Double balloon thrombectomy catheter

• US 7,909,801 B2
• Filed: 12/04/2009
• Issued: 03/22/2011
• Est. Priority Date: 10/22/1999
• Status: Expired due to Term

• Current Assignee: Argon Medical Devices
• Original Assignee: REX Medical LP
• Inventors: Hinchliffe, Peter W. J.
• Primary Examiner(s): Mendez; Manuel A
• Application Number:
  US12/631,787
• Publication Number:
  US 20100082052A1
• Time in Patent Office: 473 Days
• Field of Search: 604/96.01, 604/101.01, 606191-194
• US Class Current: 604/247
• CPC Class Codes: A61B 17/22032 having inflatable gripping elements balloon catheters A61M25/10
• CPC Class Codes: A61M 25/1011 Multiple balloon catheters
• CPC Class Codes: B82Y 10/00 Nanotechnology for information processing, storage or transmission, e.g. quantum computing or single electron logic

Abstract

A catheter has a lumen for a thrombectomy device and at least two balloons of different compliancies. In one embodiment, the catheter is adapted to clear dialysis grafts. One balloon is adapted to expand a stenosis at a venous junction of a dialysis graft and another balloon is adapted to pull a stenosis at an arterial junction of a dialysis graft. A single catheter may be used to perform a dialysis thrombectomy procedure.

Claims

1. A method for performing mechanical thrombectomy comprising the steps of:

providing a catheter having a distal portion, a proximal portion, an internal passageway, a first axially elongated conduit and a first balloon, the catheter inserted into a patient'"'"'s body with the first balloon in the deflated condition;

exposing a rotatable wire from the internal passageway of the catheter to expose a non-linear distal tip portion so that the distal tip portion extends distal of the first balloon and distal of a distalmost end of the catheter; and

rotating the wire to perform a mechanical thrombectomy procedure to break up thrombus in an area distal of the first balloon and distal of the distalmost end of the catheter.

2. The method of claim 1, further comprising the step of injecting fluid through the first conduit to inflate the first balloon.

3. The method of claim 2, wherein the step of injecting fluid through the first conduit is performed subsequent to the step of rotating the wire.

4. The method of claim 3, wherein the step of inflating the first balloon expands a stenosis.

5. The method of claim 3, wherein the first balloon is an angioplasty balloon, and the step of inflating the first balloon causes the first balloon to form a shape having conical end portions.

6. The method of claim 2, wherein the catheter includes a second balloon and a second axially elongated conduit, and the method includes the step of injecting fluid through the second conduit to inflate the second balloon from a deflated condition.

7. The method of claim 6, wherein the step of rotating the wire to perform the thrombectomy procedure is performed with the first and second balloons in the deflated condition.

8. The method of claim 6, wherein the method includes sliding the wire relative to the internal passageway to expose the wire from the catheter to perform the thrombectomy procedure.

9. The method of claim 8, wherein the rotatable wire further functions as a guide wire for the body.

10. The method of claim 6, further comprising the step of utilizing the second balloon to pull an arterial plug.

11. The method of claim 6, wherein the first balloon is an angioplasty balloon having a first compliancy, and the second balloon has a second compliancy less than the first compliancy, the first balloon being positioned between the second balloon and a proximal portion of the catheter.

12. The method of claim 6, wherein the first and second balloons have different pressure ratings.

13. The method of claim 1, wherein the method includes sliding the wire relative to the internal passageway to expose the wire from the catheter to perform the thrombectomy procedure.

14. The method of claim 1, wherein the step of rotating the wire to perform the mechanical thrombectomy procedure is performed with the first balloon in the deflated condition.

15. The method of claim 1, wherein the catheter includes a radiopaque marker and the method includes visualizing the radiopaque marker to guide the catheter.

16. The method of claim 1, wherein the first balloon includes a radiopaque marker and the method includes the step of radiographically guiding the catheter.

17. The method of claim 1, wherein the rotatable wire further functions as a guide wire for the catheter.