High-frequency treatment device

Abstract

Provided are a high-frequency treatment device and a high-frequency treatment method capable of reducing pain which a patient subjected to treatment might feel during the treatment. [Solution] A high-frequency treatment device 1 comprises: output units 41, 42 that output high-frequency power; a plurality of electrodes 21-24 connected to the output units 41, 42 and disposed on a subject to be treated; temperature measurement units 21c-24c, 61, 62 that measure the temperature around the electrodes 21-24; and a control unit 80 that performs a normal output control for controlling the output units 41, 42 such that the temperature measured by the temperature measurement units 21c-24c, 61, 62 becomes equal to a control target value; and an operation detection unit 30 that detects an operation performed by the subject to be treated. The control unit 80 performs an output reduction control so that the outputs of the output units 41, 42 are reduced as compared with the normal output control, on the basis of the detection by the operation detection unit of an operation performed by the subject to be treated.

Description

Technical Field

[0001] The present invention relates to a high-frequency treatment device and a high-frequency treatment method for applying a high-frequency current to a treatment target such as a human or an animal to perform treatments such as thermocoagulation of nerve tissue and ablation of tumor tissue.

Background Art

[0002] Conventionally, in the medical field, high-frequency treatment is widely used in which an electrode is placed inside a human, an animal, or the like, and a high-frequency current is passed through this electrode to perform ablation of tissue or the like. In recent years, as one of the pain treatments, a method of performing nerve block by high-frequency treatment has attracted attention (see, for example, Patent Document 1). Nerve block by high-frequency treatment has the advantages of less side effects on surrounding tissues and a long-lasting effect compared to the conventional method using drugs.

[0003] There are two types of nerve block by this high-frequency treatment: the high-frequency thermocoagulation method and the pulsed high-frequency method. Among them, the high-frequency thermocoagulation method heats a part of the nerve tissue at a temperature of about 80°C for several minutes by the high-frequency current flowing from the electrode to cause thermocoagulation, thereby blocking the pain signal. In addition, the pulsed high-frequency method intermittently passes a high-frequency current through a part of the nerve tissue to heat it at a temperature of 42°C or lower for ten-odd minutes to block the pain signal without damaging the nerve.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] In the high-frequency thermal coagulation method, since nerve tissue is heated at a high temperature of about 80°C, the patient to be treated will feel pain due to the heating of the nerve tissue. Therefore, before starting the high-frequency treatment, a local anesthetic is injected into the site where the high-frequency treatment is to be performed to prevent the patient from feeling pain caused by heating. However, depending on the patient's constitution and the site where the high-frequency treatment is performed, the temperature of the nerve tissue may rise before the anesthesia takes effect, and the patient may feel pain during the high-frequency treatment.

[0006] In view of such circumstances, the present invention aims to provide a high-frequency treatment device and a high-frequency treatment method capable of reducing the pain felt by a patient to be treated during the treatment.

Means for Solving the Problems

[0007] The high-frequency treatment device according to the present invention includes an output unit that outputs high-frequency power, a plurality of electrodes connected to the output unit and arranged on the treatment target, a temperature measurement unit that measures the temperature around the electrodes, a control unit that performs normal output control to control the output of the output unit so that the measured temperature value measured by the temperature measurement unit becomes equal to the control target value, and an operation detection unit that detects an operation of the treatment target. The control unit is characterized in that, based on the operation detection unit detecting an operation of the treatment target, the control unit performs output reduction control to reduce the output of the output unit more than the normal output control.

[0008] In addition, the high-frequency treatment method according to the present invention is a high-frequency treatment method in which high-frequency power is output to a plurality of electrodes arranged on a treatment target to perform treatment. In the method, normal output control is performed to control the output of the high-frequency power so that the measured temperature value around the electrodes becomes equal to the control target value, and output reduction control is performed to reduce the output of the high-frequency power more than the normal output control based on the operation of the treatment target.

[0009] According to the present invention, when a patient to be treated feels pain due to heating, it is possible to reduce the output of the high-frequency power by the patient's own operation, so that the pain felt by the patient during the treatment can be reduced.

[0010] In the present invention, it is preferable that the control unit performs the output reduction control only while the operation detection unit detects an operation on the treatment target.

