# US 9,039,703 B2 · Endoscopic surgical instrument > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,039,703 B2 - Document ID: US9039703B2 - Status: Granted - Kind: B2 - Application number: 13/264,590 - Filed: 2010-03-26 - Published: 2012-02-09 - Granted: 2015-05-26 - Earliest claimed: 2009-04-16 - Assignees: Erbe Elektromedizin GmbH - Applicants: Dietmar Karwei - Inventors: Dietmar Karwei - Web page: https://patentgrep.com/patent/US9039703B2 ## CPC - A61B 17/320016: {Endoscopic cutting instruments, e.g. arthroscopes, resectoscopes (A61B10/0233, A61B17/29, A61B17/3207 take precedence)} - A61B 17/3203: Fluid jet cutting instruments - A61B 18/1482: {having a long rigid shaft for accessing the inner body transcutaneously in minimal invasive surgery, e.g. laparoscopy} - A61B 18/1492: {having a flexible, catheter-like structure, e.g. for heart ablation (A61B18/1477 takes precedence)} - A61M 5/30: Syringes for injection by jet action, without needle, e.g. for use with replaceable ampoules or carpules - A61B 2017/00269: {endoscopic mucosal resection EMR} - A61B 2017/00526: {Methods of manufacturing} - A61B 2018/00589: {Coagulation} - A61B 2018/00601: {Cutting} - A61B 2018/1497: {Electrodes covering only part of the probe circumference} - A61M 2207/00: Methods of manufacture, assembly or production - Y10T 29/49117: Conductor or circuit manufacturing - Y10T 29/49826: Assembling or joining - 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)} - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract An endoscopic surgical instrument including a fluid jet device and an electrode device. The fluid jet device includes a pipe section with a nozzle on one distal end for a dissection and/or a needleless injection by means of a fluid and the electrode device is for cutting and/or coagulating tissue, the pipe section forming the electrode device. The surgical instrument further includes an insulating device attached to the distal end of the pipe section such that the tissue can only be brought into electrically conductive contact with a peripheral region of the pipe section and not with the distal end of the pipe section. ## Claims ### Claim 1 An endoscopic surgical instrument comprising: a fluid jet device comprising a pipe section with a nozzle on a distal end thereof for a dissection and/or a needleless injection by means of a fluid; an electrode device included in the pipe section, the electrode device for cutting and/or coagulating a tissue by means of RF current; and an insulating device attached to the distal end of the pipe section and configured to prevent electrically conductive contact between the tissue and the distal end of the pipe section. ### Claim 2 (depends on 1) The endoscopic surgical instrument of claim 1, wherein the insulating device is configured as a mechanical preparation device for the preparation of tissue. ### Claim 3 (depends on 1) The endoscopic surgical instrument of claim 1, further comprising a supply line for conveying an inert gas to the tissue. ### Claim 4 (depends on 3) The endoscopic surgical instrument of claim 3, wherein the electrode device further comprises a concentrating element arranged on the distal end of the pipe section in an aperture in the insulating device and having a beveled form to enhance a field strength generated by an electrical charge of the electrode device. ### Claim 5 (depends on 3) The endoscopic surgical instrument of claim 3, wherein the electrode device further comprises a concentrating element arranged on the distal end of the pipe section in an aperture in the insulating device and having a pointed form to enhance a field strength generated by an electrical charge of the electrode device. ### Claim 6 (depends on 1) The endoscopic surgical instrument of claim 1, further comprising a sheathing device arranged so as to movably enclose the electrode device such that the electrode device can be retracted into the sheathing device or projected out of said sheathing device. ### Claim 7 (depends on 6) The endoscopic surgical instrument of claim 6, further comprising stop devices arranged such that any retraction/projection of the electrode device is delimited by the stop devices. ### Claim 8 (depends on 7) The endoscopic surgical instrument of claim 7, wherein the stop devices are adjustable. ### Claim 9 (depends on 1) The endoscopic surgical instrument of claim 1, wherein the fluid jet device further comprises an electrically conductive supply line for supplying the fluid and the RF current, said electrically conductive supply line being in sealed and electrically conductive communication with the pipe section. ### Claim 10 (depends on 1) The endoscopic surgical instrument of claim 1, wherein the pipe section is made of a material having a melting point above 2000° C. ### Claim 11 (depends on 10) The endoscopic surgical instrument of claim 10, wherein the pipe section is made of tungsten. ### Claim 12 (depends on 11) The endoscopic surgical instrument of claim 11, wherein the pipe section is manufactured by a powder injection molding process. ### Claim 13 (depends on 1) The endoscopic surgical instrument of claim 1, wherein the insulating device is manufactured using a powder injection molding process. ### Claim 14 (depends on 1) The endoscopic surgical instrument of claim 1, wherein the insulating device is comprised of a ceramic. ### Claim 15 (depends on 14) The endoscopic surgical instrument of claim 14, wherein the insulating device is comprised of a material selected from the group consisting of zirconium oxide, aluminum oxide, yttrium oxide and mixtures thereof, or of ceramics having metal components originating from Group IVB (Ti and higher) or IIIA (Al and higher).