# US 12,213,722 B2 · Apparatus and method for electrosurgery > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,213,722 B2 - Document ID: US12213722B2 - Status: Granted - Kind: B2 - Application number: 17/546,374 - Filed: 2021-12-09 - Published: 2022-08-25 - Granted: 2025-02-04 - Earliest claimed: 2021-02-22 - Assignees: Olympus Medical Systems Corp. - Applicants: Olympus Medical Systems Corp. - Inventors: Satoshi Honda; Shunsuke Matsui; Danilo Legaspi; Akinori Kabaya - Web page: https://patentgrep.com/patent/US12213722B2 ## CPC - A61B 18/085: {Forceps, scissors} - A61B 18/1206: {Generators therefor} - A61B 2018/0063: {Sealing} - A61B 2018/00702: {Power or energy} - A61B 2018/00755: {Resistance or impedance} - A61B 2018/00875: {Resistance or impedance} - A61B 2018/00916: {with means for switching or controlling the main function of the instrument or device} - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) ## Abstract Methods and systems for sealing biological tissue using high frequency electrical energy determines a first-instance size of the biological tissue based on an initial impedance determination and applies electrical energy to the biological tissue based on the first-instance size determination, during which an in-process parameter is detected. A second-instance size of the biological tissue is determined based on the detected in-process parameter. When the second-instance size is different from the first-instance size, the second-instance electrical energy is different than the first-instance electrical energy; and when the second-instance size is the same as the first-instance size, the second-instance electrical is the same as the first-instance electrical energy. In-process parameter include (i) a value of in-process impedance of the biological tissue, (ii) a rate of change of the in-process impedance of the biological tissue, (iii) a value of in-process integrated power delivered to the biological tissue, or (iv) a combination thereof. ## Claims ### Claim 1 A method for sealing a biological tissue using high frequency electrical energy, the method comprising: determining an initial impedance of the biological tissue; determining a first-instance size of the biological tissue based on the initial impedance; applying a first-instance electrical energy to the biological tissue, wherein a value of voltage of the first-instance electrical energy and a length of time of application of the first-instance electrical energy are both based on the first-instance size of the biological tissue; detecting an in-process parameter during applying the first-instance electrical energy to the biological tissue, wherein the in-process parameter is (i) a value of in-process impedance of the biological tissue, (ii) a rate of change of the in-process impedance of the biological tissue, (iii) a value of in-process integrated power delivered to the biological tissue, or (iv) a combination thereof; determining a second-instance size of the biological tissue based on the detected in-process parameter; and applying a second-instance electrical energy to the biological tissue, wherein a value of voltage of the second-instance electrical energy and a length of time of application of the second-instance electrical energy are both based on the second-instance size of the biological tissue. ### Claim 2 (depends on 1) The method according to claim 1, wherein, when the first-instance size of the biological tissue based on the initial impedance is large and the value of in-process impedance of the biological tissue is greater than 200Ω, then the second-instance size of the biological tissue is determined as small, and wherein the second-instance electrical energy to the biological tissue is different than the first-instance electrical energy to the biological tissue. ### Claim 3 (depends on 1) The method according to claim 1, wherein the in-process parameter is the rate of change of the in-process impedance of the biological tissue. ### Claim 4 (depends on 1) The method according to claim 1, wherein the in-process parameter is the value of in-process integrated power delivered to the biological tissue. ### Claim 5 (depends on 1) The method according to claim 1, wherein, when the second-instance size of the biological tissue is different than the first-instance size of the biological tissue, the second-instance electrical energy to the biological tissue is different than the first-instance electrical energy to the biological tissue. ### Claim 6 A system for sealing a biological tissue, the system comprising: an energy source configured to generate high frequency electrical energy; an end effector operably connected to the energy source and configured to provide the high frequency electrical energy to the biological tissue; and a controller operably connected to the energy source and configured to: determine an initial impedance of the biological tissue; determine a first-instance size of the biological tissue based on the initial impedance; apply a first-instance electrical energy to the biological tissue, wherein a value of voltage of the first-instance electrical energy and a length of time of application of the first-instance electrical energy are both based on the first-instance size of the biological tissue; detect an in-process parameter during applying the first-instance