Patent ID: 8221505

Claim:
A prosthesis for placement in a patient for controlling fluid flow through a passageway, the prosthesis comprising: a tubular stent having a proximal portion, a distal portion, a passage extending longitudinally therethrough, the distal portion comprising a first opening through a sidewall thereof and a second distal end opening, the first opening defining a first flow axis, the passage comprising a closed tubular conduit between a proximal end and the first opening, the passage defining a second flow axis therethrough non-parallel to the first flow axis, the first flow axis and the second flow axis intersecting at an acute angle; and a sleeve extending from the distal portion of the tubular stent, the sleeve having a lumen extending longitudinally therethrough and communicating with the passage of the tubular stent, the sleeve permitting the passage of a fluid from the passage of the tubular stent 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 to prevent flow through the passage of the tubular stent in a retrograde direction; wherein at least a portion of a proximal portion of the sleeve extends distally over an outer surface of the stent and is affixed to the outer surface of the stent at a sleeve connection position in a fluidly secure configuration so that retrograde flow is prevented through the first and second openings and wherein the first opening is distal to the sleeve connection position, the first opening allows flow to continue into the sleeve when the second opening is occluded; and wherein the sleeve is normally closed in the absence of fluid applying the first pressure to the sleeve in the first direction.