Medical balloon

Patent metadata

Field	Value
Publication number	US-10987496-B2
Application number	US-201815962432-A
Country	US
Kind code	B2
Filing date	Apr 25, 2018
Priority date	Apr 25, 2017
Publication date	Apr 27, 2021
Grant date	Apr 27, 2021

Abstract

A composite expandable medical balloon comprising a base balloon, the base balloon comprising a coextrusion, the coextrusion comprising an inner layer formed from an elastomeric polymer and an outer layer formed from a thermoplastic polymer a fiber braid disposed along the base balloon, the fiber braid comprising at least one polymeric fiber disposed over the base balloon, wherein the base balloon is designed to exhibit minimal delamination between the inner layer the outer layer of the base balloon, and methods of making the same.

First claim

What is claimed is:

1. A composite expandable medical balloon, comprising:
a base balloon comprising a coextrusion, the coextrusion comprising an inner layer formed from an elastomeric polymer, the inner layer comprises a polyether-block-amide, and an outer layer formed from a thermoplastic polymer, the outer layer comprises a thermoplastic polyurethane; and
a fiber braid disposed on and in direct contact with the thermoplastic polymer layer of the base balloon, the fiber braid comprising at least one polymeric fiber disposed over the base balloon;
wherein the base balloon is designed to exhibit minimal delamination between the inner layer and the outer layer of the base balloon.

2. The composite expandable medical balloon of claim 1 , wherein the at least one polymeric fiber comprises an aromatic polyester liquid crystal polymer fiber.

3. The composite expandable medical balloon of claim 1 , wherein the at least one polymeric fiber comprises an aromatic polyamide copolymer fiber.

4. The composite expandable medical balloon of claim 1 , wherein the at least one polymeric fiber comprises an ultra high molecular weight polyethylene fiber.

5. The composite expandable medical balloon claim 1 , wherein the composite expandable medical balloon further comprises at least one first layer disposed on the fiber braid, the at least one first layer comprising a thermoplastic polymer.

6. The composite expandable medical balloon of claim 5 , wherein the at least one first layer comprises a thermoplastic polyurethane.

7. The composite expandable medical balloon of claim 5 , further comprising at least one second layer, the at least one second layer comprising a lubricious material, the at least one second layer being an outermost layer.

8. A composite expandable medical balloon, comprising:
a base balloon formed from a coextrusion comprising an inner layer of an elastomeric polymer, and an outer layer of a thermoplastic polyurethane; and
a fiber braid comprising at least one polymeric fiber disposed on and in direct contact with the outer layer of the base balloon;
wherein the base balloon is designed to exhibit minimal delamination between the inner layer the outer layer of the base balloon;
wherein the composite expandable medical balloon exhibits a rated burst strength of between about 30-70 atmospheres.

9. The composite expandable medical balloon of claim 8 , wherein the elastomeric polymer is a polyether-block-amide copolymer.

10. The composite expandable medical balloon of claim 8 , further comprising at least one first layer disposed over the fiber braid, the at least one first layer comprising a thermoplastic polymer.

11. The composite expandable medical balloon of claim 10 , wherein the first layer comprises a thermoplastic polyurethane.

12. The composite expandable medical balloon of claim 8 , wherein the fiber braid comprises an aromatic liquid crystal polymer.

13. A method of forming a composite expandable medical balloon, the method comprising:
coextruding a tubular member, the tubular member comprising an inner layer of an elastomeric polymer, the elastomeric polymer is a polyether-block amide, and an outer layer of a thermoplastic polymer, the thermoplastic polymer is a polyurethane;
radially expanding the tubular member to form a base balloon; and
disposing a fiber braid comprising at least one polymeric fiber along the base balloon to form a composite balloon;
wherein the base balloon is designed to exhibit minimal delamination between the inner layer and the outer layer of the base balloon.

14. The method of claim 13 , further comprising plasma treating the composite balloon after disposing the fiber braid along the base balloon.

15. The method of claim 13 , further comprising disposing a first layer over the fiber braid, the first layer comprising a thermoplastic polymer.

16. The method of claim 13 , wherein the at least one polymeric fiber is an aromatic polyester liquid crystal polymer fiber.

17. The composite expandable medical balloon of claim 1 , the fiber braid comprising radial fibers having a braid angle of 68 degrees to an axial direction of the balloon.

18. The composite expandable medical balloon of claim 1 , wherein the composite expandable medical balloon exhibits a rated burst strength of between about 30-70 atmospheres.

19. The method of claim 13 , wherein the fiber braid comprises radial fibers having a braid angle of 68 degrees to an axial direction of the balloon.

20. The method of claim 13 , wherein the resultant composite expandable medical balloon exhibits a rated burst strength of between about 30-70 atmospheres.

Assignees

• Boston Scient Scimed Inc

Inventors

• Mccleary Kyle Allen
• Horn Daniel James
• Lindquist Jeffrey S

Classifications

• A61L29/06 Primary

  obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds · CPC title

• A61L29/14

  Materials characterised by their function or physical properties {, e.g. lubricating compositions} · CPC title

• A61L29/085

  Macromolecular materials · CPC title

• A61M2025/1075

  having a balloon composed of several layers, e.g. by coating or embedding · CPC title

• A61F2/958

  Inflatable balloons for placing stents or stent-grafts · CPC title