Wire and lock mechanism

• US 20030176887A1
• Filed: 01/28/2003
• Published: 09/18/2003
• Est. Priority Date: 03/06/2001
• Status: Active Grant

• Current Assignee: Boston Scientific Scimed, Inc. (Boston Scientific Corporation)
• Original Assignee: Scimed Life Systems Incorporated (Boston Scientific Corporation)
• Inventors: Petersen, Scott R.
• Granted Patent: US 6,991,642 B2
• Time in Patent Office: Days
• US Class Current: 606/200
• CPC Class Codes: A61B 2017/00469 for insertion of instruments, e.g. guide wire, optical fibre
• CPC Class Codes: A61B 2017/347 Locking means, e.g. for locking instrument in cannula
• CPC Class Codes: A61F 2/011 Instruments for their placement or removal
• CPC Class Codes: A61F 2/013 Distal protection devices, i.e. devices placed distally in combination with another endovascular procedure, e.g. angioplasty or stenting
• CPC Class Codes: A61F 2/95 Instruments specially adapted for placement or removal of stents or stent-grafts
• CPC Class Codes: A61F 2230/0006 circular
• 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 2025/09183 having tools at the distal tip

Abstract

Methods and devices for delivering and/or retrieving a filter fixed to a guidewire disposed within a blood vessel are disclosed. A system in accordance with the present invention comprises, an outer shaft having a proximal end, distal end and a wall defining an outer shaft lumen. The system also includes a stop mechanism disposed within the outer shaft lumen. The stop mechanism is preferably configured such that relative axial movement between the guidewire and the outer shaft may be selectively precluded.

Claims

1. A system for manipulating a filter fixed to a guidewire disposed within a blood vessel, comprising:

an outer shaft having a proximal end, distal end and a wall defining a shaft lumen;

a proximal guidewire port extending through the wall of the outer shaft for allowing the guidewire to pass through the wall so that it is partially disposed within the shaft lumen; and

a stop mechanism coupled to the outer shaft distally of the proximal guidewire port.

2. The system of claim 1, wherein the stop mechanism includes a stop member fixed to the outer shaft.

3. The system of claim 2, wherein the stop member defines a distal guidewire port.

4. The system of claim 2, wherein the stop member comprises a collet.

5. The system of claim 2, wherein the stop member comprises a set of jaws.

6. The system of claim 1, wherein the stop mechanism includes a stop fixed to the guidewire.

7. The system of claim 1, wherein the stop mechanism is adapted to mechanically engage the guidewire.

8. The system of claim 1, wherein the stop mechanism is adapted to frictionally engage the guidewire.

9. The system of claim 1, wherein the stop mechanism is adapted to apply a compressive force to the guidewire.

20. The system of claim 1, wherein the gripper is configured such that relative axial movement between the inner shaft and the outer shaft urges the gripper to assume the deflected shape.

21. The system of claim 1, wherein the gripper is configured such that relative axial movement between the inner shaft and the outer shaft causes the gripper to grasp the guidewire.

22. The system of claim 1, wherein the gripper comprises a set of jaws.

23. The system of claim 1, wherein the gripper comprises a collet.

25. The system of claim 1, wherein the gripper is configured such that relative axial movement between the inner shaft and the outer shaft urges the gripper to assume the deflected shape.

26. The system of claim 1, wherein the gripper is configured such that relative axial movement between the inner shaft and the outer shaft causes the gripper to grasp the guidewire.

27. The system of claim 1, wherein the gripper comprises a set of jaws.

28. The system of claim 1, wherein the gripper comprises a collet.

10. A system for manipulating a filter fixed to a guidewire disposed within a blood vessel, comprising:

an outer shaft having a proximal end, distal end and a wall defining a shaft lumen;

a stop mechanism comprising a stop member fixed to the outer shaft and a stop fixed to the guidewire;

the stop member defining an aperture having a inner radial extent; and

the stop having an outer radial extent that is generally greater than the inner radial extent of the aperture defined by the stop member.

11. The system of claim 10, wherein the stop member comprises a ring.

12. The system of claim 10, wherein the stop member comprises a collet.

13. The system of claim 10, wherein the stop member comprises a set of jaws.

14. The system of claim 10, wherein the stop member includes a distal mating surface.

15. The system of claim 10, wherein the stop includes a proximal mating surface.

16. The system of claim 10, wherein the stop is configured such that it seats against the stop member.

17. The system of claim 10, wherein the stop member comprises a distal mating surface;

the stop comprises a proximal mating surface; and

the stop is configured such that the proximal mating surface of the stop sits against the distal mating surface of the stop member.

18. The system of claim 10, further including a proximal guidewire port extending through the wall of the outer shaft.

19. A system for manipulating a filter fixed to a guidewire disposed within a blood vessel, comprising:

an outer shaft having a proximal end, distal end and a wall defining a shaft lumen;

an inner shaft slidingly disposed within the shaft lumen;

a gripper fixed to the outer shaft; and

wherein the gripper has a first, undeflected shape, and a second, deflected shape for grasping the guidewire.

24. A system for manipulating a filter fixed to a guidewire disposed within a blood vessel, comprising:

an outer shaft having a proximal end, distal end and a wall defining a shaft lumen;

an inner shaft slidingly disposed within the shaft lumen;

a gripper fixed to the inner shaft; and

wherein the gripper is configured such that relative axial movement between the inner shaft and the outer shaft causes the gripper to grasp the guidewire.