High-frequency treatment device

Abstract

Provided is a high-frequency treatment device with which it is possible to stimulate the nerves of a patient, etc., while avoiding unexpected effects on the patient, etc. When, in stimulus mode, there is an operation to set a target current value and an output-starting operation through an operation unit 16 (input interface), a main control unit 141 causes an output unit 110 to start output of a nerve stimulus pulse signal and controls the current value of the nerve stimulus pulse signal to match the target current value. When there is an output-stopping operation through the operation unit 16, the main control unit 141 causes the output unit 110 to stop outputting the nerve stimulus pulse signal. During the period in which the nerve stimulus pulse signal is being outputted by the output unit 110, the target current value is prevented from being changed through the operation unit 16.

Description

High-frequency treatment device

[0001] The present invention relates to a high-frequency treatment device having a function of applying a nerve stimulation pulse signal to a treatment target such as a human being or an animal.

[0002] Conventionally, in the medical field, nerve stimulation pulse signals are output from electrodes placed inside the body of a patient (human or other animal) to perform a procedure to stimulate the nerves of the patient (see, for example, Patent Document 1).

[0003] Special table 2017-093865 publication

[0004] However, if the current value of a nerve stimulation pulse signal is arbitrarily changed while the signal is being output from an electrode placed inside the body of a patient, etc., it may have an unexpected effect on the patient, etc.

[0005] Therefore, an object of the present invention is to provide a high-frequency treatment device that can stimulate the nerves of a patient or the like while avoiding unexpected effects on the patient or the like.

[0006] The high-frequency treatment device according to the present invention comprises: a plurality of electrode connection terminals; an output unit that outputs a nerve stimulation pulse signal in a stimulation mode and outputs a high-frequency signal in a coagulation mode between a plurality of electrodes connected to each of the plurality of electrode connection terminals; an input interface that is capable of switching between the stimulation mode and the coagulation mode, setting a target current value, and starting and stopping output; and a control unit that, when the target current value setting operation and the output start operation are performed through the input interface in the stimulation mode, causes the output unit to start outputting the nerve stimulation pulse signal and controls the current value of the nerve stimulation pulse signal to match the target current value, while when the output stop operation is performed through the input interface, causes the output unit to stop outputting the nerve stimulation pulse signal; and during the period when the nerve stimulation pulse signal is being output by the output unit, changing the target current value through the input interface is prohibited.

[0007] The present invention relates to a high-frequency treatment device having an impedance measuring function, ...

[0008] (Configuration) The high-frequency treatment device 1 according to one embodiment of the present invention shown in Figure 1 is a device for performing nerve block by stimulating nerves with nerve stimulation pulse signals and partially heating peripheral nerves with high-frequency signals. The nerve block method may be either high-frequency thermocoagulation or pulsed high-frequency coagulation. "High-frequency thermocoagulation" is a method in which a portion of nerve tissue is heated to a temperature of approximately 80°C for several minutes using a high-frequency current flowing from an electrode, causing thermal coagulation, thereby blocking pain signals. "Pulsed high-frequency coagulation" is a method in which a portion of nerve tissue is heated to a temperature of 42°C or less for several minutes by intermittently passing a high-frequency current through the tissue, blocking pain signals without damaging the nerve.

[0009] 1, the high-frequency treatment device 1 includes a main body 10 (housing or casing), a main electrode 21 connected to the main body 10, and a return electrode 22 (electrode) connected to the main body 10. The main electrode 21 and / or the return electrode 22 do not need to be components of the high-frequency treatment device 1 (or may be additional components).

[0010] The main body 10 houses or supports the components described below. A main electrode connector T1 to which the main electrode 21 is electrically connected and a return electrode connector T0 to which the return electrode 22 is electrically connected are provided at the lower front portion of the main body 10.

