Microwave ablation system with dielectric temperature probe
First Claim
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1. An ablation system, comprising:
- a generator adapted to selectively provide ablation energy to an ablation probe;
an ablation probe operably coupled to the generator and adapted to receive the ablation energy from the generator and to deliver the ablation energy to tissue;
a controller operatively coupled to the generator, including;
a processor;
a memory operatively coupled to the processor;
a database operatively coupled to the processor and configured to store a tissue status lookup table having a first dimension representative of tissue temperature, a second dimension representative of tissue permittivity, and a third dimension representative of tissue loss factor;
a tissue sensor probe operatively coupled to the controller and having a distal end and a proximal end, including;
a dielectric sensor disposed at a distal end of the tissue sensor probe and configured to transmit a test signal to tissue, receive at least a portion of a reflected test signal from tissue, and provide a dielectric sensor signal corresponding to a measured tissue permittivity and loss factor;
a temperature sensor disposed at a distal end of the tissue sensor probe and configured to provide a temperature sensor signal corresponding to a measured temperature of tissue;
wherein a dielectric sensor circuit is operatively coupled to the processor and is adapted to receive the dielectric sensor signal from the tissue sensor probe; and
a temperature sensor circuit is operatively coupled to the processor and is adapted to receive the temperature sensor signal from the tissue sensor probe; and
wherein the processor is configured to utilize each of the measured tissue temperature, the measured tissue permittivity, and the measured tissue loss factor as indices into the tissue status lookup table to identify a tissue status.
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Abstract
An electromagnetic surgical ablation system having a generator adapted to selectively provide surgical ablation energy to an ablation probe, and methods of operating same, are disclosed. The system includes a controller operatively coupled to the generator, and a tissue sensor probe operatively coupled to the controller. The tissue sensor provides a tissue temperature and at least one tissue dielectric property to the controller. During an electromagnetic tissue ablation procedure, the controller monitors tissue temperature and the at least one tissue dielectric property to determine tissue status, and to activate and deactivate the generator in accordance therewith.
324 Citations
8 Claims
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1. An ablation system, comprising:
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a generator adapted to selectively provide ablation energy to an ablation probe; an ablation probe operably coupled to the generator and adapted to receive the ablation energy from the generator and to deliver the ablation energy to tissue; a controller operatively coupled to the generator, including; a processor; a memory operatively coupled to the processor; a database operatively coupled to the processor and configured to store a tissue status lookup table having a first dimension representative of tissue temperature, a second dimension representative of tissue permittivity, and a third dimension representative of tissue loss factor; a tissue sensor probe operatively coupled to the controller and having a distal end and a proximal end, including; a dielectric sensor disposed at a distal end of the tissue sensor probe and configured to transmit a test signal to tissue, receive at least a portion of a reflected test signal from tissue, and provide a dielectric sensor signal corresponding to a measured tissue permittivity and loss factor; a temperature sensor disposed at a distal end of the tissue sensor probe and configured to provide a temperature sensor signal corresponding to a measured temperature of tissue; wherein a dielectric sensor circuit is operatively coupled to the processor and is adapted to receive the dielectric sensor signal from the tissue sensor probe; and a temperature sensor circuit is operatively coupled to the processor and is adapted to receive the temperature sensor signal from the tissue sensor probe; and wherein the processor is configured to utilize each of the measured tissue temperature, the measured tissue permittivity, and the measured tissue loss factor as indices into the tissue status lookup table to identify a tissue status. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification