Patent ID: 7118600

Claim:
A prosthesis for placement in a patient comprising: a tubular stent having a passage extending longitudinally therethrough; and a sleeve extending from an end of the tubular stent and having a lumen extending longitudinally therethrough and communicating with the passage of the tubular drainage stent, the sleeve permitting the passage of a fluid through the lumen in a first direction in response to the fluid applying a first pressure to the sleeve in the first direction, the sleeve being collapsible so as to substantially close the lumen in response to a fluid applying a second pressure to the sleeve in a second direction, wherein the sleeve comprises a proximal portion and a distal portion, and wherein the distal portion comprises a modification with respect to the proximal portion for increasing resistance to being inverted through the tubular stent in response to the second pressure; and wherein the sleeve is normally closed in the absence of the fluid applying the first pressure to the sleeve in the first direction.