# US 2025/0082191 A1 · Method and arrangement for pre-cleaning an endoscope > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2025/0082191 A1 - Document ID: US20250082191A1 - Status: Published application - Kind: A1 - Application number: 18/883,453 - Filed: 2024-09-12 - Published: 2025-03-13 - Earliest claimed: 2023-09-13 - Assignees: Olympus Winter & Ibe GmbH - Applicants: Olympus Winter & Ibe GmbH - Inventors: Benjamin Ottens - Web page: https://patentgrep.com/patent/US20250082191A1 ## CPC - A61B 1/125: {using fluid circuits} - A61B 90/70: Cleaning devices specially adapted for surgical instruments - A61B 1/00137: {End pieces at either end of the endoscope, e.g. caps, seals or forceps plugs} - A61B 1/122: {using cleaning tools, e.g. brushes} - A61B 2090/701: {for flexible tubular instruments, e.g. endoscopes} - A61L 2/18: Liquid substances - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) - A61L: METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES (preservation of bodies or disinfecting characterised by the agents employed A01N; preserving, e.g. sterilising, food or foodstuffs A23; preparations for medical, dental or toiletry purposes A61K) ## Abstract A method for pre-cleaning an endoscope including: connecting a liquid source, a suction pump, and a sealing element each to first, second and third channel openings. The channel openings are connected to the liquid source, suction pump, or sealing element. The first channel opening is at an end of a first channel section and at a distal end of the endoscope. The second channel opening is at an end of a second channel section and is a connection port. The third channel opening is at an end of a third channel section and is a connection port. The liquid source provides a gas-tight seal, has a holding chamber with a volume for holding liquid, and the holding chamber volume is changeable. The suction pump is activated for drawing liquid from the liquid source, wherein the holding chamber volume reduces during drawing of liquid from the liquid source. ## Claims ### Claim 1 A method for pre-cleaning an endoscope, the method comprising: connecting a liquid source, a suction pump, and a sealing element each to a different one of a first channel opening, a second channel opening, and a third channel opening of respective, first, second and third channels of an endoscope connected to each other at a channel connection, the connecting being such that each of the first, second, and third channel openings are connected to either the liquid source, the suction pump, or the sealing element, wherein the first channel opening is arranged at an end of the first channel section and at a distal end of the endoscope, the second channel opening is arranged at an end of the second channel section and formed as a connection port, and the third channel opening is arranged at an end of the third channel section and formed as a connection port; wherein the liquid source is configured to provide a gas-tight sealing from the environment that surrounds the liquid source, the liquid source has a holding chamber with a holding chamber volume for holding the liquid, wherein the holding chamber volume of the holding chamber is changeable; and activating the suction pump for drawing liquid from the liquid source towards the suction pump, wherein the holding chamber volume of the liquid source reduces during drawing of liquid from the liquid source. ### Claim 2 (depends on 1) The method according to claim 1, wherein the holding chamber volume of the liquid source reduces by a volume of liquid that is drawn out of the liquid source. ### Claim 3 (depends on 1) The method according to claim 1, wherein the sealing element is connected to one or more of the first, second and third channel opening such that the one or more of the first, second and third channel opening is sealed air-tight from the environment that surrounds the one or more of the first, second and third channel opening. ### Claim 4 (depends on 3) The method according to claim 3, wherein the sealing clement is connected to the third channel opening. ### Claim 5 (depends on 1) The method according to claim 1, wherein the first channel section extends from the first channel opening to the channel connection, the second channel section extends from the second channel opening to the channel connection, and the third channel section extends from the third channel opening to the channel connection. ### Claim 6 (depends on 1) The method according to claim 1, wherein the first channel section and the second channel section form a channel that extends from the first channel opening to the second channel opening, and wherein the third channel section forms a branched channel section, which is fluidly connected to the channel at the channel connection. ### Claim 7 (depends on 1) The method according to claim 1, wherein the liquid source is connected to the first channel opening and arranged at the distal end of the endoscope such that the liquid source is fluidly connected to the distal end of the endoscope and the liquid source and the distal end of the endoscope are sealed air-tight from the environment that surrounds the distal end of the endoscope and the liquid source. ### Claim 8 (depends on 1) The method according to claim 1, wherein the suction pump is connected to the second channel opening via an intermediate liquid holding element with a holding volume. ### Claim 9 (depends on 8) The method according to claim 8, wherein the holding element is a hose. ### Claim 10 (depends on 8) The method according to claim 8, wherein the holding volume is formed by a channel of the intermediate liquid holding element. ### Claim 11 (depends on 8) The method according to claim 8, wherein the holding volume of the intermediate liquid holding element is larger than a holding volume of the branched channel section. ### Claim 12 (depends on 4) The method according to claim 4, wherein by activating the suction pump, air is removed from the third channel section in such