Balloon structure with PTFE component
AssigneeSciMed Life Systems, Inc.
InventorsLixiao Wang, John Jianhua Chen
Life of this patent
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Abstract
A medical balloon having a high burst strength and the ability to return to its preinflation diameter following repeated inflation may be prepared from a first inner layer of material, a second intermediate layer of expanded PTFE and a third outer layer of material.
Claims32
A medical balloon at least a portion of which has at least three layers including
- i) an inner layer made of a first material;
- ii) an intermediate layer formed of a material selected from the group consisting of fluoropolymers and linear high density polyethylene;
- and
- iii) an outer layer made of a second material;
- wherein the intermediate layer is disposed between the inner and outer layers and the first and second materials differ from the material of the intermediate layer.
A method comprising the step of coextruding first, second and third materials so as to form a balloon preform, the second material being PTFE, such that the PTFE forms a layer between the first and third materials.
A medical balloon comprising:
- i) an inner layer formed of an elastomeric material;
- ii) an outer layer formed of an elastomeric material;
- and
- iii) an intermediate layer formed of expanded PTFE disposed between the inner layer and the outer layer.
A medical balloon containing at least an inner layer, an outer layer and an intermediate layer, the intermediate layer encapsulated by the inner and outer layers, the inner layer formed of expanded PTFE.
A medical balloon having at least a portion of which has at least three layers,
- an innermost layer,
- an outer most layer disposed exterior to the innermost layer, and
- an intermediate layer, disposed between the innermost layer and the outermost layer
- wherein the intermediate layer is constructed of a material having a node structure connected by multiple fibers.
Dependencies are inferred from the claim text.