MULTI FREQUENCY AND MULTI POLARITY COMPLEX IMPEDANCE MEASUREMENTS TO ASSESS ABLATION LESIONS

摘要

A method of assessing a tissue ablation treatment, including positioning a medical device adjacent a target tissue; measuring a first impedance magnitude a first frequency with the medical device; measuring a first impedance phase at a second frequency with the medical device; ablating at least a portion of the target tissue with the medical device; measuring at second impedance magnitude at a third frequency with the medical device; measuring a second impedance phase at a fourth frequency with the medical device; comparing at least one of (i) the first and second impedance magnitudes and (ii) the first and second impedance phases; and providing an indication of the efficacy of the ablation treatment based at least in part on the comparison.

主权项

1. A medical system, comprising:
a medical device positionable proximate a tissue site, the medical device operable to treat the tissue site; and a control unit in communication with the medical device, the control unit programmed to:
receive baseline impedance characteristics from the medical device at a first plurality of frequencies;receive post-treatment impedance characteristics from the medical device at a second plurality of frequencies;compare the post-treatment impedance characteristics and the baseline impedance characteristics; andgenerate an indication of the efficacy of the treatment based at least in part on the comparison.