Patent ID: 8852267

Claim:
A medical device with a tubular wall made of webs, which delimit closed cells, and with a flexible membrane, which forms at least one flap, the flap comprising: a first end connected to at least one first web of a cell, and a free second end arranged opposite the first end in the longitudinal direction of the flap, wherein the flap is configured to move between a closed position, in which the flap extends along the tubular wall and at least partially closes the cell, and an open position, in which the flap is radially deflected relative to the wall in order to free the cell in the manner of a valve; wherein the flap is configured to move between the closed position and the open position in response to a pressure gradient between a space inside the tubular wall and a space outside the tubular wall and wherein in the closed position, the free second end of the flap protrudes into the cell, in particular is arranged inside the cell, or overlaps the cell.