RF generator system for surgical vessel sealing
First Claim
1. A method of providing power to an electrosurgical instrument comprising:
- generating a non-sinusoidal driving voltage having a substantially constant driving frequency;
providing the non-sinusoidal driving voltage to a series LC circuit having a resonant frequency of substantially twice the substantially constant driving frequency and configured to present an impedance that limits current spikes and voltage transient spikes during load fluctuations;
at least one of upconverting or downconverting the non-sinusoidal driving voltage;
generating a constant power having a quasi-sinusoidal current in the series LC circuit from the non-sinusoidal driving voltage; and
providing the constant power having the quasi-sinusoidal current to an electrical output, wherein the electrical output has a maximum threshold voltage of about 75 Volts, and wherein the electrical output is configured for coupling to an electrical input of a bipolar tissue-sealing surgical instrument.
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Accused Products
Abstract
Systems, methods, and apparatus for providing power to an electrosurgical instrument. A method of providing power to an electrosurgical instrument includes generating a non-sinusoidal driving voltage having a substantially constant driving frequency; providing the non-sinusoidal driving voltage to a series LC circuit having a resonant frequency of substantially twice the substantially constant driving frequency and configured to present an impedance that limits current spikes and voltage transient spikes during load fluctuations; generating a quasi-sinusoidal current in the series LC circuit from the non-sinusoidal driving voltage; and providing the quasi-sinusoidal current to an electrical output, wherein the electrical output is configured for coupling to an electrical input of a bipolar tissue-sealing surgical instrument.
285 Citations
19 Claims
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1. A method of providing power to an electrosurgical instrument comprising:
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generating a non-sinusoidal driving voltage having a substantially constant driving frequency; providing the non-sinusoidal driving voltage to a series LC circuit having a resonant frequency of substantially twice the substantially constant driving frequency and configured to present an impedance that limits current spikes and voltage transient spikes during load fluctuations; at least one of upconverting or downconverting the non-sinusoidal driving voltage; generating a constant power having a quasi-sinusoidal current in the series LC circuit from the non-sinusoidal driving voltage; and providing the constant power having the quasi-sinusoidal current to an electrical output, wherein the electrical output has a maximum threshold voltage of about 75 Volts, and wherein the electrical output is configured for coupling to an electrical input of a bipolar tissue-sealing surgical instrument. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A power supply for an electrosurgical instrument comprising:
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a power provider configured to provide a non-sinusoidal voltage at a substantially constant driving frequency and a variable amplitude; a series LC circuit configured to receive the non-sinusoidal voltage and provide a constant power having a quasi-sinusoidal current from the non-sinusoidal driving voltage, wherein the resonant frequency of the series LC circuit is substantially twice that of the substantially constant driving frequency, and wherein the series LC circuit is configured to present an impedance that limits current spikes and voltage transient spikes during load fluctuations; a buck-boost converter configured to at least one of upconvert or downconvert the non-sinusoidal driving voltage; and an electrical output configured to provide the quasi-sinusoidal current to a bipolar tissue-sealing electrosurgical instrument;
whereinthe electrical output has a constant power having a maximum voltage of about 75 Volts, and a maximum quasi-sinusoidal current of about 1.8 amperes, wherein the electrical output is configured for coupling to an electrical input of a bipolar tissue-sealing surgical instrument. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification