# US 10,765,845 B2 · Medical tube > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,765,845 B2 - Document ID: US10765845B2 - Status: Granted - Kind: B2 - Application number: 15/693,964 - Filed: 2017-09-01 - Published: 2018-03-08 - Granted: 2020-09-08 - Earliest claimed: 2016-09-02 - Assignees: Terumo Kabushiki Kaisha - Applicants: Terumo Kabushiki Kaisha - Inventors: Naoki Aramaki; Yuuki Souma - Web page: https://patentgrep.com/patent/US10765845B2 ## CPC - A61M 1/60: {Containers for suction drainage, adapted to be used with an external suction source (containers not adapted for subjection to vacuum A61M1/69)} - A61M 1/743: {by changing the cross-section of the line, e.g. flow regulating valves (A61M1/7413 takes precedence)} - A61M 1/84: {Drainage tubes; Aspiration tips (for negative pressure wound therapy A61M1/90; for surgical cutting instruments A61B17/32)} - A61M 25/003: {characterized by features relating to least one lumen located at the distal part of the catheter, e.g. filters, plugs or valves (catheter tips A61M25/0067)} - A61M 25/0075: {Valve means} - A61M 27/002: {Implant devices for drainage of body fluids from one part of the body to another (intraocular A61F9/00781; middle ear A61F11/202)} - A61M 39/24: Check- or non-return valves - A61B 17/1114: {of the digestive tract, e.g. bowels or oesophagus} - A61B 2017/1132: {End-to-end connections} - A61M 25/065: {Guide needles} - A61M 2039/242: {designed to open when a predetermined pressure or flow rate has been reached, e.g. check valve actuated by fluid} - A61M 2039/2433: {Valve comprising a resilient or deformable element, e.g. flap valve, deformable disc} - A61M 2210/1042: Alimentary tract (A61M2210/0618 takes precedence) - 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 tube 10 (drain tube 10) includes a main shaft tube 20, a flow path opening/closing mechanism 40, and a branch tube 30. The main shaft tube 20 internally has a main shaft side distal opening 21a and a main shaft lumen 21. The flow path opening/closing mechanism 40 brings the main shaft lumen 21 into a communicating state by applying pressure smaller than predetermined pressure, and brings the main shaft lumen 21 into a blocked state by applying pressure equal to or greater than the predetermined pressure. The branch tube 30 promotes a pancreatic juice pj to flow into a branch lumen 31, based on the applied pressure which is equal to or greater than the predetermined pressure. ## Claims ### Claim 1 A medical tube comprising: an elongated main shaft tube that has a distal end and a proximal end, that has a distal opening on a distal side, and that internally has a lumen which communicates with the distal opening; a lateral introduction portion that is disposed at an intermediate position in an axial direction of the main shaft tube, and that introduces a fluid to the lumen from a boundary portion which connects a plurality of biological organs to each other; and a flow path opening/closing mechanism that is operable to be in a state of opening the lumen and to be in a state of closing the lumen, wherein the flow path opening/closing mechanism closes the lumen, when negative pressure is applied to the lumen on a proximal side further from flow path opening/closing mechanism, and opens the lumen, when positive pressure is applied to the lumen on a distal side further from the flow path opening/closing mechanism or when the negative pressure is released, and wherein the fluid is aspirated into the lumen via the lateral introduction portion by the negative pressure, and flows inside the main shaft tube in a proximal end direction. ### Claim 2 (depends on 1) The medical tube according to claim 1, wherein the lumen is disposed at one location inside the main shaft tube, and wherein the flow path opening/closing mechanism is disposed on the distal side further from the lateral introduction portion. ### Claim 3 (depends on 2) The medical tube according to claim 2, wherein the flow path opening/closing mechanism is more flexible than a wall portion of the main shaft tube, and both end portions are cylindrical portions fixed to the wall portion, and wherein the cylindrical portions close the lumen in such a way that the cylindrical portions are deformed so that inner walls thereof come into contact with each other when the negative pressure is applied. ### Claim 4 (depends on 2) The medical tube according to claim 2, wherein the flow path opening/closing mechanism is a diaphragm which is disposed on an inner surface of the main shaft tube configuring the lumen, and which has a port capable of opening/closing the lumen. ### Claim 5 (depends on 4) The medical tube according to claim 4, wherein a reinforcement body is disposed in the port. ### Claim 6 (depends on 1) The medical tube according to claim 1, wherein the lumen is divided into a first lumen communicating with the distal opening and a second lumen communicating with the lateral introduction portion so as to be independent of each other inside the main shaft tube, and wherein the flow path opening/closing mechanism opens/closes the first lumen. ### Claim 7 (depends on 6) The medical tube according to claim 6, wherein the main shaft tube has a partition wall which partitions the first lumen and the second lumen, wherein the partition wall has a gas permeable wall which allows gas to permeate and inhibits a liquid from permeating between the first lumen and the second lumen, wherein the flow path opening/closing mechanism is a deformable wall portion which is disposed at a position facing the gas permeable wall, and which configures a portion of the main shaft tube, and wherein the deformable wall portion closes the first lumen by coming into contact with the gas permeable wall when the negative pressure is applied. ### Claim 8 (depends on 7) The medical tube according to claim 7, wherein the lateral introduction portion is at least one branch tube which extends from the main shaft tube, which has a branch side distal opening, and which has the branch lumen communicating with the branch side distal opening. ### Claim 9 A medical tube comprising: an elongated main shaft tube that has a distal end and a proximal end, that has a distal opening on a distal side, and that internally has a lumen which communicates with the distal opening; a lateral introduction portion that is disposed at an intermediate position in an axial direction of the main shaft tube, and that introduces a fluid to the lumen from a boundary portion which connects a plurality of biological organs to each other; and a flow path opening/closing mechanism, wherein the flow path opening/closing mechanism closes the lumen, when negative pressure is applied to the lumen on a proximal side further from flow path opening/closing mechanism, and opens the lumen, when the negative pressure is released, and wherein the fluid is aspirated into the lumen via the lateral introduction portion by the negative pressure, and flows inside the main shaft tube in a proximal end direction. ### Claim 10 (depends on 9) The medical tube according to claim 9, wherein the flow path opening/closing mechanism comprises a diaphragm which is disposed on an inner surface of the main shaft tube configuring the lumen. ### Claim 11 (depends on 10) The medical tube according to claim 10, wherein the flow path opening/closing mechanism comprises two or more reinforcement bodies that have an interlock position that interlocks the diaphragm. ### Claim 12 (depends on 11) The medical tube according to claim 11, wherein each of the reinforcement bodies are formed on the diaphragm at a middle position of the reinforcement body. ### Claim 13 (depends on 11) The medical tube according to claim 11, wherein each of the reinforcement bodies are formed are formed in an arc shape. ### Claim 14 (depends on 11) The medical tube according to claim 11, wherein each of the reinforcement bodies are formed are formed in a polygon shape. ### Claim 15 (depends on 11) The medical tube according to claim 11, wherein each of the reinforcement bodies are formed are formed in a circular shape. ### Claim 16 (depends on 11) The medical tube according to claim 11, wherein each of the reinforcement bodies are formed are formed in a semicircular shape. ### Claim 17 (depends on 10) The medical tube according to claim 10, wherein each of the reinforcement bodies are formed by protruding, in a direction orthogonal to a shaft center of the main shaft tube. ### Claim 18 (depends on 10) The medical tube according to claim 10, wherein each of the reinforcement bodies are formed by protruding, in a second direction so as to tilt in the second direction toward a shaft center of the main shaft tube and tilt in a proximal end direction. ### Claim 19 A medical tube comprising: an elongated main shaft tube that has a distal end and a proximal end, that has a distal opening on a distal side, and that internally has a first lumen which communicates with the distal opening; and a flow path opening/closing mechanism, wherein the flow path opening/closing mechanism closes the first lumen, when a first pressure is applied to the first lumen, and opens the first lumen, when the first pressure is released, and wherein the fluid is aspirated into the first lumen via a lateral introduction portion by the first pressure, and flows inside the main shaft tube to an end. ### Claim 20 (depends on 19) The medical tube according to claim 19, wherein elongated main shaft tube comprises a second lumen.