[0011] A touch panel and / or press-type operation unit 16 (constituting the "input interface" of the present invention) is provided on the upper front surface of the main body 10. The operation unit 16 comprises a touch panel display 160 that accepts input operations such as various settings and displays various information, an ON button S11 that accepts an output start operation (treatment start operation), an OFF button S12 that accepts an output stop operation (treatment end operation), a control knob S14 for adjusting and setting the output power (e.g., current), a stimulation mode key S21, a coagulation mode key S22, and an impedance measurement key S24. The control knob S14 can be used to adjust or set the target current value of the nerve stimulation pulse signal in 0.5 mA increments, for example. The operation unit 16 can also be used to set the target voltage of the high-frequency voltage applied between the main electrode 21 and the return electrode 22.

[0012] After the target output (target current value and / or target voltage value) is set, in addition to the operation of the ON button S11, the rotation of the control knob S14 may be accepted as an output start operation (treatment start operation). In the unlikely event that the ON button S11 (auto-start key) malfunctions, treatment can be continued by the output start operation function of the control knob S14, even if the patient's craniotomy has already begun. In addition, a software protection function is added to the main controller 141 and / or sub-controller 142 so that the current value will not exceed the set value no matter how much the control knob S14 is turned.

[0013] When the stimulation mode key S21 is pressed, the high-frequency treatment device 1 is switched to the "stimulation mode" and is in a state where a nerve stimulation pulse signal can be output from the main electrode 21. When the coagulation mode key S22 is pressed, the high-frequency treatment device 1 is switched to the "coagulation mode" and is in a state where a high-frequency signal can be output from the main electrode 21. When the impedance measurement key S24 is pressed, the high-frequency treatment device 1 is switched to the "impedance measurement mode" and is in a state where the impedance between the main electrode 21 and the return electrode 22 is measured.

[0014] In addition to the stimulation mode key S21, the coagulation mode key S22, and the impedance measurement key S24, a "menu key" may be provided. When the menu key is pressed, a menu screen is displayed on the touch panel display 160, allowing the user to check the electrical continuity (disconnection) of the main electrode 21 and / or the return electrode 22, set the type and volume of the buzzer sound output from a sound output device such as a speaker (not shown), and set the screen brightness. When the menu key is pressed after switching between the stimulation mode and the coagulation mode, the display screen on the touch panel display 160 can be switched to the menu screen.

[0015] A handle 17 is provided on the top of the main body 10 for carrying the main body 10. A power connector and a power switch (not shown) are provided on the back of the main body 10 for connecting to a commercial AC power source to receive power.

[0016] The main electrode 21 is configured to be inserted into a human body or the like and to apply a nerve stimulation pulse signal and a high-frequency signal to the human body. In this embodiment, the main electrode 21 is configured in a generally cylindrical needle shape that can be inserted into the human body or the like. In another embodiment, the main electrode 21 is configured in a needle tube shape that can be inserted into the human body or the like and that allows a drug or the like to be injected into the human body or the like via the lumen of the main electrode 21. Most of the main electrode 21, except for a non-insulated portion 211 at the tip, is an insulating portion 212 that is insulatingly coated, and the nerve stimulation pulse signal and the high-frequency signal are each output from the non-insulated portion 211.

[0017] The main electrode 21 is provided with a thermocouple 213 for measuring the treatment temperature at the tip of the lumen or internal space of the main electrode 21. The main electrode 21 may have a shape other than that described above, such as a rod-like shape that can be inserted into a needle tube or a catheter. The thermocouple 213 may also be provided separately from the main electrode 21.

[0018] The return electrode 22 is a flat electrode that is attached to the skin surface of a human body or the like that is the treatment target, and is used to pass nerve stimulation pulse signals and high-frequency signals between it and the main electrode 21 that is inserted into the human body or the like. That is, the return electrode 22 is used when passing a so-called monopolar high-frequency current. The return electrode 22 is electrically connected to the main body 10 via the return electrode cable 20 and the return electrode connector T0. Note that, although the return electrode 22 is configured as a rectangular flat plate in this embodiment, the return electrode 22 may have other shapes.

[0019] 2, the high-frequency treatment device 1 includes, as functional elements, an output section 110, a voltage / current measuring section 112, a temperature measuring section 120, a reference voltage generating section 121, a temperature comparing section 122, a main control section 141, and a sub-control section 142. The main control section 141 and / or the sub-control section 142 constitute the "control section" in the present invention.

