MULTILAYER LIQUID ABSORPTION AND DEFORMATION DEVICES

摘要

A multilayer polymeric medical device in the form of a generally cylindrical shape having an inner layer and an outer layer, the device comprised of a combination of polymeric materials characterized in that
- the combination of polymeric materials being arranged in bilayer form comprised of an inner layer of a first polymeric material and an outer layer of a second polymeric material superimposed on the inner layer and joined thereto, the inner layer forming the inner wall of the device,
- the outer layer having greater liquid swellable/absorbent properties than the inner layer whereby the device is caused to shrink upon exposure to liquid.