US20110230720A1 - Endoscopic device having spray mechanism and related methods of use - Google Patents
Endoscopic device having spray mechanism and related methods of use Download PDFInfo
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- US20110230720A1 US20110230720A1 US13/118,006 US201113118006A US2011230720A1 US 20110230720 A1 US20110230720 A1 US 20110230720A1 US 201113118006 A US201113118006 A US 201113118006A US 2011230720 A1 US2011230720 A1 US 2011230720A1
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- Prior art keywords
- endoscopic device
- snare loop
- tubular member
- fluid
- nozzle
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- 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
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
- A61B18/12—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
- A61B18/14—Probes or electrodes therefor
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/00234—Surgical instruments, devices or methods, e.g. tourniquets for minimally invasive surgery
- A61B2017/00353—Surgical instruments, devices or methods, e.g. tourniquets for minimally invasive surgery one mechanical instrument performing multiple functions, e.g. cutting and grasping
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
- A61B18/12—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
- A61B18/14—Probes or electrodes therefor
- A61B2018/1405—Electrodes having a specific shape
- A61B2018/1407—Loop
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
- A61B90/39—Markers, e.g. radio-opaque or breast lesions markers
- A61B2090/3933—Liquid markers
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
- A61B90/39—Markers, e.g. radio-opaque or breast lesions markers
- A61B2090/3937—Visible markers
- A61B2090/395—Visible markers with marking agent for marking skin or other tissue
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B2217/00—General characteristics of surgical instruments
- A61B2217/002—Auxiliary appliance
- A61B2217/005—Auxiliary appliance with suction drainage system
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B2217/00—General characteristics of surgical instruments
- A61B2217/002—Auxiliary appliance
- A61B2217/007—Auxiliary appliance with irrigation system
-
- 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
- A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
- A61M1/84—Drainage tubes; Aspiration tips
- A61M1/85—Drainage tubes; Aspiration tips with gas or fluid supply means, e.g. for supplying rinsing fluids or anticoagulants
Definitions
- Embodiments of the present invention relate to a surgical instrument having a spray mechanism and related methods of use.
- the present invention relates to an endoscopic device that combines tissue cutting and spraying in a single device for use in, for example, a colonoscopic polypectomy.
- Colon cancer including colorectal cancer
- adenomas adenomatous polyps
- adenoma-carcinoma sequence is believed to be the precursors for the vast majority of colon cancers.
- Polypectomy is a therapeutic procedure typically used by a doctor to remove the adenomas from the colon or rectum. For example, once adenomas are detected during a routine colonoscopy or sigmoidoscopy, a doctor may insert a suitable polypectomy device, such as, for example, a snare catheter or biopsy forceps, to the site of the adenomas and remove the adenomas.
- a suitable polypectomy device such as, for example, a snare catheter or biopsy forceps
- some of the adenomas are polypoid that are readily detectable, some adenomas are small sized, have a flat or depressed profile, or lack sufficient color contrast with respect to the surrounding mucosa, which render the detection of such adenomas extremely difficult and may require specialized techniques to detect them.
- an embodiment of the invention relates to an endoscopic device that can facilitate the above-mentioned procedure by combining the ability to perform polypectomy and dye spraying in a single device.
- Such an embodiment includes an endoscopic device having a spray mechanism integrally incorporated into the device, thereby eliminating the need for using a separate spray catheter.
- one aspect of the invention may provide a medical device including a proximal handle, a distal assembly for performing a medical procedure, and an elongated member having a lumen and connecting the proximal handle to the distal assembly, where actuation of the proximal handle causes the distal assembly to perform the medical procedure.
- the distal assembly may include an end effector and a distal member defining a flow path therein for fluid communication between the lumen and an outside of the elongated member.
- the flow path may have a cross-sectional flow area less than a cross-sectional flow area of the lumen.
- Another aspect of the present invention may provide a medical device including an elongated member having a proximal end, a distal end, and a lumen therethrough, an end effector proximate the distal end of the elongated member, and a nozzle member configured to substantially seal the distal end of the lumen.
- the nozzle member may define a flow path in fluid communication between the lumen and an outside of the elongated member when the distal end of the lumen is sealed with the nozzle member.
- a method of performing a medical procedure includes inserting a medical device into a tissue tract of a patient, spraying fluid through a lumen of the medical device and onto tissue of the tissue tract to enhance visualization of tissue of the tissue tract, and actuating an end effector of the medical device to perform the medical procedure.
- a method of performing a medical procedure may include inserting a medical device into a patient, where the medical device includes an elongated member having a lumen, an end effector proximate a distal end of the elongated member, and a distal member configured to substantially seal the distal end of the lumen.
- the nozzle member may define a flow path in fluid communication between the lumen and an outside of the elongated member when the lumen is sealed with the nozzle member.
- the method may further include injecting fluid through the distal member of the medical device and actuating the end effector to perform the medical procedure.
- FIGS. 1 and 2 are top and side views of a snare catheter having a spray mechanism, according to an embodiment of the present invention, illustrating an open position of the snare catheter;
- FIGS. 3 and 4 are top and side views of the snare catheter shown in FIG. 1 , illustrating a closed position of the snare catheter;
- FIG. 5 is an exploded cross-sectional view of a distal portion of the snare catheter shown in FIGS. 1 and 2 ;
- FIG. 6 is an exploded cross-sectional view of a distal portion of the snare catheter shown in FIGS. 3 and 4 ;
- FIG. 7 is an exploded partial cross-sectional view of the proximal portion of the snare catheter shown in FIGS. 1-4 , illustrating the fluid flow path from a fluid supply source to a tubular member of the catheter, according to an embodiment of the present invention
- FIGS. 8A and 8B are cross-sectional views of nozzle members, according to various embodiments of the present invention.
- FIG. 9 is an exploded partial cross-sectional view of a distal portion of a snare catheter, according to another embodiment of the present invention.
- FIG. 10 is an exploded cross-sectional view of a distal portion of a snare catheter, according to still another embodiment of the present invention.
- FIGS. 1-6 illustrate an endoscopic device 10 according to an exemplary embodiment of the present invention, which incorporates a spray mechanism integrally with a tissue acquisition or cutting device, such as, for example, a polypectomy snare catheter.
