A61M25/09—Guide wires
- A61M2025/09166—Guide wires having radio-opaque features
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
- A61M25/09—Guide wires
- A61M2025/09175—Guide wires having specific characteristics at the distal tip
Abstract
DUAL COIL STEERABLE GUIDEWIRE
ABSTRACT OF THE DISCLOSURE
A steerable guidewire has an elongate main wire having a tapered distal portion and a helical coil mounted about the distal portion. The distal end of the coil extends beyond the distal tip of the tapered distal portion of the main wire. An inner helical coil is disposed within the outer coil is secured at its proximal end to the distal tip of the tapered distal portion of the main wire and at its distal end to the distal end of the outer coil. The device does not have a separate safety wire, the inner coil serving as the sole safety connection between the main wire and the outer coil. The omission of the conventional safety wire and the use of the dual coil construction provides a tip which is equally flexible in all directions. Gradual selected transitions in stiffness may be achieved by varying the spacing of the individual turns of the inner and outer coils. The guidewire also provides for a change in the radiopacity of the distal portion of the guidewire to provide a more radiopaque segment at the distal portion than at the more proximal portions by forming the inner coil from a more radiopaque material than the outer coil.
ABSTRACT OF THE DISCLOSURE
A steerable guidewire has an elongate main wire having a tapered distal portion and a helical coil mounted about the distal portion. The distal end of the coil extends beyond the distal tip of the tapered distal portion of the main wire. An inner helical coil is disposed within the outer coil is secured at its proximal end to the distal tip of the tapered distal portion of the main wire and at its distal end to the distal end of the outer coil. The device does not have a separate safety wire, the inner coil serving as the sole safety connection between the main wire and the outer coil. The omission of the conventional safety wire and the use of the dual coil construction provides a tip which is equally flexible in all directions. Gradual selected transitions in stiffness may be achieved by varying the spacing of the individual turns of the inner and outer coils. The guidewire also provides for a change in the radiopacity of the distal portion of the guidewire to provide a more radiopaque segment at the distal portion than at the more proximal portions by forming the inner coil from a more radiopaque material than the outer coil.
Description
AZB/dmc DUAL COIL STEERABLE GUIDEWIRE
FIELD OF THE INVENTION
This invention relates to guidewires used in surgical procedures, for example, to guide and place a catheter in a blood vessel.
BACKGROUND OF THE INVENTION
This invention relates to guidewires such as are commonly used in the placement of catheters at various locations in a patient's cardiovascular system. Typically, the guidewire is placed percutaneously into the blood vessel and a catheter having a lumen adapted to receive the guidewire is advanced over the guidewire. For example, the guidewire may be of the small diameter steerable type disclosed in U.S. Patent 4,545,390 to Leary.
The guidewire disclosed in the Leary patent is useful particularly in guiding small diameter catheters into distally located, small blood vessels such as the coronary arteries. The guidewire has a ' ~
, 9R~'37 AZB~dmc 12/05/~6 main wire with a tapered distal portion and a helical coil mounted to and about the tapered distal portion. The coil may extend distally beyond the distal tip of the tapered portion of the main wire and a safety wire may be provided to connect the distal tip of the main wire with the distal tip of the coil. The safety wire assures that if the distal portion of the spring breaks, it will remain attached to the guidewire so that the broken distal portion can be withdrawn from the patient.
In some instances, the safety wire presents some disadvantage in that it imparts additional stiffness to the distal tip of the guidewire. Additionally, the use of a separate safety wire tends to give the distal tip of the wire a directional characteristic, so that it will tend to bend more readily along a particular plane than in other directions. In some cases, the clirectional characteristic resulting from the use of t:he safety wire is undesirable in that it can be difficult to control the positioning of the tip. ~erefore, it is deslrable to provide a guidewire construction with a tip having less stiffness and in which the tip is equally flexible in all directions, while maintaining a safety connection between the main wire and the coil.
- ' ' - i . .
~, ~ . . .
~1.2~ ^37 B0410/70~7 AZB/dmc Another desirable feature is to provide a guidewire in which the distal end has a graduated stiffness transition so as to avoid kinking and possible trauma to the blood vessel.
Guidewires typically are advanced and placed in a patient's vascular system while monitoring the position of the guidewire fluoroscopically. It is desirable that the guidewire be sufficiently opaque to x-rays to provide a clear indication of the location and position of the guidewire but without obstructing the fluoroscopic image of the more proximally located portions of the blood vessel in which the guidewire is placed. Thus, there may be instances in which a greater radiopacity is preferred for the distal portion of the coil.
Another disadvantage which results from the use of a safety ribbon in the guidewire is that it results in relatively little strain relief in the event that t:he safety ribbon breaks, as may occur under a tensile load or when forming a curve in the distal end of the coil.
It is among the general objects of the invention to provide an improved guidewire construction which avoids the foregoing difficulties while providing the foregoing advantages.
. . . . . .. . . .
: .
' ' : . :
3.~9~;3~
AZB/dmc SUMMARY OF THE I NVENT I ON
The guidewire includes an elongate main wire having a tapered distal region. An outer helically wound coil is mounted on the distal region of the main wire about the tapered region, with the distal end of the coil extending distally beyond the distal tip of the main wire. A second coil having a smaller outer diameter than the inner diameter of the outer coil is enclosed within the outer coil and is connected at its proximal end to the distal end of the tapered region of the main wire. The distal tip of the inner coil is connected to the distal tip of the outer coil at a generally hemispherical bead which defines the distal tip of the guidewire. The inner coil serves as the sole safety means for the guidewire, there being no other safety wire connecting the distal tip of the outer coil with the distal end of the main wire. The flexibility of the composite inner and outer coils is uniform in all directions. The degree of flexibility may be varied as desired by spacing selected of the adjacent coils in one or both of the inner and outer coils to provide the desired composite flexibility characteristics. The inner coil may be formed from an alloy which is more radiopaque than that from - - .
, ~ ` ' ~ .2~9f~7 Bo410/7027 AZB/dmc which the outer coil is formed so as to provide a distal segment having greater radiopacity than the more proximal portions of the guidewire.
It is among the general objects of the invention to provide an improved guidewire construction by which a guidewire may have a distal portion having a high degree of omnidirectional fl.exibility.
Another object of the invention is to provide an improved guidewire construction in which the distal portion of the guidewire is provided with a s~oothly graduated transition and flexibility.
A further object of the invention is to provide an improved guidewire construction by which the distal tip of the guidewire is more highly radiopaque than the more proximal portions of the distal tip region of the guidewire.
Another object of the invention is to provide an improved guidewire construction irl which the distal coil region provides an increased strain relief to axial and bending loads.
Another object of the invention is to provide an improved guidewire construction in which the foregoing objects are achieved without the use of a conventional safety wire.
-- , , ',- , -~ ~ ~ .
~-:. - . ~ ' ' . . - . ;
~.'2~ 37 AZB/dmc DESCRIPTION OF THE DRAWING
The foregoing and other objects and advantages of the invention will be appreciated more fully from the accompanying drawings in which:
FIG. 1 is a fragmented, sectional illustration of the guidewire; and FIG. 2 is an enlarged fragmented sectional illustration of the distal portion of the guidewire.
