SYSTEM FOR DELIVERING A STENT

• US 20080300667A1
• Filed: 06/02/2008
• Published: 12/04/2008
• Est. Priority Date: 05/31/2007
• Status: Abandoned Application

• Current Assignee: Bay Street Medical, Inc.
• Original Assignee: Bay Street Medical, Inc.
• Inventors: Hebert, Stephen, Levine, Marc-Alan
• Application Number:
  US12/131,792
• Publication Number:
  US 20080300667A1
• Time in Patent Office: Days
• US Class Current: 623/1.11
• CPC Class Codes: A61F 2/95 Instruments specially adapted for placement or removal of stents or stent-grafts
• 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 2002/9534 for repositioning of stents
• CPC Class Codes: A61F 2002/9665 with additional retaining means

Abstract

A stent delivery system comprising a guide having a retention member configured to exert either an internal force or an external force on the stent to assist in retaining the stent on the guide.

Claims

1. A stent delivery system comprising:

a guide having a first portion and a second portion, the first portion having a first diameter and the second portion having a second diameter less than the first diameter and forming a reduced diameter portion for receiving a stent;

a stent;

a flexible retention arm attached to the guide engaging an external proximal region of the stent to apply a force to the stent against the guide.

2. The stent delivery system as recited in claim 1, wherein the retention arm is a C-cup shape.

3. The stent delivery system as recited in claim 2, wherein the retention arm extends in a distal direction.

4. The stent delivery system of claim 1, wherein the retention arm is formed integral with the guide.

5. The stent delivery system of claim 1, wherein electrical energy is applied to arm to release the stent.

6. A stent delivery system comprising:

an elongate guide having a proximal section and a distal section;

a stent positioned on the distal section of the elongate guide;

a sheath positioned over the stent to retain the stent on the elongate guide; and

a flexible retention arm affixed to the distal end of the elongate guide and configured to engage an internal surface of the stent to apply a force to the stent against an inner surface of the sheath.

7. A stent delivery system as recited in claim 6, wherein the sheath is a delivery catheter.

8. The stent delivery system as recited in claim 6, wherein the retention arm is V-shaped.

9. The stent delivery system as recited in claim 6, further comprising a plurality or retention arms engaging internal regions of the stent.

10. The stent delivery system as recited in claim 6, wherein the guide comprises a hypotube having a proximal end, and a distal end, and a guidewire extending beyond a distal end of the hypotube.

11. The stent delivery system as recited in claim 6, further comprising proximal and distal coil regions that form a reduced diameter portion on the distal section of the elongate guide, the stent residing in the reduced diameter portion.

12. The stent delivery system as recited in claim 6, wherein electrical energy causes a phase change in the retention arm.

13. The stent delivery system as recited in claim 6, wherein the arm comprises an electrolytic joint and application of electrical energy dissolves the joint to release the stent.

14. The stent delivery system as recited in claim 6, wherein the arm comprises a shape memory material that is shape set to flare in an outward direction away from the elongate guide.

15. The stent delivery system as recited in claim 14, wherein the system comprises a plurality of flexible retention arms.

16. The stent delivery system as recited in claim 6, wherein the system comprises a plurality of flexible retention arms.