- a tissue acquisition or cutting device such as, for example, a polypectomy snare catheter.
- the present invention will be described in connection with a particular snare catheter, the present invention may be applied to, or used in connection with, any other types of snare catheters, numerous other tissue cutting end effector devices, such as biopsy forceps, jaws, or scissors, or other medical devices, including endoscopic medical devices, that may be used in combination with a spray mechanism. These include, but are not limited to, graspers, injection needles, hemostasis clips, and balloon dilation devices.
- the endoscopic device 10 may include an elongated flexible tubular member 20 , a handle assembly 30 , an end effector, such as snare loop 40 , and a nozzle member 50 attached to a distal tip 49 (as shown in FIG. 5 ) of the snare loop 40 .
- the device 10 may also include a flexible control member 25 extending between the handle assembly 30 and the snare loop 40 through a lumen of the tubular member 20 .
- a device of the invention may not include the nozzle member 50 , such that the fluid may exit the distal end of the tubular member 20 in a stream-like manner without a nozzle-induced spray effect.
- the elongated flexible tubular member 20 may be fixedly secured to the handle assembly 30 via a suitable connection mechanism known in the art.
- the tubular member 30 may be made of a thermoplastic material, such as, for example, Teflon® or PTFE, but other suitable material known in the art may also be used instead.
- the tubular member 20 may, for example, be a metal coil and may include suitable biocompatible coatings.
- the dimensions of the tubular member 20 may vary depending upon the type of procedure being performed. In an exemplary embodiment, the outer diameter and length of the tubular member range from 2.0 mm to 2.5 mm, and from 200 cm to 250 cm, respectively.
- the tubular member 20 preferably has sufficient flexibility to traverse tortuous anatomy.
- the handle assembly 30 may include a thumb ring 31 fixedly attached to a main body 35 .
- the assembly 30 may further include a movable member 37 having a suitable finger grip, such as, for example, a pair of finger rings 36 .
- the main body 35 may be provided with a slide guide 33 along which the movable member 37 may reciprocally move relative to the main body 35 and the tubular member 20 .
- the movable member 37 may also be configured to be rotatable with respect to the axis of the main body 35 so as to control the orientation of the snare loop 40 and/or the nozzle member 50 . As will be described herein, this reciprocal movement of the movable member 37 controls the opening and closing of the snare loop 40 .
- the handle assembly 30 may include a fluid connector 38 which may be used to connect to a source of fluid 60 (see FIG. 4 ) intended to be sprayed by the device 10 .
- a fluid connector 38 may be used to extend perpendicularly from the transverse axis of the handle assembly 30 , any other types of connections known in the art may be employed.
- the fluid to be sprayed may be supplied by a suitable pressurizing means.
- the fluid may be injected into the device 10 by a syringe 60 , but any other suitable fluid supplying member may be alternatively used.
- the fluid connector 38 may include a suitable interlocking mechanism (not shown) associated with a fluid supplying member, such as a luer lock, so as to provide a leak-proof fluid connection between the device 10 and the fluid supplying member 60 .
- a fluid supplying member such as a luer lock
- Various seal members may also be provided to enhance the leak-proof fluid connection.
- the fluid connector 38 may be provided with a stopper or cap (not shown) to close the opening of the connector 38 .
- the distal portion of the handle assembly 30 may include a fluid chamber 65 for temporarily storing the fluid injected from the fluid supplying member 60 and directing the fluid to the tubular member 20 , as shown in FIG. 7 .
- the fluid chamber 65 may be separated from the proximal portion of the handle assembly 30 by an annular flange 64 and a sealing member, such as, for example, a sealing ring 62 , so that the fluid injected into the fluid chamber 65 does not penetrate into the proximal portion of the handle assembly 30 .
- the annular flange 64 may form a circumferential groove 63 on an inner surface of the flange 64 to accommodate the sealing ring 62 , thereby preventing axial movement of the sealing ring 62 .
- the distal portion of the handle assembly 30 may include a tube extending from the fluid connector 38 to the proximal or distal end of the tubular member 20 .
- the handle assembly 30 may also include an electrical connector 32 for receiving cautery current from a power supply source (not shown) for an electrosurgical application.
- a power supply source not shown
- Other suitable electrical connectors such as the embodiments described in U.S. Pat. No. 5,575,694 to Hawkins et al., entitled “Electrical Connector for Attachment to a Medical Device,” the disclosure of which is hereby incorporated by reference, can also be used.
- the handle assembly 30 shown and described in FIGS. 1-4 is exemplary.
- Other handles known in the art that can actuate a distal end effector assembly and that also can include a fluid port may be used.
- a handle assembly may also include a separate rotation actuator (not shown) for controlling a rotational movement of the snare loop 40 or may have a scissors-like actuation mechanism or different actuation mechanism for operating the snare loop 40 .
- the control member 25 such as, for example, a single filament or multifilament shaft or wire, may be flexible enough to pass through a tortuous body cavity, yet sufficiently stiff to resist minor compressive force, thereby permitting axial movement of the control member 25 relative to the tubular member 20 .
- the device 10 may optionally include an inner sleeve (not shown) fixedly secured to the movable member 37 of the handle assembly 30 and configured to move together with the control member 25 .
- the sleeve may be formed of a thermoplastic material, such as, for example, Nylon or Polyethylene, or a metal, such as, for example, stainless steel.
- control member 25 may be made of stainless steel, nickel-titanium alloy, or a combination of the two, but any other suitable material known in the art may also be used.
- at least a portion of the control member 25 or sleeve may be coated with a lubricating material to facilitate the axial movement of the control member 25 .
- the distal end of the control member 25 may be connected to the snare loop 40 via a suitable connector, such as a crimp ring 29 , so as to move the snare loop 40 in and out of the tubular member 20 to open and close the snare loop 40 .
- a suitable connector such as a crimp ring 29
- the snare loop 40 can be opened by extending the loop 40 distally out of the tubular member 20 and closed by retracting the snare loop 40 into the tubular member 20 .
- control member 25 may be coupled to the movable member 37 of the handle assembly 30 via a suitable coupling member, such as, for example, a rigid tube, the opening and closing operations of the snare loop 40 may be controlled by reciprocating the movable member 37 relative to the main body 35 and the tubular member 20 .
