Patent ID: 8444687

Claim:
A method of treating a patient, comprising: percutaneously delivering a medical product to a body lumen, the product including a stentless valve and further a catheter having an expandable member upon which the stentless valve is mounted, the stentless valve having a plurality of membranes free from any separate support frame and having a thickened peripheral edge, the entire stentless valve formed as a single piece, the plurality of membranes implantable in the body lumen in the absence of a stent and thereupon movable between a first position and a second position, wherein the membranes are movable in response to fluid flow through the lumen, wherein the plurality of membranes in said second position and a portion of the body lumen form a cup for trapping the fluid; expanding the expandable member in the body lumen so as to force the valve against a wall of the body lumen; and removing the catheter and the expandable member from the body lumen such that the valve remains anchored in the body lumen in the absence of a stent, wherein the anchored valve includes one or more barbs extending into the wall of the body lumen.