Patent ID: 7736358
Filing Date: 2010-06-15
Classification: A61B

Abstract:
1. An electrosurgical generator which supplies a high-frequency, high-voltage electrosurgical output signal to tissue to create an electrosurgical effect, the electrosurgical generator including a transformer having a primary winding and a secondary winding, the secondary winding conducting the electrosurgical output signal, the transformer inducing voltage and current signals between the primary and secondary windings that are distorted relative to one another due to inherent characteristics of the transformer at the high frequency and high-voltage of the electrosurgical output signal, the electrosurgical generator further comprising: a primary voltage sensor connected to the primary winding to supply a primary voltage sense signal related to the voltage across the primary winding; a primary current sensor connected to the primary winding to supply a primary current sense signal related to the current conducted through the primary winding; and a simulation circuit receptive of the primary voltage sense signal and the primary current sense signal, the simulation circuit executing a mathematical simulation algorithm to transform at least one of the primary voltage and current sense signals into at least one simulated signal which accurately represents an actual value of the voltage or current of the electrosurgical output signal conducted by the secondary winding of the transformer, the transformation of the one of the primary voltage and current sense signals by the simulation algorithm correcting the distortion introduced by the transformer.