- the control member 25 may itself form a snare loop 40 at its distal end, instead of attaching a separate snare loop 40 .
- the snare loop 40 may be formed of an elastic material, such as, for example, stainless steel, nickel-titanium alloy, or any other materials that exhibit sufficient restorability of its original shape.
- the snare loop 40 may be formed of a single filament or braided multifilament wire.
- the size and shape of the snare loop 40 may vary significantly depending on the types and orientation of the polyps for which the device is used.
- the snare loop 40 may have an oval shape, hexagonal shape, duck-bill shape, crescent shape, or any other shape known in the art.
- at least a portion of the loop may be angled to facilitate removal of certain types of polyps.
- the nozzle member 50 is best shown in FIGS. 5 and 6 .
- the nozzle member 50 may be fixedly attached to a distal tip portion 49 of the snare loop 40 .
- the nozzle member 50 may be removably attached to the snare loop 40 and, if spraying of the fluid is not desired, the nozzle member 50 may be detached from the snare loop 40 .
- the nozzle member 50 may include a base portion 51 and a head portion 59 .
- the base portion 51 may have an outer diameter slightly less than the inner diameter of the tubular member 20 , so that the nozzle member 50 may be fit into the distal end portion of the tubular member 20 .
- the outer diameter of the base 51 may be equal to or greater than the inner diameter of the tube 20 .
- the base portion 51 may be provided with a suitable sealing member, such as, for example, a resilient sealing ring 53 , to provide leak-tight engagement between the nozzle member 50 and the distal end of the tubular member 20 .
- the base portion 51 may form a frusto-conical shape for enhanced engagement with the tubular member 20 .
- the head portion 59 may have a smooth outer profile, such as, for example, a hemi-spherical configuration, for ease of insertion through an endoscope lumen and a patient's tissue tract.
- the outer diameter of the head portion 59 may be substantially equal to or greater or less than the inner diameter of the tubular member 20 .
- the nozzle member 50 may include at least one internal flow path 55 for injecting the fluid flowed to the distal end of the tubular member 20 .
- the nozzle member 50 may include at least one through-hole 55 or an annular passage for spraying the fluid. Due to its smaller flow area relative to the flow area of the tubular member 20 , the nozzle member 50 may create a sufficient differential pressure across the inlet and outlet of the flow path 55 , thereby functioning as a spray nozzle for spraying the fluid. If the flow path is formed of an annular passage 55 , the nozzle member 50 may include at least one supporting rib for structurally supporting the center piece 57 to the rest of the nozzle member 50 .
- the nozzle member 50 may include a plurality of small diameter non-annular passages therethrough, or any other suitable number and type of passages through nozzle member 50 .
- the cross-sectional area of the flow path in the nozzle member 50 may be varied along the length of the flow path 155 depending on the desired fluid-dynamic effect.
- a nozzle member 150 , 250 may have various configurations for the internal flow path 155 , 255 .
- the internal flow path 155 is varied to create a nozzle-diffuser configuration where the annular flow path at the inlet 151 is converged at a portion 154 of the flow path 155 and diverged gradually therefrom to the exit 159 , thereby enhancing the spraying effect of the fluid.
- the internal flow path 255 may have a shower head configuration at the exit 259 , so that the fluid may be sprayed in a shower-like manner.
- FIGS. 3 , 4 , and 6 show a closed position of the snare loop 40 .
- the movable member 37 may be moved proximally relative to the main body 35 to retract the snare loop 40 inside the tubular member 20 , causing the snare loop 40 to close.
- the nozzle member 50 may then be snuggly received at the distal end portion of the tubular member 20 , ready for spraying the fluid.
- This closed position of the snare loop 40 may be the preferred position while inserting the device 10 into the body. With this position of the snare loop 40 , the device 10 may be inserted into an endoscope lumen to position the distal end of the device 10 near the tissue site.
- a suitable imaging device such as, for example, an endoscope, colonoscope, or sigmoidoscope, may be used to aid in positioning the distal end of the device 10 .
- the fluid supplying member 60 may be actuated to supply, for example, a suitable dye or radiographic contrast agent through the fluid connector 38 .
- the fluid may pass through the fluid chamber 65 of the handle assembly 30 and through the tubular member 20 , as indicated by the arrows in FIG. 7 .
- the fluid may then be sprayed by passing through the nozzle member 50 disposed at the distal end of the tubular member 20 to aid in visualization of the tissue site.
- FIGS. 1 , 2 , and 5 show an open position of the snare loop 40 , which may be used to perform such a polypectomy procedure.
- the movable member 37 may be moved distally relative to the main body 35 to extend the snare loop 40 beyond the distal end of the tubular member 20 , causing the snare loop 40 to open.
- the device 10 may be manipulated appropriately to receive tissue in the snare loop 40 .
- the nozzle member 50 in this position may not serve any function nor interfere with the operation of the polypectomy procedure. It should be understood, however, that it may be possible, if desired, to inject the fluid through the tubular member 20 in this open position. But, since the nozzle member is no longer associated with the tubular member 20 , the fluid may not have a nozzle-like effect.
- the movable member 37 may be moved proximally relative to the main body 35 to retract the snare loop 40 inside the tubular member 20 to cause the snare loop 40 to close, severing the tissue received in the snare loop 40 .
- the operator may repeat any portion of the medical procedure described above, in any order, as desired. For example, the operator may repeat the step of spraying fluid before, during, or after a given medical procedure, with the same fluid or with any other fluid.
- any other surgical procedures that involve injection of a fluid.
- any other fluids such as, for example, irrigation fluid, therapeutic agent, or other suitable treatment agents, may alternatively or additionally be sprayed, depending on the desired medical procedure.
- FIG. 9 illustrates an endoscopic device 300 according to another exemplary embodiment of the present invention.
- a nozzle member 350 may be fixedly secured to the distal end portion of the tubular member 320 and, thereby, the fluid may be sprayed when the snare loop 340 is in an open position.
- the nozzle member 350 may have a stepped proximal portion 351 to facilitate securing of the nozzle member 350 onto the tubular member 320 .
- Any suitable securing mechanism such as, for example, welding, crimping, gluing, etc., may be used to secure the nozzle member 350 onto the tubular member 320 .
- the nozzle member 350 may be formed integrally with the tubular member 320 .
- At least one flow path 355 may be formed internally inside the nozzle member 350 .
- the flow path 355 connects between the lumen of the tubular member 320 and the front surface of the tubular member 320 .
- Other various arrangements for the flow path 355 including those similar to the embodiments described with reference to FIGS. 5 , 8 A, and 8 B, may also be used instead.
- the nozzle member 350 may include a sealing member, such as, for example, an annular flange 359 , which cooperates with a corresponding sealing member 335 formed on the outer surface of a connecting member 329 that connects a snare loop 340 and the control member 325 .
- a suitable sealing member having a similar configuration may be used.
- the sealing members 359 , 335 may engage in a leak-proof manner so that the fluid may flow only through the flow path 355 formed inside the nozzle member 350 .
- Any suitable handle assembly including the handle assembly 30 described with reference to FIGS. 1-4 , may be used and, thereby, detailed description of the handle assembly is omitted.
- the device 300 may be inserted into an endoscope lumen to position the distal end of the device 300 near the tissue site.
- the closed position of the snare loop 340 may be the preferred position while inserting the device 300 into the body.
- the snare loop 340 may be extended distally out of the tubular member 320 to open the snare loop 340 , as shown in FIG. 9 .
- the annular flange 359 of the nozzle member 350 may cooperate with the sealing member 335 of the connecting member 329 so as to seal the distal end of the tubular member 335 and leave the flow path 355 formed inside the nozzle member 350 in fluid communication between the inside and outside of the tubular member 320 .
- a suitable fluid such as, for example, a dye or radiographic contrast agent, may then be supplied to the distal end portion of the tubular member 320 and may be sprayed through the flow path 355 of the nozzle member 350 at the distal end of the tubular member 320 .
- the fluid may also be injected when the snare loop 340 is in the closed position.
- the nozzle member 350 may permit a fluid flow through an opening formed by the annular flange 359 in the closed position.
- the restriction in the opening by the annular flange 359 may create a sufficient nozzle effect across the opening so that the fluid may be sprayed while passing through the opening.
- the snare loop 340 may be further manipulated to perform a desired surgical procedure, independent of the spraying operation.
- the snare loop 340 may receive tissue therein and be retracted inside the snare loop 340 to sever the tissue received. Since the nozzle member 350 is not directly associated with the snare loop 340 , the nozzle member 350 does not interfere with the operation of the snare loop.
- the operator may repeat any portion of the medical procedure described above, in any order, if desired. For example, the operator may repeat the step of spraying fluid before, during, or after the medical procedure with the same fluid or with any other suitable fluid.
- FIG. 10 illustrates an endoscopic device 400 according to still another exemplary embodiment of the present invention.
- a connector 450 between the snare loop 440 and the control member 425 may form a nozzle member 450 .
- the nozzle member 450 may have a plunger-like shape with a plate member at either a proximal or distal end (shown at the distal end of the nozzle member 450 in FIG. 10 ).
- the nozzle member 450 has at least one through-hole 455 through which the fluid may be sprayed.
- the nozzle member 450 may also have a sealing member (not shown) adjacent the surface in contact with the tubular member 420 , so as to seal the opening of the tubular member 420 except the through-hole 455 .
- the device 400 may have a stop member (not shown) at the distal end portion of the tubular member 420 , so that the nozzle member 450 may not move beyond the distal end of the tubular member 420 .
- a handle assembly may have a suitable limiting mechanism for limiting the axial movement of the nozzle member 450 .
- limiting the axial movement of the nozzle member 450 may be achieved by having the control member 425 with a predetermined length configured not to extend beyond the distal end of the tubular member 420 .
- the device 400 may be operated in any suitable manner, including the operation described above with reference to FIG. 9 , and, thereby, detailed description of the operation is omitted.
Abstract
Various embodiments of a surgical device that combines tissue cutting and spraying in a single device and related methods of use are disclosed. The device may include an elongated member having a proximal end and a distal end, an end effector proximate the distal end of the elongated member, and a nozzle member configured to substantially seal the distal end of the elongated member. The nozzle member may define a flow path in fluid communication between inside and outside of the elongated member when the distal end of the elongated member is sealed with the nozzle member.
Description
- This application is a continuation of U.S. application Ser. No. 10/760,520, filed Jan. 21, 2004, the entire disclosure of which is incorporated herein by reference.
- Embodiments of the present invention relate to a surgical instrument having a spray mechanism and related methods of use. In a particular embodiment, the present invention relates to an endoscopic device that combines tissue cutting and spraying in a single device for use in, for example, a colonoscopic polypectomy.
- Colon cancer, including colorectal cancer, is one of the leading causes of cancer deaths. Despite advancements in therapeutic treatment techniques, the mortality rate from colon cancer remains high, and effective preventive measures for reducing the mortality are highly desired. As one of the preventive measures, it has been suggested that early detection and removal of adenomas (adenomatous polyps) during a routine colonoscopy effectively reduces the incidence of cancer because the adenoma-carcinoma sequence is believed to be the precursors for the vast majority of colon cancers.
- Polypectomy is a therapeutic procedure typically used by a doctor to remove the adenomas from the colon or rectum. For example, once adenomas are detected during a routine colonoscopy or sigmoidoscopy, a doctor may insert a suitable polypectomy device, such as, for example, a snare catheter or biopsy forceps, to the site of the adenomas and remove the adenomas. However, while some of the adenomas are polypoid that are readily detectable, some adenomas are small sized, have a flat or depressed profile, or lack sufficient color contrast with respect to the surrounding mucosa, which render the detection of such adenomas extremely difficult and may require specialized techniques to detect them.
- Recent studies indicate that the use of a dye agent, such as, for example, indigo carmine (indigotine, E132), used in contrast chromoscopy techniques, sprayed onto the colonic surface increases the detection of previously unvisualized adenomas. For this purpose, a specially designed spray catheter is passed through the endoscope to apply the dye agent directly onto the colonic surface. Once adenomas are detected, however, this procedure may require withdrawal of the spray catheter from the endoscope in order to insert an appropriate polypectomy device.
