MEDICAL DEVICE DELIVERY SYSTEM WITH SHEATH SEPARATION

• US 20080255580A1
• Filed: 03/31/2008
• Published: 10/16/2008
• Est. Priority Date: 03/31/2007
• Status: Active Grant

• Current Assignee: Cook Medical Technologies, LLC (Cook Group Incorporated)
• Original Assignee: Cook Medical Technologies, LLC (Cook Group Incorporated)
• Inventors: Case, Brian C., HOFFMAN, GRANT T.
• Granted Patent: US 8,088,154 B2
• Time in Patent Office: Days
• US Class Current: 606/108
• CPC Class Codes: A61F 2/95 Instruments specially adapted for placement or removal of stents or stent-grafts
• CPC Class Codes: A61F 2/958 Inflatable balloons for placing stents or stent-grafts
• CPC Class Codes: A61F 2/97 the outer sleeve being splittable

Abstract

Medical device delivery systems and associated methods are provided. Delivery systems according to the invention include an elongated tubular member and a body member, such as a dilator, disposed therein. An intraluminal medical device is disposed on the dilator and within the tubular member prior to deployment. The delivery system includes a means for separating two or more portions of the distal end of the tubular member that aids in deploying the intraluminal medical device from the delivery system by separating two or more portions of the tubular member from each other to facilitate release of the intraluminal medical device from the body member. Various structures can be used for means for separating, including a cutting ring, activateable material on the tubular member, or other suitable structure. The provided devices and methods reduce friction occuring from relative movement between the sheath and dilator during deployment.

Claims

1. A medical device delivery system, comprising:

an elongated body adapted for insertion into a body vessel, the elongated body having first proximal and first distal ends;

an intraluminal medical device disposed on the first distal end of the elongated body and adapted for deployment within said body vessel;

a tubular member having second distal and second proximal ends, the second distal end disposed around the intraluminal medical device such that the intraluminal medical device is constricted between the second distal end of the tubular member and the first distal end of the elongated body; and

means for separating the second distal end of the tubular member into two or more portions.

2. The medical device delivery system of claim 1, wherein the second distal end of the tubular member comprises first and second sections having different structural integrities.

3. The medical device delivery system of claim 2, wherein the first section comprises at least one hole in the tubular member.

4. The medical device delivery system of claim 2, wherein the first section comprises a plurality of holes in the tubular member.

5. The medical device delivery system of claim 4, wherein the plurality of holes is substantially arranged in a straight line.

6. The medical device delivery system of claim 1, wherein the second distal end of the tubular member comprises a first set of sections and a second set of sections, and wherein each of the first set of sections has a different structural integrity than each of the second set of sections.

7. The medical device delivery system of claim 6, wherein each of the first set of sections comprises at least one hole in the tubular member.

8. The medical device delivery system of claim 6, wherein each of the first set of sections comprises a plurality of holes in the tubular member.

9. The medical device delivery system of claim 8, wherein the first and second sets of sections are disposed around a circumference of the second distal end of the tubular member in an alternating pattern.

10. The medical device delivery system of claim 1, wherein the means for separating the second distal end of the tubular member into two or more portions comprises an annulus disposed around the second distal end of the tubular member.

11. The medical device delivery system of claim 10, wherein the annulus has an inner surface disposed adjacent the second distal end of the tubular member and includes at least one cutting edge disposed on the inner surface, the cutting edge adapted to separate two portions of the distal end of the tubular member.

12. The medical device delivery system of claim 11, wherein the at least one cutting edge comprises a plurality of cutting edges.

13. The medical device delivery system of claim 12, wherein the plurality of cutting edges is spaced equidistantly about a circumference of the annulus.

14. The medical device delivery system of claim 10 further comprising at least one wire member attached to the annulus and extending along substially the entire length of the tubular member.

15. The medical device delivery system of claim 1, wherein the means for separating the second distal end of the tubular member into two or more portions comprises one or more strips of shape-memory material attached to the second distal end of the tubular member.

16. A medical device delivery system, comprising:

an elongated body adapted for insertion into a body vessel, the elongated body having first proximal and first distal ends;

an intraluminal medical device disposed on the first distal end of the elongated body and adapted for deployment within said body vessel;

a tubular member having a second distal end disposed around the intraluminal medical, the second distal end including alternating sections of lower and greater structural integrity attached to each other at at least one section interface; and

means for separating the second distal end of the tubular member into two or more portions across the at least one section interface.

17. The medical device delivery system of claim 16, wherein each of the sections of lower structural integrity comprises at least one hole in the tubular member.

18. The medical device delivery system of claim 16, wherein each of the sections of lower structural integrity comprises a plurality of holes in the tubular member.

19. A medical device delivery system, comprising:

an elongated body adapted for insertion into a body vessel, the elongated body having first proximal and first distal ends;

an intraluminal medical device disposed on the first distal end of the elongated body and adapted for deployment within said body vessel;

a tubular member having a second distal end disposed around the intraluminal medical, the second distal end comprising at least one plurality of holes in the tubular member substantially arranged in a line; and

means for separating the second distal end of the tubular member into two or more portions across the line.

20. The medical device delivery system of claim 19, wherein the means for separating comprises one or more strips of shape-memory material attached to the second distal end of the tubular member.

21. The medical device delivery system of claim 19, wherein the means for separating comprises one or more cutting edge disposed adjacent the at least one plurality of holes in the tubular member.