Patent ID: 9039696
Filing Date: 2015-05-26
Classification: A61B

Abstract:
1. High-frequency surgical device for generating high-frequency energy for cutting and/or coagulating biological tissue, comprising an application part being electrically connectable to a surgical instrument having an activation switch, an intermediary power circuit being galvanically separated from the application part, a DC power source which, in operation, provides a positive and a negative DC voltage in the application part, a control signal generator being electrically connected to the DC voltage source, which generates in the application part, in operation, an alternating control signal with a predetermined switching frequency from the positive and negative DC voltage, and an evaluation unit that is electrically connected with the control signal generator, wherein the evaluation unit is electrically connectable to the activation switch of the instrument and transmits an activation signal that oscillates with the switching frequency into the intermediary power circuit when the activation switch is actuated. and wherein the evaluation unit comprises two signal transmitters being connected in parallel, wherein a first signal transmitter is activated only by a positive voltage and a second signal transmitter is only activated by a negative voltage, and which.