US 11,712,295 B2
Multi-purpose sensing and radiofrequency (RF) ablation spiral electrode for catheter
Assaf Govari, Haifa (IL); Yehuda Algawi, Binyamina (IL); and Andres Claudio Altmann, Haifa (IL)
Assigned to Biosense Webster (Israel) Ltd., Yokneam (IL)
Filed by Biosense Webster (Israel) Ltd., Yokneam (IL)
Filed on Dec. 30, 2019, as Appl. No. 16/730,128.
Prior Publication US 2021/0196371 A1, Jul. 1, 2021
Int. Cl. A61B 18/14 (2006.01); A61B 5/06 (2006.01); A61B 18/00 (2006.01); A61B 34/20 (2016.01); A61B 5/01 (2006.01)
CPC A61B 18/1492 (2013.01) [A61B 5/061 (2013.01); A61B 5/01 (2013.01); A61B 5/065 (2013.01); A61B 2018/00577 (2013.01); A61B 2018/00791 (2013.01); A61B 2018/00875 (2013.01); A61B 2018/147 (2013.01); A61B 2018/1435 (2013.01); A61B 2034/2051 (2016.02); A61B 2034/2053 (2016.02); A61B 2562/0223 (2013.01); A61B 2562/0271 (2013.01)] 8 Claims
OG exemplary drawing
 
1. An electrical apparatus, comprising:
a probe for insertion into a body of a patient, the probe having a three-dimensional dome-shaped distal tip;
a spiral electrode disposed on the three-dimensional dome-shaped distal tip such that the spiral electrode is conformed over the three-dimensional dome-shaped distal tip of the probe with a center of the spiral electrode being disposed on the three-dimensional dome-shaped distal tip, the center of the spiral electrode is connected to a first conductor and a perimeter of the spiral electrode connected to a second conductor, the first conductor and the second conductor both being connected to a single conductor proximal the spiral electrode; and
an interface circuit, which is configured to:
transfer a radiofrequency (RF) ablation signal via the single conductor to the first and second conductors and to the spiral electrode for ablating tissue in the body;
output a voltage via the first and second conductors that develops across the spiral electrode in response to an external magnetic field, for measuring a position of a distal end in the body; and
transfer electrical current via the first and second conductors through the spiral electrode for measuring a resistivity that is indicative of tissue temperature in a vicinity of the spiral electrode.