Polyurethane elastomer article with “shape memory” and medical devices therefrom
First Claim
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1. 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.
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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.
174 Citations
24 Claims
- 1. 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.
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8. A medical device encased in a heat shrinkable, shape memory thermoplastic polyurethane article by a process comprising:
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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. - View Dependent Claims (9)
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10. 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. - View Dependent Claims (11, 12)
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13. An apparatus comprising:
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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. - View Dependent Claims (14, 15)
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- 16. 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.
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23. A medical device encased in a heat shrinkable, shape memory thermoplastic polyurethane article by a process comprising:
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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. - View Dependent Claims (24)
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Specification