DESCRIPTION OF THE PREFERRED EMBODIMENT
; 10 As shown in the drawing, the guidewire includes a main wire 10 which may be formed from stainless steel. The main wire 10 extends over most of the overall length of the guidewire, which may be between about 145 to 300 cm long. The distal region 12 of the main wire 10 is tapered and terrninates in a tip 14. E3y way of example, the distal region 12 may be of the order of 25 to 30 cm long. The taper may be formed in steps, for example, to include a pro~imal first tapered segment 12A, a second portion 12B which may be of uniform diameter and a third portion 12C which is tapered. By way of example, the main wire 10 may be of the order of .016"
diameter and the section 12B may be of the order of .008" diameter. The tip 14 preferably terminates in - ' ', ' " ~ ' -J.~R.~ 7 AZB/dmc : - 7 -a diameter of the order of .001". The tapered distal region 12 may be formed by centerless grinding.
An outer coil 16 is helically wound and is mounted to the main wire 10 about the distal region 12. The outer coil 16 is sufficient long so that the distal tip 18 of the coil 16 extends beyond the distal tip 14 of the main wire 10, thereby defining a distal segment 20. The proximal end of the coil 16 is secured to the main wire 10 adjacent the region where the wire begins to taper, such as by brazing as indicated at 21. The outer coil 16 also is secured to the main wire 10 at a more distal location, such as.by brazing it to the distal tapered portion 12C, as indicated at 23.
The guicLewire includes an inner coil 22 which extends along the distal segment 20 and is connected at its proximal and distal ends to the region of the tip 14, of the main wire as by brazing at 24, and the distal tip 18 of the outer coil, respectively.
The distal tip of the guidewire may be formed to include a welded bead 26 which is smoothly rounded and welds the coils 16, 22 together. In accordance with the invention, the inner coil 22 comprises the sole connection between the distal tip 14 of the main wire and the distal tip 18 of the outer coil 16. In one embodiment of the invention, the outer :' -.
:
~ X~ 7 AZ~/dmc and inner coils 16, 22 are wound in opposite directions. That may be desirable in a small diameter (less than about 0.020") guidewire of the type described in the Leary patent. The torsional rigidity of the composite distal tip is enhanced in both rotational directions, that is, the de~ice tends to transmit rotation about equally in both directions. In another embodiment (illustrated in the drawing) the outer and inner coils 16, 22 are wound in the same direction. That configuration provides advantages in the axial strength of the guidewire and in the failure mode under the influence of an axial load to provide an additional measure of safety. Should the distal weld at the hemispherical tip 24 break, the continued axial load on the outer coil 16 will continue to stretch the outer coil 16 which causes the diameter of the outer coil to constrict about the inner coil 22. When the outer and inner coils 16, 22 are wound in the same direction, the outer coil 16 tends to interlock with the inner coil 22 so that the coils 16, 22 can cooperate in resisting further axial stretching.
The spacing on the outer and inner coils 16, 22 may be varied to provide a wide range of flexibility of the guidewire. In the illustrative embodiment, the spacing 28 of the individual turns in inner coil 22 is of the order of 0.0002".
' ' .
- : . .
. - ., . - : :
.. :, , , '. ' ' - ' 33~7 ~0410/7027 AZB/dmc 7633~
The inner coil 22 does not impart any bias to the direction in which the distal segment 20 flexes because it is free of conventional safety wires.
The drawing illustrates further the manner in which the outer and inner coils 16, 22 may be arranged to provide for a smooth transition and progressively increasing flexibility in a distal direction.
In another aspect of the invention, the inner and outer coils 22, 16 may be formed from a radiopaque alloy. For example, the inner and outer coils may be formed from an alloy of 80% platinum, 15% rhodium and 5% ruthenium. That alloy has been found to.provide a suitably malleable property which enables a curve to be formed relatively easily in the distal tip of the coil. Alternately, an alloy of 92% platinum and 8% tungsten may be used. In that configuration, the entire length of the outer coil will be radiopaque with the distal segment having a higher radiopacity. In alternative embodiments, the portion of the outer coil 16 proximal of the distal segment 20 may be made less opaque to x-rays by forming the outer coil 16 from stainless steel and the inner coil 22 from the radiopaque alloy. That configuration provides a highly radiopaque segment at the distal segment 20 and a less radiopaque portion proximal of the distal segment. With that arrangement, the distal segment ~ ' ' ' ` .
~ 2~ 7 AZB/dmc 20 will be highly radiopaque and will be clearly visible under fluoroscopy. The more proximal segment of the outer coil 16 will have less radiopacity and will present less of a visual obstruction to those portions of the blood vessel located proximally of the distal segment 20.
By way of further illustrative example, the guidewire may be of the order of 185 cm long. The main wire may be of the order of 0.014"-0.018"
diameter. In a preferred embodiment, the main wire is 0.016" diameter and the outer coil is 0.012"
diameter. The stepped down configuration from the larger diameter main wire to the smaller outer diameter for the outer coil provides a guidewire having a high degree of torsional rigidity by which angular rotation of the proximal end of the guidewire may be transmitted substantially fully to the distal end, but in which the distal end is of a smaller diameter so that it may obstruct less of the catheter lumen through which it passes, particularly in the region of a dilatation balloon, thereby providing for a larger annular flow area in the catheter lumen and enabling better distal pressure measurement and dye injection. In the illustrative embodiment, the outer coil 16 may be formed from .002" diameter wire wound to a coil diameter of .012". The inner coil may have an outer diameter of 0.006" and is formed from rectangular cross-section - : - -AZB/dmc ribbon 0.0015" x 0.003" diameter. The ribbon configuration is preferred in the forming of the inner coil because the ribbon is more resistant to stretching out than round cross-sectional wire and also enables the inner coil to be formed with a smaller outer diameter.
From the foregoing it will be appreciated that I
have described an improved construction for a guidewire in which the distal tip has omnidirectional flexibility while maintaining a safety connection to the distal tip of the outer coil, but without using the conventional safety wire. Additionally, the guidewire construction provides an arrangement for a smooth and gradual increase in fle~ibility toward the distal tip as well as an arrangement in which the radiopacity at the tip is sufficient to provide good fluoroscopic monitoring but which does not obstruct the fluoroscopic view of portions of the blood vessel immediately adjacent the distal tip of the guidewire. It should be understood, however, that the foregoing description of the invention is intended merely to be illustrative thereof and that other modifications and embodiments may be apparent to those skilled in the art without departing from its spirit.
Having thus described the invention, what I
desire to claim and secure by letters patent is:
' .
- :
.. . . . . .
FIELD OF THE INVENTION
This invention relates to guidewires used in surgical procedures, for example, to guide and place a catheter in a blood vessel.
BACKGROUND OF THE INVENTION
This invention relates to guidewires such as are commonly used in the placement of catheters at various locations in a patient's cardiovascular system. Typically, the guidewire is placed percutaneously into the blood vessel and a catheter having a lumen adapted to receive the guidewire is advanced over the guidewire. For example, the guidewire may be of the small diameter steerable type disclosed in U.S. Patent 4,545,390 to Leary.
The guidewire disclosed in the Leary patent is useful particularly in guiding small diameter catheters into distally located, small blood vessels such as the coronary arteries. The guidewire has a ' ~
, 9R~'37 AZB~dmc 12/05/~6 main wire with a tapered distal portion and a helical coil mounted to and about the tapered distal portion. The coil may extend distally beyond the distal tip of the tapered portion of the main wire and a safety wire may be provided to connect the distal tip of the main wire with the distal tip of the coil. The safety wire assures that if the distal portion of the spring breaks, it will remain attached to the guidewire so that the broken distal portion can be withdrawn from the patient.
In some instances, the safety wire presents some disadvantage in that it imparts additional stiffness to the distal tip of the guidewire. Additionally, the use of a separate safety wire tends to give the distal tip of the wire a directional characteristic, so that it will tend to bend more readily along a particular plane than in other directions. In some cases, the clirectional characteristic resulting from the use of t:he safety wire is undesirable in that it can be difficult to control the positioning of the tip. ~erefore, it is deslrable to provide a guidewire construction with a tip having less stiffness and in which the tip is equally flexible in all directions, while maintaining a safety connection between the main wire and the coil.
- ' ' - i . .
~, ~ . . .
~1.2~ ^37 B0410/70~7 AZB/dmc Another desirable feature is to provide a guidewire in which the distal end has a graduated stiffness transition so as to avoid kinking and possible trauma to the blood vessel.
Guidewires typically are advanced and placed in a patient's vascular system while monitoring the position of the guidewire fluoroscopically. It is desirable that the guidewire be sufficiently opaque to x-rays to provide a clear indication of the location and position of the guidewire but without obstructing the fluoroscopic image of the more proximally located portions of the blood vessel in which the guidewire is placed. Thus, there may be instances in which a greater radiopacity is preferred for the distal portion of the coil.
Another disadvantage which results from the use of a safety ribbon in the guidewire is that it results in relatively little strain relief in the event that t:he safety ribbon breaks, as may occur under a tensile load or when forming a curve in the distal end of the coil.
It is among the general objects of the invention to provide an improved guidewire construction which avoids the foregoing difficulties while providing the foregoing advantages.
. . . . . .. . . .
: .
' ' : . :
3.~9~;3~
AZB/dmc SUMMARY OF THE I NVENT I ON
The guidewire includes an elongate main wire having a tapered distal region. An outer helically wound coil is mounted on the distal region of the main wire about the tapered region, with the distal end of the coil extending distally beyond the distal tip of the main wire. A second coil having a smaller outer diameter than the inner diameter of the outer coil is enclosed within the outer coil and is connected at its proximal end to the distal end of the tapered region of the main wire. The distal tip of the inner coil is connected to the distal tip of the outer coil at a generally hemispherical bead which defines the distal tip of the guidewire. The inner coil serves as the sole safety means for the guidewire, there being no other safety wire connecting the distal tip of the outer coil with the distal end of the main wire. The flexibility of the composite inner and outer coils is uniform in all directions. The degree of flexibility may be varied as desired by spacing selected of the adjacent coils in one or both of the inner and outer coils to provide the desired composite flexibility characteristics. The inner coil may be formed from an alloy which is more radiopaque than that from - - .
, ~ ` ' ~ .2~9f~7 Bo410/7027 AZB/dmc which the outer coil is formed so as to provide a distal segment having greater radiopacity than the more proximal portions of the guidewire.
It is among the general objects of the invention to provide an improved guidewire construction by which a guidewire may have a distal portion having a high degree of omnidirectional fl.exibility.
Another object of the invention is to provide an improved guidewire construction in which the distal portion of the guidewire is provided with a s~oothly graduated transition and flexibility.
A further object of the invention is to provide an improved guidewire construction by which the distal tip of the guidewire is more highly radiopaque than the more proximal portions of the distal tip region of the guidewire.
Another object of the invention is to provide an improved guidewire construction irl which the distal coil region provides an increased strain relief to axial and bending loads.
Another object of the invention is to provide an improved guidewire construction in which the foregoing objects are achieved without the use of a conventional safety wire.
-- , , ',- , -~ ~ ~ .
~-:. - . ~ ' ' . . - . ;
~.'2~ 37 AZB/dmc DESCRIPTION OF THE DRAWING
The foregoing and other objects and advantages of the invention will be appreciated more fully from the accompanying drawings in which:
FIG. 1 is a fragmented, sectional illustration of the guidewire; and FIG. 2 is an enlarged fragmented sectional illustration of the distal portion of the guidewire.
DESCRIPTION OF THE PREFERRED EMBODIMENT
; 10 As shown in the drawing, the guidewire includes a main wire 10 which may be formed from stainless steel. The main wire 10 extends over most of the overall length of the guidewire, which may be between about 145 to 300 cm long. The distal region 12 of the main wire 10 is tapered and terrninates in a tip 14. E3y way of example, the distal region 12 may be of the order of 25 to 30 cm long. The taper may be formed in steps, for example, to include a pro~imal first tapered segment 12A, a second portion 12B which may be of uniform diameter and a third portion 12C which is tapered. By way of example, the main wire 10 may be of the order of .016"
diameter and the section 12B may be of the order of .008" diameter. The tip 14 preferably terminates in - ' ', ' " ~ ' -J.~R.~ 7 AZB/dmc : - 7 -a diameter of the order of .001". The tapered distal region 12 may be formed by centerless grinding.
An outer coil 16 is helically wound and is mounted to the main wire 10 about the distal region 12. The outer coil 16 is sufficient long so that the distal tip 18 of the coil 16 extends beyond the distal tip 14 of the main wire 10, thereby defining a distal segment 20. The proximal end of the coil 16 is secured to the main wire 10 adjacent the region where the wire begins to taper, such as by brazing as indicated at 21. The outer coil 16 also is secured to the main wire 10 at a more distal location, such as.by brazing it to the distal tapered portion 12C, as indicated at 23.
The guicLewire includes an inner coil 22 which extends along the distal segment 20 and is connected at its proximal and distal ends to the region of the tip 14, of the main wire as by brazing at 24, and the distal tip 18 of the outer coil, respectively.
The distal tip of the guidewire may be formed to include a welded bead 26 which is smoothly rounded and welds the coils 16, 22 together. In accordance with the invention, the inner coil 22 comprises the sole connection between the distal tip 14 of the main wire and the distal tip 18 of the outer coil 16. In one embodiment of the invention, the outer :' -.
:
~ X~ 7 AZ~/dmc and inner coils 16, 22 are wound in opposite directions. That may be desirable in a small diameter (less than about 0.020") guidewire of the type described in the Leary patent. The torsional rigidity of the composite distal tip is enhanced in both rotational directions, that is, the de~ice tends to transmit rotation about equally in both directions. In another embodiment (illustrated in the drawing) the outer and inner coils 16, 22 are wound in the same direction. That configuration provides advantages in the axial strength of the guidewire and in the failure mode under the influence of an axial load to provide an additional measure of safety. Should the distal weld at the hemispherical tip 24 break, the continued axial load on the outer coil 16 will continue to stretch the outer coil 16 which causes the diameter of the outer coil to constrict about the inner coil 22. When the outer and inner coils 16, 22 are wound in the same direction, the outer coil 16 tends to interlock with the inner coil 22 so that the coils 16, 22 can cooperate in resisting further axial stretching.
The spacing on the outer and inner coils 16, 22 may be varied to provide a wide range of flexibility of the guidewire. In the illustrative embodiment, the spacing 28 of the individual turns in inner coil 22 is of the order of 0.0002".
' ' .
- : . .
. - ., . - : :
.. :, , , '. ' ' - ' 33~7 ~0410/7027 AZB/dmc 7633~
The inner coil 22 does not impart any bias to the direction in which the distal segment 20 flexes because it is free of conventional safety wires.
The drawing illustrates further the manner in which the outer and inner coils 16, 22 may be arranged to provide for a smooth transition and progressively increasing flexibility in a distal direction.
In another aspect of the invention, the inner and outer coils 22, 16 may be formed from a radiopaque alloy. For example, the inner and outer coils may be formed from an alloy of 80% platinum, 15% rhodium and 5% ruthenium. That alloy has been found to.provide a suitably malleable property which enables a curve to be formed relatively easily in the distal tip of the coil. Alternately, an alloy of 92% platinum and 8% tungsten may be used. In that configuration, the entire length of the outer coil will be radiopaque with the distal segment having a higher radiopacity. In alternative embodiments, the portion of the outer coil 16 proximal of the distal segment 20 may be made less opaque to x-rays by forming the outer coil 16 from stainless steel and the inner coil 22 from the radiopaque alloy. That configuration provides a highly radiopaque segment at the distal segment 20 and a less radiopaque portion proximal of the distal segment. With that arrangement, the distal segment ~ ' ' ' ` .
~ 2~ 7 AZB/dmc 20 will be highly radiopaque and will be clearly visible under fluoroscopy. The more proximal segment of the outer coil 16 will have less radiopacity and will present less of a visual obstruction to those portions of the blood vessel located proximally of the distal segment 20.
By way of further illustrative example, the guidewire may be of the order of 185 cm long. The main wire may be of the order of 0.014"-0.018"
diameter. In a preferred embodiment, the main wire is 0.016" diameter and the outer coil is 0.012"
diameter. The stepped down configuration from the larger diameter main wire to the smaller outer diameter for the outer coil provides a guidewire having a high degree of torsional rigidity by which angular rotation of the proximal end of the guidewire may be transmitted substantially fully to the distal end, but in which the distal end is of a smaller diameter so that it may obstruct less of the catheter lumen through which it passes, particularly in the region of a dilatation balloon, thereby providing for a larger annular flow area in the catheter lumen and enabling better distal pressure measurement and dye injection. In the illustrative embodiment, the outer coil 16 may be formed from .002" diameter wire wound to a coil diameter of .012". The inner coil may have an outer diameter of 0.006" and is formed from rectangular cross-section - : - -AZB/dmc ribbon 0.0015" x 0.003" diameter. The ribbon configuration is preferred in the forming of the inner coil because the ribbon is more resistant to stretching out than round cross-sectional wire and also enables the inner coil to be formed with a smaller outer diameter.
From the foregoing it will be appreciated that I
have described an improved construction for a guidewire in which the distal tip has omnidirectional flexibility while maintaining a safety connection to the distal tip of the outer coil, but without using the conventional safety wire. Additionally, the guidewire construction provides an arrangement for a smooth and gradual increase in fle~ibility toward the distal tip as well as an arrangement in which the radiopacity at the tip is sufficient to provide good fluoroscopic monitoring but which does not obstruct the fluoroscopic view of portions of the blood vessel immediately adjacent the distal tip of the guidewire. It should be understood, however, that the foregoing description of the invention is intended merely to be illustrative thereof and that other modifications and embodiments may be apparent to those skilled in the art without departing from its spirit.
Having thus described the invention, what I
desire to claim and secure by letters patent is:
' .
- :
.. . . . . .
Claims (10)
1. A guidewire comprising:
a main wire having a proximal end and a distal end and a distal tapered region;
a first outer helical coil mounted about the tapered region of the main wire and being connec-ted to the main wire at the proximal end of the coil, the distal end of the coil extending distally beyond the distal end of the main wire;
a second, inner, helical coil having a smaller diameter than the first coil and being dis-posed within the first coil, the second coil being connected at its proximal end to the distal region of the main wire and at its distal end to the distal end of the outer coil;
the second, inner, coil defining a safety means to maintain connection between the main wire and a distal portion of the first coil in the event of breakage of the first coil, said second coil com-prising the sole safety means connecting the distal end of the outer coil with the main wire;
the outer and second coils being wound in the same direction.
a main wire having a proximal end and a distal end and a distal tapered region;
a first outer helical coil mounted about the tapered region of the main wire and being connec-ted to the main wire at the proximal end of the coil, the distal end of the coil extending distally beyond the distal end of the main wire;
a second, inner, helical coil having a smaller diameter than the first coil and being dis-posed within the first coil, the second coil being connected at its proximal end to the distal region of the main wire and at its distal end to the distal end of the outer coil;
the second, inner, coil defining a safety means to maintain connection between the main wire and a distal portion of the first coil in the event of breakage of the first coil, said second coil com-prising the sole safety means connecting the distal end of the outer coil with the main wire;
the outer and second coils being wound in the same direction.
2. A guidewire as defined in claim 1, wherein said outer coil is connected to the main wire at a location adjacent the distal end of the main wire.
3. A guidewire as defined in claim 2, wherein the outer coil is longer than the second coil.
4. A guidewire as defined in claim 3, wherein one of the coils is formed from a more radiopaque material than the other of the coils.
5. A guidewire as defined in claim 4, wherein the inner coil is more radiopaque than the outer coil.
6. A guidewire as defined in claim 5, wherein the inner coil is formed from an alloy comprising 80%
platinum, 15% rhodium, and 5% ruthenium.
platinum, 15% rhodium, and 5% ruthenium.
7. A guidewire as defined in claim 5, wherein the inner coil is formed from an alloy comprising 92%
platinum and 8% tungsten.
platinum and 8% tungsten.
8. A guidewire as defined in claims 1 or 2, wherein at least one of the coils is formed from an alloy comprising 80% platinum, 15% rhodium, and 5%
ruthenium.
ruthenium.
9. A guidewire as defined in claims 1 or 2, wherein at least one of the coils is formed from an alloy comprising 92% platinum and 8% tungsten.
10. A guidewire as defined in claims 1 or 2, wherein the second coil is formed from wire having a flat rectangular cross-section.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US07/000,847 US4763647A (en) | 1987-01-06 | 1987-01-06 | Dual coil steerable guidewire |
US000,847 | 1987-01-06 |
Publications (1)
Publication Number | Publication Date |
---|---|
CA1289837C true CA1289837C (en) | 1991-10-01 |
Family
ID=21693260
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA000555931A Expired - Fee Related CA1289837C (en) | 1987-01-06 | 1988-01-06 | Dual coil steerable guidewire |
Country Status (5)
Country | Link |
---|---|
US (1) | US4763647A (en) |
EP (1) | EP0274412B1 (en) |
JP (1) | JPS63181774A (en) |
CA (1) | CA1289837C (en) |
DE (1) | DE3873356T2 (en) |
Families Citing this family (185)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4917088A (en) * | 1985-05-02 | 1990-04-17 | C. R. Bard, Inc. | Balloon dilation probe |
US6685696B2 (en) | 1987-09-30 | 2004-02-03 | Lake Region Manufacturing, Inc. | Hollow lumen cable apparatus |
US5154705A (en) * | 1987-09-30 | 1992-10-13 | Lake Region Manufacturing Co., Inc. | Hollow lumen cable apparatus |
US6210395B1 (en) | 1987-09-30 | 2001-04-03 | Lake Region Mfg., Inc. | Hollow lumen cable apparatus |
US4934380A (en) * | 1987-11-27 | 1990-06-19 | Boston Scientific Corporation | Medical guidewire |
US4846186A (en) * | 1988-01-12 | 1989-07-11 | Cordis Corporation | Flexible guidewire |
JP2610507B2 (en) * | 1988-12-29 | 1997-05-14 | テルモ株式会社 | Guide wire |
US5308324A (en) * | 1989-01-09 | 1994-05-03 | Pilot Cardiovascular Systems, Inc. | Steerable medical device |
US5108368A (en) * | 1990-01-04 | 1992-04-28 | Pilot Cardiovascular System, Inc. | Steerable medical device |
US5037391A (en) * | 1989-01-09 | 1991-08-06 | Pilot Cardiovascular Systems, Inc. | Steerable angioplasty device |
US5480382A (en) * | 1989-01-09 | 1996-01-02 | Pilot Cardiovascular Systems, Inc. | Steerable medical device |
US5203772A (en) * | 1989-01-09 | 1993-04-20 | Pilot Cardiovascular Systems, Inc. | Steerable medical device |
US4998916A (en) * | 1989-01-09 | 1991-03-12 | Hammerslag Julius G | Steerable medical device |
EP0386921A3 (en) * | 1989-03-02 | 1991-07-31 | Microspring Company, Inc. | Torque transmitter |
US4922924A (en) * | 1989-04-27 | 1990-05-08 | C. R. Bard, Inc. | Catheter guidewire with varying radiopacity |
US5063935A (en) * | 1989-04-27 | 1991-11-12 | C. R. Bard, Inc. | Catheter guidewire with varying radiopacity |
CA2016178A1 (en) * | 1989-05-08 | 1990-11-08 | Rodney G. Wolff | Ptca catheter |
US5111829A (en) * | 1989-06-28 | 1992-05-12 | Boston Scientific Corporation | Steerable highly elongated guidewire |
US5144959A (en) * | 1989-08-15 | 1992-09-08 | C. R. Bard, Inc. | Catheter guidewire with varying radiopacity |
US7033325B1 (en) * | 1989-12-19 | 2006-04-25 | Scimed Life Systems, Inc. | Guidewire with multiple radiopaque marker sections |
US5031982A (en) * | 1990-05-23 | 1991-07-16 | Hughes Aircraft Company | Flexible payout duct |
US5069217A (en) * | 1990-07-09 | 1991-12-03 | Lake Region Manufacturing Co., Inc. | Steerable guide wire |
US5345945A (en) * | 1990-08-29 | 1994-09-13 | Baxter International Inc. | Dual coil guidewire with radiopaque distal tip |
US5178158A (en) * | 1990-10-29 | 1993-01-12 | Boston Scientific Corporation | Convertible guidewire-catheter with soft tip |
US5211636A (en) * | 1990-10-31 | 1993-05-18 | Lake Region Manufacturing Co., Inc. | Steerable infusion guide wire |
WO1992008501A1 (en) * | 1990-11-09 | 1992-05-29 | Medtronic, Inc. | Fixed wire catheter and unitary guidewire |
JP2630066B2 (en) * | 1990-11-30 | 1997-07-16 | 三菱電機株式会社 | Erase method for nonvolatile semiconductor memory device |
US5984877A (en) * | 1991-02-05 | 1999-11-16 | Fleischhacker, Jr.; Joseph F. | Guide wire marker technique and coil spring marker technique |
CA2086093C (en) * | 1991-05-07 | 1996-01-09 | Ivan Sepetka | Catheter guide wire |
US5333620A (en) * | 1991-10-30 | 1994-08-02 | C. R. Bard, Inc. | High performance plastic coated medical guidewire |
US5253653A (en) * | 1991-10-31 | 1993-10-19 | Boston Scientific Corp. | Fluoroscopically viewable guidewire for catheters |
US5363861A (en) * | 1991-11-08 | 1994-11-15 | Ep Technologies, Inc. | Electrode tip assembly with variable resistance to bending |
US5855560A (en) * | 1991-11-08 | 1999-01-05 | Ep Technologies, Inc. | Catheter tip assembly |
FR2684305B1 (en) * | 1991-11-29 | 1998-07-24 | Ela Medical Sa | CHUCK FOR ENDOCARDIAL PROBE. |
FR2685694B1 (en) * | 1991-12-30 | 1994-06-03 | Europ Propulsion | PROCESS FOR THE PROTECTION AGAINST OXIDATION OF PRODUCTS OF COMPOSITE MATERIAL CONTAINING CARBON, AND PRODUCTS OBTAINED BY THE PROCESS. |
US5243996A (en) * | 1992-01-03 | 1993-09-14 | Cook, Incorporated | Small-diameter superelastic wire guide |
US5234003A (en) * | 1992-02-20 | 1993-08-10 | Cook Incorporated | Flexible tip wire guide |
US5353808A (en) * | 1992-03-04 | 1994-10-11 | Cordis Corporation | Guidewire having distally located marker segment |
US5259393A (en) * | 1992-05-13 | 1993-11-09 | Cordis Corporation | Guidewire having controlled radiopacity tip |
US5344399A (en) * | 1992-05-26 | 1994-09-06 | Dlp, Inc. | Dual flexible introducer and cannula |
US5313967A (en) * | 1992-07-24 | 1994-05-24 | Medtronic, Inc. | Helical guidewire |
US5269759A (en) * | 1992-07-28 | 1993-12-14 | Cordis Corporation | Magnetic guidewire coupling for vascular dilatation apparatus |
US5437288A (en) * | 1992-09-04 | 1995-08-01 | Mayo Foundation For Medical Education And Research | Flexible catheter guidewire |
US5287858A (en) * | 1992-09-23 | 1994-02-22 | Pilot Cardiovascular Systems, Inc. | Rotational atherectomy guidewire |
US5299580A (en) * | 1992-10-09 | 1994-04-05 | Scimed Life Systems, Inc. | Guidewire with safety ribbon with substantially axially symmetric flexibility |
ES2089775T3 (en) * | 1993-05-19 | 1996-10-01 | Schneider Europ Ag | GUIDE WIRE. |
AU7115294A (en) * | 1993-06-24 | 1995-01-24 | Conceptus, Inc. | Guidewire-type device axially moveable by torque or axial force and methods for use thereof |
US5402799A (en) * | 1993-06-29 | 1995-04-04 | Cordis Corporation | Guidewire having flexible floppy tip |
US5363847A (en) * | 1993-10-27 | 1994-11-15 | Cordis Corporation | Guidewire having double distal portions |
