Polyurethane elastomer article with “shape memory” and medical devices therefrom
AssigneeCardiac Pacemakers, Inc.
InventorMohan Krishnan
Life of this patent
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Abstract
A polyurethane article with shape memory, comprising a mixture of thermoplastic polyurethane and reactive monomer cross-linker which is formed into a shaped article, irradiated, expanded and applied to a medical device, specifically a biomedical electrical lead.
Claims24
An apparatus comprising a shape memory, heat shrinkable polyurethane article comprised of thermoplastic urethane polymer and monomer cross-linker, wherein the article is expanded to receive a medical device and shrunk by the application of heat to conform to the medical device, wherein the medical device is a stent.
A medical device encased in a heat shrinkable, shape memory thermoplastic polyurethane article by a process comprising:
- irradiating the article;
- expanding the article;
- placing the article around a medical device assembly;
- and
- heating the article to conform to the medical device assembly, wherein the medical device is a stent.
An apparatus comprising:
- a stent, wherein the stent is encased in a shape memory, heat shrinkable polyurethane article comprised of thermoplastic urethane polymer and monomer cross-linker, wherein the article is expanded to receive the stent and shrunk by the application of heat to conform to the stent and prevents tissue ingrowth.
An apparatus comprising:
- a vascular graft, wherein the graft is encased in a shape memory, heat shrinkable polyurethane article comprised of thermoplastic urethane polymer and monomer cross-linker,
- wherein the article is expanded to receive the graft and shrunk by the application of heat to conform to the graft and prevents tissue ingrowth.
An apparatus comprising a shape memory, heat shrinkable polyurethane article comprised of thermoplastic urethane polymer and monomer cross-linker, wherein the article is expanded to receive a medical device and shrunk by the application of heat to conform to the medical device, wherein the medical device is a vascular graft.
A medical device encased in a heat shrinkable, shape memory thermoplastic polyurethane article by a process comprising:
- irradiating the article;
- expanding the article;
- placing the article around a medical device assembly;
- and
- heating the article to conform to the medical device assembly, wherein the medical device is a vascular graft.
Dependencies are inferred from the claim text.