SURGICAL NODE AND SYSTEM, AS WELL AS CIRCUIT OF DC VOLTAGE COMPENSATION Russian patent published in 2022 - IPC A61B18/12 A61B17/32 B03C3/38 

FIELD: medicine.

SUBSTANCE: group of inventions relates to medicine, namely to a surgical node, a surgical system made with the possibility of removing suspended particles at a site of surgical intervention during a surgical procedure, a method for signaling a surgical instrument, a circuit of DC voltage compensation for changing the output voltage of an DC generator supplied to a working part of a surgical instrument. The surgical node is made with the possibility of removing suspended particles at the site of surgical intervention during the surgical procedure. The node contains a switching node, a surgical instrument, and a controller. The switching node is made with the possibility of receiving the first signal and the second signal. The first signal is intended for use when generating an electric field proximally to a site of the surgical procedure to remove particles suspended proximally to the site of surgical intervention. The second signal is intended for use when dissecting, suturing or cauterizing patient’s tissue during the surgical procedure. The surgical instrument contains a working part of the instrument. The switching node is made with the possibility of switching the supply of the first signal and the second signal to the working part of the instrument. The controller is designed to control the switching node to control the supply of the first signal to the working part of the instrument during the first time interval and the supply of the second signal to the working part of the instrument during the second time interval. The controller contains a synchronization scheme. The synchronization scheme is made with the possibility of determining a time of the first signal supply to the working part of the instrument after the second interval in such a way that the first and the second intervals are non-overlapping intervals. In this case, the synchronization scheme is made with the possibility of synchronizing the supply of the first signal, depending on the termination of the second signal. The surgical system contains a surgical node, the first generator and the second generator. The first generator is designed to generate the first signal. The second generator is designed to generate the second signal. When implementing the method, the first signal is supplied during the first time interval, and the second signal is supplied to the working part of the instrument during the second time interval. The supply of the first signal to the working part of the instrument after the second interval is synchronized in such a way that the first and the second intervals are non-overlapping intervals. The circuit of DC voltage compensation for changing the output voltage of the AC generator supplied to the working part of the surgical instrument is designed to maintain a constant potential difference between a distal end of the working part of the instrument and patient’s tissue, regardless of the distance between the working part of the instrument and patient’s tissue. The circuit contains a resistor circuit, a processor. The resistor circuit is made with the possibility of electrical connection to an output of a DC generator. The processor is made with the possibility of receiving as an input signal the target voltage and a signal characterizing electric current passing through the resistor circuit. In this case, the processor is made with the possibility of processing this signal and increasing the output voltage coming from an electrosurgical generator by a value corresponding to a voltage drop on the resistor circuit.

EFFECT: due to the fact that a signal of the effect on tissue and a signal to remove particles suspended at the site of surgical intervention on the working part of the instrument are supplied in such a way that signal supply intervals are non-overlapping intervals, and synchronization of the first signal supply depending on the termination of the second signal, premature switching of the instrument between the first and the second signal is prevented, despite the fact that the envelope of the second signal is intermittent, by ensuring that the residual charge of the second signal is discharged or dissipated, while the instrument does not expose tissues to the destructive effect of a high current level during the smoke cleaning mode, which provides protection against unintentional thermal damage to tissue.

14 cl, 6 dwg