GUIDE EXTENSION CATHETER

• US 20130116701A1
• Filed: 11/07/2012
• Published: 05/09/2013
• Est. Priority Date: 11/09/2011
• Status: Active Grant

• Current Assignee: Boston Scientific Scimed, Inc. (Boston Scientific Corporation)
• Original Assignee: Boston Scientific Scimed, Inc. (Boston Scientific Corporation)
• Inventors: REYNOLDS, BRIAN R., WASDYKE, JOEL M., WANG, HUISUN, FALK, WAYNE
• Granted Patent: US 9,993,613 B2
• Time in Patent Office: Days
• US Class Current: 606/108
• CPC Class Codes: A61M 2025/0004 having two or more concentrically arranged tubes for forming a concentric catheter system
• CPC Class Codes: A61M 25/0069 Tip not integral with tube
• CPC Class Codes: A61M 25/01 Introducing, guiding, advancing, emplacing or holding catheters A61M25/10 takes precedence
• CPC Class Codes: A61M 25/0102 Insertion or introduction using an inner stiffening member, e.g. stylet or push-rod

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 proximal tubular member having a lumen defined therein. A distal tubular member may be attached to the proximal tubular member. The proximal tubular member may have an outer diameter. The distal tubular member may have an inner diameter. The inner diameter of the distal tubular member may be greater than the outer diameter of the proximal tubular member. A stiffening member may be slidably disposed within the proximal tubular member.

Claims

1. A guide extension catheter, comprising:

a proximal tubular member having a lumen defined therein;

a distal tubular member attached to the proximal tubular member;

wherein the proximal tubular member has an outer diameter, wherein the distal tubular member has an inner diameter, and wherein the inner diameter of the distal tubular member is greater than the outer diameter of the proximal tubular member; and

a stiffening member slidably disposed within the proximal tubular member.

2. The guide extension catheter of claim 1, wherein the proximal tubular member includes nickel-titanium alloy.

3. The guide extension catheter of claim 1, wherein the proximal tubular member has an open proximal end and a closed distal end;

4. The guide extension catheter of claim 1, wherein the distal tubular member includes an inner polymer layer, and outer polymer layer, and a reinforcement layer disposed between the inner polymer layer and the outer polymer layer.

5. The guide extension catheter of claim 1, wherein the stiffening member includes stainless steel.

6. The guide extension catheter of claim 1, wherein the distal tubular member has a wall lumen formed in a tube wall of the distal tubular member and wherein the proximal tubular member is disposed in the wall lumen.

7. The guide extension catheter of claim 1, wherein the proximal tubular member is attached to the distal tubular member with a wire member that extends between the proximal tubular member and the distal tubular member.

8. The guide extension catheter of claim 1, wherein the proximal tubular member includes a plurality of tubes that are coupled to one another.

9. The guide extension catheter of claim 1, wherein a proximal end region of the distal tubular member is skived.

10. The guide extension catheter of claim 1, wherein the proximal tubular member has a distal region that extends to a distal end of the distal tubular member.

11. The guide extension catheter of claim 1, wherein the guide extension catheter is disposed within a guide catheter.

12. The guide extension catheter of claim 11, wherein the distal tubular member has an outer diameter that is substantially the same as the inner diameter of the guide catheter.

13. The guide extension catheter of claim 11, wherein a treatment catheter is disposed within the guide catheter.

14. A catheter system for improving access to a coronary artery, the catheter system comprising:

a guide catheter having a distal end;

a guide extension catheter disposed within the guide catheter, the guide extension catheter including;

a proximal tubular member having a lumen defined therein,

a distal tubular member attached to the proximal tubular member, and

a stiffening member slidably disposed within the proximal tubular member;

wherein a distal end of the guide extension catheter is configured to extend distally beyond the distal end of the guide catheter and into a coronary artery; and

a treatment catheter disposed within the guide catheter.

15. The catheter system of claim 14, wherein the distal tubular member has a wall lumen formed in a tube wall of the distal tubular member and wherein the proximal tubular member is disposed in the wall lumen.

16. The catheter system of claim 14, wherein the proximal tubular member is attached to the distal tubular member with a wire member that extends between the proximal tubular member and the distal tubular member.

17. The catheter system of claim 14, wherein the proximal tubular member includes a plurality of tubes that are coupled to one another.

18. The catheter system of claim 14, wherein a proximal end region of the distal tubular member is skived.

19. The catheter system of claim 14, wherein the proximal tubular member has a distal region that extends to a distal end of the distal tubular member.

20. A method for accessing a coronary artery, the method comprising:

providing a guide catheter;

advancing the guide catheter through a blood vessel to a position adjacent to an ostium of a coronary artery;

providing a guide extension catheter, the guide extension catheter comprising;

a proximal tubular member having a lumen defined therein,

a distal tubular member attached to the proximal tubular member,

wherein the proximal tubular member has an outer diameter, wherein the distal tubular member has an inner diameter, and wherein the inner diameter of the distal tubular member is greater than the outer diameter of the proximal tubular member, and

a stiffening member slidably disposed within the proximal tubular member;

advancing the guide extension catheter through the guide catheter to a location where at least a portion of the distal tubular member extends distally beyond a distal end of the guide catheter and into the coronary artery; and

advancing a treatment catheter through the guide catheter.