SYSTEMS AND METHODS FOR DEPLOYING A PORTION OF A STENT USING AT LEAST ONE COILED MEMBER

• US 20130345789A1
• Filed: 08/27/2013
• Published: 12/26/2013
• Est. Priority Date: 06/13/2012
• Status: Active Grant

• Current Assignee: Cook Medical Technologies, LLC (Cook Group Incorporated)
• Original Assignee: Cook Medical Technologies, LLC (Cook Group Incorporated)
• Inventors: Havel, William J., Vad, Siddhart
• Granted Patent: US 9,144,510 B2
• Time in Patent Office: Days
• US Class Current: 623/1.12
• CPC Class Codes: A61F 2/95 Instruments specially adapted for placement or removal of stents or stent-grafts
• CPC Class Codes: A61F 2/962 having an outer sleeve
• CPC Class Codes: A61F 2002/065 Y-shaped blood vessels
• CPC Class Codes: A61F 2002/067 modular
• CPC Class Codes: A61F 2002/075 the stent being loosely attached to the graft material, e.g. by stitching
• CPC Class Codes: A61F 2002/9511 the retaining means being filaments or wires
• CPC Class Codes: A61F 2002/9665 with additional retaining means
• CPC Class Codes: A61F 2220/0075 sutured, ligatured or stitched, retained or tied with a rope, string, thread, wire or cable
• CPC Class Codes: A61F 2230/0006 circular
• CPC Class Codes: A61F 2230/0091 helically-coiled or spirally-coiled, i.e. having a 2-D spiral cross-section

Abstract

The present embodiments provide systems and methods for deploying at least a portion of a stent. In one embodiment, the system comprises a cannula having an outer surface, and at least one coiled member having proximal and distal ends and a plurality of turns disposed therebetween. One of the proximal and distal ends of the coiled member is secured to the outer surface of the cannula, and the other of the proximal and distal ends of the coiled member is unsecured relative to the outer surface of the cannula. A portion of a stent is looped around the unsecured end of the coiled member. Rotation of the cannula causes the portion of the stent to disengage from the coiled member. The end of the coiled member that is secured relative to the cannula is secured using at least two securing members.

Claims

1. A system for deploying at least a portion of a stent, the system comprising:

a cannula having an outer surface;

at least one coiled member having proximal and distal ends and a plurality of turns disposed therebetween; and

a stent disposed on the cannula,

where one of the proximal and distal ends of the coiled member is secured to the outer surface of the cannula, and the other of the proximal and distal ends of the coiled member is unsecured relative to the outer surface of the cannula,

where a portion of the stent is looped around the unsecured end of the coiled member and further is disposed within spacing between adjacent turns of the coiled member,

where the end of the coiled member that is secured relative to the cannula is secured to an outer surface of the cannula using at least two securing members.

2. The system of claim 1, where the distal end of the coiled member is secured to the outer surface of the cannula and the proximal end of the coiled member is unsecured relative to the outer surface of the cannula, such that the portion of the stent is looped around the proximal end of the coiled member and further is disposed within spacing between adjacent proximal turns of the coiled member in the delivery state.

3. The system of claim 2, where first and second first turns of the plurality of turns comprise first and second inner diameters, respectively, wherein the first diameter is greater than the second diameter, and the first turn is disposed proximal to the second turn.

4. The system of claim 1, where the distal end of the coiled member comprises a tail that is substantially parallel to a longitudinal axis of the cannula.

5. The system of claim 1, further comprising a radial sleeve coupled in a secure relationship to the outer surface of the cannula, wherein at least a portion of the distal end of the coiled member securely engages the radial sleeve.

6. The system of claim 5, further comprising:

a slot formed in the radial sleeve; and

a tail at the distal end of the coiled member, wherein the tail is secured within the slot of the radial sleeve.

7. The system of claim 1 further comprising a protective sleeve covering at least a distal end of the coiled member.

8. The system of claim 1, where the end of the coiled member that is secured relative to the cannula is secured using an interference fit, at least one of a solder or weld, and at least one additional securing member.

9. The system of claim 8, wherein the at least one additional securing member comprises a radial sleeve coupled in a fixed relationship to the outer surface of the cannula, wherein at least a portion of the distal end of the coiled member securely engages the radial sleeve.

10. A method for deploying at least a portion of a stent, the method comprising:

providing a cannula having an outer surface, and further providing at least one coiled member having proximal and distal ends and a plurality of turns disposed therebetween;

securing one of the proximal and distal ends of the coiled member to the outer surface of the cannula, where the other of the proximal and distal ends of the coiled member is unsecured relative to the outer surface of the cannula, and where the end of the coiled member that is secured relative to the cannula is secured to an outer surface of the cannula using at least two securing members;

disposing a portion of a stent around the end of the coiled member that is unsecured relative to the outer surface of the cannula, and further disposing the portion of the stent within spacing between adjacent turns of the coiled member in a delivery state;

rotating the cannula to cause the coiled member to rotate and thereby disengage the portion of the stent from the coiled member.

11. The method of claim 10, where the distal end of the coiled member is secured to the outer surface of the cannula and the proximal end of the coiled member is unsecured relative to the outer surface of the cannula, such that the portion of the stent is looped around the proximal end of the coiled member and further is disposed within spacing between adjacent proximal turns of the coiled member in the delivery state.

12. The method of claim 10, further comprising:

coupling a radial sleeve in a secure relationship to the outer surface of the cannula; and

securely engaging at least a portion of the distal end of the coiled member with the radial sleeve.

13. The method of claim 12, further comprising:

providing a slot formed in the radial sleeve; and

providing a tail at the distal end of the coiled member, wherein the tail is secured within the slot of the radial sleeve.

14. The method of claim 10 further comprising providing a protective sleeve covering at least a distal end of the coiled member.

15. The method of claim 10, where the end of the coiled member that is secured relative to the cannula is secured using an interference fit, at least one of a solder or weld, and at least one additional securing member.

16. The method of claim 15, wherein the at least one additional securing member comprises a radial sleeve coupled in a secure relationship to the outer surface of the cannula, wherein at least a portion of the distal end of the coiled member securely engages the radial sleeve.

17. A system for deploying at least a portion of a stent, the system comprising:

a cannula having an outer surface;

at least one coiled member having proximal and distal ends and a plurality of turns disposed therebetween;

a stent disposed on the cannula; and

a radial sleeve coupled in a secure relationship to the outer surface of the cannula,

where the distal end of the coiled member is secured to the outer surface of the cannula and the proximal end of the coiled member is unsecured relative to the outer surface of the cannula, wherein at least a portion of the distal end of the coiled member securely engages the radial sleeve, and

where a portion of the stent is looped around the unsecured end of the coiled member and further is disposed within spacing between adjacent turns of the coiled member.

18. The system of claim 17, further comprising:

a slot formed in the radial sleeve; and

a tail at the distal end of the coiled member, wherein the tail is secured within the slot of the radial sleeve.

19. The system of claim 17 further comprising a protective sleeve covering at least a distal end of the coiled member.

20. The system of claim 17, where the distal end of the coiled member that is secured relative to the cannula is additionally secured using at least one of an interference fit or a solder or weld.