[0011] According to this, when the patient who is the treatment target releases the operation, it is possible to return from the output reduction control to the normal output control. As a result, since the patient himself / herself can determine the timing to return the output of the high-frequency power to the normal output, it is possible to more effectively reduce the pain felt by the patient.

[0012] In the present invention, it is also preferable that the control unit performs the output reduction control for a predetermined period based on the fact that the operation detection unit has detected an operation on the treatment target.

[0013] According to this, even when it is difficult for the patient who is the treatment target to continue the operation when feeling pain, it is possible to perform the output reduction control for a predetermined period, so that the pain felt by the patient can be more effectively reduced.

[0014] In the present invention, it is preferable that the control unit performs the normal output control even if the operation detection unit detects an operation on the treatment target when the measured temperature value is equal to or lower than a preset temperature reference value.

[0015] According to this, it is possible to prevent the temperature around the electrode from decreasing significantly while performing the output reduction control due to the pain felt by the patient who is the treatment target. As a result, after returning to the normal output control, it is possible to shorten the time required for the temperature around the electrode to rise to the temperature required for the treatment, so that the treatment can be made more efficient.

[0016] In the present invention, in the normal output control, the control unit preferably sets the control target value to a first target value and controls the output of the output unit so that the temperature measurement value becomes equal to the control target value. In the output reduction control, the control unit preferably sets the control target value to a second target value lower than the first target value and controls the output of the output unit so that the temperature measurement value becomes equal to the control target value.

[0017] According to this, since it is possible to perform normal output control and output reduction control with one control algorithm, it is possible to prevent the control algorithm from becoming complicated. Further, it is possible to prevent the occurrence of bugs due to a complicated control algorithm and the high cost of the device configuration.

[0018] In the present invention, in the output reduction control, the control unit preferably sets the control target value to a temperature lower than the current temperature measurement value.

[0019] According to this, regardless of the temperature at the time when the operation of the patient to be treated is detected, it is possible to surely reduce the output of the high-frequency power, so that it is possible to surely reduce the pain felt by the patient.

[0020] In the present invention, the operation detection unit is preferably configured to change a first voltage value and a second voltage value input to the control unit when receiving an operation of the treatment target, and the control unit determines whether the operation detection unit has detected an operation of the treatment target based on changes in the first voltage value and the second voltage value.

[0021] According to this, by comparing the first voltage value and the second voltage value, it is possible to detect a failure in the operation detection unit or the like, so that the safety can be improved and the problems associated with false detection of the operation detection unit can be prevented.

Advantages of the Invention

[0022] According to the high-frequency treatment device and the high-frequency treatment method of the present invention, it is possible to achieve an excellent effect of reducing the pain felt by a patient who is the treatment target during the treatment.

Brief Description of the Drawings

[0023]

Figure 1

Figure 2

Figure 3

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Figure 5

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Figure 8

Figure 9

Modes for Carrying Out the Invention

[0024] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

[0025] FIG. 1 is a schematic diagram showing the appearance of a high-frequency treatment device 1 according to a first embodiment of the present invention. The high-frequency treatment device 1 of the present embodiment is for performing nerve block by partially heating peripheral nerves with a high-frequency current. As shown in the figure, the high-frequency treatment device 1 includes a main body 10, four electrodes 21, 22, 23, and 24 connected to the main body 10, a counter electrode plate 25 connected to the main body 10, and an operation switch 30 connected to the main body 10.

[0026] The main body 10 houses or supports the internal configuration described later. On the front surface of the main body 10, four electrode connectors 11 to 14 to which the respective electrodes 21 to 24 are connected and a counter electrode plate connector 15 to which the counter electrode plate 25 is connected are provided at the lower part. An operation unit 16 for receiving the operation of the user is also provided on the front surface of the main body 10. The operation unit 16 includes a touch panel display 16a for receiving input operations such as various settings and displaying various information, a button 16b for receiving start and end operations of the treatment, and a control knob 16c for adjusting the output power.

[0027] An operation switch connector 17 to which the operation switch 30 is connected is provided on the left side surface of the main body 10. In addition, a handle 18 for carrying the main body 10 is provided on the upper part of the main body 10. Although not shown in the figure, a power connector and a power switch connected to a commercial AC power supply for receiving power supply are provided on the back surface of the main body 10.

[0028] The electrodes 21 to 24 are inserted into the body of a patient who is a treatment target for performing high-frequency treatment to pass a high-frequency current through the body. In the present embodiment, the electrodes 21 to 24 are configured in a needle tube shape that can be punctured into a human body or the like, and it is also possible to inject a drug or the like through the electrodes 21 to 24. The electrodes 21 to 24 are formed as insulating portions 21b to 24b that are mostly coated with an insulating coating except for non-insulating portions 21a to 24a at the tip portions, and the high-frequency current is output from the non-insulating portions 21a to 24a.

[0029] In addition, thermocouples 21c to 24c for measuring the treatment temperature are built into the electrodes 21 to 24. The electrodes 21 to 24 are electrically connected to the main body 10 via electrode cables 28 and electrode connectors 11 to 14. Note that the electrodes 21 to 24 may have other shapes, for example, rod-shaped ones inserted into a needle tube or a catheter. Also, the thermocouples 21c to 24c may be provided separately from the electrodes 21 to 24.

[0030] The counter electrode plate 25 is a flat electrode that is attached and disposed on the skin surface of a patient who is the treatment target, and is for passing a high-frequency current between the electrodes 21 to 24 inserted therein. That is, the counter electrode plate 25 is used when passing a high-frequency current with a so-called monopolar method. The counter electrode plate 25 is electrically connected to the main body 10 via a counter electrode plate cable 31 and a counter electrode plate connector 15. Note that in the present embodiment, the counter electrode plate 25 is configured in a rectangular flat plate shape, but the shape of the counter electrode plate 25 may be other shapes.

[0031] The operation switch 30 is to be held by the patient who is the treatment target during treatment and operated by the patient. The operation switch 30 includes a push button 30a that is pressed by the patient, and is electrically connected to the main body 10 via an operation switch connector 17.

[0032] In the present embodiment, when the patient feels pain during treatment, the patient is made to press the push button 30a to determine whether the patient is feeling pain. Then, based on the detection of the patient's operation by the operation switch 30, the output of the high-frequency power is reduced, thereby reducing the patient's pain. That is, the operation switch 30 constitutes the operation detection unit of the present invention.

[0033] FIG. 2 is a block diagram showing the internal configuration of the high-frequency treatment device 1. As shown in the figure, the high-frequency treatment device 1 includes, as its internal configuration, a first output unit 41, a second output unit 42, a switching unit 50, a first temperature measurement unit 61, a second temperature measurement unit 62, a reference signal generation unit 63, a temperature abnormality detection unit 64, a voltage measurement unit 71, a current measurement unit 72, a main control unit 80, and a sub-control unit 90.

[0034] The first output unit 41 and the second output unit 42 generate and output high-frequency power of a preset frequency (for example, 470 to 490 kHz) and a voltage (for example, 18 to 22 Vrms) based on the output control signal from the main control unit 80, based on the power supplied from a commercial AC power supply. The first output unit 41 and the second output unit 42 are each composed of a known circuit having a transformer, whereby the body to be treated is insulated from the commercial AC power supply.

[0035] The first output unit 41 is connected to the electrode connector 11, the electrode connector 12, the electrode connector 13, and the counter electrode plate connector 15 via the switching unit 50, that is, it is connected so as to be able to output high-frequency power to the electrodes 21, 22, 23, and the counter electrode plate 25. Further, the second output unit 42 is connected to the electrode connector 13, the electrode connector 14, and the counter electrode plate connector 15 via the switching unit 50, that is, it is connected so as to be able to output high-frequency power to the electrodes 23, 24, and the counter electrode plate 25.

[0036] Therefore, the first output unit 41 and the second output unit 42 constitute the output unit of the present invention. In the present embodiment, by providing two output units, the first output unit 41 and the second output unit 42, it is possible to flow a high-frequency current while stably performing output control in two electrode sets (for example, the electrode set of electrodes 21 and 22 and the electrode set of electrodes 23 and 24) at the same time.

[0037] The switching unit 50 operates under the control of the sub-control unit 90 and switches the connections between the first output unit 41 and the second output unit 42 and the electrode connectors 11 to 14 and the counter electrode plate connector 15. That is, the switching unit 50 switches which electrode set among the electrode sets formed by combining at least two electrodes 21 to 24 and the counter electrode plate 25 has a high-frequency current flowing through it.

