Patent ID: 7713267
Filing Date: 2010-05-11
Classification: A61B

Abstract:
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.