- Therefore, an embodiment of the invention relates to an endoscopic device that can facilitate the above-mentioned procedure by combining the ability to perform polypectomy and dye spraying in a single device. Such an embodiment includes an endoscopic device having a spray mechanism integrally incorporated into the device, thereby eliminating the need for using a separate spray catheter.
- To attain the advantages and in accordance with the purpose of the invention, as embodied and broadly described herein, one aspect of the invention may provide a medical device including a proximal handle, a distal assembly for performing a medical procedure, and an elongated member having a lumen and connecting the proximal handle to the distal assembly, where actuation of the proximal handle causes the distal assembly to perform the medical procedure. The distal assembly may include an end effector and a distal member defining a flow path therein for fluid communication between the lumen and an outside of the elongated member. The flow path may have a cross-sectional flow area less than a cross-sectional flow area of the lumen.
- Another aspect of the present invention may provide a medical device including an elongated member having a proximal end, a distal end, and a lumen therethrough, an end effector proximate the distal end of the elongated member, and a nozzle member configured to substantially seal the distal end of the lumen. The nozzle member may define a flow path in fluid communication between the lumen and an outside of the elongated member when the distal end of the lumen is sealed with the nozzle member.
- In yet another aspect of the present invention, a method of performing a medical procedure may be provided. The method includes inserting a medical device into a tissue tract of a patient, spraying fluid through a lumen of the medical device and onto tissue of the tissue tract to enhance visualization of tissue of the tissue tract, and actuating an end effector of the medical device to perform the medical procedure.
- In still another aspect of the present invention, a method of performing a medical procedure may include inserting a medical device into a patient, where the medical device includes an elongated member having a lumen, an end effector proximate a distal end of the elongated member, and a distal member configured to substantially seal the distal end of the lumen. The nozzle member may define a flow path in fluid communication between the lumen and an outside of the elongated member when the lumen is sealed with the nozzle member. The method may further include injecting fluid through the distal member of the medical device and actuating the end effector to perform the medical procedure.
- Additional objects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objects and advantages of the invention will be realized and attained by means of the elements and combinations particularly pointed out in the appended claims.
- It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as claimed.
- The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate several embodiments of the invention and, together with the description, serve to explain the principles of the invention.
- In the drawings:
-
FIGS. 1 and 2 are top and side views of a snare catheter having a spray mechanism, according to an embodiment of the present invention, illustrating an open position of the snare catheter; -
FIGS. 3 and 4 are top and side views of the snare catheter shown inFIG. 1 , illustrating a closed position of the snare catheter; -
FIG. 5 is an exploded cross-sectional view of a distal portion of the snare catheter shown inFIGS. 1 and 2 ; -
FIG. 6 is an exploded cross-sectional view of a distal portion of the snare catheter shown inFIGS. 3 and 4 ; -
FIG. 7 is an exploded partial cross-sectional view of the proximal portion of the snare catheter shown inFIGS. 1-4 , illustrating the fluid flow path from a fluid supply source to a tubular member of the catheter, according to an embodiment of the present invention; -
FIGS. 8A and 8B are cross-sectional views of nozzle members, according to various embodiments of the present invention; -
FIG. 9 is an exploded partial cross-sectional view of a distal portion of a snare catheter, according to another embodiment of the present invention; and -
FIG. 10 is an exploded cross-sectional view of a distal portion of a snare catheter, according to still another embodiment of the present invention. - Reference will now be made in detail to the exemplary embodiments of the invention, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numbers will be used throughout the drawings to refer to the same or like parts.
-
FIGS. 1-6 illustrate anendoscopic device 10 according to an exemplary embodiment of the present invention, which incorporates a spray mechanism integrally with a tissue acquisition or cutting device, such as, for example, a polypectomy snare catheter. While the present invention will be described in connection with a particular snare catheter, the present invention may be applied to, or used in connection with, any other types of snare catheters, numerous other tissue cutting end effector devices, such as biopsy forceps, jaws, or scissors, or other medical devices, including endoscopic medical devices, that may be used in combination with a spray mechanism. These include, but are not limited to, graspers, injection needles, hemostasis clips, and balloon dilation devices. - As best shown in
FIGS. 1-4 , theendoscopic device 10 may include an elongated flexibletubular member 20, ahandle assembly 30, an end effector, such assnare loop 40, and anozzle member 50 attached to a distal tip 49 (as shown inFIG. 5 ) of thesnare loop 40. Thedevice 10 may also include aflexible control member 25 extending between thehandle assembly 30 and thesnare loop 40 through a lumen of thetubular member 20. While the exemplary embodiment shown inFIGS. 1-4 includes thenozzle member 50, a device of the invention may not include thenozzle member 50, such that the fluid may exit the distal end of thetubular member 20 in a stream-like manner without a nozzle-induced spray effect. - The elongated flexible
tubular member 20 may be fixedly secured to thehandle assembly 30 via a suitable connection mechanism known in the art. Thetubular member 30 may be made of a thermoplastic material, such as, for example, Teflon® or PTFE, but other suitable material known in the art may also be used instead. Thetubular member 20 may, for example, be a metal coil and may include suitable biocompatible coatings. The dimensions of thetubular member 20 may vary depending upon the type of procedure being performed. In an exemplary embodiment, the outer diameter and length of the tubular member range from 2.0 mm to 2.5 mm, and from 200 cm to 250 cm, respectively. Thetubular member 20 preferably has sufficient flexibility to traverse tortuous anatomy. - The
handle assembly 30 may include athumb ring 31 fixedly attached to amain body 35. Theassembly 30 may further include amovable member 37 having a suitable finger grip, such as, for example, a pair offinger rings 36. Themain body 35 may be provided with aslide guide 33 along which themovable member 37 may reciprocally move relative to themain body 35 and thetubular member 20. Themovable member 37 may also be configured to be rotatable with respect to the axis of themain body 35 so as to control the orientation of thesnare loop 40 and/or thenozzle member 50. As will be described herein, this reciprocal movement of themovable member 37 controls the opening and closing of thesnare loop 40. - The
