US 11,918,270 B2
Electrosurgical generator, electrosurgical system, and method of operating an electrosurgical generator
Jelle Dijkstra, Berlin (DE); Veronika Handrick, Berlin (DE); Andreas Karrasch, Berlin (DE); and Frank Breitsprecher, Berlin (DE)
Assigned to OLYMPUS WINTER & IBE GMBH, Hamburg (DE)
Filed by OLYMPUS WINTER & IBE GMBH, Hamburg (DE)
Filed on Mar. 29, 2021, as Appl. No. 17/216,091.
Claims priority of application No. 102020108614.8 (DE), filed on Mar. 27, 2020.
Prior Publication US 2021/0298811 A1, Sep. 30, 2021
Int. Cl. A61B 18/12 (2006.01); A61B 18/04 (2006.01); A61B 18/16 (2006.01); G05F 1/12 (2006.01); H03K 5/003 (2006.01); A61B 18/00 (2006.01); A61B 18/14 (2006.01)
CPC A61B 18/042 (2013.01) [A61B 18/1206 (2013.01); A61B 18/16 (2013.01); G05F 1/12 (2013.01); H03K 5/003 (2013.01); A61B 2018/00601 (2013.01); A61B 2018/00625 (2013.01); A61B 2018/00678 (2013.01); A61B 2018/00767 (2013.01); A61B 2018/00833 (2013.01); A61B 2018/00875 (2013.01); A61B 2018/00892 (2013.01); A61B 2018/1407 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A method of operating an electrosurgical generator, wherein the method comprising:
generating an AC output voltage and supplying the AC output voltage to outputs of the electrosurgical generator, wherein a maximum AC output voltage value is predefined for the AC output voltage;
determining a load present at the outputs and comparing the load with a threshold value, which is defined such that a load falling below this threshold value indicates an occurrence of a vaporization phase;
wherein, as long as the load remains below the threshold value, a maximum AC output voltage value is preset such that the maximum AC output voltage value is lower than a preset maximum output voltage value that is set when the threshold value is exceeded;
controlling the AC output voltage based on the preset maximum AC output voltage value;
establishing a vapor bubble as part of a vaporization phase during an initial phase;
creating arcing as part of an ignition phase during the initial phase; and
during the initial phase, applying the maximum AC output voltage value; and
if the threshold value is exceeded, applying the preset maximum output voltage value that is higher than the maximum AC output voltage value.