# US 12,420,061 B2 · Medical instrument with injection needles > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,420,061 B2 - Document ID: US12420061B2 - Status: Granted - Kind: B2 - Application number: 17/440,556 - Filed: 2020-03-19 - Published: 2022-05-12 - Granted: 2025-09-23 - Earliest claimed: 2019-03-20 - Assignees: Doc-Invent SA - Applicants: Doc-Invent SA - Inventors: Alain Mariller - Web page: https://patentgrep.com/patent/US12420061B2 ## CPC - A61M 25/0084: {being one or more injection needles} - A61B 17/3478: {Endoscopic needles, e.g. for infusion (biopsy needles A61B10/0233; catheters with injection needles A61M25/0067)} - A61M 2025/0087: {Multiple injection needles protruding laterally from the distal tip} - A61M 2210/1067: Anus - 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 The invention concerns an instrument, for a medical application, said instrument comprising a body (1), at least one needle, channel means (15) to bring a fluid to said at least one needle, and actuating means (6) for moving said at least one needle from a retracted position to an extended position by rotation of actuating means (6) with respect to the body. ## Claims ### Claim 1 An instrument for a medical application, the instrument comprising: a body with a longitudinal axis; at least one needle; a channel fluidically connected to the at least one needle to bring a fluid to said at least one needle, the channel comprising a first part and a second part; and an actuator configured to move said at least one needle between a retracted position inside the body and an extended position protruding from the body, the actuator comprising a shaft, the first part of the channel extending within the shaft, the second part of the channel extending outside the shaft, a movement of the at least one needle between the retracted position and the extended position being performed by a rotation of the actuator and the shaft relative to the body, wherein the movement of the at least one needle between the retracted position and the extended position is rectilinear and perpendicular to the longitudinal axis, wherein the shaft includes a first set of teeth, and wherein said at least one needle includes a support having a second set of teeth cooperating with the first set of teeth. ### Claim 2 (depends on 1) The instrument according to claim 1, wherein the shaft is configured to rotate inside the body. ### Claim 3 (depends on 1) The instrument according to claim 1, wherein the first set of teeth are circularly arranged around the shaft. ### Claim 4 (depends on 1) The instrument according to claim 1, wherein the first set of teeth of the shaft and the second set of teeth of the support element have the same pitch and are configured to cooperate with each other. ### Claim 5 (depends on 1) The instrument according to claim 1, wherein the at least one needle comprises at least three needles. ### Claim 6 (depends on 1) The instrument according to claim 1, wherein the channel is flexible to flex upon a movement of said at least one needle by the actuator. ### Claim 7 (depends on 1) The instrument according to claim 1, further comprising: a locking device to lock a position of the actuator when the at least one needle is in the retracted position and when the at least one needle is in the extended position. ### Claim 8 (depends on 1) The instrument according to claim 1, wherein the channel and the actuator are separate elements. ### Claim 9 (depends on 1) A method of using an instrument as defined in claim 1, the method comprising the steps of: inserting the instrument into a cavity; and injecting a fluid from outside the instrument to the cavity. ### Claim 10 (depends on 9) The method as defined in claim 9, wherein the step of injecting is made through at least one opening of the instrument. ### Claim 11 (depends on 9) The method as defined in claim 9, wherein the step of injecting is performed by the at least one needle that is protruding from the instrument in the extended position. ### Claim 12 (depends on 9) The method as defined in claim 9, further comprising the step of: moving the at least one needle to the extended position after the step of inserting and before the step of injecting.