Implantable vascular device

A method comprising:

• providing a stentless valve in a body lumen, the stentless valve having a plurality of membranes, the plurality of membranes implanted in the body lumen and movable between a first position and a second position, wherein the membranes are movable in response to fluid flow through the lumen.

A method of controlling flow in a body lumen, the method comprising:

• moving a membrane of a stentless valve between a first position and a second position in response to the direction of fluid flow through the lumen, wherein said membrane in said first position restricts fluid flow through the lumen in a first direction alone or in combination with one or more additional membranes, and wherein said membrane in said second position permits fluid flow through the lumen in the first direction alone or in combination with one or more additional membranes.

A medical product, comprising:

• a percutaneously implantable valve having a plurality of leaflets free from any separate support frame, the plurality of leaflets implantable in a body lumen and movable between a first position and a second position, wherein the leaflets are movable in response to fluid flow through the lumen.

A method comprising:

• providing a valve implanted in a body lumen, the valve having a plurality of leaflets free from any separate support frame, the plurality of leaflets percutaneously implanted in the body lumen and movable between a first position and a second position, wherein the leaflets are movable in response to fluid flow through the lumen.

A method of controlling flow in a body lumen, the method comprising:

• moving a membrane of a valve between a first position and a second position in response to the direction of fluid flow through the lumen, wherein the valve is percutaneously implanted in the body lumen and is free from any separate support frame, wherein said membrane in said first position restricts fluid flow through the lumen in a first direction alone or in combination with one or more additional leaflets, and wherein said membrane in said second position permits fluid flow through the lumen in the first direction alone or in combination with one or more additional leaflets.

A method for treating a patient comprising:

• providing a percutaneously implanted valve anchored in a body lumen of the patient, the percutaneously implanted valve comprising one or more leaflets and lacking radial expandability sufficient to anchor itself to the wall of the body lumen.

A medical product, comprising:

• a percutaneously implantable valve for introduction into a body lumen of a patient, the valve comprising one or more leaflets and lacking radial expandability sufficient to anchor itself to the wall of the body lumen;
• and
• an expandable device upon which said valve is mounted, said expandable device configured to expand the valve into the wall of the body lumen.