Delivery systems for embolic filter devices

• US 6,537,294 B1
• Filed: 10/17/2000
• Issued: 03/25/2003
• Est. Priority Date: 10/17/2000
• Status: Expired due to Term

• Current Assignee: Advanced Cardiovascular Systems Incorporated
• Original Assignee: Advanced Cardiovascular Systems Incorporated
• Inventors: Huter, Scott J., Boyle, William J., Huter, Benjamin C.
• Primary Examiner(s): Calvert, John J.
• Assistant Examiner(s): Hurley, Shaun R
• Application Number:
  US09/691,463
• Time in Patent Office: 889 Days
• Field of Search: 606/191, 606/192, 606/194, 606/195, 606/198, 606/200
• US Class Current: 606/200
• 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 2002/018 made from tubes or sheets of material, e.g. by etching or laser-cutting
• CPC Class Codes: A61F 2230/0006 circular
• CPC Class Codes: A61F 2230/0067 conical
• CPC Class Codes: A61F 2230/008 paraboloidal
• CPC Class Codes: A61M 25/0668 splittable, tear apart

Abstract

A delivery system for an expandable filter device includes a dual lumen delivery sheath which has a lumen for receiving the expandable filter device and a lumen for receiving a primary guide wire. The primary guide wire is utilized to place the delivery sheath and expandable filter into the desired region of the patient'"'"'s vasculature via an over-the-wire or rapid-exchange arrangement. The delivery sheath can be protracted over the expandable filter device to allow the filter to be deployed within the patient'"'"'s vasculature at the desired location. The delivery system can be embodied in an alternative design in which the primary guide wire extends through a guide wire lumen located in an obturator which forms part of the expandable filter device. Again, the primary guide wire is utilized to maneuver the filter device into the desired area via an over-the-wire arrangement. A slit extending longitudinally along the length of the sheath facilitates the removal of the guide wire and delivery sheath from the patient'"'"'s vasculature.

Claims

1. A system for delivering a filter device within a body vessel, comprising:

a filter device mounted on an elongated member;

a guide wire having a proximal end and a distal end; and

a sheath having a proximal end and a distal end and including a first lumen for receiving the filter device and a second lumen for receiving the guide wire therethrough, the filter device and sheath being moveable along the guide wire for positioning the filter device within the body vessel, the sheath having a weakened region which permits at least a portion of the sheath to rupture as it is being retracted from the filter device for deploying the filter device within the body vessel.

2. The delivery system of claim 1, wherein:

the filter device is self-expanding.

3. The delivery system of claim 1, wherein:

the second lumen for receiving the guide wire is a short tubular segment located near the distal end of the sheath.

4. The delivery system of claim 1, wherein the weakened region is a slit formed in the sheath.

5. The delivery system of claim 1, wherein the weakened region is a line of perforations formed in the sheath.

6. The delivery system of claim 1, wherein the lumen for receiving the guide wire includes a weakened region which permits at least a portion of the sheath to rupture as the guide wire is being retracted.

7. A system for delivering a filter device within a body vessel, comprising:

a filter device mounted on an elongated member;

a guide wire having a proximal end and a distal end; and

a sheath having a proximal end and a distal end and including a first lumen for receiving the filter device and a second lumen for receiving the guide wire therethrough, the filter device and sheath being moveable along the guide wire for positioning the filter device within the body vessel, the sheath being retractable from the filter device for deploying the filter device within the body vessel, wherein the second lumen for receiving the guide wire extends substantially along the length of the sheath.

8. A system for delivering a filter device within a body vessel, comprising:

a filter device mounted on an elongated member;

a guide wire having a proximal end and a distal end; and

a sheath having a proximal end and a distal end and including a first lumen for receiving the filter device and a second lumen for receiving the guide wire therethrough, the filter device and sheath being moveable along the guide wire for positioning the filter device within the body vessel, the sheath being retractable from the filter device for deploying the filter device within the body vessel, wherein the first lumen for receiving the filter device extends into the second lumen for receiving the guide wire near the distal end of the sheath.

9. The delivery system of claim 8, wherein:

the first lumen for receiving the filter device has a diameter which decreases as the first lumen extends toward the distal end of the sheath.

10. The delivery system of claim 8, wherein:

the distal end of the first lumen is tapered at the region where it connects with the second lumen to reduce the overall diameter of the sheath at its distal end.

11. A system for delivering a filter device within a body vessel, comprising:

a filter device mounted on an elongated member;

a guide wire having a proximal end and a distal end; and

a sheath having a proximal end and a distal end and including a first lumen for receiving the filter device and a second lumen for receiving the guide wire therethrough, the filter device and sheath being moveable along the guide wire for positioning the filter device within the body vessel, the sheath being retractable from the filter device for deploying the filter device within the body vessel, wherein the sheath includes perforations located near its distal end which causes at least a portion of the sheath to rupture as the tubular member is retracted from the filter device.

12. The delivery system of claim 11, wherein:

the distal end of the sheath includes a line of perforations which extend longitudinally along the length of the sheath in the distal region of the sheath.

13. A delivery sheath for delivering a filter device within a body vessel, comprising:

a tubular member having a proximal end and a distal end and including a first lumen for receiving a filter device and a second lumen for receiving a guide wire therethrough;

wherein

the filter device and elongated tubular member are moveable along the guide wire for positioning the filter device within the body vessel and the tubular member is retractable from the filter device to deploy the filter device within the body vessel, the tubular member including a weakened region which permits at least a portion of the tubular member to rupture as the sheath is retracted from the filter device.

14. The delivery sheath of claim 13, wherein:

the filter device is self-expanding and is mounted on a second guide wire.

15. The delivery sheath of claim 13, wherein:

the second lumen for receiving the guide wire is a short tubular segment located near the distal end of the tubular member.

16. The delivery sheath of claim 13, wherein:

the first lumen for receiving the filter device is a short tubular segment located near the distal end of the tubular member.

17. The delivery sheath of claim 13, further including a mandrel attached to the tubular member, the mandrel being adapted for delivering the tubular member over a guide wire into the body vessel.

18. A delivery sheath for delivering a filter device within a body vessel, comprising:

an elongated tubular member having a proximal end and a distal end and including a first lumen for receiving a filter device and a second lumen for receiving a guide wire therethrough;

wherein

the filter device and elongated tubular member are moveable along a guide wire for positioning the filter device within the body vessel and the tubular member is retractable from the filter device to deploy the filter device within the body vessel and the second lumen for receiving the guide wire extends substantially along the length of the elongated tubular member.

19. A delivery sheath for delivering a filter device within a body vessel, comprising:

an elongated tubular member having a proximal end and a distal end and including a first lumen for receiving a filter device and a second lumen for receiving a guide wire therethrough;

wherein

the filter device and elongated tubular member are moveable along a guide wire for positioning the filter device within the body vessel and the tubular member is retractable from the filter device to deploy the filter device within the body vessel and the first lumen for receiving the filter device extends into the second lumen for receiving the guide wire near the distal end of the tubular member.

20. The delivery sheath of claim 19, wherein:

the first lumen for receiving the filter device has a diameter which decreases as the first lumen extends towards the distal end of the tubular member.

21. The delivery sheath of claim 20, wherein:

the distal end of the first lumen is tapered at a region where it connects with the second lumen to reduce the overall diameter of the tubular member at its distal end.

22. A delivery sheath for delivering a filter device within a body vessel, comprising:

an elongated tubular member having a proximal end and a distal end and including a first lumen for receiving a filter device and a second lumen for receiving a guide wire therethrough;

wherein

the filter device and elongated tubular member are moveable along a guide wire for positioning the filter device within the body vessel and the tubular member is retractable from the filter device to deploy the filter device within the body vessel and the tubular member includes perforations located near its distal end which cause at least a portion of the tubular member to rupture as a tubular member is retracted from the filter device.

23. A delivery sheath for delivering a filter device within a body vessel, comprising:

an elongated tubular member having a proximal end and a distal end and including a first lumen for receiving a filter device and a second lumen for receiving a guide wire therethrough;

wherein

the filter device and elongated tubular member are moveable along a guide wire for positioning the filter device within the body vessel and the tubular member is retractable from the filter device to deploy the filter device within the body vessel and the first lumen for receiving the filter device is a short tubular segment located near the distal end of the tubular member, the first lumen having a first end and a second end and a primary diameter sufficient to receive the filter device in a collapsed position with a narrower diameter near the first and second ends to resist movement of the filter device from the sheath as it is being delivered within the body vessel.

24. A delivery sheath for delivering a filter device within a body vessel, comprising:

an elongated tubular member having a proximal end and a distal end and including a first lumen for receiving a filter device and a second lumen for receiving a guide wire therethrough;

wherein

the filter device is mounted on a second guide wire and the filter device and elongated tubular member are moveable along a guide wire for positioning the filter device within the body vessel and the tubular member is retractable from the filter device to deploy the filter device within the body, the first lumen for receiving the filter device includes a weakened region extending longitudinally from the proximal end of the tubular member to a region adjacent to the sleeve which houses the filter device for facilitating removal of the second guide wire therethrough.

25. The delivery sheath of claim 24, wherein the weakened region is a slit formed in the tubular member.

26. The delivery sheath of claim 24, wherein the weakened region is a line of perforations formed in the tubular member.

27. A delivery sheath for delivering a filter device within a body vessel, comprising:

an elongated tubular member having a proximal end and a distal end and including a first lumen for receiving a filter device and a second lumen for receiving a guide wire therethrough;

wherein

the filter device and elongated tubular member are moveable along a guide wire for positioning the filter device within the body vessel and the tubular member is retractable from the filter device to deploy the filter device within the body vessel and the second lumen for receiving the guide wire includes a weakened region extending longitudinally from the proximal end to the tubular member to a region adjacent to the portion of the sheath which houses the filter device to facilitate removal of the guide wire therethrough.

28. The delivery sheath of claim 27, wherein the weakened region is a slit formed in the tubular member.

29. The delivery sheath of claim 27, wherein the weakened region is a line of perforations formed in the tubular member.

30. A system for delivering a filter device within a body vessel, comprising:

a guide wire having a proximal end and a distal end;

a filter device moveable between a collapsed position and an expanded position which includes an obturator located at the distal end of the filter device, the filter device being attached to the guide wire near its distal end; and

a guide wire lumen extending through the obturator which is adapted to receive a second guide wire used to deliver the filter device into the body vessel utilizing an over-the-wire technique.

31. The delivery system of claim 30, wherein

the obturator has a central distal tip and the guide wire lumen extends through the central distal tip.

32. The delivery system of claim 30, wherein:

the obturator has a central distal tip and the guide wire lumen extends through the obturator offset from the central distal tip.