US 12,329,447 B2
Tissue ablation catheter with an insulator between inner and outer electrodes
Steven Mickelsen, Cardiff by the Sea, CA (US)
Assigned to FIELD MEDICAL, INC., Dover, DE (US)
Filed by FIELD MEDICAL, INC., Dover (DE)
Filed on Jul. 3, 2023, as Appl. No. 18/346,575.
Application 18/346,575 is a continuation of application No. 18/078,795, filed on Dec. 9, 2022, granted, now 11,690,671.
Prior Publication US 2024/0189022 A1, Jun. 13, 2024
Int. Cl. A61B 18/14 (2006.01); A61B 18/00 (2006.01)
CPC A61B 18/1492 (2013.01) [A61B 2018/00083 (2013.01); A61B 2018/00577 (2013.01); A61B 2018/00767 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A tissue ablation catheter with varying field directions, comprising:
a tubular element comprising
a distal end configured to be placed proximal to a tissue to be ablated;
a proximal end opposite said distal end;
an inner surface surrounding a lumen;
an outer surface; and,
an electrical insulator between said inner surface and said outer surface;
one or more inner electrodes coupled to said inner surface, each offset away from said distal end in a proximal direction towards said proximal end;
one or more outer electrodes coupled to said outer surface; and,
a controller coupled to said one or more inner electrodes and to said one or more outer electrodes and configured to
set voltages of said one or more inner electrodes and voltages of said one or more outer electrodes to generate an electric field outside said tubular element that induces ablation of said tissue to be ablated by electroporation; and,
modify the voltages of said one or more inner electrodes and said one or more outer electrodes over time to change a direction of said electric field outside said tubular element over time.