Electronic coagulation scalpel
First Claim
1. An electronic scalpel comprising:
- a manipulator having an electrode for cutting tissue and coagulation of blood;
a rectifying circuit for supplying a rectified voltage and a direct voltage;
a pilot circuit;
a radio frequency circuit including an electronic switch fed by said rectified voltage and controlled by the pilot circuit for producing an output wave, said radio frequency circuit producing a resulting wave formed by the combination of a generally square carrier wave of a selected frequency and a modulating wave;
a wide band resonant circuit for circulating the resulting wave at the frequency of said carrier wave, the pilot circuit produces an output for controlling the electronic switch to regulate the amplitude of the resulting wave to avoid destruction of the tissue;
a regulator for modifying the rectified voltage of the pilot circuit wherein the resulting wave has an amplitude at the manipulator varied by means of said regulator such that the temperature of the tissue in which the coagulation takes place is in a range between about 50°
C. and about 75°
C., such temperature range resulting in denaturation of fibrinogen and its transformation into fibrin.
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Accused Products
Abstract
The invention relates to a method of regulating the power available at the manipulator of an electronic scalpel so as to make said manipulator adapted to be used to obtain blood clotting, said electronic scalpel being of the kind comprising: at least a mains voltage rectifying circuit supplying rectified and direct voltage to at least a radio frequency circuit adapted to emit as output a current carrier signal at a main frequency set by an oscillator, said current signal feeding said manipulator through a radio frequency transformer, wherein said method consists in applying to the manipulator a wave form resulting from the sum of the carrier wave and a modulating wave of such frequency that the energy transmitted to the tissue to be coagulated is such to raise the temperature of the tissue to be coagulated until denaturation of the fibrinogen contained therein is caused and transforming it into fibrin. The invention relates also to the electronic scalpel carrying out such a method
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Citations
10 Claims
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1. An electronic scalpel comprising:
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a manipulator having an electrode for cutting tissue and coagulation of blood; a rectifying circuit for supplying a rectified voltage and a direct voltage; a pilot circuit; a radio frequency circuit including an electronic switch fed by said rectified voltage and controlled by the pilot circuit for producing an output wave, said radio frequency circuit producing a resulting wave formed by the combination of a generally square carrier wave of a selected frequency and a modulating wave; a wide band resonant circuit for circulating the resulting wave at the frequency of said carrier wave, the pilot circuit produces an output for controlling the electronic switch to regulate the amplitude of the resulting wave to avoid destruction of the tissue; a regulator for modifying the rectified voltage of the pilot circuit wherein the resulting wave has an amplitude at the manipulator varied by means of said regulator such that the temperature of the tissue in which the coagulation takes place is in a range between about 50°
C. and about 75°
C., such temperature range resulting in denaturation of fibrinogen and its transformation into fibrin. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification