METHODS AND APPARATUS FOR STENTING COMPRISING ENHANCED EMBOLIC PROTECTION COUPLED WITH IMPROVED PROTECTIONS AGAINST RESTENOSIS AND THROMBUS FORMATION
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United States of America Patent
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Issued Date -
Jul 25, 2013
app pub date -
Mar 13, 2013
filing date -
Sep 5, 1998
priority date (Note) -
Abandoned
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Abstract
Apparatus and methods for stenting are provided comprising a stent attached to a porous biocompatible material that is permeable to endothelial cell ingrowth, but impermeable to release of emboli of predetermined size. Apparatus and methods are also provided for use at a vessel branching. The present invention further involves porous polymer membranes, suitable for use in medical implants, having controlled pore sizes, pore densities and mechanical properties. Methods of manufacturing such porous membranes are described in which a continuous fiber of polymer is extruded through a reciprocating extrusion head and deposited onto a substrate in a predetermined pattern. When cured, the polymeric material forms a stable, porous membrane suitable for a variety of applications, including reducing emboli release during and after stent delivery, and providing a source for release of bioactive substances to a vessel or organ and surrounding tissue.
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