Back to results
US 9,956,035 B2Granted
Temperature measurement in catheter
AssigneeBiosense Webster (Israel) Ltd.
InventorsAssaf Govari, Christopher Thomas Beeckler, Andres Claudio Altmann
Life of this patent
Estimating the term…
Abstract
Ablation of cardiac tissue is carried out by inserting a probe having an ablation electrode and a plurality of microelectrodes into a body of a living subject to establish contact between two of the microelectrodes and target tissue, and energizing the ablation electrode. While the ablation electrode is energized impedances are measured between the microelectrodes, and the power level of the ablation electrode adjusted according to the impedances.
Claims12
An apparatus, comprising:
- a probe having an ablation electrode and a plurality of microelectrodes, wherein the microelectrodes are distributed circumferentially in a radially spaced apart relation on an external surface of the probe, or in perforations in the external surface of the probe;
- first electrical circuitry linked to the microelectrodes for determining impedances of the microelectrodes, wherein the first electrical circuitry is configured to operatively identify a pair of the microelectrodes having a highest and a second highest impedance for determining a bipolar impedance between the pair of the microelectrodes;
- second electrical circuitry configured for determining a tissue temperature responsively to the bipolar impedance;
- and
- a power generator linked to the ablation electrode.
2 more elements
An apparatus, comprising:
- a probe having an ablation electrode, a plurality of microelectrodes and an inflatable balloon, the balloon having a longitudinal axis and an exterior wall, the microelectrodes being disposed circumferentially about the longitudinal axis on the exterior wall;
- first electrical circuitry linked to the microelectrodes for determining impedances of the microelectrodes, wherein the first electrical circuitry is configured to operatively identify a pair of the microelectrodes having a highest and a second highest impedance for determining a bipolar impedance between the pair of the microelectrodes;
- second electrical circuitry configured for determining a tissue temperature responsively to the bipolar impedance;
- and
- a power generator linked to the ablation electrode.
2 more elements
Dependencies are inferred from the claim text.