# US 8,540,621 B2 · Medical retainer and medical operation using the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,540,621 B2 - Document ID: US8540621B2 - Status: Granted - Kind: B2 - Application number: 11/652,954 - Filed: 2007-01-12 - Published: 2007-11-15 - Granted: 2013-09-24 - Earliest claimed: 2006-01-13 - Assignees: Olympus Medical Systems Corp. - Applicants: David E. Barlow; Takayasu Mikkaichi; Kensei Nakahashi; Hironobu Kawano; Kunihide Kaji - Inventors: David E. Barlow; Takayasu Mikkaichi; Kensei Nakahashi; Hironobu Kawano; Kunihide Kaji - Web page: https://patentgrep.com/patent/US8540621B2 ## CPC - A61M 5/14276: {specially adapted for implantation} - A61B 17/12099: {characterised by the location of the occluder} - A61B 17/12136: {Balloons} - A61B 17/12159: {Solid plugs; being solid before insertion} - A61B 17/12181: {formed by fluidized, gelatinous or cellular remodelable materials, e.g. embolic liquids, foams or extracellular matrices} - A61B 17/06066: {Needles, e.g. needle tip configurations} - A61B 2017/00278: {Transorgan operations, e.g. transgastric} - A61M: DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY (introducing media into or onto the bodies of animals A61D7/00; means for inserting tampons A61F13/26; devices for administering food or medicines orally A61J; containers for collecting, storing or administering blood or medical fluids A61J1/05); DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY (surgery A61B; chemical aspects of surgical articles A61L); DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR {(Electrotherapy, e.g. producing anaesthesia by the use of alternating or intermittent currents A61N1/36021)} - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) ## Abstract A medical retainer is provided capable of independently controlling supplying air and water to a hollow organ like a stomach and a lumen of a small intestine. The medical retainer for sealing a fluid, the retainer being subject to be retained in a gastrointestinal tract of a patient, the medical retainer includes: a sealing section for sealing the fluid, the sealing section making contact with a wall of the gastrointestinal tract; a main body having passageways; and directional valves disposed in the passageways for allowing one of upward flow and downward flow of the fluid relative to the position of the retainer. ## Claims ### Claim 1 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. ### Claim 2 (depends on 1) The medical retainer according to claim 1, wherein the gastrointestinal tract is a duodenum. ### Claim 3 (depends on 1) The medical retainer according to claim 1, further comprising a connection structure wherein the first tube connected to the first one-way valve releases the upstream portion of the gastrointestinal tract to the downstream portion of the gastrointestinal tract. ### Claim 4 (depends on 1) The medical retainer according to claim 1, wherein the first tube is introduced to the exterior of the patient so that the downstream portion of the gastrointestinal tract can be released to an ambient pressure. ### Claim 5 (depends on 1) The medical retainer according to claim 1, wherein the sealing section is an expandable balloon, the main body has a connection port on the upstream surface of the main body, the connection port being connected to a second tube for supplying air for inflating the balloon, and the second tube has a second one-way valve. ### Claim 6 (depends on 1) The medical retainer according to claim 1, wherein the main body has an outer circumference, and the sealing section is disposed on the outer circumference. ### Claim 7 (depends on 1) The medical retainer according to claim 1, wherein the sealing section is an expandable member making contact with the wall of the gastrintestinal tract to seal the fluid. ### Claim 8 A natural orifice medical operation using a medical retainer for sealing a fluid, the retainer being retained in a duodenum of a patient, the medical retainer comprising: a sealing section for sealing the fluid, the sealing section making contact with a wall of the duodenum; 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; 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 a 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, the operation comprising: inserting the medical retainer into the duodenum of a patient by using an endoscopic device; retaining the medical retainer in the duodenum; conducting a medical treatment on the patient; and collecting the medical retainer from the inside of the patient to the exterior of the patient. ### Claim 9 (depends on 8) The medical operation according to claim 8, wherein the medical treatment includes adjusting the gas pressure in the downward portion of the gastrointestinal tract of the patient. ### Claim 10 (depends on 8) The medical operation according to claim 8, wherein the medical treatment includes releasing the downstream portion of the gastrointestinal tract of the patient to an ambient. ### Claim 11 (depends on 8) The medical operation according to claim 8, wherein the medical treatment includes releasing the downstream portion of the gastrointestinal tract of the patient to an inner pressure of a stomach. ### Claim 12 (depends on 8) The medical operation according to claim 8, wherein collecting the medical retainer from the inside to outside of the patient includes contracting the medical retainer. ### Claim 13 (depends on 8) The medical operation according to claim 8, wherein the medical treatment includes supplying air into a stomach of the patient. ### Claim 14 (depends on 8) The medical operation according to claim 8, wherein the operation is gastrically conducted in the abdominal cavity. ### Claim 15 (depends on 14) The medical operation according to claim 14, further comprising: retaining in the duodenum; incising an intended site of a wall of a stomach by using an endoscopic device; and conducting a medical treatment in an abdominal cavity.