[0020] The output unit 110 is configured to generate high-frequency power (primary high-frequency power signal) having a preset frequency (e.g., 470 to 490 kHz) based on power supplied from a commercial AC power source and a voltage based on an output control signal transmitted from the main control unit 141, and to output the generated pulsed high-frequency power by turning the primary high-frequency power ON / OFF based on a pulse signal (pulse width wp, pulse period Tp) from the main control unit 141. The output unit 110 is also configured to generate continuous high-frequency power when the pulse signal from the main control unit 141 is always ON.

[0021] The output unit 110 is connected to the main electrode connector T1 and the return electrode connector T0, and is thus connected so as to be able to output a nerve stimulation signal and a high-frequency signal to the main electrode 21 and the return electrode 22. The output unit 110 is composed of a known circuit having a transformer, which insulates the human body or other target of treatment from the commercial AC power supply.

[0022] The voltage / current measuring unit 112 is composed of known circuits and the like, and is configured to measure the high-frequency current and voltage output from the output unit 110. The voltage / current measuring unit 112 is configured to generate a voltage measurement signal corresponding to the high-frequency voltage generated by the output unit 110 and a current measurement signal corresponding to the high-frequency current, and transmit these to the main control unit 141.

[0023] The temperature measurement unit 120 is composed of known circuits, etc., and is configured to generate a temperature measurement signal (e.g., 25 mV / °C) based on the signal received from the thermocouple 213 and transmit it to each of the main control unit 141 and the temperature comparison unit 122.

[0024] The reference voltage generating unit 121 is composed of known circuits, etc., and is configured to receive the target temperature transmitted from the main control unit 141, generate a reference voltage corresponding to the target temperature, and then transmit it to the temperature comparison unit 122.

[0025] The temperature comparison unit 122 is composed of known circuits, etc., and is configured to receive the reference voltage transmitted from the reference voltage generation unit 121 and the measured temperature signal transmitted from the temperature measurement unit 120, compare the target temperature corresponding to the reference voltage with the measured temperature corresponding to the measured temperature signal, and transmit the temperature comparison result (differential voltage signal) to the main control unit 141 and / or the sub-control unit 142.

[0026] The main control unit 141 is composed of a processing element such as a CPU, storage elements such as a ROM and / or RAM, an I / O circuit, etc. The main control unit 141 is configured to control the operation of the components of the high-frequency treatment device 1, such as the operation unit 16 and the output unit 110, to perform high-frequency treatment. The main control unit 141 measures voltage, current, power, and impedance based on the voltage measurement signal and current measurement signal received from the voltage / current measurement unit 112, and displays the measured values ​​on the touch panel display 160 along with the measured temperature. When a target voltage is set via the operation unit 16, the main control unit 141 is configured to control the high-frequency power output from the output unit 110 to match the measured voltage corresponding to the voltage measurement signal received from the voltage / current measurement unit 112 with the target voltage.

[0027] Similar to the main control unit 141, the sub-control unit 142 is configured with a processing element such as a CPU, storage elements such as ROM and / or RAM, and an I / O circuit. The sub-control unit 142 may be configured with a known PWM (Pulse Width Modulation) circuit or the like instead of a microcomputer. The sub-control unit 142 compares the temperature comparison result (differential voltage signal) sent from the temperature comparison unit 122 with the sawtooth wave signal to generate a pulse signal and send it to the output unit 110.

[0028] The voltage / current measuring unit 112, temperature measuring unit 120, reference voltage generating unit 121, temperature comparing unit 122 and sub-controller 142 are insulated from the commercial AC power supply to protect the human body or the like being treated.

[0029] (Function) According to the high-frequency treatment device 1 having the above-described configuration, the main control section 141 (or the main control section 141 and the sub-control section 142) executes the following processing.

