Artificial lower gastrointestinal valve

Details Artificial lower gastrointestinal valve Artificial lower gastrointestinal valve

1988-10-03

1989-07-11

Apley, Richard J.

Prosthesis (i.e., artificial body members), parts thereof, or ai

Implantable prosthesis

1374939, 137846, A61F 202

Patent

active

048468363

ABSTRACT:
A bi-directional valve constructed and arranged for insertion into the esophagus in the vicinity of its lower gastroespohageal sphincter for permanent installation comprises an outer cylindrical housing that engages the inner wall of the esophagus and suspends a flexible conically or pyramidally shaped body having an open base facing the proximal (upper) end of the esophagus, a converging wall housing an upper open portion closable by an upper valve and a rounded apex having a lower slot valve facing the distal (lower) end of the esophagus.

REFERENCES:
patent: 3155110 (1964-11-01), Hoffman
patent: 3159176 (1964-12-01), Russell
patent: 4181145 (1980-01-01), Mitchell
patent: 4434810 (1984-03-01), Atkinson
patent: 4436519 (1984-03-01), O'Neill
patent: 4524805 (1985-06-01), Hoffman
patent: 4623348 (1986-11-01), Feit
patent: 4676802 (1987-06-01), Tofield
patent: 4735607 (1988-04-01), Keith

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