Patent ID: 8540621

Claim:
A medical retainer for sealing a fluid, the retainer being retained in a gastrointestinal tract of a patient, the medical retainer comprising: a sealing section for sealing the fluid, the sealing section making contact with a wall of the gastrointestinal tract; a main body having a passageway, one portion of the main body being surrounded by the sealing section; a first one-way valve disposed in the passageway for allowing flow of the fluid only from downstream to upstream in an insertion direction of the retainer; and a first tube for suctioning the fluid accumulated in a downstream portion of the gastrointestinal tract with respect to a detained position of the retainer, wherein the first tube is detachably connected through the first one-way valve to the passageway; the first tube is inserted through an upstream portion of the gastrointestinal tract; the first tube is communicated between the downstream portion of the gastrointestinal tract and an exterior of the patient; the main body has an upstream surface facing an upward portion of the gastrointestinal tract and a downstream surface facing a downward portion of the gastrointestinal tract; and the first one-way valve is formed on the upstream surface of the passageway.