electrical energy to the biological tissue, wherein the in-process parameter is (i) a value of in-process impedance of the biological tissue, (ii) a rate of change of the in-process impedance of the biological tissue, (iii) a value of in-process integrated power delivered to the biological tissue, or (iv) a combination thereof; determine a second-instance size of the biological tissue based on the detected in-process parameter; and apply a second-instance electrical energy to the biological tissue, wherein a value of voltage of the second-instance electrical energy and a length of time of application of the second-instance electrical energy are both based on the second-instance size of the biological tissue. ### Claim 7 (depends on 6) The system according to claim 6, wherein the controller is configured to apply the second-instance electrical energy is to the biological tissue until sealing of the tissue is complete. ### Claim 8 (depends on 6) The system according to claim 6, wherein, when the second-instance size of the biological tissue is different than the first-instance size of the biological tissue, the second-instance electrical energy to the biological tissue is different than the first-instance electrical energy to the biological tissue. ### Claim 9 (depends on 6) The system according to claim 6, wherein, when the second-instance size of the biological tissue is the same as the first-instance size of the biological tissue, the second-instance electrical energy to the biological tissue is the same as the first-instance electrical energy to the biological tissue. ### Claim 10 (depends on 6) The system according to claim 6, wherein the in-process parameter is the value of in-process impedance of the biological tissue. ### Claim 11 (depends on 6) The system according to claim 6, wherein the in-process parameter is the rate of change of the in-process impedance of the biological tissue. ### Claim 12 (depends on 6) The system according to claim 6, wherein the in-process parameter is the value of in-process integrated power delivered to the biological tissue. ### Claim 13 A controller for a device for sealing a biological tissue, the controller being operably connected to an energy source and configured to: determine an initial impedance of the biological tissue; determine a first-instance size of the biological tissue based on the initial impedance; apply a first-instance electrical energy to the biological tissue, wherein a value of voltage of the first-instance electrical energy and a length of time of application of the first-instance electrical energy are both based on the first-instance size of the biological tissue; detect an in-process parameter during applying the first-instance electrical energy to the biological tissue, wherein the in-process parameter is (i) a value of in-process impedance of the biological tissue, (ii) a rate of change of the in-process impedance of the biological tissue, (iii) a value of in-process integrated power delivered to the biological tissue, or (iv) a combination thereof; determine a second-instance size of the biological tissue based on the detected in-process parameter; and apply a second-instance electrical energy to the biological tissue, wherein a value of voltage of the second-instance electrical energy and a length of time of application of the second-instance electrical energy are both based on the second-instance size of the biological tissue. ### Claim 14 (depends on 13) The controller according to claim 13, wherein the controller is configured to apply the second-instance electrical energy is to the biological tissue until sealing of the tissue is complete. ### Claim 15 (depends on 13) The controller according to claim 13, wherein, when the second-instance size of the biological tissue is different than the first-instance size of the biological tissue, the second-instance electrical energy to the biological tissue is different than the first-instance electrical energy to the biological tissue. ### Claim 16 (depends on 13) The controller according to claim 13, wherein, when the second-instance size of the biological tissue is the same as the first-instance size of the biological tissue, the second-instance electrical energy to the biological tissue is the same as the first-instance electrical energy to the biological tissue. ### Claim 17 (depends on 13) The controller according to claim 13, wherein the in-process parameter is the value of in-process impedance of the biological tissue. ### Claim 18 (depends on 17) The controller according to claim 17, wherein, when the first-instance size of the biological tissue based on the initial impedance is large and the value of in-process impedance of the biological tissue is greater than 200Ω, then the second-instance size of the biological tissue is determined as small, and wherein the second-instance electrical energy to the biological tissue is different than the first-instance electrical energy to the biological tissue. ### Claim 19 (depends on 13) The controller according to claim 13, wherein the in-process parameter is the rate of change of the in-process impedance of the biological tissue. ### Claim 20 (depends on 13) The controller according to claim 13, wherein the in-process parameter is the value of in-process integrated power delivered to the biological tissue.