US 10,376,305 B2
Methods and systems for advanced harmonic energy
David C. Yates, West Chester, OH (US); Amy M. Krumm, Cincinnati, OH (US); and Mark A. Davison, Mason, OH (US)
Assigned to Ethicon LLC, Guaynabo, PR (US)
Filed by Ethicon Endo-Surgery, LLC, Guaynabo, PR (US)
Filed on Aug. 5, 2016, as Appl. No. 15/229,562.
Prior Publication US 2018/0036065 A1, Feb. 8, 2018
Int. Cl. A61B 18/12 (2006.01); A61B 18/14 (2006.01); A61B 18/00 (2006.01); A61B 17/32 (2006.01)
CPC A61B 18/1445 (2013.01) [A61B 18/1206 (2013.01); A61B 18/1482 (2013.01); A61B 17/320092 (2013.01); A61B 2018/0063 (2013.01); A61B 2018/00208 (2013.01); A61B 2018/00642 (2013.01); A61B 2018/00678 (2013.01); A61B 2018/00702 (2013.01); A61B 2018/00875 (2013.01); A61B 2018/00994 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A surgical system comprising:
an end effector comprising at least one energy delivery component configured to transmit electrosurgical energy to tissue at a surgical site; and
a control circuit communicatively coupled to the at least one energy delivery component and programmed to:
for a first application period, cause the at least one energy delivery component to transmit the electrosurgical energy at a first power level, the first application period comprising a point in time where impedance of the tissue reaches a minimum impedance value;
for a second application period after the first application period, cause the at least one energy delivery component to transmit the electrosurgical energy, starting from a predetermined proportion of a transition impedance threshold level and decreasing the electrosurgical energy at a steady rate from the first power level until a second power level is reached, wherein the second power level is lower than the first power level and the second application period comprises a point in time where the impedance of the tissue rises above the minimum impedance value; and
for a third application period after the second application period, directly after reaching the second power level, cause the at least one energy delivery component to reduce the second power level to a third power level while maintaining a constant level of the impedance of the tissue to transmit the electrosurgical energy at the third power level upon the impedance of the tissue reaching the transition impedance threshold level, the third power level lower than the second power level and the third application period comprising a point in time where the impedance of the tissue rises above the transition impedance threshold level.