Being the generator for electric surgical operation in order to impress

摘要

PROBLEM TO BE SOLVED: To provide performance which is improved in electric surgical blood vessel blockage and in tissue binding by reducing thermal propagation and charring. ;SOLUTION: A generator for electric surgical operation has an output power control system 10 or increasing and decreasing the impedance of a tissue 14 in a circulatory pattern until the tissue 14 is dried. Further, the output power is cyclically applied by the control system 10 having feed-back for the impedance of the tissue which obeys the circulatory pattern of the output power by several times, depending upon a condition of the tissue until the tissue is completely dried. Application of a high power causes the impedance of the tissue to reach a high value, and then, the power is reduced so as to allow the impedance to lower. Accordingly, this control system 10 is adaptive to the tissue in view of such a fact that the output power is tuned in response to an impedance of the tissue.;COPYRIGHT: (C)1998,JPO