Distal wire stop

• US 20050143770A1
• Filed: 12/07/2004
• Published: 06/30/2005
• Est. Priority Date: 07/31/2003
• Status: Active Grant

• Current Assignee: Cook Medical Incorporated (Cook Group Incorporated)
• Original Assignee: Cook Medical Incorporated (Cook Group Incorporated)
• Inventors: Kennedy, Kenneth C. II, Ayala, Juan Carlos, Deal, Stephen E., Rucker, Brian K., Carter, Matthew P., Haller, Frederick B.
• Granted Patent: US 8,211,087 B2
• Time in Patent Office: Days
• US Class Current: 606/170
• CPC Class Codes: A61B 1/018 for receiving instruments
• CPC Class Codes: A61B 17/221 Gripping devices in the form of loops or baskets for gripping calculi or similar types of obstructions surgical snare instruments A61B17/32056
• CPC Class Codes: A61B 2017/2212 having a closed distal end, e.g. a loop
• CPC Class Codes: A61B 6/12 Arrangements for detecting or locating foreign bodies
• CPC Class Codes: A61F 2/95 Instruments specially adapted for placement or removal of stents or stent-grafts
• CPC Class Codes: A61F 2002/041 Bile ducts
• CPC Class Codes: A61F 2002/9511 the retaining means being filaments or wires
• CPC Class Codes: A61M 2025/0006 which can be secured against axial movement, e.g. by using a locking cuff
• CPC Class Codes: A61M 2025/0025 having a collapsible lumen
• CPC Class Codes: A61M 2025/0059 having means for preventing the catheter, sheath or lumens from collapsing due to outer forces, e.g. compressing forces, or caused by twisting or kinking
• CPC Class Codes: A61M 2025/0177 having external means for receiving guide wires, wires or stiffening members, e.g. loops, clamps or lateral tubes
• CPC Class Codes: A61M 2025/0183 Rapid exchange or monorail catheters
• CPC Class Codes: A61M 2025/0681 Systems with catheter and outer tubing, e.g. sheath, sleeve or guide tube
• CPC Class Codes: A61M 2025/09125 Device for locking a guide wire in a fixed position with respect to the catheter or the human body
• CPC Class Codes: A61M 25/0029 characterized by features relating to least one lumen located at the middle part of the catheter, e.g. slots, flaps, valves, cuffs, apertures, notches, grooves or rapid exchange ports catheter shaft surface irregularities A61M2025/006
• CPC Class Codes: A61M 25/0102 Insertion or introduction using an inner stiffening member, e.g. stylet or push-rod
• CPC Class Codes: A61M 25/0169 Exchanging a catheter while keeping the guidewire in place
• CPC Class Codes: A61M 25/0662 Guide tubes
• CPC Class Codes: A61M 25/10 Balloon catheters A61M25/0125 takes precedence; embolectomy A61B17/22032; retractors A61B17/02; inflatable balloons for placing stents or stent-grafts A61F2/958 ; stomach balloons for treatment of obesity A61F5/0003; oesophagal tubes A61J15/00

Abstract

A method and apparatus for releasably securing a wire guide to an elongate medical device for introduction into a work site with the bodily lumen of a patient. An elongate engagement member is configured to engage the wire guide while it is coupled to the elongate medical device and is configured so as to prevent relative movement between the wire guide and the elongate medical device.

Claims

1. An elongate engagement member for use with an elongate medical device comprising tubular member having a coupling region configured to couple with a wire guide, the coupling region being disposed near a distal end of the tubular member,

wherein the elongate engagement member is configured to engage and releasably secure a wire guide coupled with the elongate medical device and prevent relative movement between the wire guide and the elongate medical device.

2. The elongate engagement member of claim 1, wherein the elongate engagement member comprises an elongate shaft, the elongate shaft having a distal end configured to frictionally engage an exterior surface of the wire guide and an inner wall of a passageway within the tubular member.

3. The elongate engagement member of claim 2, wherein the distal end of the shaft is configured to engage a portion of the wire guide that is disposed within the passageway of the tubular member.

4. The elongate engagement member of claim 2, wherein the elongate shaft further comprises a proximal end configured to releasably engage with a proximal port of the elongate medical device.

5. The elongate engagement member of claim 2, wherein the elongate shaft comprises a plurality of shaft sections having different physical properties.

6. The elongate engagement member of claim 5, wherein the plurality of shaft sections comprise a plurality of materials.

7. The elongate engagement member of claim 5, wherein the plurality of shaft sections comprise a plurality of cross-sectional areas.

8. The elongate engagement member of claim 2, wherein the elongate shaft comprises a taper having a decreasing cross-section towards the distal end thereof.

9. The elongate engagement member of claim 2, wherein the elongate shaft comprises a non-circular cross-section.

10. The elongate engagement member of claim 9, wherein the non-circular cross-section of the elongate shaft is configured to slidably extend through a correspondingly shaped passageway of the tubular member.

11. The elongate engagement member of claim 2, wherein the elongate shaft comprises a radiopaque marker disposed near the distal end thereof.

12. The elongate engagement member of claim 1, wherein the elongate engagement member comprises a tether, the tether having a distal loop configured to wrap at least partially about the wire guide and apply a lateral force thereto that is sufficient to force the wire guide into frictional engagement with a portion of the tubular member.

13. The elongate engagement member of claim 12, wherein the tether is configured to pass through a passageway within the tubular member of the elongate medical device.

