Patent ID: 8556968

Claim:
A surgically-implantable prosthetic device comprising: an outer shell having an exterior surface, an interior surface, and enclosing a lumen, wherein the lumen enclosed by the outer shell is able to accommodate a first fluid therein; an inner shell having an exterior surface, an interior surface, and enclosing a lumen, wherein the lumen enclosed by the inner shell is able to accommodate a second fluid therein; non-enclosing fitted shells situated between the exterior surface of the inner shell and the interior surface of the outer shell such that all surfaces of the non-enclosing fitted shells are in communication with the first fluid, said non-enclosing fitted shells defining at least two interacting shell surface pairs; and at least one shell surface in the at least one interacting shell surface pair being textured to reduce the coefficient of static friction value to less than about 2 between the interacting shell surfaces.