Anti-aspiration prosthesis

A prosthesis for controlling flow through a bodily lumen, the prosthesis comprising:

• a body having a proximal portion, a distal portion, a distal end and a lumen extending therethrough;
• and
• a valve operably connected to the body, the valve having a proximal portion, a distal end portion and a lumen extending through the valve, the valve lumen connected to the body lumen;
• the valve having a closed configuration in the absence of an antegrade pressure and a retrograde pressure, and an open configuration wherein the distal end portion of the valve extends proximally in response to the retrograde pressure, the retrograde pressure being greater than the antegrade pressure, the distal end portion of the valve is positioned distal to the distal end of the body in the closed configuration;
• the valve comprising a material portion operably connected to the valve on a surface of the valve or embedded in the valve, the material portion comprising:
• a distal end, a body portion and a coil, the body portion of the material portion extends proximally from the distal end of the material portion and the coil is formed in the body portion of the material portion and positioned proximal to the distal end of the material portion in the closed configuration of the valve, the material portion providing increased stiffness to the valve relative to the valve alone, the material portion having a first position in the closed configuration and a second position in the open configuration, a distal portion of the material portion bends inward towards the valve lumen to the second position to facilitate proximal extension of the distal end portion of the valve to move the valve to the open configuration in response to the retrograde pressure, wherein the material portion facilitates self-reversion of the valve to the closed configuration wherein the distal end portion of the valve extends distally, the valve allowing flow through the valve in response to retrograde pressure and antegrade pressure when the prosthesis is implanted.