INSTRUMENT FOR COAGULATION AND DISSECTION OF BIOLOGICAL TISSUE AND METHOD OF OPERATION OF SUCH INSTRUMENT Russian patent published in 2023 - IPC A61B17/3209 A61B18/12 

FIELD: medical instruments.

SUBSTANCE: instrument for coagulation and dissection of biological tissue and a method for operating such an instrument. The instrument contains a working body and a working circuit. The working body has a cutting electrode and a first and a second coagulating electrodes. The working circuit has a cutting terminal, a first and a second coagulating terminals, a power connector, an analysing circuit, a switching device. The cutting terminal is connected to the cutting electrode. The first coagulating terminal is connected to the first coagulating electrode, the second coagulating terminal is connected to the second coagulating electrode. The supply voltage or supply current is provided via the power connector. The analysis connector provides an analysing signal with first half-waves of one polarity and with second half-waves of the other polarity. The analysing circuit is connected to the analysing connector and has a manually actuated first switch and a control element for generating a control signal. The analysing circuit is designed to analyse during one of the first half-waves whether the first switch has been actuated, and during one of the second half-waves to generate a control signal depending on the analysis. The switching device is connected to the power connector and to the cutting terminal, is controlled by a controlled signal, and is configured to switch between the first switching state and the second switching state. In embodiment of the method, an analysing signal is applied to the analysing connector with the first half-waves of one polarity and the second half-waves of another polarity. During one of the first half-waves, it is analysed whether the first switch is in a conductive or blocking state. Depending on the result of the analysis, a control signal for the switching device is generated during one of the second half-waves.

EFFECT: simplification of the instrument design by eliminating mechanical connection between the switching device and the analysing circuit and by using an oscillatory analysing signal.

14 cl, 15 dwg