Apparatus for modifying the exit of a satiation pouch

摘要

A satiation pouch (30), positionable within the gastro-esophageal junction so that its proximal opening is aligned with the esophagus, has a flow-restrictive element in the form of distal portion with a smaller distal opening (32). A ductile ring (34) in the distal portion determines the size of the distal opening (32) and can be expanded with a balloon dilator (36) or contracted by an umbrella-like reduction tool (38) passed through the pouch and opened beyond the opening (32) before being drawn up and contracted to reduce the diameter of the ring (34).