US 12,150,702 B1
Generator and catheter for tissue ablation
Sanjiv M. Narayan, Palo Alto, CA (US); Bret Anders Herscher, Cupertino, CA (US); and David Krawzsenek, Mountain View, CA (US)
Assigned to PhysCade, Inc., Palo Alto, CA (US)
Filed by PhysCade, Inc., Palo Alto, CA (US)
Filed on Jun. 4, 2024, as Appl. No. 18/733,393.
Claims priority of provisional application 63/655,579, filed on Jun. 3, 2024.
Int. Cl. A61B 18/14 (2006.01); A61B 18/12 (2006.01); A61B 18/00 (2006.01)
CPC A61B 18/1492 (2013.01) [A61B 18/1206 (2013.01); A61B 2018/00023 (2013.01); A61B 2018/00077 (2013.01); A61B 2018/00351 (2013.01); A61B 2018/00577 (2013.01); A61B 2018/0072 (2013.01); A61B 2018/00821 (2013.01); A61B 2018/128 (2013.01)] 28 Claims
OG exemplary drawing
 
1. A power generator for generating ablating energy for a catheter to treat a heart rhythm disorder, the power generator comprising:
a first power driver having a first port configured to be connected to a first wire of a first electrode of the catheter to deliver a first current to the first electrode to generate first ablation energy for treatment of a biological tissue;
a second power driver having a second port configured to be connected to a second wire of a second electrode of the catheter to deliver a second current to the second electrode to generate second ablation energy for treatment of the biological tissue, wherein the first power driver and the second power driver are capable of generating different currents and delivering the different currents respectively to the first electrode and the second electrode of the catheter;
a first voltage sensor configured to measure a first thermocouple voltage corresponding to the first wire of the first electrode of the catheter;
a second voltage sensor configured to measure a second thermocouple voltage corresponding to the second wire of the second electrode of the catheter; and
a controller configured to:
determine a first temperature corresponding to the first electrode based on the first thermocouple voltage;
determine a second temperature corresponding to the second electrode based on the second thermocouple voltage;
regulate the first power driver and the second power driver to maintain the first temperature and the second temperature within a predetermined range of temperature for at least 90% of duration.