Electroconvergent cautery system
OwnerWilliam S. Yamanashi, Arun Angelo Patilinventors
Life of this patent
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Abstract
A surgical tool for surgically treating tissue in a patient comprising a radio frequency power generator for creating an alternating current having an impedance matching circuit connected thereto for matching the impedance of a surgical instrument with the radio frequency generator. A loading and tuning coil is connected to a watts/ampere meter which is connected to the impedance matching circuit. The loading and tuning coil is connected to a surgical instrument which has a tip for focusing the radio frequency current at the region of the tissue such that the tissue being contacted is instantaneously vaporized and cut and/or cauterized.
Claims13
A surgical tool for surgically treating tissue in a patient, comprising:
- a radio frequency power generator for creating an alternating current of a pre-selected frequency;
- said radio frequency generator including an oscillator, a buffer amplifier and a power amplifier;
- said buffer amplifier and said power amplifier being series connected;
- an impedance matching means connected to said power amplifier for matching the impedance of a probe with the radio frequency generator;
- a watts/ampere meter connected to said impedance matching means;
- a loading and tuning coil connected to said watts/ampere meter;
- a probe for contact with the tissue;
- said loading and tuning coil being connected to said probe,
- said probe having a tip means for transmitting, receiving and focusing the radio frequency current at the region of the tissue such that the tissue being contacted is instantaneously vaporized, cut and/or cauterized.
A surgical tool for treating tissue comprising the combination of:
- (a) a radio frequency source means for creating an alternating current for a preselected frequency, waveform and duty cycle;
- (b) an electrically conductive and insulated metal probe including an exposed and uninsulated tip means for contact with the region of the tissue to be treated;
- (c) An impedance matching means interconnecting said probe with said radio frequency source;
- (d) a loading and tuning coil means imposed between said impedance matching device and said probe and being located remote from said probe and the tissue to be treated;
- (e) said loading and tuning coil functioning as an autotransformer whereby when said tip means contacts the tissue to be treated, the mismatch between the radio frequency generator and the tip means is nullified resulting in a high bolus at said tip means;
- and
- (f) said loading and tuning coil causing the current at said tip means to capacitatively couple with the return circuit from said tip means thereby drawing the current back into the return circuit.
Dependencies are inferred from the claim text.