US6673025B1 (en) | 1993-12-01 | 2004-01-06 | Advanced Cardiovascular Systems, Inc. | Polymer coated guidewire |
US5488959A (en) * | 1993-12-27 | 1996-02-06 | Cordis Corporation | Medical guidewire and welding process |
US5606981A (en) * | 1994-03-11 | 1997-03-04 | C. R. Bard, Inc. | Catheter guidewire with radiopaque markers |
US5406960A (en) * | 1994-04-13 | 1995-04-18 | Cordis Corporation | Guidewire with integral core and marker bands |
US5497783A (en) * | 1994-05-18 | 1996-03-12 | Scimed Life Systems, Inc. | Guidewire having radioscopic tip |
US5498250A (en) * | 1994-05-18 | 1996-03-12 | Scimed Life Systems, Inc. | Catheter guide wire with multiple radiopacity |
US5421349A (en) * | 1994-06-16 | 1995-06-06 | Cordis Corporation | Atraumatic proximal guidewire end |
ATE193834T1 (en) * | 1995-03-02 | 2000-06-15 | Schneider Europ Gmbh | METHOD FOR PRODUCING A GUIDE WIRE |
EP0739641A1 (en) * | 1995-04-26 | 1996-10-30 | Cordis Corporation | Formable tip guidewire |
US5551444A (en) * | 1995-05-31 | 1996-09-03 | Radius Medical Technologies, Inc. | Flexible guidewire with radiopaque outer coil and non-radiopaque inner coil |
US5830155A (en) | 1995-10-27 | 1998-11-03 | Cordis Corporation | Guidewire assembly |
US5836892A (en) * | 1995-10-30 | 1998-11-17 | Cordis Corporation | Guidewire with radiopaque markers |
US20030069522A1 (en) | 1995-12-07 | 2003-04-10 | Jacobsen Stephen J. | Slotted medical device |
US5682894A (en) * | 1996-04-26 | 1997-11-04 | Orr; Gregory C. | Guide wire |
ATE164772T1 (en) * | 1996-05-03 | 1998-04-15 | Schneider Europ Ag | METHOD FOR PRODUCING A GUIDE WIRE AND GUIDE WIRE |
US5827201A (en) * | 1996-07-26 | 1998-10-27 | Target Therapeutics, Inc. | Micro-braided guidewire |
US5865768A (en) * | 1996-09-30 | 1999-02-02 | Medtronic, Inc. | Guide wire |
US5810790A (en) * | 1996-11-19 | 1998-09-22 | Ebling; Wendell V. | Catheter with viewing system and port connector |
US5876356A (en) * | 1997-04-02 | 1999-03-02 | Cordis Corporation | Superelastic guidewire with a shapeable tip |
US7494474B2 (en) | 1997-06-04 | 2009-02-24 | Advanced Cardiovascular Systems, Inc. | Polymer coated guidewire |
US7455646B2 (en) | 1997-06-04 | 2008-11-25 | Advanced Cardiovascular Systems, Inc. | Polymer coated guide wire |
US6132388A (en) | 1997-10-16 | 2000-10-17 | Scimed Life Systems, Inc. | Guide wire tip |
US6824550B1 (en) * | 2000-04-06 | 2004-11-30 | Norbon Medical, Inc. | Guidewire for crossing occlusions or stenosis |
US20070225615A1 (en) * | 2006-03-22 | 2007-09-27 | Revascular Therapeutics Inc. | Guidewire controller system |
US6746422B1 (en) | 2000-08-23 | 2004-06-08 | Norborn Medical, Inc. | Steerable support system with external ribs/slots that taper |
US20080140101A1 (en) * | 2006-12-07 | 2008-06-12 | Revascular Therapeutic, Inc. | Apparatus for crossing occlusions or stenoses |
US9254143B2 (en) * | 1998-02-25 | 2016-02-09 | Revascular Therapeutics, Inc. | Guidewire for crossing occlusions or stenoses having a shapeable distal end |
US6059767A (en) * | 1998-02-25 | 2000-05-09 | Norborn Medical, Inc. | Steerable unitary infusion catheter/guide wire incorporating detachable infusion port assembly |
US20060074442A1 (en) * | 2000-04-06 | 2006-04-06 | Revascular Therapeutics, Inc. | Guidewire for crossing occlusions or stenoses |
US20050119615A1 (en) * | 2000-04-06 | 2005-06-02 | Norborn Medical, Inc. | Guidewire for crossing occlusions or stenoses |
US6306105B1 (en) * | 1998-05-14 | 2001-10-23 | Scimed Life Systems, Inc. | High performance coil wire |
US6139511A (en) * | 1998-06-29 | 2000-10-31 | Advanced Cardiovascular Systems, Inc. | Guidewire with variable coil configuration |
US6340368B1 (en) | 1998-10-23 | 2002-01-22 | Medtronic Inc. | Implantable device with radiopaque ends |
US6361557B1 (en) | 1999-02-05 | 2002-03-26 | Medtronic Ave, Inc. | Staplebutton radiopaque marker |
AU781910B2 (en) * | 2000-01-28 | 2005-06-23 | Cook Medical Technologies Llc | Endovascular medical device with plurality of wires |
US7381198B2 (en) | 2000-08-23 | 2008-06-03 | Revascular Therapeutics, Inc. | Steerable distal support system |
CA2450251C (en) | 2001-07-05 | 2008-10-21 | Precision Vascular Systems, Inc. | Torqueable soft tip medical device and method of usage |
US6908448B2 (en) * | 2001-08-24 | 2005-06-21 | Dermisonics, Inc. | Substance delivery device |
US6918882B2 (en) | 2001-10-05 | 2005-07-19 | Scimed Life Systems, Inc. | Guidewire with stiffness blending connection |
WO2003030982A2 (en) * | 2001-10-05 | 2003-04-17 | Boston Scientific Limited | Composite guidewire |
US7128718B2 (en) | 2002-03-22 | 2006-10-31 | Cordis Corporation | Guidewire with deflectable tip |
CA2675209C (en) | 2002-03-22 | 2013-01-08 | Cordis Corporation | Rapid-exchange balloon catheter shaft and method |
US20070219464A1 (en) * | 2002-03-22 | 2007-09-20 | Stephen Davis | Guidewire with deflectable re-entry tip |
US20070213689A1 (en) * | 2002-03-22 | 2007-09-13 | Grewe David D | Deflectable tip infusion guidewire |
US7351214B2 (en) | 2002-03-22 | 2008-04-01 | Cordis Corporation | Steerable balloon catheter |
US7520863B2 (en) | 2002-03-22 | 2009-04-21 | Cordis Corporation | Guidewire with deflectable tip having improved torque characteristics |
US7048728B2 (en) * | 2002-04-26 | 2006-05-23 | Witham Richard N | Noninvasive medical instrument |
US7022086B2 (en) | 2002-05-21 | 2006-04-04 | Scimed Life Systems, Inc. | Guidewire with encapsulated marker |
WO2004011076A2 (en) | 2002-07-25 | 2004-02-05 | Boston Scientific Limited | Medical device for navigation through anatomy and method of making same |
US7914467B2 (en) * | 2002-07-25 | 2011-03-29 | Boston Scientific Scimed, Inc. | Tubular member having tapered transition for use in a medical device |
US7153277B2 (en) * | 2002-12-03 | 2006-12-26 | Scimed Life Systems, Inc. | Composite medical device with markers |
US7077811B2 (en) * | 2002-12-23 | 2006-07-18 | Scimed Life Systems, Inc. | Guidewire tip construction |
US8377035B2 (en) | 2003-01-17 | 2013-02-19 | Boston Scientific Scimed, Inc. | Unbalanced reinforcement members for medical device |
US8113916B2 (en) * | 2003-01-17 | 2012-02-14 | Boston Scientific Scimed, Inc. | Straightening and centerless grinding of wire for use with medical devices |
US7044921B2 (en) | 2003-02-03 | 2006-05-16 | Scimed Life Systems, Inc | Medical device with changeable tip flexibility |