[0038] The switching unit 50 is composed of a circuit including a plurality of switches 51 made of semiconductor switches such as MOSFETs (Metal Oxide Semiconductor Field Effect Transistors) or reed relays, and is provided between the first output unit 41 and the second output unit 42 and the electrodes 21 to 24 and the counter electrode plate 25.

[0039] In the present embodiment, since two output units, the first output unit 41 and the second output unit 42, are provided, it is possible to reduce the number of switches 51, simplify the configuration of the switching unit 50, and speed up the switching of the connections between the first output unit 41 and the second output unit 42 and the respective electrodes 21 to 24.

[0040] The first temperature measurement unit 61 and the second temperature measurement unit 62 are composed of a known circuit or the like, generate a temperature measurement signal (for example, 25 mV / °C) based on the signals received from the thermocouples 21c to 24c, and transmit it to the sub-control unit 90 and the temperature abnormality detection unit 64. The first temperature measurement unit 61 is connected to the thermocouple 21c built in the electrode 21 and the thermocouple 23c built in the electrode 23. Also, the second temperature measurement unit 62 is connected to the thermocouple 22c built in the electrode 22 and the thermocouple 24c built in the electrode 24. That is, the thermocouples 21c to 24c, the first temperature measurement unit 61, and the second temperature measurement unit 62 constitute the temperature measurement unit of the present invention.

[0041] In this embodiment, by providing two temperature measurement units, i.e., the first temperature measurement unit 61 and the second temperature measurement unit 62, it is possible to accurately measure the ambient temperatures of all four electrodes 21 to 24 in a short time. That is, while ensuring sufficient measurement time for each of the thermocouples 21c to 24c, the overall measurement time is not lengthened.

[0042] Also, by having the first temperature measurement unit 61 and the second temperature measurement unit 62 measure both the ambient temperature of the electrode 21, 22, or 23 from which high-frequency power is output by the first output unit 41 and the ambient temperature of the electrode 23 or 24 from which high-frequency power is output by the second output unit 42, respectively, it is possible to detect the occurrence of temperature anomalies by the first output unit 41 or the second output unit 42 even when either the first temperature measurement unit 61 or the second temperature measurement unit 62 malfunctions, improving safety.

[0043] The reference signal generation unit 63 is composed of a known circuit or the like and generates a temperature reference signal that serves as a reference for determining whether the temperature measured by the first temperature measurement unit 61 or the second temperature measurement unit 62 is an abnormal temperature. The reference signal generation unit 63 is controlled by the sub-control unit 90 to generate, for example, a temperature reference signal corresponding to the temperature set value +7°C. Here, the temperature set value is input to the operation unit 16 as the temperature to be maintained during treatment, acquired by the main control unit 80, and transmitted to the sub-control unit 90. The generated temperature reference signal is transmitted to the temperature anomaly detection unit 64.

[0044] The temperature anomaly detection unit 64 is composed of a known circuit or the like, compares the temperature reference signal received from the reference signal generation unit 63 with the temperature measurement signal received from the first temperature measurement unit 61 or the second temperature measurement unit 62, and detects the occurrence of temperature anomalies. When the voltage of the temperature measurement signal is higher than the voltage of the temperature reference signal, the temperature anomaly detection unit 64 transmits an output stop signal to the first output unit 41, the second output unit 42, and the main control unit 80. The first output unit 41 and the second output unit 42 that receive the output stop signal stop the output of high-frequency power. Also, the main control unit 80 that receives the output stop signal performs temperature anomaly processing such as alarm display.

[0045] The voltage measurement unit 71 is composed of a known circuit or the like, and individually measures the voltages of the high-frequency power output from the first output unit 41 and the second output unit 42. The voltage measurement unit 71 generates a voltage measurement signal based on the high-frequency voltages generated by the first output unit 41 and the second output unit 42, and transmits it to the main control unit 80.

[0046] The current measurement unit 72 is composed of a known circuit or the like, and individually measures the high-frequency currents flowing through the electrodes 21 to 24. The current measurement unit 72 generates a current measurement signal based on the high-frequency currents flowing through the electrodes 21 to 24, and transmits it to the main control unit 80.

[0047] The main control unit 80 includes a known configuration such as a CPU, a ROM, and a RAM, and controls each part of the high-frequency treatment device 1, such as the operation unit 16, the first output unit 41, and the second output unit 42, to execute high-frequency treatment. The main control unit 80 transmits a connection mode signal indicating the connection mode of the first output unit 41 and the second output unit 42 and the electrode connectors 11 to 14 and the counter electrode plate connector 15 to the sub-control unit 90 based on the input operation received by the operation unit 16.

