Device for compartmental dilatation of blood vessels

• US 10,220,193 B2
• Filed: 07/23/2015
• Issued: 03/05/2019
• Est. Priority Date: 02/01/2012
• Status: Active Grant

• Current Assignee: Trireme Medical Incorporated
• Original Assignee: Trireme Medical Incorporated
• Inventors: Feld, Tanhum, Konstantino, Eitan
• Primary Examiner(s): Vu, Quynh-Nhu H.
• Application Number:
  US14/807,657
• Publication Number:
  US 20160022968A1
• Time in Patent Office: 1,321 Days
• 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 2025/1081 having sheaths or the like for covering the balloon but not forming a permanent part of the balloon, e.g. retractable, dissolvable or tearable sheaths
• CPC Class Codes: A61M 2025/1084 having features for increasing the shape stability, the reproducibility or for limiting expansion, e.g. containments, wrapped around fibres, yarns or strands
• CPC Class Codes: A61M 25/1002 characterised by balloon shape A61M25/1006, A61M25/1009 take precedence
• CPC Class Codes: A61M 25/10184 Means for controlling or monitoring inflation or deflation
• CPC Class Codes: A61M 25/104 used for angioplasty
• CPC Class Codes: A61M 29/02 Dilators made of swellable material balloon catheters for angioplasty A61M25/104

Abstract

A constraining structure for use with a balloon catheter includes multiple longitudinal struts and multiple expandable radial rings. The constraining structure can expand radially but may not expand substantially in the longitudinal direction. The constraining structure can have multiple compartments configured to expand independently of one another. Inflating the balloon catheter within the constraining structure can allow for dilation of the blood vessel in a pre determined topography.

Claims

1. A system for performing angioplasty comprising:

a catheter shaft;

an inflatable balloon at a distal portion of the catheter shaft;

a radially expandable constraining structure disposed over the balloon, the constraining structure comprising;

a plurality of axially spaced-apart radially expandable rings comprising a distal radially expandable ring, a proximal radially expandable ring, and at least one additional radially expandable ring between said distal radially expandable ring and said proximal radially expandable ring, each of said plurality of rings being a fully enclosed ring; and

a plurality of circumferentially spaced-apart axial struts crossing the plurality of rings, each of the axial struts being joined to said catheter on a distal side and/or a proximal side of the balloon, such that the constraining structure is non-deployably disposed over the balloon;

wherein the constraining structure is capable of maintaining a constant length during inflation and deflation of said balloon when the constraining structure is positioned over said balloon and

further wherein the constraining structure is configured such that, when the balloon is inflated, a maximum expanded diameter of the constraining structure is less than a maximum inflated diameter of the balloon, such that separate inflation zones are created separated by rings and struts with each of the separate inflation zones being positioned radially outward of the constraining structure.

2. The system of claim 1, wherein the constraining structure comprises a polymer.

3. The system of claim 1, wherein the constraining structure comprises a metal.

4. The system of claim 1, wherein the constraining structure comprises a laser cut structure.

5. The system of claim 1, wherein the constraining structure comprises wires.

6. The system of claim 1, wherein the constraining structure comprises a drug coating.

7. The system of claim 6, wherein the drug coating is directly applied to the constraining structure.

8. The system of claim 6, wherein the drug coating is applied to the constraining structure in a form of a matrix or microcapsule.

9. The system of claim 1, wherein the balloon comprises a drug coating.

10. The system of claim 9, wherein the drug coating is directly applied to the balloon.

11. The system of claim 10, wherein the drug coating is applied to the balloon using a matrix or microcapsule.

12. The system of claim 1, wherein a length of the balloon does not increase during inflation.

13. The system of claim 1, wherein proximal and distal ends of the constraining structure are attached to the catheter shaft.

14. The system of claim 1, wherein prior to the balloon being inflated, the constraining structure has an initial diameter, and wherein when the balloon is deflated, the constraining structure returns to the initial diameter.