US 12,076,070 B2
Time multiplexed waveform for selective cell ablation
Bruce R. Forsyth, Hanover, MN (US); Larry D. Canady, Jr., Ham Lake, MN (US); Jonathan Tyler Gorzycki, Blaine, MN (US); Timothy A Ostroot, Cokato, MN (US); and Hong Cao, Maple Grove, MN (US)
Assigned to BOSTON SCIENTIFIC SCIMED, INC., Maple Grove, MN (US)
Filed by BOSTON SCIENTIFIC SCIMED, INC., Maple Grove, MN (US)
Filed on Mar. 13, 2020, as Appl. No. 16/818,014.
Claims priority of provisional application 62/819,120, filed on Mar. 15, 2019.
Prior Publication US 2020/0289827 A1, Sep. 17, 2020
Int. Cl. A61B 18/12 (2006.01); A61B 18/00 (2006.01)
CPC A61B 18/1206 (2013.01) [A61B 18/12 (2013.01); A61B 2018/00577 (2013.01); A61B 2018/00613 (2013.01); A61B 2018/1246 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A method of delivering a multiphasic ablation waveform comprising:
generating a first output of a first polarity at a first amplitude for a first time period as a first phase;
generating a second output of a second polarity, opposite the first polarity, at a second amplitude for a second time period, the second time period being less than half the first time period; and
generating a third output using the second polarity at a third amplitude less than the second amplitude for a third time period, the third time period being greater than the first time period;
wherein the sum of the first, second and third outputs yields a balanced charge to limit muscle stimulation associated with the multiphasic ablation waveform; and
wherein the second output is delivered after the first output, and the third output is delivered after the second output.