[0048] The main control unit 80 also starts or ends the output of the high-frequency power from the first output unit 41 or the second output unit 42 based on the input operation received by the operation unit 16, and performs output control of the high-frequency power by PID control so that the temperature measurement value received from the sub-control unit 90 is substantially equal to the control target value. That is, the main control unit 80 constitutes the control unit of the present invention.

[0049] As this output control, the main control unit 80 performs two types of control: normal output control and output reduction control that reduces the output of high-frequency power compared to this normal output control. In the present embodiment, in the normal output control, the main control unit 80 performs output control by setting the control target value to the temperature set value (first target value) input to the operation unit 16. Also, in the output reduction control, the main control unit 80 performs control by setting the control target value to a second target value that is 10°C lower than the current temperature measurement value.

[0050] Output reduction control is performed to reduce the pain felt by the patient who is the treatment target. Therefore, when the operation switch 30 detects the patient's operation, the main control unit 80 shifts the output control from the normal output control up to that point to the output reduction control. Details of the output control will be described later.

[0051] Figs. 3A and B are schematic views showing the configuration of the operation switch 30. As shown in these figures, the operation switch 30 includes a bipolar single-pole switch 30b that operates by the operation of a push button 30a. This bipolar single-pole switch 30b is arranged to switch the connection / disconnection between the output terminal 81 of the main control unit 80 and the first input terminal 82 and the second input terminal 83.

[0052] Specifically, as shown in Fig. 3A, when the patient who is the treatment target is not pressing the push button 30a, the bipolar single-pole switch 30b maintains the off state, and the output terminal 81 and the first input terminal 82 and the second input terminal 83 are disconnected. Then, as shown in Fig. 3B, when the patient presses the push button 30a, the bipolar single-pole switch 30b becomes the on state, and the output terminal 81 and the first input terminal 82 and the second input terminal 83 are connected.

[0053] When the output terminal 81 and the first input terminal 82 and the second input terminal 83 are connected, the voltage applied to the output terminal 81 is also applied to the first input terminal 82 and the second input terminal 83. Specifically, in the state where the patient is not pressing the push button 30a, both the first voltage value E1 input to the first input terminal 82 and the second voltage value E2 input to the second input terminal 83 are 0V (reference potential), and in the state where the patient is pressing the push button 30a, the first voltage value E1 and the second voltage value E2 are equal to the detection voltage value E0 (for example, 3.3V) output from the output terminal 81. In other words, the operation switch 30 is configured to change the first voltage value E1 and the second voltage value E2 input to the main control unit 80 when receiving the patient's operation.

[0054] The main control unit 80 monitors the voltages input to the first input terminal 82 and the second input terminal 83, and determines whether the operation switch 30 has detected the operation of the patient who is the treatment target based on the changes in the first voltage value E1 and the second voltage value E2. Specifically, when both the first voltage value E1 and the second voltage value E2 are 0V, the main control unit 80 determines that the operation switch 30 has not detected the operation of the patient. The main control unit 80 also determines that the operation switch 30 has detected the operation of the patient when both the first voltage value E1 and the second voltage value E2 are the detection voltage value E0.

[0055] Also, when the first voltage value E1 and the second voltage value E2 are different from each other, the main control unit 80 determines that a failure has occurred in one of the parts, and causes an alarm to be displayed on the touch panel display 16a. In this way, by configuring the operation switch 30 so as to change the first voltage value E1 and the second voltage value E2 input to the main control unit 80 when receiving the operation of the patient, the safety can be improved and the problems associated with the false detection of the operation switch 30 can be prevented. That is, it is possible to prevent problems such as the output not being reduced even though the patient being treated is in pain, or the temperature measurement value not rising to the temperature set value even though the patient is not in pain.

[0056] In addition, the main control unit 80 calculates a voltage measurement value, a current measurement value, a power measurement value, and an impedance measurement value based on the voltage measurement signal received from the voltage measurement unit 71 and the current measurement signal received from the current measurement unit 72, and causes them to be displayed on the touch panel display 16a together with the temperature measurement value.

