Stent grip and systems for use therewith

• US 8,172,891 B2
• Filed: 12/19/2008
• Issued: 05/08/2012
• Est. Priority Date: 06/30/2003
• Status: Active Grant

• Current Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Original Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Inventors: Shelso, Susan I.
• Primary Examiner(s): TYSON, MELANIE RUANO
• Application Number:
  US12/340,505
• Publication Number:
  US 20090105803A1
• Time in Patent Office: 1,236 Days
• Field of Search: 623/1.11, 623/1.12, 623/1.23, 606/108, 606/153, 606/200
• 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 2002/9665 with additional retaining means

Abstract

A method and apparatus for reducing the longitudinal aspect of the catheter to stent force having at least one grip member for use with a stent delivery system. The grip engages a stent in the unexpanded state prior to delivery of the stent. The stent may be deployed by retracting a stent retaining sheath. The grip has a body region having an outer diameter, a first end and a second end. The outer diameter of the first end is greater than the outer diameter of the second end. The grip is at least partially constructed from a polymeric material.

Claims

1. A stent delivery device, comprising:

an elongate shaft;

a first grip member disposed on the shaft, the first grip member including a first hub, a first proximal portion adjacent and distal to the first hub, and a first distal portion;

wherein the first hub has a first hub outer diameter, wherein the first proximal portion has a first proximal outer diameter less than the first hub outer diameter, and wherein the first distal portion has a first distal outer diameter less than the first proximal outer diameter;

a stent disposed over the first proximal portion and the first distal portion of the first grip member;

wherein the stent is butted against the first hub;

a tubular sheath disposed over the stent; and

a second grip member disposed on the shaft and positioned distally of the first grip member, wherein the second grip member includes a second hub and a second proximal portion, and wherein the second hub has a second hub outer diameter, and wherein the second proximal portion has a second proximal outer diameter less than the second hub outer diameter.

2. The stent delivery device of claim 1, wherein the stent is disposed on at least a portion of the second grip member.

3. The stent delivery device of claim 1, wherein a gap is formed between the first grip member and the second grip member, and wherein at least a portion of the stent is disposed along the gap.

4. The stent delivery device of claim 1, wherein the first grip member includes a polymer.

5. The stent delivery device of claim 1, wherein the first grip member includes a radiopaque material.

6. A stent delivery device, comprising:

an inner member;

a first grip disposed on the inner member, the first grip including a first hub and a first tapered body extending distally from the first hub;

a stent disposed over at least a portion of the first grip;

wherein the stent is butted against the first hub;

a tubular sheath disposed over the stent; and

a second grip disposed on the inner member and positioned distally of the first grip, the second grip including a second hub and a second tapered body extending from the second hub, the second tapered body having an outer diameter that is less than an outer diameter of the second hub; and

wherein the stent is disposed on at least a portion of the second grip.

7. A stent delivery device, comprising:

an inner member;

a first grip disposed on the inner member, the first grip including a first hub and a first tapered body extending distally from the first hub;

a stent disposed over at least a portion of the first grip;

wherein the stent is butted against the first hub;

a tubular sheath disposed over the stent; and

a second grip disposed on the inner member and positioned distally of the first grip, the second grip including a second hub and a second tapered body extending from the second hub, the second tapered body having an outer diameter that is less than an outer diameter of the second hub; and

wherein a gap is formed between the first grip and the second grip, and wherein at least a portion of the stent is disposed along the gap.