Device and method for compartmental vessel treatment

• US 10,549,077 B2
• Filed: 11/25/2015
• Issued: 02/04/2020
• Est. Priority Date: 03/12/2010
• Status: Active Grant

• Current Assignee: Trireme Medical Incorporated
• Original Assignee: Trireme Medical Incorporated
• Inventors: Konstantino, Eitan, Feld, Tanhum
• Primary Examiner(s): Louis, Richard G
• Application Number:
  US14/952,728
• Publication Number:
  US 20160074634A1
• Time in Patent Office: 1,532 Days
• CPC Class Codes: A61B 17/22 Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for dilators A61M29/00
• CPC Class Codes: A61B 2017/22001 Angioplasty, e.g. PCTA
• CPC Class Codes: A61B 2017/22051 with an inflatable part, e.g. balloon, for positioning, blocking, or immobilisation A61B2017/22048, A61B2017/3486 take precedence
• CPC Class Codes: A61F 2/958 Inflatable balloons for placing stents or stent-grafts
• 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 2025/1084 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 25/104 used for angioplasty

Abstract

An angioplasty balloon having an elastic constraining structure that partially expands with the balloon so that, at maximum balloon inflation, the constraining structure forms a pattern of channels or “pillows” on the balloon.

Claims

1. A balloon catheter comprising:

a catheter shaft;

a balloon on the catheter shaft; and

a constraining structure disposed over the balloon, the constraining structure comprising a plurality of discrete circumferentially spaced-apart axial struts crossing a plurality of discrete, axially spaced-apart radially expandable rings, the plurality of rings comprising a distal ring, a proximal ring, and an intermediate ring therebetween;

wherein the constraining structure is configured to transition between an unexpanded configuration and an expanded configuration;

wherein each axial strut of the constraining structure is fixedly attached to the catheter on a distal side of the balloon and/or a proximal side of the balloon in both the unexpanded configuration and the expanded configuration to prevent detachment of the constraining structure from the catheter shaft; and

wherein inflation of the balloon expands the constraining structure to the expanded configuration with a plurality of isolated balloon regions protruding from openings between the plurality of circumferentially spaced-apart axial struts crossing the plurality of axially spaced-apart radially expandable rings, the plurality of isolated balloon regions configured to contact a wall of the blood vessel with the constraining structure displaced from the wall of the blood vessel.

2. The balloon catheter of claim 1, wherein at least one of a distal end of each axial strut and a proximal end of each axial strut can translate axially over said the catheter shaft as said balloon is inflated.

3. The balloon catheter of claim 1, wherein said axial struts are configured to elongate as said balloon is inflated.

4. The balloon catheter of claim 1, wherein both ends of said constraining structure are fixedly attached to the catheter shaft.

5. The balloon catheter of claim 1, wherein the constraining structure comprises an elastic material.

6. The balloon catheter of claim 1, wherein each of said radially expandable rings comprises a deformable feature configured to permit radial expansion of said radially expandable rings when said balloon is inflated.

7. The balloon catheter of claim 6, wherein the deformable feature comprises a zig-zag.

8. The balloon catheter of claim 6, wherein the deformable feature comprises an S-curve.

9. The balloon catheter of claim 6, wherein the deformable feature comprises a coil.

10. The balloon catheter of claim 1, wherein said balloon is coated with a drug.

11. The balloon catheter of claim 1, wherein the plurality of axial struts overlap the plurality of radially expandable rings.

12. The balloon catheter of claim 1, wherein when inflated, the balloon comprises a tapered proximal portion, a tapered distal portion, and a central portion therebetween, and wherein the plurality of radially expandable rings are disposed over the central portion of the balloon.