Stent
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United States of America Patent
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N/A
Issued Date -
Sep 25, 2003
app pub date -
Mar 6, 2003
filing date -
Jul 6, 2001
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A stent capable of stably loading a biologically/physiologically active substance, without causing its decomposition or deterioration, and permitting it to release itself slowly over a long period of time without being rapidly released in a short period, after being implanted in a lesion. The stent (1) comprises a cylindrical stent main body (2) having an opening on each end and extending in axial direction between the two openings, and a sustained release coating formed on the surface of said stent main body from which a biologically/physiologically active substance is released, and wherein said sustained release coating is composed of a layer of a biologically/physiologically active substance (3) which covers the surface of said stent main body, and a polymer layer (4) which covers said layer of a biologically/physiologically active substance (3) on said layer of a biologically/physiologically active substance (3), and said layer of a biologically/physiologically active substance (3) contains at least one kind of fat-soluble biologically/physiologically active substance, and said polymer layer (4) contains a polymer miscible with said biologically/physiologically active substance and fine particles (5) equal to or smaller than 5 .mu.m in particle diameter dispersed in the polymer.
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