[0057] Note that in the high-frequency coagulation method, the main control unit 80 uses the output voltage as the operation amount, and in the pulsed high-frequency method, the main control unit 80 uses the output pulse width as the operation amount. When the output voltage value is set by the input operation received by the operation unit 16, the main control unit 80 performs output control of the high-frequency power by PID control so that the voltage measurement value becomes equal to the voltage set value.

[0058] The sub-control unit 90 has a known configuration such as a CPU, a ROM, and a RAM, similar to the main control unit 80, and controls the switching unit 50, the first temperature measurement unit 61, the second temperature measurement unit 62, and the reference signal generation unit 63. The sub-control unit 90 controls the on / off states of the plurality of switches 51 provided in the switching unit 50 based on the connection mode signal transmitted from the main control unit 80, and switches the connection states between the first output unit 41 and the second output unit 42 and the electrode connectors 11 to 14 and the counter electrode plate connector 15.

[0059] The sub-control unit 90 also calculates a temperature measurement value based on the temperature measurement signal received from the first temperature measurement unit 61 or the second temperature measurement unit 62, and transmits it to the main control unit 80. Further, the sub-control unit 90 controls the reference signal generation unit 63 based on the temperature set value received from the main control unit 80, generates a temperature reference signal, and transmits it to the temperature abnormality detection unit 64.

[0060] Note that the switching unit 50, the first temperature measurement unit 61, the second temperature measurement unit 62, the reference signal generation unit 63, the temperature abnormality detection unit 64, the voltage measurement unit 71, the current measurement unit 72, and the sub-control unit 90 are insulated from the commercial AC power supply in order to protect the body to be treated from high-voltage current.

[0061] Next, the operation of the high-frequency treatment device 1 will be described.

[0062] As output formats of high-frequency current to the treatment target, the high-frequency treatment device 1 can have four types: monopolar, bipolar, tripolar, and quadrupolar. In the present embodiment, the monopolar is an output format in which a high-frequency current flows through an electrode set formed by combining any one of the electrodes 21 to 24 and the counter electrode plate 25, and the bipolar is an output format in which a high-frequency current flows through the electrode set of the electrodes 21 and 22 or the electrodes 23 and 24.

[0063] In addition, the tri-polar device uses electrodes 21, 22, and 23 as an electrode set, and has an output format in which a high-frequency current flows between electrode 21 and electrodes 22 and 23, between electrode 22 and electrodes 21 and 23, or between electrode 23 and electrodes 21 and 22. Further, in the tri-polar device, it is also possible to switch the states in which a high-frequency current flows between electrode 21 and electrodes 22 and 23, between electrode 22 and electrodes 21 and 23, and between electrode 23 and electrodes 21 and 22 at a specific cycle (for example, 0.1 second).

[0064] Hereinafter, the operation of the high-frequency treatment device 1 will be described by taking the case where the output format is a quad-polar device as an example. FIGS. 4A and B are schematic views showing the operating states in the quad-polar device. For ease of understanding, FIGS. 4A and B show only the switches 51a to 51g necessary for the description among the plurality of switches 51 provided in the switching unit 50.

[0065] As shown in these figures, when performing high-frequency treatment with the quad-polar device, first, all of the four electrodes 21 to 24 are inserted into the treatment target 100. At this time, the electrodes 21 to 24 are arranged in a row at substantially equal intervals in this order, for example.

[0066] When arranging the electrodes 21 to 24, nerve exploration and measurement of the impedance of the peripheral tissues of the electrodes 21 to 24 are performed. However, since this is a prior art, the description is omitted. Also, before or after inserting the electrodes 21 to 24, a local anesthetic is injected near the arrangement positions of the electrodes 21 to 24 to reduce pain caused by overheating during the treatment.

[0067] If the electrodes 21 to 24 are appropriately arranged and the operation unit 16 receives a selection operation of the quadrupolar by a user such as a doctor, the main control unit 80 transmits a connection mode signal indicating the connection mode of the quadrupolar to the sub-control unit 90. If the sub-control unit 90 receives a connection mode signal indicating the connection mode of the quadrupolar from the main control unit 80, it controls the switching unit 50 to set the connection state between the first output unit 41 and the second output unit 42 and the electrodes 21 to 24 to the first state shown in FIG. 4A.

