Abstract:
A generator includes a control device including a processor, and outputs electrical energy to a treatment instrument. The processor determines whether a treatment target has been heat-denatured prior to receiving an output command, and, based on determination, selects, as an operation state of the treatment instrument, one of a first mode if it is determined that the treatment target has not been heat-denatured and a second mode if it is determined that the treatment target has been heat-denatured. The processor operates the treatment instrument at the selected operation state by controlling the output of the electrical energy to the treatment instrument.
Abstract:
A control device controls a surgical instrument including a heater. The control device includes a first power supply, a second power supply, a resistance value calculation section, and an output control circuit. The first power supply outputs a first current having a first frequency and supplied to the heater. The second power supply outputs a second current combined with the first current, supplied to the heater and having a second frequency different from the first frequency. The resistance value calculation section separates a signal component related to the second current from the first and second currents having passed through the heater, and calculates a heater resistance value based on the signal component. The output control circuit controls a temperature of the heater based on the heater resistance value.
Abstract:
A living tissue bonding system includes a treatment instrument having a heating element which applies thermal energy to living tissue, an element temperature measuring section configured to measure an element temperature T1 of the heating element, a power source configured to generate power, a first calculating section configured to estimate a temperature difference ΔT between the element temperature T1 and a temperature T2 of the living tissue using a table or an equation stored beforehand in order to estimate the temperature difference ΔT based on an output value of the power source, a second calculating section configured to estimate the tissue temperature T2 from the element temperature T1 and the temperature difference ΔT estimated by the first calculating section, and a control section configured to control the power source based on the tissue temperature T2 estimated by the second calculating section.
Abstract:
A high-frequency generator for an electric surgical instrument that treats a living tissue includes a power supply that generates a power, and a resonant circuit that excites a high-frequency signal. The resonant circuit includes a parallel resonant circuit which is connected to the power supply, and a series resonant circuit which is coupled to the parallel resonant circuit and is connected to the electric surgical instrument. The parallel resonant circuit has a higher parallel resonant frequency than a series resonant frequency of the series resonant circuit.
Abstract:
A high-frequency control unit includes an integration value calculator calculating a measured integration value, which is a measured value of an integration value of an output high-frequency electric power from an output start time, with a passage of time. The high-frequency control unit includes a target locus setting section setting target locus which indicates, with a passage of time, a target integration value that is a target value of the integration value of the output high-frequency electric power from the output start time, and a controller comparing, with a passage of time, the measured integration value with the target locus, and controlling, with a passage of time, an output state of the high-frequency electric power based on a comparison result.
Abstract:
A control device includes: a power source configured to supply a high frequency power to a treatment instrument configured to treat a living tissue; a detecting circuit configured to sequentially detect a phase difference between a voltage and a current of the high frequency power supplied to the treatment instrument; and a processor configured to control operation of the power source, the processor being configured to sequentially calculate a variation of the phase difference detected by the detecting circuit, compare the calculated variation of the phase difference with a first threshold set for a variation of a phase difference, and perform reduction processing to reduce output of the high frequency power to be supplied to the treatment instrument when it is determined that the calculated variation of the phase difference is equal to or smaller than the first threshold.
Abstract:
A heating treatment apparatus to treat a living tissue by heating the living tissue includes a first holding member and a second holding member, a first heat generating element provided on the first holding member, a second heat generating element provided on the second holding member, a power supply unit supplying electric power to cause the first heat generating element and the second heat generating element to generate heat, and a control unit controlling operations of the power supply unit. The control unit switches a mode between a first mode and a second mode during treatment of the living tissue. Temperatures of the first heat generating element and the second heat generating element are controlled to the same temperature in the first mode and to different temperatures in the second mode.
Abstract:
An electrosurgical treatment system includes an output section that supplies a high-frequency output to a treatment instrument, a detecting section that detects a voltage and an electric current of the high-frequency output in the output section, a phase-difference detecting section that calculates a phase difference between the detected voltage and electric current, and a control section that switches, on the basis of a change in the phase difference, a first phase for drying a biological tissue by applying the high-frequency output to the biological tissue while increasing the voltage to a second phase for coapting the biological tissue by performing, with a set value of a voltage determined according to a voltage value of the high-frequency output at an end point in time of the first phase, constant voltage control.
Abstract:
A living tissue bonding system including: a sandwiching section for sandwiching living tissue; a power source for supplying to the living tissue treatment energy for bonding the living tissue sandwiched by the sandwiching section; a temperature measuring section for measuring a temperature of the living tissue sandwiched by the sandwiching section; a calculation section calculating, from the temperature of the living tissue measured by the temperature measuring section and a time period of applying the treatment energy, a time integral value of the temperature of the living tissue; a comparison section comparing the time integral value of the temperature of the living tissue calculated by the calculation section with a predetermined setting value; and an instruction section giving an instruction based on a result of the comparison by the comparison section.