Adjusting phases of multiphase ablation generator to detect contact
AssigneeBiosense Webster (Israel) Ltd.
InventorAssaf Govari
Life of this patent
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Abstract
A radio frequency (RF) ablation system is disclosed including signal generator circuitry and control circuitry. The signal generator circuitry is configured to generate a plurality of RF ablation current signals each having a respective phase and a respective amplitude. The control circuitry is configured to reduce crosstalk between a first RF ablation signal of the plurality of RF ablation current signals and a second RF ablation signal of the plurality of RF ablation current signals by adjusting the respective phase of the first RF ablation signal in relation to the respective phase of the second RF ablation signal such that the respective phase of the first RF ablation signal is different than the respective phase of the second RF ablation signal.
Claims17
A radio frequency (RF) ablation system, comprising:
- signal generator circuitry configured to generate a plurality of RF ablation current signals each having a respective phase and a respective amplitude;
- and
- control circuitry configured to reduce crosstalk between a first RF ablation signal of the plurality of RF ablation current signals and a second RF ablation signal of the plurality of RF ablation current signals, by:
- adjusting the respective phase of the first RF ablation signal in relation to the respective phase of the second RF ablation signal such that the respective phase of the first RF ablation signal is different than the respective phase of the second RF ablation signal;
- and
- adjusting the respective amplitude of the first RF ablation signal in relation to the respective amplitude of the second RF ablation signal.
A method comprising:
- generating a plurality of RF ablation current signals each having a respective phase and a respective amplitude in an ablation mode;
- and
- reducing crosstalk between a first RF ablation signal of the plurality of RF ablation current signals and a second RF ablation signal of the plurality of RF ablation current signals, in the ablation mode, by adjusting the respective phase of the first RF ablation signal in relation to the respective phase of the second RF ablation signal, based at least in part on a return current comprising a superposition of the plurality of RF ablation current signals, such that the respective phase of the first RF ablation signal is different than the respective phase of the second RF ablation signal.
Dependencies are inferred from the claim text.