Systems and methods for securing and releasing a portion of a stent

• US 10,695,205 B2
• Filed: 05/22/2017
• Issued: 06/30/2020
• Est. Priority Date: 12/21/2012
• Status: Active Grant

• Current Assignee: Cook Medical Incorporated (Cook Group Incorporated)
• Original Assignee: Cook Medical Incorporated (Cook Group Incorporated)
• Inventors: Vad, Siddharth
• Primary Examiner(s): Szpira, Julie A
• Application Number:
  US15/601,470
• Publication Number:
  US 20170252193A1
• Time in Patent Office: 1,135 Days
• CPC Class Codes: A61F 2/966 with relative longitudinal movement between outer sleeve and prosthesis, e.g. using a push rod
• CPC Class Codes: A61F 2002/075 the stent being loosely attached to the graft material, e.g. by stitching
• CPC Class Codes: A61F 2002/9505 having retaining means other than an outer sleeve, e.g. male-female connector between stent and instrument
• CPC Class Codes: A61F 2220/0033 made by longitudinally pushing a protrusion into a complementary-shaped recess, e.g. held by friction fit
• CPC Class Codes: A61F 2230/0013 Horseshoe-shaped, e.g. crescent-shaped, C-shaped, U-shaped
• CPC Class Codes: A61F 2230/0052 T-shaped
• CPC Class Codes: A61F 2230/0058 X-shaped

Abstract

The present embodiments provide systems and methods for deploying at least a portion of a stent, comprising a retaining member having a main body. At least one slot is formed into the main body. The at least one slot comprises a circumferentially enclosed segment and an axial opening. A portion of a stent is restrained from moving radially outward when disposed within the circumferentially enclosed segment, and the portion of the stent is self-expandable radially outward when aligned with the axial opening.

Claims

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

providing a retaining member comprising a main body having first and second ends, and at least one slot formed into the main body, the at least one slot comprising a circumferentially enclosed segment and an axial opening;

positioning a portion of a stent within the axial opening of the retaining member, and subsequently within the circumferentially enclosed segment, thereby radially restraining the portion of the stent in a compressed state; and

rotating the retaining member relative to the stent, thereby aligning the portion of the stent with the axial opening and permitting the stent to self-expand radially outward,

wherein, during the step of rotating the retaining member, a wall portion of the retaining member is circumferentially rotated over the portion of the stent being restrained within the retaining member.

2. The method of claim 1 further comprising providing a cannula having an outer surface, where at least a portion of the retaining member is secured to the outer surface of the cannula.

3. The method of claim 1, where the stent comprises at least one coupling portion comprising a longitudinal strut portion having a first width that is less than a second width of the axial opening of the retaining member.

4. The method of claim 3, where the coupling portion extends proximally from a proximal apex of the stent.

5. The method of claim 3, where the coupling portion further comprises at least one of a lateral or rounded projection.

6. The method of claim 5, where a lateral projection is provided, and the longitudinal strut portion and the lateral projection of the coupling portion collectively form a “

t”

shape.

7. The method of claim 5 further comprising positioning the at least one of a lateral or rounded projection proximal to a proximal end of the main body of the retaining member when the stent is restrained.

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

providing a retaining member comprising a main body having first and second ends, and at least one slot formed into the main body, the at least one slot comprising a circumferentially enclosed segment and an axial opening;

positioning a portion of a stent within the axial opening of the retaining member, and subsequently within the circumferentially enclosed segment, thereby radially restraining the portion of the stent in a compressed state; and

rotating the retaining member relative to the stent, thereby aligning the portion of the stent with the axial opening and permitting the stent to self-expand radially outward,

wherein rotation of the retaining member relative to the stent occurs without a corresponding circumferential twisting motion of the stent.

9. The method of claim 8 further comprising providing a cannula having an outer surface, where at least a portion of the retaining member is secured to the outer surface of the cannula.

10. The method of claim 8, where the stent comprises at least one coupling portion comprising a longitudinal strut portion having a first width that is less than a second width of the axial opening of the retaining member.

11. The method of claim 10, where the coupling portion extends proximally from a proximal apex of the stent.

12. The method of claim 10, where the coupling portion further comprises at least one of a lateral or rounded projection.

13. The method of claim 12, where a lateral projection is provided, and the longitudinal strut portion and the lateral projection of the coupling portion collectively form a “

t”

shape.

14. The method of claim 12 further comprising positioning the at least one of a lateral or rounded projection proximal to a proximal end of the main body of the retaining member when the stent is restrained.

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

providing a retaining member comprising a main body having first and second ends, and at least one slot formed into the main body, the at least one slot comprising a circumferentially enclosed segment and an axial opening;

positioning a portion of a stent within the axial opening of the retaining member, and subsequently within the circumferentially enclosed segment, thereby radially restraining the portion of the stent in a compressed state; and

rotating the retaining member relative to the stent, thereby aligning the portion of the stent with the axial opening and permitting the stent to self-expand radially outward,

wherein the stent extends axially beyond the first and second ends of the retaining member in the compressed state.

16. The method of claim 15 further comprising providing a cannula having an outer surface, where at least a portion of the retaining member is secured to the outer surface of the cannula.

17. The method of claim 15, where the stent comprises at least one coupling portion comprising a longitudinal strut portion having a first width that is less than a second width of the axial opening of the retaining member.

18. The method of claim 17, where the coupling portion extends proximally from a proximal apex of the stent.

19. The method of claim 17, where the coupling portion further comprises at least one of a lateral or rounded projection.

20. The method of claim 19, where a lateral projection is provided, and the longitudinal strut portion and the lateral projection of the coupling portion collectively form a “

t”

shape.