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 |
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.
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