# US 5,704,925 A · Medical instrument for injecting liquids into a hollow organ and/or drawing off liquids from a hollow organ, in particular a bile duct > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 5,704,925 A - Document ID: US5704925A - Status: Granted - Kind: A - Application number: 08/385,666 - Filed: 1995-02-08 - Granted: 1998-01-06 - Earliest claimed: 1994-02-09 - Assignees: Aerztliche Mechanik Udo Lindeke & Sohn - Inventors: Gert Otten; Carsten Lindeke - Web page: https://patentgrep.com/patent/US5704925A ## CPC - A61B 17/282: {Jaws} - A61B 17/00234: {for minimally invasive surgery (A61B17/0218, A61B17/0469, A61B17/12013, A61B17/1285, A61B17/29, A61B17/320016 take precedence)} - A61M 1/85: {with gas or fluid supply means, e.g. for supplying rinsing fluids or anticoagulants (for negative pressure wound therapy A61M1/92, A61M1/94; combined with tracheal tubes A61M16/0463; dental instruments with combined rinsing and aspirating A61C17/0208)} - A61B 17/3421: {Cannulas} - A61B 2017/2926: {Details of heads or jaws} - A61B 2017/2945: {Curved jaws} - A61B 2018/1432: {curved} - A61B 2217/005: with suction drainage system - A61B 2217/007: with irrigation system - A61M 3/0279: {Cannula; Nozzles; Tips; their connection means} - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) - 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)} ## Abstract Medical instrument for injecting liquids into a hollow organ and/or drawing off liquids from a hollow organ, in particular a bile duct. Clamping apparatus are associated with the hollow needle of the instrument, this instrument being constructed as a tubular shaft, and the tissue of the hollow organ can be securely enclosed by these clamping apparatus between an entrance opening in the hollow organ and an outlet opening of the hollow needle in such a way that no liquid can escape between the tissue and the hollow needle. ## Claims ### Claim 1 A medical instrument for injecting liquid into a hollow organ and/or drawing off liquid from a hollow organ, such as a bile duct comprising: a shaft; a hollow needle which can be inserted at a free end thereof into the hollow organ via an entrance opening of the organ, said needle being mounted within said shaft; and clamping means associated with the hollow needle and mounted within said shaft for enclosing the tissue of the hollow organ, said clamping means for clamping at least between an entrance opening of the hollow organ and an outlet opening of the hollow needle at said free end thereof so that no liquid can escape between the tissue and the hollow needle; wherein said free end of the hollow needle includes a curved insertion region and the tissue can be sealed against the hollow needle in the curved insertion region of said needle by said clamping means. ### Claim 2 (depends on 1) The medical instrument according to claim 1, wherein the clamping means include forceps having jaws movable relative to one another in such a way that the hollow needle and tissue are securely enclosed by a forceps mouth in a clamping position or are released in an initial position, said instrument including means to operate said forceps. ### Claim 3 (depends on 2) The medical instrument according to claim 2, wherein the forceps mouth is formed by at least one prong of each jaw and the prongs are arrangable so as to mesh with one another. ### Claim 4 (depends on 3) The medical instrument according to claim 3, wherein one jaw ends in two prongs arranged in the shape of a fork and the other jaw ends in one prong which engages in the fork-shaped prongs in a clamping position. ### Claim 5 (depends on 4) The medical instrument according to claim 4, wherein at least the prongs extend in a roughly curved manner in the direction of the hollow needle so that the hollow needle and tissue can be enclosed in the radial direction of said insertion region of said needle and in an approximately uniform manner around the circumference of the hollow needle. ### Claim 6 (depends on 5) The medical instrument according to claim 5, wherein the prongs are deflected in the direction of said insertion part of the hollow needle and the deflection roughly corresponds to the curvature of the hollow needle in the opposite direction. ### Claim 7 (depends on 4) The medical instrument according to claim 4, wherein at least one prong surface is profiled so as to securely hold the tissue. ### Claim 8 (depends on 2) The medical instrument according to claim 2, wherein said shaft is tubular, wherein said forceps include a base body; said base body of the forceps being mounted within the tubular shaft, the forceps extending adjacent to the hollow needle and emerging from the head of a tubular shaft, the jaws of the forceps being articulated at the base body so as to be swivelable in opposite directions. ### Claim 9 (depends on 8) The medical instrument according to claim 8, including a handle for holding the instrument and operating said forceps, said handle being of scissor-like form, one half of said scissor-like handle being connected in a stationary manner with the base body and wherein a rod linkage for actuating the jaws of the forceps is articulated at another half of the handle which swivels relative to the other half. ### Claim 10 (depends on 9) The medical instrument according to claim 9, wherein a retaining device is mounted on at least one of the handles so as to fix the handle halves and jaws in a defined manner relative to one another. ### Claim 11 (depends on 8) The medical instrument according to claim 8, including a handle mounted on said clamping means for holding the instrument and actuating the forceps, said handle being arranged at the end of a tubular shaft located opposite the jaws. ### Claim 12 (depends on 1) The medical instrument according to claim 1, wherein said shaft is tubular, wherein a free end of said hollow needle emerges from an end of the tubular shaft and said needle extends parallel and eccentrically relative to the tubular shaft. ### Claim 13 (depends on 12) The medical instrument according to claim 12, wherein a connection exits from a central region of said tubular shaft and is connected with the hollow needle and liquid can be directed into or out of the hollow needle by way of said connection.