US 12,262,936 B2
Systems and methods for controlled electrosurgical coagulation
Donald L. Tonn, Superior, CO (US); James E. Dunning, Boulder, CO (US); William D. Faulkner, Boulder, CO (US); Jennifer R. McHenry, Denver, CO (US); Devon E. Scott-Drechsel, Superior, CO (US); and Eric M. Westra, Hudsonville, CO (US)
Assigned to Covidien LP, Mansfield, MA (US)
Filed by Covidien LP, Mansfield, MA (US)
Filed on Aug. 10, 2023, as Appl. No. 18/232,469.
Application 18/232,469 is a continuation of application No. 16/122,857, filed on Sep. 5, 2018, granted, now 11,744,631.
Claims priority of provisional application 62/562,110, filed on Sep. 22, 2017.
Claims priority of provisional application 62/562,012, filed on Sep. 22, 2017.
Claims priority of provisional application 62/562,078, filed on Sep. 22, 2017.
Prior Publication US 2023/0380882 A1, Nov. 30, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. A61B 18/12 (2006.01); A61B 18/00 (2006.01); A61B 18/14 (2006.01)
CPC A61B 18/1206 (2013.01) [A61B 18/1233 (2013.01); A61B 18/1442 (2013.01); A61B 18/1445 (2013.01); A61B 2018/00589 (2013.01); A61B 2018/00595 (2013.01); A61B 2018/00601 (2013.01); A61B 2018/00607 (2013.01); A61B 2018/0063 (2013.01); A61B 2018/00642 (2013.01); A61B 2018/00666 (2013.01); A61B 2018/00702 (2013.01); A61B 2018/00767 (2013.01); A61B 2018/00827 (2013.01); A61B 2018/00875 (2013.01); A61B 2018/1253 (2013.01); A61B 2018/126 (2013.01); A61B 2018/1266 (2013.01); A61B 2018/1462 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An electrosurgical generator, comprising:
a processor; and
a memory having stored thereon instructions which, when executed by the processor, cause the electrosurgical generator to:
control delivery of a treatment energy to an instrument, the treatment energy having an adjustable voltage ramp rate, wherein the adjustable voltage ramp rate is configured to be set to a ramp rate in a range of voltage ramp rates that effectuate coagulation before dissection and prevent dissection of grasped tissue;
receive signals from the instrument over time relating to a load impedance between a first electrode and a second electrode of the instrument;
when the load impedance is above a first threshold of a plurality of thresholds, select a voltage ramp rate from a plurality of voltage ramp rates in the range of voltage ramp rates to set the adjustable voltage ramp rate to the selected voltage ramp rate, and decrease, at the adjustable voltage ramp rate, a voltage of the treatment energy being delivered to the instrument, wherein each voltage ramp rate of the plurality of voltage ramp rates is associated with at least one threshold of the plurality of thresholds; and
when the load impedance is below the first threshold, set the adjustable voltage ramp rate to a ramp rate in the range of voltage ramp rates, and increase, at the adjustable voltage ramp rate, the voltage of the treatment energy being delivered to the instrument.