[0030] First, it is determined whether the stimulation mode key S21 has been operated (FIG. 3 / STEP 110). If it is determined that the stimulation mode key S21 has been operated (FIG. 3 / STEP 110...YES), it is determined whether a target current value has been set via the touch panel display 160 and / or the control knob S14 (FIG. 3 / STEP 111). If it is determined that a target current value has not been set (FIG. 3 / STEP 111...NO), it is determined whether the elapsed time t1 since the stimulation mode key S21 was operated is equal to or greater than the first specified time t 1th It is determined whether the elapsed time t1 is equal to or greater than the first designated time t 1th If it is determined that the elapsed time t1 is less than the first specified time t2 (FIG. 3 / STEP 112...NO), the process of determining whether or not the target current value has been set is repeated (FIG. 3 / STEP 111). 1th If it is determined that the time t1 is equal to or greater than the first specified time t2 (FIG. 3 / STEP 112 . . . YES), it is again determined whether the stimulation mode key S21 has been operated (FIG. 3 / STEP 110). 1thThe process of determining whether the target current value has been set (FIG. 3 / STEP 112) may be omitted, and the process of determining whether the target current value has been set (FIG. 3 / STEP 111) may be repeated until it is determined that the target current value has been set (FIG. 3 / STEP 111...YES).

[0031] If it is determined that the target current value has been set (FIG. 3 / STEP 111...YES), it is determined whether or not the ON button S11 has been operated (whether or not an output start operation has been performed) (FIG. 3 / STEP 113). The target current value is output to the touch panel display 160. If it is determined that the ON button S11 has not been operated (FIG. 3 / STEP 113...NO), the elapsed time t2 since the target current value was set is equal to or shorter than the second specified time t 2th It is determined whether the first specified time t 1th and the second specified time t 2th may be the same, or one may be set longer than the other.

[0032] The elapsed time t2 is the second specified time t 2th If it is determined that the elapsed time t2 is less than the second specified time t2 (FIG. 3 / STEP 114...NO), the process of determining whether the ON button S11 has been operated or not is repeated (FIG. 3 / STEP 113). 2th If it is determined that the target current value is equal to or greater than the second specified time t (FIG. 3 / STEP 114 . . . YES), it is again determined whether the stimulation mode key S21 has been operated (FIG. 3 / STEP 110). 2th The process of determining whether or not the above has occurred (FIG. 3 / STEP 114) may be omitted, and the process of determining whether or not the ON button S11 has been operated may be repeated (FIG. 3 / STEP 113) until it is determined that the ON button S11 has been operated (FIG. 3 / STEP 113...YES).

[0033] If it is determined that the ON button S11 has been operated (FIG. 3 / STEP 113...YES), a nerve stimulation pulse signal is output from the main electrode 21 via the output unit 110 (FIG. 3 / STEP 115). In addition to if it is determined that the ON button S11 has been operated, if it is determined that the control knob S14 has been turned, a nerve stimulation pulse signal may be output from the main electrode 21 via the output unit 110. The output current value measured by the voltage / current measuring unit 112 and flowing between the main electrode 21 and the return electrode 20 is controlled so that it matches the target current value (or the error from the target current value is below a threshold) (FIG. 3 / STEP 116). At this time, even if the touch panel display 160 and / or the control knob S14 are operated, changing the target current value is prohibited.

[0034] In this embodiment, the target current value is determined in response to the operation of the ON button S11, but in other embodiments, the target current value may be determined in response to other operations, such as touching a button or key displayed on the touch panel display 160, or the target current value may be determined in response to a certain amount of time having passed since the target current value was last set.

[0035] Next, it is determined whether OFF button S12 has been operated (whether or not an output stop operation has been performed) (FIG. 3 / STEP 117). If it is determined that OFF button S12 has not been operated (FIG. 3 / STEP 117...NO), the nerve stimulation pulse signal continues to be output from main electrode 21 via output unit 110 (FIG. 3 / STEP 115). On the other hand, if it is determined that OFF button S12 has been operated (FIG. 3 / STEP 117...YES), the output of the nerve stimulation pulse signal from main electrode 21 via output unit 110 is stopped (FIG. 3 / STEP 118).

