STENT DELIVERY SYSTEM WITH COLLAPSIBLE LOADING FRAME

• US 20170290692A1
• Filed: 04/10/2017
• Published: 10/12/2017
• Est. Priority Date: 04/11/2016
• Status: Active Grant

• Current Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Original Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Inventors: Toner, Geraldine A., Folan, Martyn G., Connaughton, Enda, Nolan, Damien V., Montague, Matthew
• Granted Patent: US 10,660,776 B2
• Time in Patent Office: Days
• CPC Class Codes: A61F 2/97 the outer sleeve being splittable
• CPC Class Codes: A61F 2002/9528 for retrieval of stents
• CPC Class Codes: A61F 2002/9534 for repositioning of stents
• CPC Class Codes: A61F 2002/9665 with additional retaining means

Abstract

A stent delivery device including an elongate shaft having a proximal region, a distal region and at least one lumen extending therein. The stent delivery device also includes a collapsible frame attached to the distal region of the elongate shaft. The collapsible frame includes a plurality of arms configured to surround a stent such that the plurality of arms define a stent containment region. The stent delivery device also includes an inner member extending within a least a portion of the stent containment region and an actuation member configured to actuate the plurality of arms of the collapsible frame from an expanded configuration to a collapsed configuration.

Claims

1. A stent delivery device, comprising:

an elongate shaft including a proximal region, a distal region and at least one lumen extending therein;

an collapsible frame attached to the distal region of the elongate shaft, the collapsible frame including a plurality of arms configured to surround a stent such that the plurality of arms define a stent containment region;

an inner member extending within a least a portion of the stent containment region; and

an actuation member configured to actuate the plurality of arms of the collapsible frame from an expanded configuration to a collapsed configuration.

2. The stent delivery device of claim 1, wherein the actuation member includes a pull wire.

3. The stent delivery device of claim 2, wherein the pull wire extends around the plurality of arms in a substantially continuous configuration.

4. The stent delivery device of claim 2, wherein the collapsible frame further includes at least one aperture defined between one or more of the plurality of arms, wherein the aperture has a width, and wherein the aperture width decreases as the pull wire is actuated.

5. The stent delivery device of claim 2, wherein each of the plurality of arms includes an opening, and wherein at least a portion of the pull wire extends through the opening of each of the plurality of arms.

6. The stent delivery device of claim 1, wherein the actuation member includes a tubular member configured to slide over the plurality of arms of the collapsible frame, and wherein the tubular member can shift along a longitudinal axis of the collapsible frame to actuate the plurality of arms of the collapsible frame from the expanded configuration to the collapsed configuration.

7. The stent delivery device of claim 1, wherein each of the plurality of arms includes a distal portion and a proximal portion, wherein the proximal portion includes a flexible region positioned distal to a distal end of the elongate shaft.

8. The stent delivery device of claim 7, wherein the flexible region includes a flexible joint configured to maintain a substantially constant distance between the distal portion of the plurality of arms and the elongate shaft.

9. The stent delivery device of claim 1, further comprising a stent disposed within the stent containment region.

10. The stent delivery device of claim 9, wherein the stent is positioned between an inner surface of each of the plurality of arms and an outer surface of the inner member.

11. The stent delivery device of claim 10, wherein the inner surface of each of the plurality of arms defines a concave surface with respect to the outer surface of the inner member, and wherein the concave surface is configured to mate with an outer surface of the stent.

12. A stent delivery system, comprising:

an elongate shaft including a proximal region, a distal region and at least one lumen extending therein;

an collapsible frame attached to the distal region of the elongate shaft, the collapsible frame including at plurality of arms, the plurality of arms collectively defining a stent containment region; and

an actuation member disposed along at least one of the plurality of arms;

wherein the plurality of arms are configured to surround a stent;

wherein the stent containment region has a first diameter corresponding to an expanded configuration and a second diameter corresponding to a collapsed configuration, and wherein actuation of the actuation member is designed to shift the stent containment region from the first diameter to the second diameter.

13. The stent delivery system of claim 12, further comprising an inner member, wherein the inner member extends through the stent containment region.

14. The stent delivery device of claim 12, wherein the actuation member includes a pull wire.

15. The stent delivery device of claim 14, wherein the pull wire extends around the plurality of arms in a substantially continuous configuration.

16. The stent delivery device of claim 14, wherein each of the plurality of arms includes an opening, and wherein at least a portion of the pull wire extends through the opening of each of the plurality of arms

17. The stent delivery device of claim 12, wherein the actuation member includes a tubular member configured to slide over the collapsible frame, and wherein the tubular member can shift along a longitudinal axis of the collapsible frame to shift the plurality of arms from the first diameter to the second diameter.

18. The stent delivery device of claim 12, further comprising a stent disposed within the stent containment region.

19. A method for loading a stent in a stent delivery device, the method comprising:

loading a stent into a stent containment region of a stent delivery device, the stent delivery device including;

an elongate shaft including a proximal region, a distal region and at least one lumen extending therein;

a collapsible frame attached to the distal region of the elongate shaft, the collapsible frame including a plurality of arms configured to surround the stent such that they define the stent containment region;

an inner shaft member extending within a least a portion of the stent containment region; and

an actuation member configured to actuate the plurality of arms of the collapsible frame from an expanded configuration to a collapsed configuration;

actuating the actuation member such that the plurality of arms collapse the stent from an expanded configuration to a collapsed configuration.

20. The method of claim 19, wherein deploying the stent out of the stent containment region further comprises advancing the inner member relative to the collapsible frame to expel the stent out of the stent containment region.