Guide extension catheter

Patent metadata

Field	Value
Publication number	US-9764118-B2
Application number	US-201514667120-A
Country	US
Kind code	B2
Filing date	Mar 24, 2015
Priority date	Jan 31, 2012
Publication date	Sep 19, 2017
Grant date	Sep 19, 2017

Abstract

Medical devices and methods for making and using medical devices are disclosed. An example medical device may include a guide extension catheter. The guide extension catheter may include a push member having a proximal portion with a proximal stiffness, a distal portion with a distal stiffness different from the proximal stiffness, and a transition portion disposed between the proximal portion and the distal portion. The transition portion may provide a smooth transition between the proximal stiffness and the distal stiffness. The push member may have a first outer diameter. A distal tubular member may be attached to the push member. The distal tubular member may have a second outer diameter larger than the first outer diameter.

First claim

What is claimed is:

1. A guide extension catheter, comprising:
a push member having a distal end portion with an arcuate cross-section and a decreasing radius of curvature from a proximal end to a distal end of the push member, the push member at the arcuate cross-section has an inner surface and an outer surface such that the inner surface is parallel to the outer surface;
a distal tubular member attached to a distal end portion of the push member and extending distal of the push member, the distal tubular member comprising:
a reinforced region having a reinforcing member; and
a proximal region lacking the reinforcing member; and

a sleeve disposed over the proximal region of the distal tubular member to attach the distal tubular member to the push member, wherein the distal end portion of the push member extends between the proximal region of the distal tubular member and the sleeve.

2. The guide extension catheter of claim 1 , wherein the sleeve attaches the push member to the distal tubular member through a reflow connection.

3. The guide extension catheter of claim 1 , wherein there is a gradual transition in flexibility between the push member and the distal tubular member.

4. The guide extension catheter of claim 1 , wherein the proximal region of the distal tubular member is attached to the push member.

5. The guide extension catheter of claim 1 , wherein the distal end portion of the push member includes an arcuate cross-section.

6. The guide extension catheter of claim 5 , wherein the push member comprises a polymer material.

7. The guide extension catheter of claim 1 , wherein the push member is attached to the distal tubular member along an outer surface of the distal tubular member.

8. The guide extension catheter of claim 1 , wherein the reinforced region of the distal tubular member includes a coil.

9. The guide extension catheter of claim 1 , wherein the reinforced region of the distal tubular member includes a braid.

10. A guide extension catheter, comprising:
a push member having a distal end portion with an arcuate cross-section and a decreasing radius of curvature from a proximal end to a distal end of the push member, the push member at the arcuate cross-section has an inner surface and an outer surface such that the inner surface is parallel to the outer surface; and
a distal tubular member attached to the distal end portion, wherein there is a gradual transition in flexibility between the push member and the distal tubular member.

11. The guide extension catheter of claim 10 , wherein the distal tubular member includes a reinforcing region having a reinforcing member and a proximal region proximal the reinforcing region and lacking the reinforcing member.

12. The guide extension catheter of claim 11 , wherein the distal end portion of the push member is attached to the proximal region of the distal tubular member.

13. The guide extension catheter of claim 11 , wherein the reinforcing member includes a coil.

14. The guide extension catheter of claim 10 , wherein the push member comprises a polymer material.

15. The guide extension catheter of claim 14 , wherein the push member comprises a metal material.

16. A method for manufacturing a guide extension catheter, the method comprising:
providing a proximal member having a distal end portion with an arcuate cross-section and a decreasing radius of curvature from a proximal end to a distal end of the proximal member, the proximal member at the arcuate cross-section has an inner surface and an outer surface such that the inner surface is parallel to the outer surface;
providing a distal tubular member;
disposing a polymeric tube over a distal end portion of the proximal member and a proximal region of the distal tubular member, wherein the distal end portion of the proximal member extends between the proximal region of the distal tubular member and the polymeric tube;
reflowing the polymeric tube to form a joint that attaches the proximal member and the distal tubular member.

17. The method of claim 16 , wherein the joint forms a gradual transition in flexibility from the proximal member to the distal tubular member.

18. The method of claim 16 , wherein the distal tubular member includes a reinforced region with a reinforcing member and the proximal region is free of the reinforcing member, and wherein the joint attaches the proximal region free of the reinforcing member to the proximal member.

Assignees

• Boston Scient Scimed Inc

Inventors

• Anderson James M
• Wang Huisun
• Sutermeister Derek C
• Koch Steven J
• Gundale Benjamin P
• Miller Paul J

Classifications

• F04C2270/0421

  Controlled or regulated · CPC title

• A61M25/0052

  Localized reinforcement, e.g. where only a specific part of the catheter is reinforced, for rapid exchange guidewire port · CPC title

• A61M25/0662 Primary

  Guide tubes · CPC title

• A61M25/0009

  Making of catheters or other medical or surgical tubes · CPC title

• A61M2025/0681

  Systems with catheter and outer tubing, e.g. sheath, sleeve or guide tube · CPC title