[0036] If it is determined that the stimulation mode key S21 has not been operated (FIG. 3 / STEP 110...NO), it is determined whether or not the coagulation mode key S22 has been operated (FIG. 4 / STEP 120). If it is determined that the coagulation mode key S22 has been operated (FIG. 4 / STEP 120...YES), it is determined whether or not a target temperature has been set via the touch panel display 160 and / or the control knob S14 (FIG. 4 / STEP 121). If it is determined that a target temperature has not been set (FIG. 4 / STEP 121...NO), it is determined whether or not the elapsed time t3 since the coagulation mode key S22 was operated is equal to or greater than the third specified time t 3th It is determined whether the elapsed time t3 is equal to or greater than the third specified time t 3th If it is determined that the elapsed time t3 is less than the third specified time t4 (FIG. 4 / STEP 122...NO), the process of determining whether the target voltage has been set or not is repeated (FIG. 4 / STEP 121). 3th If it is determined that the time t3 is equal to or greater than the third specified time t4 (FIG. 4 / STEP 122...YES), it is again determined whether the stimulation mode key S21 has been operated (FIG. 3 / STEP 110). 3th The process of determining whether the target temperature has been set (FIG. 4 / STEP 122) may be omitted, and the process of determining whether the target temperature has been set (FIG. 4 / STEP 121...YES) may be repeated until it is determined that the target temperature has been set (FIG. 4 / STEP 121...YES).

[0037] If it is determined that the target temperature has been set (FIG. 4 / STEP 121...YES), it is determined whether the ON button S11 has been operated (FIG. 4 / STEP 123). If it is determined that the ON button S11 has not been operated (FIG. 4 / STEP 123...NO), the elapsed time t4 since the target temperature was set is equal to or less than the fourth specified time t 4th It is determined whether the third specified time t 3th and a fourth designated time t 4th The first specified time t may be the same, or one of them may be set longer than the other. 1th , the second specified time t 2th , the third designated time t3th and a fourth designated time t 4th may be the same or may be set to be different from each other.

[0038] The elapsed time t4 is the fourth specified time t 4th If it is determined that the elapsed time t4 is less than the fourth specified time t4 (FIG. 4 / STEP 124...NO), the process of determining whether the ON button S11 has been operated or not is repeated (FIG. 4 / STEP 123). 4th If it is determined that the time is equal to or greater than the fourth specified time t (FIG. 4 / STEP 124 . . . YES), it is again determined whether the stimulation mode key S21 has been operated (FIG. 4 / STEP 120). 4th The process of determining whether or not the ON button S11 has been operated (FIG. 4 / STEP 124) may be omitted, and the process of determining whether or not the ON button S11 has been operated (FIG. 4 / STEP 123...YES) may be repeated until it is determined that the ON button S11 has been operated (FIG. 4 / STEP 123...YES).

[0039] If it is determined that the ON button S11 has been operated (FIG. 4 / STEP 123...YES), a high-frequency signal (or a high-frequency pulse signal) is output from the main electrode 21 via the output unit 110 (FIG. 4 / STEP 125). In addition to if it is determined that the ON button S11 has been operated, if it is determined that the control knob S14 has been turned, a high-frequency signal (or a high-frequency pulse signal) may be output from the main electrode 21 via the output unit 110. The output voltage and / or output current value is controlled so that the temperature of the main electrode 21 measured via the temperature measurement unit 120 matches the target temperature (or the error from the target temperature is equal to or less than a threshold) (FIG. 4 / STEP 126).

[0040] In the coagulation mode, the output voltage is controlled based on the measured temperature, thereby stabilizing the temperature of the main electrode 21 or its surroundings at or near the set temperature. In addition to controlling the output voltage using a single measured temperature, a moving average (16 times) of the measured temperature is used for the temperature graph displayed on the touch panel display 160, which shows the measured temperature and its change over time. Even if the output voltage is constant during temperature measurement, some variation occurs between individual measurements due to noise and other factors. Therefore, if each measurement result is displayed on the touch panel display 160, the temperature value may fluctuate frequently, potentially causing anxiety for the user. Therefore, the measured temperature is averaged to stabilize the value and provide a sense of security to the user. By using a 16-time moving average, the influence of noise is reduced by approximately one-quarter.

