Prosthesis having a sleeve valve
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United States of America Patent
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-
Jun 8, 2004
Grant Date -
Mar 14, 2002
app pub date -
Jun 7, 2001
filing date -
Aug 31, 1998
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
Disclosed is a pressure sensitive prosthesis (10) that includes a tubular member (11) having a passageway (12) extending therethrough and a sleeve (13) attached about one end of the tubular member. The sleeve functions as a one-way valve to permit fluid flowing through the sleeve lumen (15) in a first direction (17) and under a first pressure, while collapsing in response to fluid flowing in a second direction 18 where the pressure that exceeds that of the first direction or pressure. One aspect of the invention includes an esophageal anti-reflux expandable prosthesis wherein the sleeve is adapted to invert back through the tubular stent frame to permit belching or vomiting (fluid or materials under a third, significantly higher pressure). Another aspect of the invention includes a tubular drainage stent (60), such as a biliary or urethral stent in which the sleeve opens to permit passage of fluids, then collapses to prevent retrograde flow.
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