14. The elongate engagement member of claim 13, wherein the tether further comprises a proximal end portion configured to releasably engage with a proximal port of the elongate medical device.

15. The elongate engagement member of claim 1, wherein the elongate medical device comprises a first lumen, a second lumen, and an internal wall disposed the first lumen and the second lumen, further wherein the elongate engagement member comprises an elongate shaft configured to be disposed with the second lumen, the elongate shaft having a distal end portion configured to engage and displace the internal wall into the first lumen, the internal wall when so displaced engaging an exterior surface of the wire guide.

16. The elongate engagement member of claim 15, wherein the second lumen comprises a decreasing cross-section along a portion thereof, the decreasing cross-section being configured to for engagement with the distal end portion of the elongate shaft, the engagement causing displacement of the internal wall into the first lumen.

17. The elongate engagement member of claim 15, wherein the distal end portion of the elongate shaft comprises an expandable member for engaging and displacing the internal wall into the first lumen.

18. A system for introducing multiple medical devices into a work site within a bodily lumen of a patient comprising:

an elongate medical device comprising a tubular shaft extending between a distal end and a proximal end, a lumen extending through at least a portion of the tubular shaft, the lumen comprising a coupling region extending between a distal opening and a proximal opening;

a wire guide comprising a shaft extending between a distal end and a proximal end, the shaft configure to slidably extend through the lumen of the elongate medical device; and

an elongate engagement member,

wherein the wire guide is movable from a coupled position to an uncoupled position, the wire guide extending through the coupling region of the elongated medical device when in the coupled position, the wire guide not extending through the coupling region of the elongated medical device when in the uncoupled position, and

wherein the elongate engagement member is configured to engage and releasably secure the wire guide in the coupled position and prevent relative movement between the wire guide and the elongate medical device.

19. The system of claim 18, wherein the elongate engagement member comprises an elongate shaft, the elongate shaft having a distal end configured to frictionally engage an exterior surface of the wire guide and an inner wall of the tubular shaft within the coupling region of the elongate medical device.

20. The system of claim 19, wherein the distal end of the shaft is configured to engage a portion of the wire guide that is disposed within the lumen of the coupling region of the elongate medical device.

21. The system of claim 19, wherein the elongate shaft further comprises a proximal end configured to releasably engage with a proximal port of the elongate medical device, the proximal port being spaced apart from and proximal to the proximally opening.

22. The system of claim 19, wherein the elongate shaft comprises a plurality of shaft sections having different physical properties.

23. The system of claim 22, wherein the plurality of shaft sections comprise a plurality of materials.

24. The system of claim 22, wherein the plurality of shaft sections comprise a plurality of cross-sectional areas.

25. The system of claim 19, wherein the elongate shaft comprises a taper having a decreasing cross-section towards the distal end thereof.

26. The system of claim 19, wherein the elongate shaft comprises a non-circular cross-section.

27. The system of claim 26, wherein the lumen of the elongate medical device comprises a non-circular cross-section that corresponds with that of the elongate shaft.

28. The system of claim 19, wherein the elongate shaft comprises a radiopaque marker disposed near the distal end thereof.

29. The system of claim 18, wherein the elongate engagement member comprises a tether, the tether having a distal loop configured to wrap at least partially about the wire guide and apply a lateral force thereto that is sufficient to force the wire guide into frictional engagement with a portion of the tubular shaft of the elongate medical device.

30. The system of claim 29, wherein the tether is configured to pass through the lumen of the tubular shaft of the elongate medical device.

31. The system of claim 30, wherein the tether further comprises a proximal end portion configured to releasably engage with a proximal port of the elongate medical device, the proximal port being spaced apart from and proximal to the proximally opening.

32. A method of introducing multiple medical devices into a work site within a bodily lumen of a patient, comprising the steps of:

a. providing an elongate medical device comprising a tubular shaft having a distal portion, a proximal portion, and a lumen extending therethrough, the distal portion comprising a coupling region;

b. providing a wire guide comprising a wire guide shaft extending between a distal end and a proximal end;

c. providing an elongate engagement member having a distal end portion and proximal end portion;

d. releasably coupling the wire guide to the elongate medical device by engaging the wire guide with the coupling region of the elongate medical device;

e. engaging the wire guide with the elongate engagement member so as to releasably secure the wire guide in the coupled position and prevent relative movement between the wire guide and the elongate medical device;

f. advancing the elongate medical device, the wire guide, and the elongate engagement member to the work site.

33. The method of claim 32, wherein elongate engagement member comprises an elongate shaft, and wherein the step of engaging the wire guide with the elongate engagement member includes the step of frictionally engaging a portion of the wire guide disposed within the coupling region of the elongate medical device with the distal end portion of the shaft of the elongate engagement member.

34. The method of claim 32, wherein elongate engagement member comprises an elongate shaft, and wherein the step of engaging the wire guide with the elongate engagement member includes the step of distally advancing the shaft of the elongate engagement member through the lumen of the elongate medical device.

35. The method of claim 32, wherein elongate engagement member comprises a tether having a loop on the distal end portion, and wherein the step of engaging the wire guide with the elongate engagement member includes the step of releasably engaging the wire guide with the loop of the elongate engagement member and applying a lateral force thereto that is sufficient to force the wire guide into frictional engagement with a portion of the tubular shaft.