[0041] In this embodiment, the target temperature is determined in response to the operation of the ON button S11, but in other embodiments, the target temperature may be determined in response to other operations, such as touching a button or key displayed on the touch panel display 160, or the target temperature may be determined in response to a certain amount of time having passed since the target temperature was last set.

[0042] Next, it is determined whether the OFF button S12 has been operated ( FIG. 4 / STEP 127). If it is determined that the OFF button S12 has not been operated ( FIG. 4 / STEP 127 . . . NO), the high-frequency signal continues to be output from the main electrode 21 via the output unit 110 ( FIG. 4 / STEP 125). On the other hand, if it is determined that the OFF button S12 has been operated ( FIG. 4 / STEP 127 . . . YES), the output of the high-frequency signal from the main electrode 21 via the output unit 110 is stopped ( FIG. 4 / STEP 128). The output of the high-frequency signal may be stopped not when the OFF button S12 is operated, but when the cumulative output time of the high-frequency signal (which may be, for example, starting from the time when the measured temperature reaches the target temperature) has reached a predetermined time, or when the cumulative number of outputs of the high-frequency pulse signal (which may be, for example, the cumulative number of outputs after the measured temperature reaches the target temperature) has reached a predetermined number.

[0043] If it is determined that the coagulation mode key S22 has not been operated (FIG. 4 / STEP 120...NO), it is then determined whether the impedance measurement key S24 has been operated (FIG. 5 / STEP 140). If it is determined that the impedance measurement key S24 has been operated (FIG. 5 / STEP 140...YES), the voltage / current measurement unit 112 measures the impedance between the main electrode 21 and the return electrode 20 (FIG. 5 / STEP 141). The impedance measurement result is then output to the touch panel display 160 (FIG. 5 / STEP 142). It is then determined whether the impedance measurement key S24 or the OFF button S12 has been operated (FIG. 5 / STEP 143). If it is determined that the impedance measurement key S24 or the OFF button S12 has not been operated (FIG. 5 / STEP 143...NO), the process of measuring the impedance between the main electrode 21 and the return electrode 20 is repeated (FIG. 5 / STEP 141).

[0044] If it is determined that the impedance measurement key S24 or the OFF button S12 has been operated (FIG. 5 / STEP 143...YES), the series of processes ends. If it is determined that the impedance measurement key S24 has not been operated (FIG. 5 / STEP 140...NO), the series of processes ends. Then, the process of determining whether or not the stimulation mode key S21 has been operated (FIG. 3 / STEP 110) and subsequent processes are repeated.

[0045] (Another embodiment of the present invention) In the above embodiment, the high-frequency treatment device 1 has a single main electrode connector T1 corresponding to a single main electrode, but the high-frequency treatment device 1 may have two or more electrode connectors corresponding to two or more electrodes (excluding the return electrode plate 20).

[0046] After the output of the high-frequency signal from the main electrode 21 via the output unit 110 is stopped (see FIG. 4 / STEP 128), the main control unit 141 determines whether the temperature measurement signal received from the temperature measurement unit 120 indicates that the temperature of the main electrode 21 or its surroundings has fallen below a predetermined temperature (e.g., 38° C.), and if the determination result is affirmative, a beep may be output from the sound output device. Instead of or in addition to the beep, a specified image (e.g., a message) may be displayed on the touch panel display 160.

[0047] The beep and / or message can inform the operator when it is time to remove the main electrode 21 from the patient's body, taking into account the temperature of the main electrode 21 or its surroundings.

[0048] A designated output time of the high-frequency signal in the coagulation mode may be set through the operation unit 16, and while the high-frequency signal is being output from the main electrode 21 by the main control unit 141, a timer may count down from the designated output time, and when the remaining cauterization time reaches 0 as a result of the countdown (when the cumulative output time of the high-frequency signal reaches the designated output time), the output of the high-frequency signal may be automatically stopped. A temperature graph showing the change over time in the temperature of the main electrode 21 or its surroundings may be successively updated and displayed on the touch panel display 160 by the main control unit 141.

[0049] In the coagulation mode of the high-frequency treatment device 1, if the OFF button S12 (or the stop key) is operated once while a high-frequency signal is being output from the main electrode 21, the main control unit 141 may temporarily stop the output of the high-frequency signal from the main electrode 21 without resetting the remaining cauterization time for output of the high-frequency signal to 0. At this time, the temperature graph displayed on the touch panel display 160 may be continuously updated. If the ON button S11 (or the auto-start key) is then operated, the main control unit 141 resumes output of the high-frequency signal from the main electrode 21, and the output of the high-frequency signal continues until the remaining cauterization time reaches 0. If the OFF button S12 (or the stop key) is operated again while the output of the high-frequency signal is temporarily stopped, the main control unit 141 resets the remaining time and the temperature graph displayed on the touch panel display 160 is also stopped from being updated, resulting in a complete stop state.

[0050] If the output of the high-frequency signal needs to be stopped for some reason, the timer will be reset if the output is completely stopped. The operator must then reset the timer to the original remaining cauterization time and resume the output of the high-frequency signal. However, the pause function allows the operator to selectively stop and resume the output of the high-frequency signal without resetting the timer.

[0051] 1. High frequency treatment device 16. Operation unit (input interface) 20. Return electrode (electrode) 21. Main electrode 110. Output unit 112. Voltage / current measuring unit 120. Temperature measuring unit 121. Reference voltage generating unit 122. Temperature comparing unit 141. Main control unit 142. Sub-control unit.

Claims

1. A plurality of electrode connection terminals; An output unit that outputs a nerve stimulation pulse signal in a stimulation mode and outputs a high-frequency signal in a coagulation mode between a plurality of electrodes connected to each of the plurality of electrode connection terminals; an input interface having, as separate operators, a switching operator for switching between the stimulation mode and the coagulation mode, a setting operator for setting a target current value, an ON operator for starting output, and an OFF operator for stopping output; a control unit that, when a setting operation of the target current value is performed through the setting operation unit in the stimulation mode and an output start operation is performed through the ON operation unit, starts output of the nerve stimulation pulse signal from the output unit and controls the current value of the nerve stimulation pulse signal to match the target current value, and when an output stop operation is performed through the OFF operation unit, stops output of the nerve stimulation pulse signal from the output unit; In the stimulation mode, during a period from when an output start operation is performed through the ON operation button to when an output stop operation is performed through the OFF operation button, changing of the target current value through the input interface is prohibited. High frequency treatment device.

2. The high-frequency treatment device according to claim 1, The input interface allows an impedance measurement start operation and an impedance measurement stop operation, When an impedance measurement start operation is performed through the input interface, the control unit flows a current between the plurality of electrodes to start impedance measurement between the electrodes, and when an impedance measurement stop operation is performed through the input interface, the control unit stops the current flowing between the plurality of electrodes to stop impedance measurement between the electrodes. High frequency treatment device.

3. The high-frequency treatment device according to claim 1, When the temperature of at least one of the electrodes or the surroundings of the electrodes becomes equal to or lower than a predetermined temperature in at least one of the cases where the output of the high-frequency signal in the coagulation mode is stopped, the fact is notified audibly or visually. High frequency treatment device.

4. The high-frequency treatment device according to claim 1, A designated output time of the high-frequency signal in the coagulation mode is set through the input interface; When the accumulated output time of the high frequency signal reaches the designated output time, the output of the high frequency signal is automatically stopped. When the output of the high-frequency signal is stopped before the accumulated output time of the high-frequency signal reaches the specified output time, the accumulated output time of the high-frequency signal up to that point is stored, and when the output of the high-frequency signal is resumed thereafter, the accumulated output time of the high-frequency signal is added to the stored accumulated output time. High frequency treatment device.

5. The high-frequency treatment device according to claim 4, When the output of the high frequency signal is stopped before the accumulated output time of the high frequency signal reaches the designated output time, and a stop command is issued, the accumulated output time of the high frequency signal up to that point is reset to 0. High frequency treatment device.

6. The high-frequency treatment device according to claim 1, The plurality of electrodes is further provided. High frequency treatment device.