a way that an underpressure builds up in the third channel section. ### Claim 13 (depends on 12) The method according to claim 12, wherein the third channel section is formed as one of a biopsy branch or as an air channel branch. ### Claim 14 (depends on 1) The method according to claim 1, further comprising venting one of the first, second and third channel section to which the suction pump is connected. ### Claim 15 (depends on 14) The method according to claim 14, wherein the other of the first, second and third channel sections are vented by disconnecting the suction pump from a respective one of the first, second and third channel opening. ### Claim 16 (depends on 15) The method according to claim 15, further comprising, after the venting, filling the third channel section with liquid from the one of the first, second and third channel section to which the suction pump was connected by using an underpressure that was built up due to the underpressure applied in the third channel section by the suction pump before venting. ### Claim 17 (depends on 4) The method according to claim 4, wherein the connecting of the sealing element to the third channel opening comprises arranging a transparent sealing element onto the third channel opening. ### Claim 18 (depends on 17) The method according to claim 17, wherein the transparent sealing element is a closed transparent tube element. ### Claim 19 (depends on 1) The method according to claim 1, wherein the liquid that is arranged in the liquid source is one of water, a disinfectant solution, or a detergent solution. ### Claim 20 (depends on 1) The method according to claim 1, wherein the first, second and third channels comprises one or more of: an air channel that extends from an air channel connection port to the distal end of the endoscope, a suction channel, that extends from a suction channel connection port to the distal end of the endoscope, a water channel that extends from a water channel connection port to the distal end of the endoscope, and an auxiliary water channel that extends from an auxiliary water channel connection port to the distal end of the endoscope. ### Claim 21 (depends on 1) The method according to claim 1, wherein the suction channel is formed by the first and second channel sections, and the suction channel connection port is formed by the second channel opening. ### Claim 22 An arrangement for pre-cleaning an endoscope, the arrangement comprising: a liquid source, in particular a vessel that holds liquid, a suction pump, and a sealing element, wherein the liquid source, the suction pump, and the sealing element are each connected to a different one of a first channel opening, a second channel opening, and a third channel opening of respective, first, second and third channels of an endoscope connected to each other at a channel connection, the connecting being such that each of the first, second and third channel openings are connected to either the liquid source, the suction pump, or the sealing element, the first channel opening is arranged at an end of the first channel section and at a distal end of the endoscope, the second channel opening is arranged at an end of the second channel section and formed as a connection port, and the third channel opening is arranged at an end of the third channel section and formed as a connection port, the liquid source is configured to provide a gas-tight sealing from the environment that surrounds the liquid source, wherein the liquid source has a holding chamber with a holding chamber volume for holding the liquid, and the holding chamber volume of the holding chamber is changeable. ### Claim 23 (depends on 22) The arrangement according to claim 22, wherein the first channel section extends from the first channel opening to the channel connection, the second channel section extends from the second channel opening to the channel connection, and the third channel section extends from the third channel opening to the channel connection. ### Claim 24 (depends on 22) The arrangement according to claim 22, wherein the liquid source is connected to the first channel opening and arranged at the distal end of the endoscope such that the liquid source is fluidly connected to the distal end of the endoscope and the liquid source and the distal end of the endoscope are sealed air-tight from the environment that surrounds the distal end of the endoscope and the liquid source. ### Claim 25 (depends on 22) The arrangement according to claim 22, wherein the sealing element is connected to one of the first, second or third channel opening such that the one of the first, second or third channel opening is sealed air-tight from the environment that surrounds the connection port. ### Claim 26 (depends on 25) The arrangement according to claim 25, wherein the sealing element is connected to the third channel opening. ### Claim 27 (depends on 26) The arrangement according to claim 26, wherein the sealing element is formed as a transparent sealing element. ### Claim 28 (depends on 27) The arrangement according to claim 27, wherein the transparent sealing element is configured as a closed transparent tube element, that is connected to the third channel opening. ### Claim 29 (depends on 22) The arrangement according to claim 22, wherein the first, second and third channels comprise one or more of: an air channel that extends from an air channel connection port to the distal end of the endoscope, a suction channel that extends from a suction channel connection port to the distal end of the endoscope, a water channel that extends from a water channel connection port to the distal end of the endoscope, and an auxiliary water channel that extends from an auxiliary water channel connection port to the distal end of the endoscope. ### Claim 30 (depends on 22) The arrangement according to claim 22, wherein the suction channel is formed by the first and second channel section, and the suction channel connection portion is formed by the second channel opening.