US20040167441A1 (en) * | 2003-02-26 | 2004-08-26 | Reynolds Brian R. | Composite medical device |
US7169118B2 (en) | 2003-02-26 | 2007-01-30 | Scimed Life Systems, Inc. | Elongate medical device with distal cap |
US20040167439A1 (en) * | 2003-02-26 | 2004-08-26 | Sharrow James S. | Guidewire having textured proximal portion |
US7182735B2 (en) * | 2003-02-26 | 2007-02-27 | Scimed Life Systems, Inc. | Elongated intracorporal medical device |
US8167821B2 (en) * | 2003-02-26 | 2012-05-01 | Boston Scientific Scimed, Inc. | Multiple diameter guidewire |
US20040167438A1 (en) * | 2003-02-26 | 2004-08-26 | Sharrow James S. | Reinforced medical device |
US7001369B2 (en) | 2003-03-27 | 2006-02-21 | Scimed Life Systems, Inc. | Medical device |
US8103358B2 (en) * | 2003-04-04 | 2012-01-24 | Medtronic, Inc. | Mapping guidelet |
US7582740B2 (en) * | 2003-04-17 | 2009-09-01 | The Trustees Of Columbia University In The City Of New York | Methods and kits for detecting SARS-associated coronavirus |
US8337519B2 (en) | 2003-07-10 | 2012-12-25 | Boston Scientific Scimed, Inc. | Embolic protection filtering device |
US7951091B2 (en) * | 2003-07-31 | 2011-05-31 | Tyco Healthcare Group Lp | Guide wire with stranded tip |
US7833175B2 (en) * | 2003-09-05 | 2010-11-16 | Boston Scientific Scimed, Inc. | Medical device coil |
US7540845B2 (en) * | 2003-09-05 | 2009-06-02 | Boston Scientific Scimed, Inc | Medical device coil |
US7621880B2 (en) * | 2003-09-05 | 2009-11-24 | Vance Products Incorporated | Double ended wire guide |
US7785273B2 (en) * | 2003-09-22 | 2010-08-31 | Boston Scientific Scimed, Inc. | Guidewire with reinforcing member |
US7824345B2 (en) | 2003-12-22 | 2010-11-02 | Boston Scientific Scimed, Inc. | Medical device with push force limiter |
US7641647B2 (en) | 2003-12-29 | 2010-01-05 | Boston Scientific Scimed, Inc. | Medical device with modified marker band |
US8172857B2 (en) | 2004-08-27 | 2012-05-08 | Davol, Inc. | Endoscopic tissue apposition device and method of use |
US7632242B2 (en) | 2004-12-09 | 2009-12-15 | Boston Scientific Scimed, Inc. | Catheter including a compliant balloon |
US7976518B2 (en) | 2005-01-13 | 2011-07-12 | Corpak Medsystems, Inc. | Tubing assembly and signal generator placement control device and method for use with catheter guidance systems |
CN100548410C (en) * | 2005-03-04 | 2009-10-14 | 导管治疗有限公司 | Modular catheter and the conduit tube component that comprises this handle |
US8267872B2 (en) * | 2005-07-07 | 2012-09-18 | St. Jude Medical, Cardiology Division, Inc. | Steerable guide wire with torsionally stable tip |
US20070185415A1 (en) * | 2005-07-07 | 2007-08-09 | Ressemann Thomas V | Steerable guide wire with torsionally stable tip |
US8784336B2 (en) * | 2005-08-24 | 2014-07-22 | C. R. Bard, Inc. | Stylet apparatuses and methods of manufacture |
US9445784B2 (en) | 2005-09-22 | 2016-09-20 | Boston Scientific Scimed, Inc | Intravascular ultrasound catheter |
US7850623B2 (en) | 2005-10-27 | 2010-12-14 | Boston Scientific Scimed, Inc. | Elongate medical device with continuous reinforcement member |
CA2663319A1 (en) | 2006-09-13 | 2008-03-20 | Boston Scientific Limited | Crossing guidewire |
US7881806B2 (en) * | 2006-10-31 | 2011-02-01 | Medtronic, Inc. | Medical lead delivery device |
US8532733B2 (en) | 2006-10-31 | 2013-09-10 | Medtronic, Inc. | Mapping guidelet |
US20080103571A1 (en) * | 2006-10-31 | 2008-05-01 | Ryan Thomas Bauer | Medical lead delivery device |
US8556914B2 (en) | 2006-12-15 | 2013-10-15 | Boston Scientific Scimed, Inc. | Medical device including structure for crossing an occlusion in a vessel |
JP5148936B2 (en) * | 2006-12-28 | 2013-02-20 | テルモ株式会社 | Guide wire |
WO2008085167A1 (en) * | 2007-01-10 | 2008-07-17 | St. Jude Medical, Cardiology Division, Inc. | Steerable guide wire with torsionally stable tip |
US8644955B2 (en) * | 2007-03-30 | 2014-02-04 | Medtronic, Inc. | Controller for a medical lead delivery device |
US8239003B2 (en) * | 2007-04-16 | 2012-08-07 | General Electric Company | System and method of integrating electromagnetic microsensors in guidewires |
US20080269641A1 (en) * | 2007-04-25 | 2008-10-30 | Medtronic Vascular, Inc. | Method of using a guidewire with stiffened distal section |
AU2008202483B2 (en) * | 2007-06-15 | 2011-07-14 | Cathrx Ltd | A deflectable stylet |
US8409114B2 (en) | 2007-08-02 | 2013-04-02 | Boston Scientific Scimed, Inc. | Composite elongate medical device including distal tubular member |
US8105246B2 (en) | 2007-08-03 | 2012-01-31 | Boston Scientific Scimed, Inc. | Elongate medical device having enhanced torque and methods thereof |
US8821477B2 (en) | 2007-08-06 | 2014-09-02 | Boston Scientific Scimed, Inc. | Alternative micromachined structures |
US9808595B2 (en) | 2007-08-07 | 2017-11-07 | Boston Scientific Scimed, Inc | Microfabricated catheter with improved bonding structure |
US7841994B2 (en) | 2007-11-02 | 2010-11-30 | Boston Scientific Scimed, Inc. | Medical device for crossing an occlusion in a vessel |
EP2259830B1 (en) | 2008-02-05 | 2017-08-16 | Bridgepoint Medical, Inc. | Crossing occlusions in blood vessels |
US8337425B2 (en) | 2008-02-05 | 2012-12-25 | Bridgepoint Medical, Inc. | Endovascular device with a tissue piercing distal probe and associated methods |
US8376961B2 (en) | 2008-04-07 | 2013-02-19 | Boston Scientific Scimed, Inc. | Micromachined composite guidewire structure with anisotropic bending properties |
US20090292225A1 (en) * | 2008-05-21 | 2009-11-26 | Boston Scientific Scimed, Inc. | Medical device including a braid for crossing an occlusion in a vessel |
US9002435B2 (en) * | 2008-06-30 | 2015-04-07 | General Electric Company | System and method for integrating electromagnetic microsensors in guidewires |
US8535243B2 (en) | 2008-09-10 | 2013-09-17 | Boston Scientific Scimed, Inc. | Medical devices and tapered tubular members for use in medical devices |
US8657821B2 (en) | 2008-11-14 | 2014-02-25 | Revascular Therapeutics Inc. | Method and system for reversibly controlled drilling of luminal occlusions |
US8162891B2 (en) | 2008-11-26 | 2012-04-24 | Revascular Therapeutics, Inc. | Delivery and exchange catheter for storing guidewire |
US8795254B2 (en) | 2008-12-10 | 2014-08-05 | Boston Scientific Scimed, Inc. | Medical devices with a slotted tubular member having improved stress distribution |
