Biodegradable stent
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United States of America Patent
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Jul 23, 2002
Grant Date -
Feb 14, 2002
app pub date -
Aug 20, 2001
filing date -
Dec 22, 1999
priority date (Note) -
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Abstract
A biodegradable stent for implantation into a lumen in a human body. The stent in one embodiment is made from a biodegradable fiber having an inner core and an outer layer. The outer layer is a blend of two polymer components. The inner core has a first degradation rate, and the outer layer has a second degradation rate. The second degradation rate is slower than the first degradation rate. The fiber softens in vivo such that the stent is readily passed from the lumen as a softened fragment or filament after a predetermined period of time through normal flow of body fluids passing through the lumen.
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