[0068] Specifically, in the first state, the sub-control unit 90 turns on the switches 51a, 51c, 51e, and 51g and turns off the switches 51b, 51d, and 51f. As a result, the first output unit 41 is connected to the electrodes 21 and 22, and the second output unit 42 is connected to the electrodes 23 and 24. Therefore, a high-frequency current flows between the electrodes 21 and 22 due to the high-frequency power output from the first output unit 41, and a high-frequency current flows between the electrodes 23 and 24 due to the high-frequency power output from the second output unit 42. As a result, the electrodes 21 and 22, and the electrodes 23 and 24 respectively constitute the first electrode group 201 which is an electrode group through which a high-frequency current flows in the first state.

[0069] Thereafter, after the operation unit 16 receives a selection operation of the high-frequency coagulation method or the pulsed high-frequency method by the user, and an input operation of a temperature setting value (for example, 80° C.) and a treatment time (for example, 3 minutes) (when the pulsed high-frequency method is selected, since the main control unit 80 sets the temperature setting value to 42° C., only the treatment time is input), if the operation unit 16 receives a start operation of the treatment, the main control unit 80 controls the first output unit 41 and the second output unit 42 to start the output of high-frequency power. Further, the main control unit 80 transmits an output start signal indicating that the output has started to the sub-control unit 90.

[0070] If the sub-control unit 90 receives an output start signal from the main control unit 80, it controls the switching unit 50 to switch the connection states of the first output unit 41 and the second output unit 42 and the electrodes 21 to 24 between the first state shown in FIG. 4A and the second state shown in FIG. 4B at a specific period (in this embodiment, 0.1 second).

[0071] In the second state, as shown in FIG. 4B, the sub-control unit 90 turns on the switch 51b and the switch 51d, and turns off the switch 51a, the switch 51c, the switch 51e, the switch 51f, and the switch 51g. As a result, the first output unit 41 is connected to the electrode 22 and the electrode 23, and a high-frequency current flows between the electrode 22 and the electrode 23 due to the high-frequency power output from the first output unit 41. As a result, the electrode 22 and the electrode 23 constitute the second electrode group 202 which is an electrode group through which a high-frequency current flows in the second state.

[0072] During the output of the high-frequency power, by the switching control of the switching unit 50 by the sub-control unit 90, the first state in which a high-frequency current flows between the electrode 21 and the electrode 22 and between the electrode 23 and the electrode 24 and the second state in which a high-frequency current flows between the electrode 22 and the electrode 23 are periodically switched. As a result, the regions between the electrode 21 and the electrode 22 and around them, the regions between the electrode 22 and the electrode 23 and around them, and the regions between the electrode 23 and the electrode 24 and around them are each intermittently heated. In this embodiment, by setting the switching period to 0.1 second, the temperature of each region does not drop too much when not being heated.

[0073] The main control unit 80 performs output control of the first output unit 41 and the second output unit 42 in parallel with the switching control of the switching unit 50 by the sub-control unit 90. FIG. 5 is a flowchart showing an outline of the flow of the output control.

[0074] In output control, first in step S11, the main control unit 80 determines whether the temperature measurement value received from the sub-control unit 90 is greater than 50°C, which is the temperature reference value. If the received temperature measurement value is greater than 50°C, the process proceeds to step S12. If the received temperature measurement value is 50°C or less, the process proceeds to step S14.

[0075] In step S12, the main control unit 80 determines, based on the first voltage value E1 and the second voltage value E2, whether the operation switch 30 has detected an operation of the patient who is the treatment target. If the operation switch 30 has detected an operation of the treatment target, the process proceeds to step S13. If the operation switch 30 has not detected an operation of the treatment target, the process proceeds to step S14.

[0076] In step S13, the main control unit 80 sets the control target value to the first target value, that is, the temperature set value input to the operation unit 16. Thereby, the main control unit 80 performs normal output control. Also in step S13, the main control unit 80 transmits the set control target value to the sub-control unit 90.

[0077] In step S14, the main control unit 80 sets the control target value to the second target value, that is, a value 10°C lower than the current temperature measurement value referred to in step S12. Thereby, the main control unit 80 performs output reduction control. Also in step S14, the main control unit 80 transmits the set control target value to the sub-control unit 90.

[0078] In step S15, the main control unit 80 controls the output of the high-frequency power from the first output unit 41 and the second output unit 42 by PID control. Specifically, the output voltage from the first output unit 41 and the second output unit 42 is adjusted so that the temperature measurement value received from the sub-control unit 90 becomes substantially equal to the control target value set in step S13 or S14.

