Weeping balloon catheter

• US 9,174,030 B2
• Filed: 10/23/2013
• Issued: 11/03/2015
• Est. Priority Date: 04/08/2008
• Status: Active Grant

• Current Assignee: Cook Medical Incorporated (Cook Group Incorporated)
• Original Assignee: Cook Medical Incorporated (Cook Group Incorporated)
• Inventors: Boatman, Scott E.
• Primary Examiner(s): Bosques, Edelmira
• Application Number:
  US14/060,703
• Publication Number:
  US 20140046252A1
• Time in Patent Office: 741 Days
• Field of Search: 604/96.01
• US Class Current: 1/1
• CPC Class Codes: A61M 2025/1013 with concentrically mounted balloons, e.g. being independently inflatable
• CPC Class Codes: A61M 2025/105 having a balloon suitable for drug delivery, e.g. by using holes for delivery, drug coating or membranes
• CPC Class Codes: A61M 2206/20 having means for promoting or enhancing the flow, actively or passively
• CPC Class Codes: A61M 25/1011 Multiple balloon catheters
• CPC Class Codes: A61M 25/104 used for angioplasty

Abstract

Balloon catheters, and methods of treatment therewith, are provided including an inflatable first balloon at least partially enclosed by an expandable second balloon that has holes. The annular space between the first balloon and the second balloon is configured to promote delivery of the fluid evenly through holes in the second balloon to avoid problems of underloading and/or overloading. Preferably, the annular space is in communication with the holes, and the annular space is configured to receive and then to release and distribute the fluid via the holes in a substantially uniform manner such that even amounts of fluid are released in the distal and proximal holes. The first balloon may have various configurations including being tapered relative to the second balloon. The second balloon may also be tapered accordingly. The device may also include raised portions disposed in the annular space and configured to define channels having various configurations.

Claims

1. A balloon catheter comprising:

a catheter shaft extending along a longitudinal axis;

a first balloon mounted on the catheter shaft, the first balloon having a middle working region;

a second balloon mounted around at least a portion of the first balloon, the second balloon having a middle working length, and a plurality of holes formed in the middle working length to define a perforated portion; and

a plurality of raised portions coupled to an outer surface of the first balloon, each of the first and second balloons movable to an expanded configuration to define a plurality of channels disposed between adjacent raised portions and the first and second balloons, the channels being in communication with the plurality of holes of the second balloon;

wherein the channels comprise an annular working region disposed between the perforated portion of the middle working length of the second balloon and a corresponding portion of the middle working region of the first balloon, and

wherein each of the raised portions are interconnected by a web along the outer surface of the first balloon, the web having an increasingly larger cross-sectional area along the longitudinal axis in a distal direction.

2. The balloon catheter of claim 1, wherein each of the raised portions has a lateral cross-sectional area that increases along the longitudinal axis in a distal direction.

3. The balloon catheter of claim 1, wherein each of the channels has a cross-sectional area that decreases along the longitudinal axis in a distal direction.

4. The balloon catheter of claim 1, wherein at least a portion of each raised portion is sealably contactable against the inner surface and the outer surface when the first and second balloons are in the expanded configurations.

5. The balloon catheter of claim 1, wherein the perforated portion of the second balloon has a substantially uniform cross-sectional area along the longitudinal axis in a distal direction.

6. The balloon catheter of claim 1, wherein the portion of the middle working region of the first balloon corresponding to the perforated portion of the second balloon has a substantially uniform cross-sectional area along the longitudinal axis in a distal direction.

7. The balloon catheter of claim 1, wherein the annular working region has an increasingly smaller cross-sectional area along the longitudinal axis in a distal direction.

8. A balloon catheter comprising:

a catheter shaft extending along a longitudinal axis;

a first balloon mounted on the distal end of the catheter shaft, the first balloon having a middle working region;

a second balloon mounted around at least a portion of the first balloon, the second balloon having a middle working length, and a plurality of holes formed in the middle working length to define a perforated portion; and

a plurality of raised portions coupled between at least one of an outer surface of the first balloon and an inner surface of the second balloon, each of the first and second balloons movable to an expanded configuration to define a plurality of channels defined by walls of adjacent raised portions and the first and second balloons and extending along the longitudinal axis, the channels being in communication with the plurality of holes of the second balloon;

wherein the channels comprise an annular working region disposed between the perforated portion of the middle working length of the second balloon and a corresponding portion of the middle working region of the first balloon, and wherein each of the raised portions are interconnected by a web along the outer surface of the first balloon, the web having an increasingly larger cross-sectional area along the longitudinal axis in a distal direction.

9. The balloon catheter of claim 8, wherein each of the raised portions has a lateral cross-sectional area that increases along the longitudinal axis in a distal direction.

10. The balloon catheter of claim 8, wherein each of the channels has a cross-sectional area that decreases along the longitudinal axis in a distal direction.

11. The balloon catheter of claim 8, wherein at least a portion of each raised portion is sealably contactable against the inner surface and the outer surface when the first and second balloons are in the expanded configurations.

12. The balloon catheter of claim 8, wherein the perforated portion of the second balloon has a substantially uniform cross-sectional area along the longitudinal axis in a distal direction.

13. The balloon catheter of claim 8, wherein the portion of the middle working region of the first balloon corresponding to the perforated portion of the second balloon has a substantially uniform cross-sectional area along the longitudinal axis in a distal direction.

14. The balloon catheter of claim 8, wherein the annular working region has an increasingly smaller cross-sectional area along the longitudinal axis in a distal direction.