US 12,213,722 B2
Apparatus and method for electrosurgery
Satoshi Honda, Hachioji (JP); Shunsuke Matsui, Hachioji (JP); Danilo Legaspi, Hachioji (JP); and Akinori Kabaya, Hino (JP)
Assigned to Olympus Medical Systems Corp., Tokyo (JP)
Filed by OLYMPUS MEDICAL SYSTEMS CORP., Tokyo (JP)
Filed on Dec. 9, 2021, as Appl. No. 17/546,374.
Claims priority of provisional application 63/151,993, filed on Feb. 22, 2021.
Prior Publication US 2022/0265338 A1, Aug. 25, 2022
Int. Cl. A61B 18/12 (2006.01); A61B 18/00 (2006.01)
CPC A61B 18/1206 (2013.01) [A61B 2018/0063 (2013.01); A61B 2018/00755 (2013.01)] 20 Claims
OG exemplary drawing
 
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.