handle assembly 30 may include afluid connector 38 which may be used to connect to a source of fluid 60 (seeFIG. 4 ) intended to be sprayed by thedevice 10. Although thefluid connector 38 is shown to extend perpendicularly from the transverse axis of thehandle assembly 30, any other types of connections known in the art may be employed. The fluid to be sprayed may be supplied by a suitable pressurizing means. For example, in an embodiment shown inFIG. 4 , the fluid may be injected into thedevice 10 by asyringe 60, but any other suitable fluid supplying member may be alternatively used. Thefluid connector 38 may include a suitable interlocking mechanism (not shown) associated with a fluid supplying member, such as a luer lock, so as to provide a leak-proof fluid connection between thedevice 10 and thefluid supplying member 60. Various seal members may also be provided to enhance the leak-proof fluid connection. When thefluid connector 38 is not in use, thefluid connector 38 may be provided with a stopper or cap (not shown) to close the opening of theconnector 38. - The distal portion of the
handle assembly 30 may include afluid chamber 65 for temporarily storing the fluid injected from thefluid supplying member 60 and directing the fluid to thetubular member 20, as shown inFIG. 7 . Thefluid chamber 65 may be separated from the proximal portion of thehandle assembly 30 by anannular flange 64 and a sealing member, such as, for example, a sealingring 62, so that the fluid injected into thefluid chamber 65 does not penetrate into the proximal portion of thehandle assembly 30. Theannular flange 64 may form acircumferential groove 63 on an inner surface of theflange 64 to accommodate the sealingring 62, thereby preventing axial movement of the sealingring 62. Alternatively, the distal portion of thehandle assembly 30 may include a tube extending from thefluid connector 38 to the proximal or distal end of thetubular member 20. - The
handle assembly 30 may also include anelectrical connector 32 for receiving cautery current from a power supply source (not shown) for an electrosurgical application. Other suitable electrical connectors, such as the embodiments described in U.S. Pat. No. 5,575,694 to Hawkins et al., entitled “Electrical Connector for Attachment to a Medical Device,” the disclosure of which is hereby incorporated by reference, can also be used. Thehandle assembly 30 shown and described inFIGS. 1-4 is exemplary. Other handles known in the art that can actuate a distal end effector assembly and that also can include a fluid port may be used. For example, a handle assembly may also include a separate rotation actuator (not shown) for controlling a rotational movement of thesnare loop 40 or may have a scissors-like actuation mechanism or different actuation mechanism for operating thesnare loop 40. - The
control member 25, such as, for example, a single filament or multifilament shaft or wire, may be flexible enough to pass through a tortuous body cavity, yet sufficiently stiff to resist minor compressive force, thereby permitting axial movement of thecontrol member 25 relative to thetubular member 20. For this purpose, thedevice 10 may optionally include an inner sleeve (not shown) fixedly secured to themovable member 37 of thehandle assembly 30 and configured to move together with thecontrol member 25. The sleeve may be formed of a thermoplastic material, such as, for example, Nylon or Polyethylene, or a metal, such as, for example, stainless steel. In an exemplary embodiment, thecontrol member 25 may be made of stainless steel, nickel-titanium alloy, or a combination of the two, but any other suitable material known in the art may also be used. In another exemplary embodiment, at least a portion of thecontrol member 25 or sleeve may be coated with a lubricating material to facilitate the axial movement of thecontrol member 25. - The distal end of the
control member 25 may be connected to thesnare loop 40 via a suitable connector, such as acrimp ring 29, so as to move thesnare loop 40 in and out of thetubular member 20 to open and close thesnare loop 40. Alternatively, as best shown inFIGS. 5 and 6 , thesnare loop 40 can be opened by extending theloop 40 distally out of thetubular member 20 and closed by retracting thesnare loop 40 into thetubular member 20. Since thecontrol member 25 may be coupled to themovable member 37 of thehandle assembly 30 via a suitable coupling member, such as, for example, a rigid tube, the opening and closing operations of thesnare loop 40 may be controlled by reciprocating themovable member 37 relative to themain body 35 and thetubular member 20. In an alternative exemplary embodiment, thecontrol member 25 may itself form asnare loop 40 at its distal end, instead of attaching aseparate snare loop 40. - The
snare loop 40 may be formed of an elastic material, such as, for example, stainless steel, nickel-titanium alloy, or any other materials that exhibit sufficient restorability of its original shape. Thesnare loop 40 may be formed of a single filament or braided multifilament wire. The size and shape of thesnare loop 40 may vary significantly depending on the types and orientation of the polyps for which the device is used. In various exemplary embodiments, thesnare loop 40 may have an oval shape, hexagonal shape, duck-bill shape, crescent shape, or any other shape known in the art. Optionally, at least a portion of the loop may be angled to facilitate removal of certain types of polyps. - The
nozzle member 50, according to an exemplary embodiment of the invention, is best shown inFIGS. 5 and 6 . Thenozzle member 50 may be fixedly attached to adistal tip portion 49 of thesnare loop 40. Alternatively, thenozzle member 50 may be removably attached to thesnare loop 40 and, if spraying of the fluid is not desired, thenozzle member 50 may be detached from thesnare loop 40. - The
nozzle member 50 may include abase portion 51 and ahead portion 59. Thebase portion 51 may have an outer diameter slightly less than the inner diameter of thetubular member 20, so that thenozzle member 50 may be fit into the distal end portion of thetubular member 20. In an alternative embodiment, the outer diameter of the base 51 may be equal to or greater than the inner diameter of thetube 20. Optionally, thebase portion 51 may be provided with a suitable sealing member, such as, for example, aresilient sealing ring 53, to provide leak-tight engagement between thenozzle member 50 and the distal end of thetubular member 20. In an alternative embodiment, thebase portion 51 may form a frusto-conical shape for enhanced engagement with thetubular member 20. Thehead portion 59, preferably formed integrally with thebase portion 51, may have a smooth outer profile, such as, for example, a hemi-spherical configuration, for ease of insertion through an endoscope lumen and a patient's tissue tract. The outer diameter of thehead portion 59 may be substantially equal to or greater or less than the inner diameter of thetubular member 20. - The
