Electrosurgical system employing multiple electrodes and method thereof
First Claim
1. A system for heat ablation of tissue in a patient comprising:
- a radiofrequency (RF) source for supplying RF energy;
at least two electrodes configured to apply RF energy to tissue;
at least one return electrode for returning the RF energy to the RF source; and
a controller configured to sequentially apply the RF energy to each of the said at least two electrodes for a pre-determinable period of time, wherein said pre-determinable period of time is determined by at least a surgical procedure and the number of electrodes, the controller further including;
a determiner configured to determine an off time for a next electrode in sequence;
a comparator configured to compare the off time for the next electrode in sequence to a predetermined minimum off time;
wherein the controller skips the next electrode in sequence if the off time for the next electrode in sequence is less than the predetermined minimum time off.
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Accused Products
Abstract
A system and method for heat ablation of tissue in which energy is sequentially applied to at least two electrodes inserted into tissue. The system is comprised of a radiofrequency (RF) source for supplying RF energy, at least two electrodes configured to apply RF energy to tissue, at least one return electrode for returning the RF energy to the RF source, and a controller configured to sequentially apply the RF energy to each of the at least two electrodes. The sequential delivery of energy is determined by the measured current and voltage, the calculated impedance at each of the electrodes and the timing for each electrode. An internal load may be activated with the previously activated channel and remain on until the next channel is activated to avoid the generator from having an open circuit.
192 Citations
15 Claims
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1. A system for heat ablation of tissue in a patient comprising:
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a radiofrequency (RF) source for supplying RF energy; at least two electrodes configured to apply RF energy to tissue; at least one return electrode for returning the RF energy to the RF source; and a controller configured to sequentially apply the RF energy to each of the said at least two electrodes for a pre-determinable period of time, wherein said pre-determinable period of time is determined by at least a surgical procedure and the number of electrodes, the controller further including; a determiner configured to determine an off time for a next electrode in sequence; a comparator configured to compare the off time for the next electrode in sequence to a predetermined minimum off time; wherein the controller skips the next electrode in sequence if the off time for the next electrode in sequence is less than the predetermined minimum time off. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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Specification