Patent ID: 8202211

Claim:
A controllable gastric band ( 1 ) including a nonextensible back ( 4 ) and a stoma-restricting chamber ( 2 ) disposed on a stoma side of the back ( 4 ) for controlling stoma restriction by supplying and discharging a liquid or other fluid to and from said stoma-restricting chamber ( 2 ), a pressure chamber ( 6 ) disposed on or below an exterior side of the back ( 4 ), which pressure chamber is connected to the stoma-restricting chamber ( 2 ) via a pressure valve ( 5 ) that opens when a threshold pressure in the stoma-restricting chamber is reached to allow liquid or fluid from the stoma-restricting chamber to flow into the pressure chamber, wherein the pressure valve ( 5 ) is adjustable such that the threshold pressure at which the pressure valve opens to allow liquid or fluid from the stoma-restricting chamber to flow into the pressure chamber can be raised or lowered by adjustment of the pressure valve.