nozzle member 50 may include at least oneinternal flow path 55 for injecting the fluid flowed to the distal end of thetubular member 20. For example, as shown inFIGS. 5 and 6 , thenozzle member 50 may include at least one through-hole 55 or an annular passage for spraying the fluid. Due to its smaller flow area relative to the flow area of thetubular member 20, thenozzle member 50 may create a sufficient differential pressure across the inlet and outlet of theflow path 55, thereby functioning as a spray nozzle for spraying the fluid. If the flow path is formed of anannular passage 55, thenozzle member 50 may include at least one supporting rib for structurally supporting thecenter piece 57 to the rest of thenozzle member 50. - Alternatively or additionally, the
nozzle member 50 may include a plurality of small diameter non-annular passages therethrough, or any other suitable number and type of passages throughnozzle member 50. - In addition, the cross-sectional area of the flow path in the
nozzle member 50 may be varied along the length of theflow path 155 depending on the desired fluid-dynamic effect. For example, as shown inFIGS. 8A and 8B , anozzle member internal flow path FIG. 8A , theinternal flow path 155 is varied to create a nozzle-diffuser configuration where the annular flow path at theinlet 151 is converged at a portion 154 of theflow path 155 and diverged gradually therefrom to theexit 159, thereby enhancing the spraying effect of the fluid. Alternatively, as show inFIG. 8B , theinternal flow path 255 may have a shower head configuration at theexit 259, so that the fluid may be sprayed in a shower-like manner. - The operation of the device will be described in detail with reference to
FIGS. 1-7 .FIGS. 3 , 4, and 6 show a closed position of thesnare loop 40. To attain this position, themovable member 37 may be moved proximally relative to themain body 35 to retract thesnare loop 40 inside thetubular member 20, causing thesnare loop 40 to close. As best shown inFIG. 6 , thenozzle member 50 may then be snuggly received at the distal end portion of thetubular member 20, ready for spraying the fluid. - This closed position of the
snare loop 40 may be the preferred position while inserting thedevice 10 into the body. With this position of thesnare loop 40, thedevice 10 may be inserted into an endoscope lumen to position the distal end of thedevice 10 near the tissue site. A suitable imaging device, such as, for example, an endoscope, colonoscope, or sigmoidoscope, may be used to aid in positioning the distal end of thedevice 10. Once the distal end of thedevice 10 is properly positioned, thefluid supplying member 60 may be actuated to supply, for example, a suitable dye or radiographic contrast agent through thefluid connector 38. Upon actuation of thefluid supplying member 60, the fluid may pass through thefluid chamber 65 of thehandle assembly 30 and through thetubular member 20, as indicated by the arrows inFIG. 7 . The fluid may then be sprayed by passing through thenozzle member 50 disposed at the distal end of thetubular member 20 to aid in visualization of the tissue site. - With the enhanced visualization of the tissue site, the operator may perform a suitable surgical procedure, such as, for example, a polypectomy procedure, with the
device 10 without requiring withdrawal of thedevice 10 from the tissue site.FIGS. 1 , 2, and 5 show an open position of thesnare loop 40, which may be used to perform such a polypectomy procedure. To attain this position, themovable member 37 may be moved distally relative to themain body 35 to extend thesnare loop 40 beyond the distal end of thetubular member 20, causing thesnare loop 40 to open. In this position, thedevice 10 may be manipulated appropriately to receive tissue in thesnare loop 40. Thenozzle member 50 in this position may not serve any function nor interfere with the operation of the polypectomy procedure. It should be understood, however, that it may be possible, if desired, to inject the fluid through thetubular member 20 in this open position. But, since the nozzle member is no longer associated with thetubular member 20, the fluid may not have a nozzle-like effect. - Once the tissue is received in the
snare loop 40, themovable member 37 may be moved proximally relative to themain body 35 to retract thesnare loop 40 inside thetubular member 20 to cause thesnare loop 40 to close, severing the tissue received in thesnare loop 40. The operator may repeat any portion of the medical procedure described above, in any order, as desired. For example, the operator may repeat the step of spraying fluid before, during, or after a given medical procedure, with the same fluid or with any other fluid. - Although the present invention was described in connection with a particular polypectomy procedure, the present invention may be applied to, or used in connection with, any other surgical procedures that involve injection of a fluid. For example, instead of spraying the dye agent for the visualization purpose, any other fluids, such as, for example, irrigation fluid, therapeutic agent, or other suitable treatment agents, may alternatively or additionally be sprayed, depending on the desired medical procedure.
-
FIG. 9 illustrates anendoscopic device 300 according to another exemplary embodiment of the present invention. In this embodiment, anozzle member 350 may be fixedly secured to the distal end portion of thetubular member 320 and, thereby, the fluid may be sprayed when thesnare loop 340 is in an open position. Thenozzle member 350 may have a steppedproximal portion 351 to facilitate securing of thenozzle member 350 onto thetubular member 320. Any suitable securing mechanism, such as, for example, welding, crimping, gluing, etc., may be used to secure thenozzle member 350 onto thetubular member 320. Alternatively, thenozzle member 350 may be formed integrally with thetubular member 320. - At least one
flow path 355 may be formed internally inside thenozzle member 350. In the exemplary embodiment shown inFIG. 9 , theflow path 355 connects between the lumen of thetubular member 320 and the front surface of thetubular member 320. Other various arrangements for theflow path 355, including those similar to the embodiments described with reference toFIGS. 5 , 8A, and 8B, may also be used instead. Thenozzle member 350 may include a sealing member, such as, for example, anannular flange 359, which cooperates with a corresponding sealingmember 335 formed on the outer surface of a connectingmember 329 that connects asnare loop 340 and thecontrol member 325. In an embodiment in which thecontrol member 325 also forms thesnare loop 340, a suitable sealing member having a similar configuration may be used. The sealingmembers flow path 355 formed inside thenozzle member 350. Any suitable handle assembly, including thehandle assembly 30 described with reference toFIGS. 1-4 , may be used and, thereby, detailed description of the handle assembly is omitted. - In operation, the
device 300 may be inserted into an endoscope lumen to position the distal end of thedevice 300 near the tissue site. The closed position of thesnare loop 340 may be the preferred position while inserting thedevice 300 into the body. Once the distal end of thedevice 300 is properly positioned, thesnare loop 340 may be extended distally out of thetubular member 320 to open thesnare loop 340, as shown inFIG. 9 . In this open position, theannular flange 359 of thenozzle member 350 may cooperate with the sealingmember 335 of the connectingmember 329 so as to seal the distal end of thetubular member 335 and leave theflow path 355 formed inside thenozzle member 350 in fluid communication between the inside and outside of thetubular member 320. - A suitable fluid, such as, for example, a dye or radiographic contrast agent, may then be supplied to the distal end portion of the