US8444577B2 (en) | 2009-01-05 | 2013-05-21 | Cook Medical Technologies Llc | Medical guide wire |
US9283305B2 (en) | 2009-07-09 | 2016-03-15 | Medtronic Vascular, Inc. | Hollow tubular drug eluting medical devices |
US20110070358A1 (en) * | 2009-09-20 | 2011-03-24 | Medtronic Vascular, Inc. | Method of forming hollow tubular drug eluting medical devices |
US8678046B2 (en) | 2009-09-20 | 2014-03-25 | Medtronic Vascular, Inc. | Apparatus and methods for loading a drug eluting medical device |
US8828474B2 (en) | 2009-09-20 | 2014-09-09 | Medtronic Vascular, Inc. | Apparatus and methods for loading a drug eluting medical device |
US8381774B2 (en) * | 2009-09-20 | 2013-02-26 | Medtronic Vascular, Inc. | Methods for loading a drug eluting medical device |
US8137293B2 (en) | 2009-11-17 | 2012-03-20 | Boston Scientific Scimed, Inc. | Guidewires including a porous nickel-titanium alloy |
EP2552530A1 (en) | 2010-03-31 | 2013-02-06 | Boston Scientific Scimed, Inc. | Guidewire with a flexural rigidity profile |
JP5240948B2 (en) * | 2010-08-02 | 2013-07-17 | 朝日インテック株式会社 | Guide wire |
US8333801B2 (en) | 2010-09-17 | 2012-12-18 | Medtronic Vascular, Inc. | Method of Forming a Drug-Eluting Medical Device |
US8616040B2 (en) | 2010-09-17 | 2013-12-31 | Medtronic Vascular, Inc. | Method of forming a drug-eluting medical device |
US8632846B2 (en) | 2010-09-17 | 2014-01-21 | Medtronic Vascular, Inc. | Apparatus and methods for loading a drug eluting medical device |
US8864685B2 (en) | 2010-10-22 | 2014-10-21 | Cook Medical Technologies Llc | Wire guide having two safety wires |
WO2012106628A1 (en) | 2011-02-04 | 2012-08-09 | Boston Scientific Scimed, Inc. | Guidewires and methods for making and using the same |
JP5709212B2 (en) * | 2011-03-30 | 2015-04-30 | 朝日インテック株式会社 | Guide wire |
JP5762789B2 (en) * | 2011-03-30 | 2015-08-12 | テルモ株式会社 | Guide wire |
US9072874B2 (en) | 2011-05-13 | 2015-07-07 | Boston Scientific Scimed, Inc. | Medical devices with a heat transfer region and a heat sink region and methods for manufacturing medical devices |
US9028441B2 (en) | 2011-09-08 | 2015-05-12 | Corpak Medsystems, Inc. | Apparatus and method used with guidance system for feeding and suctioning |
JP5780526B2 (en) * | 2012-12-27 | 2015-09-16 | 朝日インテック株式会社 | Guide wire |
US9486340B2 (en) | 2013-03-14 | 2016-11-08 | Medtronic Vascular, Inc. | Method for manufacturing a stent and stent manufactured thereby |
JP5448125B1 (en) | 2013-05-31 | 2014-03-19 | 株式会社エフエムディ | Medical guidewire |
WO2015095806A2 (en) | 2013-12-20 | 2015-06-25 | Microvention, Inc. | Device delivery system |
US9901706B2 (en) | 2014-04-11 | 2018-02-27 | Boston Scientific Scimed, Inc. | Catheters and catheter shafts |
US10806905B2 (en) * | 2014-08-05 | 2020-10-20 | Cardiovascular Systems, Inc. | Reformable guidewire tip |
US11351048B2 (en) | 2015-11-16 | 2022-06-07 | Boston Scientific Scimed, Inc. | Stent delivery systems with a reinforced deployment sheath |
JP6604654B2 (en) * | 2016-06-24 | 2019-11-13 | 朝日インテック株式会社 | catheter |
EP3695875B1 (en) * | 2017-10-12 | 2022-08-10 | Asahi Intecc Co., Ltd. | Guide wire |
JP7137396B2 (en) * | 2018-08-08 | 2022-09-14 | 株式会社ヨコオ | guide wire |
US11452533B2 (en) | 2019-01-10 | 2022-09-27 | Abbott Cardiovascular Systems Inc. | Guide wire tip having roughened surface |
JP7290451B2 (en) * | 2019-04-08 | 2023-06-13 | 朝日インテック株式会社 | guide wire |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3749086A (en) * | 1972-07-24 | 1973-07-31 | Medical Evaluation Devices & I | Spring guide with flexible distal tip |
US4003369A (en) * | 1975-04-22 | 1977-01-18 | Medrad, Inc. | Angiographic guidewire with safety core wire |
US4244362A (en) * | 1978-11-29 | 1981-01-13 | Anderson Charles C | Endotracheal tube control device |
US4545390A (en) * | 1982-09-22 | 1985-10-08 | C. R. Bard, Inc. | Steerable guide wire for balloon dilatation procedure |
CA1236750A (en) * | 1983-12-12 | 1988-05-17 | David W. Morrison | Floppy guide wire with opaque tip |
US4619274A (en) * | 1985-04-18 | 1986-10-28 | Advanced Cardiovascular Systems, Inc. | Torsional guide wire with attenuated diameter |
US4719924A (en) * | 1986-09-09 | 1988-01-19 | C. R. Bard, Inc. | Small diameter steerable guidewire with adjustable tip |
-
1987
- 1987-01-06 US US07/000,847 patent/US4763647A/en not_active Expired - Lifetime
- 1987-12-24 JP JP62328190A patent/JPS63181774A/en active Pending
-
1988
- 1988-01-05 DE DE8888300027T patent/DE3873356T2/en not_active Expired - Fee Related
- 1988-01-05 EP EP88300027A patent/EP0274412B1/en not_active Expired - Lifetime
- 1988-01-06 CA CA000555931A patent/CA1289837C/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
US4763647A (en) | 1988-08-16 |
EP0274412A2 (en) | 1988-07-13 |
JPS63181774A (en) | 1988-07-26 |
DE3873356D1 (en) | 1992-09-10 |
EP0274412B1 (en) | 1992-08-05 |
DE3873356T2 (en) | 1992-12-10 |
EP0274412A3 (en) | 1989-03-08 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CA1289837C (en) | Dual coil steerable guidewire | |
US5063935A (en) | Catheter guidewire with varying radiopacity | |
US5640970A (en) | Guidewire having a controlled radiopacity tip | |
US4922924A (en) | Catheter guidewire with varying radiopacity | |
US5377690A (en) | Guidewire with round forming wire | |
US4748986A (en) | Floppy guide wire with opaque tip | |
US5353808A (en) | Guidewire having distally located marker segment | |
US5345945A (en) | Dual coil guidewire with radiopaque distal tip | |
JP4600876B2 (en) | Guide wire | |
EP0812599B1 (en) | Catheter guide wire | |
US6475167B1 (en) | Guide wire tip | |
US5406960A (en) | Guidewire with integral core and marker bands | |
US5497783A (en) | Guidewire having radioscopic tip | |
US5228453A (en) | Catheter guide wire | |
EP0749334B1 (en) | Catheter guidewire with radiopaque markers | |
EP1165169B1 (en) | A helically wound guidewire | |
US6039699A (en) | Stiff catheter guidewire with flexible distal portion | |
EP0546094B1 (en) | Dual coil guidewire with radiopaque distal tip | |
WO2007121002A1 (en) | Medical guidewire tip construction | |
US20100228150A1 (en) | Neuro guidewire | |
US7048695B1 (en) | Guiding aid | |
KR20220144804A (en) | Guide wire with an enlarged, micromachined distal portion | |
US20030009184A1 (en) | Catheter having variable wire size radiopaque braid |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
MKLA | Lapsed |