| 摘要 |
An electrosurgical apparatus comprises a high frequency generator ( 1 ) with an associated power control system, a handpiece ( 2 ) with means for removably mounting an electrode ( 5 ) therein, and a connection cable ( 3 ) between an output ( 4 ) of the generator and the handpiece. The transfer characteristic of the system provides a substantially true ohmic transfer of loads on the electrode side of the connection cable ( 3 ) to the generator side thereof at or around a predetermined load on the electrode. In order to achieve a fully automatic and optimalized control af power supplied from a cutting electrode, whereby the control is instantly responding, to changes in the electrode load, the electrosurgical apparatus is characterized in that the power control system comprises a driver stage ( 7 ) followed by a reflectormeter ( 9 ) adapted and arranged to sense the generator output ( 4 ). A detector ( 10 ) supplies a detector signal which represents the reflected signal on the output ( 4 ), and the detector signal is communicated to the driver stage ( 7 ) for controlling the gain thereof.
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