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

• US 20130338788A1
• Filed: 03/12/2013
• Published: 12/19/2013
• 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: Hopkins, Tony C., Vad, Siddharth, DeBruyne, Michael P., Wagner, Zachary, Roeder, Blayne A., Havel, William J., Hadley, Rick, Kratzberg, Jarin
• Granted Patent: US 9,364,355 B2
• Time in Patent Office: Days
• US Class Current: 623/23.7
• CPC Class Codes: A61F 2/92 Stents in the form of a rolled-up sheet expanding after insertion into the vessel , e.g. with a spiral shape in cross-section
• CPC Class Codes: A61F 2/95 Instruments specially adapted for placement or removal of stents or stent-grafts
• CPC Class Codes: A61F 2002/9511 the retaining means being filaments or wires

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 a coiled member having proximal and distal ends and a plurality of turns disposed therebetween. At least a portion of the coiled member is secured to the outer surface of the cannula. A stent is releasably secured to a portion of the coiled member. A protective cage may encircle the coiled member.

Claims

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

a cannula having an outer surface;

a coiled member having proximal and distal ends and a plurality of turns disposed therebetween, where at least a portion of the coiled member is secured to the outer surface of the cannula;

a stent that is releasably secured to a portion of the coiled member; and

a protective cage encircling the coiled member.

2. The system of claim 1 where the protective cage comprises a plurality of struts separated by a plurality of slots, where a portion of the stent that is releasably secured to the coiled member extends through one of the plurality of slots in a delivery state.

3. The system of claim 2 where each of the plurality of struts and each of the plurality of slots are generally parallel to each other in a direction running along a longitudinal axis of the apparatus.

4. The system of claim 2 where at least one of the plurality of slots has proximal and distal regions and a width at the proximal region is greater than a width at the distal regions.

5. The system of claim 1 where the protective cage is circumferentially rotatable relative to the cannula.

6. The system of claim 1 further comprising an atraumatic tip coupled to the cannula, where at least a portion of the atraumatic tip is disposed beneath the protective cage, and where protective cage can rotate circumferentially relative to the atraumatic tip and the cannula.

7. The system of claim 1 further comprising a distal stop member coupled to the cannula and positioned adjacent to a distal end of the protective cage, where the distal stop member allows the protective cage to rotate relative to the cannula, but prevents the protective cage from sliding distally over the cannula.

8. The system of claim 1 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.

9. The system of claim 8 where the protective cage comprises a larger diameter that encircles the unsecured end of the coiled member, and further comprises a smaller diameter that encircles the secured end of the coiled member.

10. The system of claim 8, 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.

11. The system of claim 10, where a proximal series of turns of the coiled member are spaced apart further from one another relative to spacing between a distal series of turns.

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

a cannula having an outer surface;

a coiled member having proximal and distal ends and a plurality of turns disposed therebetween, where at least a portion of the coiled member is secured to the outer surface of the cannula; and

a stent that is releasably secured to a portion of the coiled member,

where one of proximal or distal ends of the stent comprises a plurality of apices that each comprises a coupling member that is releasably secured to the coiled member, where longitudinal positions of the coupling members of adjacent apices are axially staggered relative to each other.

13. The system of claim 12 where each of proximal apices of the stent have a staggered axial length differential relative to one another.

14. The system of claim 12 where the axial length differential between adjacent proximal apices is calculated based on a formula factoring into account at least the pitch of the coiled member.

15. The system of claim 12 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.

16. The system of claim 12 further comprising a protective cage encircling the coiled member, where the protective cage comprises a plurality of struts separated by a plurality of slots, and where a portion of the stent that is releasably coupled to the coiled member extends through one of the plurality of slots.

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

a cannula having an outer surface;

a coiled member having proximal and distal ends and a plurality of turns disposed therebetween, where at least a portion of the coiled member is secured to the outer surface of the cannula;

a stent that is releasably secured to a portion of the coiled member; and

an atraumatic tip coupled to the cannula, where the atraumatic tip comprises at least one notched region, and the coiled member is at least partially seated within the notched region of the atraumatic tip during removal of the system from a patient'"'"'s vasculature.

18. The system of claim 17, where one of proximal or distal ends of the stent comprises a plurality of apices that each comprises a coupling member that is releasably secured to the coiled member, where longitudinal positions of the coupling members of adjacent apices are axially staggered relative to each other.

19. The system of claim 17 further comprising a protective cage encircling the coiled member, where the protective cage comprises a plurality of struts separated by a plurality of slots, and where a portion of the stent that is releasably coupled to the coiled member extends through one of the plurality of slots.

20. The system of claim 19 where the protective cage comprises a plurality of struts separated by a plurality of slots, where a portion of the stent that is releasably secured to the coiled member extends through one of the plurality of slots in a delivery state.