tubular member 320 and may be sprayed through theflow path 355 of thenozzle member 350 at the distal end of thetubular member 320. While the open position of thesnare loop 340 is the preferred position for spraying, the fluid may also be injected when thesnare loop 340 is in the closed position. For example, thenozzle member 350 may permit a fluid flow through an opening formed by theannular flange 359 in the closed position. Preferably, the restriction in the opening by theannular flange 359 may create a sufficient nozzle effect across the opening so that the fluid may be sprayed while passing through the opening. - Once the suitable fluid is sprayed, the
snare loop 340 may be further manipulated to perform a desired surgical procedure, independent of the spraying operation. For example, thesnare loop 340 may receive tissue therein and be retracted inside thesnare loop 340 to sever the tissue received. Since thenozzle member 350 is not directly associated with thesnare loop 340, thenozzle member 350 does not interfere with the operation of the snare loop. The operator may repeat any portion of the medical procedure described above, in any order, if desired. For example, the operator may repeat the step of spraying fluid before, during, or after the medical procedure with the same fluid or with any other suitable fluid. -
FIG. 10 illustrates anendoscopic device 400 according to still another exemplary embodiment of the present invention. In this embodiment, aconnector 450 between the snare loop 440 and thecontrol member 425 may form anozzle member 450. Thenozzle member 450 may have a plunger-like shape with a plate member at either a proximal or distal end (shown at the distal end of thenozzle member 450 inFIG. 10 ). Thenozzle member 450 has at least one through-hole 455 through which the fluid may be sprayed. Thenozzle member 450 may also have a sealing member (not shown) adjacent the surface in contact with thetubular member 420, so as to seal the opening of thetubular member 420 except the through-hole 455. - The
device 400 may have a stop member (not shown) at the distal end portion of thetubular member 420, so that thenozzle member 450 may not move beyond the distal end of thetubular member 420. Alternatively or additionally, a handle assembly may have a suitable limiting mechanism for limiting the axial movement of thenozzle member 450. Optionally or in alternative, limiting the axial movement of thenozzle member 450 may be achieved by having thecontrol member 425 with a predetermined length configured not to extend beyond the distal end of thetubular member 420. Thedevice 400 may be operated in any suitable manner, including the operation described above with reference toFIG. 9 , and, thereby, detailed description of the operation is omitted. - Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.
Claims (20)
1. An endoscopic device, comprising:
a tubular member;
a handle coupled to the tubular member;
a control member extending through the tubular member;
a snare loop coupled to a distal end of the control member; and
a nozzle member disposed at a distal tip of the snare loop.
2. The endoscopic device of claim 1 , wherein the nozzle member defines a fluid flow path therethrough.
3. The endoscopic device of claim 1 , wherein the nozzle member defines a plurality of fluid flow paths therethrough.
4. The endoscopic device of claim 1 , wherein the nozzle member has a base portion and a head portion, and wherein the base portion has an outer diameter that is less than an inner diameter of the tubular member.
5. The endoscopic device of claim 1 , wherein the nozzle member includes a proximal seal that is configured to seal against the tubular member.
6. The endoscopic device of claim 1 , wherein the handle includes a thumb ring and a movable member.
7. The endoscopic device of claim 1 , wherein the handle includes a fluid connector that is configured to be coupled to a fluid source.
8. The endoscopic device of claim 7 , wherein the fluid source includes a syringe.
9. The endoscopic device of claim 1 , wherein a distal portion of the handle includes a fluid chamber for storing fluid.
10. The endoscopic device of claim 1 , wherein the handle includes an electrical connector.
11. The endoscopic device of claim 1 , wherein the control member is a single filament wire.
12. The endoscopic device of claim 1 , wherein the control member is a multifilament wire.
13. The endoscopic device of claim 1 , wherein the snare loop is coupled to the control member with a crimp ring.
14. An endoscopic device, comprising:
a tubular member;
a control member extending through the tubular member;
a snare loop coupled to a distal end of the control member, the snare loop having a distal tip;
wherein the snare loop is configured to shift between a first configuration where the snare loop is disposed in the tubular member and a second configuration where the snare loop is disposed distally of a distal end of the tubular member; and
a nozzle member attached to the distal tip, the nozzle member defining a fluid pathway therethrough.
15. The endoscopic device of claim 14 , wherein the nozzle member defines a plurality of fluid flow paths therethrough.
16. The endoscopic device of claim 14 , wherein the nozzle member has a base portion and a head portion, and wherein the base portion has an outer diameter that is less than an inner diameter of the tubular member.
17. The endoscopic device of claim 14 , wherein the nozzle member has a base portion that is configured to seal against the tubular member.
18. The endoscopic device of claim 17 , wherein the base portion is sealed against the tubular member when the snare loop is in the first configuration.
19. The endoscopic device of claim 14 , wherein a handle is attached to the tubular member, the handle having a fluid connector that is configured to connect with a fluid source.
20. An endoscopic device, comprising:
a tubular member having a proximal end, a distal end, and a lumen extending therebetween;
a control member extending through the lumen;
wherein a snare loop is disposed at a distal end of the control member;
wherein the snare loop is configured to shift between a first configuration where the snare loop is disposed in the tubular member and a second configuration where the snare loop is disposed distally of the distal end of the tubular member;
a handle coupled to the tubular member;
wherein the handle includes an actuation mechanism that is configured to shift the snare loop between the first configuration and the second configuration;
a nozzle member attached to the snare loop, the nozzle member defining a fluid pathway therethrough; and
wherein the nozzle member includes base portion that is configured to seal against the tubular member when the snare loop is in the first configuration.
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Also Published As
Publication number | Publication date |
---|---|
US20050159648A1 (en) | 2005-07-21 |
JP2007521870A (en) | 2007-08-09 |
AU2005209235A1 (en) | 2005-08-11 |
EP1708635A1 (en) | 2006-10-11 |
WO2005072635A1 (en) | 2005-08-11 |
US7951073B2 (en) | 2011-05-31 |
CA2549348A1 (en) | 2005-08-11 |
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