[0079] In step S16, it is determined whether or not the treatment time input to the operation unit 16 has elapsed. If the treatment time has elapsed, the output control is terminated. If the treatment time has not elapsed, the process returns to step S11, and the processes of steps S11 to S16 are repeated.

[0080] If the main control unit 80 has terminated the output control, it stops the output of high-frequency power from the first output unit 41 and the second output unit 42. The main control unit 80 also transmits an output end signal to the sub-control unit 90. The sub-control unit 90 that has received the output end signal from the main control unit 80 stops the switching control between the first state and the second state for the switching unit 50. Thus, one treatment is completed.

[0081] FIG. 6 is a time chart showing an example of changes in the control state of the main control unit 80 and the temperature measurement values in high-frequency treatment. In FIG. 6, the horizontal axis represents time t. Also, the change in the temperature measurement value shown in FIG. 6 is not necessarily accurate.

[0082] As shown in FIG. 6, in high-frequency treatment, the main control unit 80 first starts the output of high-frequency power to the first output unit 41 and the second output unit 42 at time t0 and starts normal output control. As a result, the temperature measurement value, that is, the peripheral temperature of the electrodes 21 to 24, rises toward the temperature set value (first target value).

[0083] When the patient who is the treatment target feels pain and operates the operation switch 30 at time t1 when the temperature measurement value exceeds the temperature reference value and approaches the temperature set value, the main control unit 80 switches the normal output control to the output reduction control. In the output reduction control, since a temperature 10° C. lower than the current temperature measurement value is set as the control target value, the temperature measurement value will decrease. Also, during the output reduction control, each time the process of step S14 is repeated, the control target value becomes a low value, and since the temperature measurement value never becomes equal to the control target value, the temperature measurement value continuously decreases.

[0084] Due to the decrease in the peripheral temperature of the electrodes 21 to 24 and the effect of prior local anesthesia, the patient no longer feels pain. When the operation of the operation switch 30 is released at time t2, the main control unit 80 switches the output reduction control to the normal output control. As a result, the temperature measurement value rises again toward the temperature set value and is maintained at a temperature approximately equal to the temperature set value after reaching the temperature set value. Thereby, thermal coagulation and denaturation of the tissue occur.

[0085] Thereafter, at time t3 when the treatment time has elapsed, the main control unit 80 terminates the normal output control and also terminates the output of high-frequency power from the first output unit 41 and the second output unit 42. The nerve tissue contained in the region 110 is heated at a temperature of, for example, 80°C for about 3 minutes, and as a result, the state of blocking pain signals is achieved.

[0086] Thus, according to the high-frequency treatment device 1, when the patient who is the treatment target feels pain due to heating, it is possible to shift to the output reduction control by the patient's own operation, so that the pain felt by the patient during the treatment can be reduced. Further, in the present embodiment, since the output reduction control is realized by changing the control target value, it is possible to prevent the complication of the control algorithm and the occurrence of bugs and the like associated therewith and the high cost of the device configuration. Furthermore, in the present embodiment, since the control target value in the output reduction control is set to a temperature 10°C lower than the current temperature measurement value, it is possible to surely reduce the output regardless of the temperature when the operation switch 30 is operated.

[0087] Also, in the present embodiment, since the output reduction control is realized by changing the control target value, it is possible to prevent the complication of the control algorithm and the occurrence of bugs and the like associated therewith and the high cost of the device configuration. Further, in the present embodiment, since the control target value in the output reduction control is set to a temperature 10°C lower than the current temperature measurement value, it is possible to surely reduce the output regardless of the temperature when the operation switch 30 is operated.

[0088] In addition, in the present embodiment, since output reduction control is not performed when the temperature measurement value is lower than the temperature reference value, it is possible to prevent the ambient temperature of the electrodes 21 to 24 from dropping too much even during output reduction control. As a result, the time required for the ambient temperature of the electrodes 21 to 24 to rise to the temperature set value after the output reduction control can be shortened, and the treatment can be made more efficient.

[0089] Note that when the temperature measurement value drops to the temperature reference value during the output reduction control, the normal output control and the output reduction control will periodically switch, and the temperature measurement value (the ambient temperature of the electrodes 21 to 24) will be maintained at a temperature substantially equal to the temperature reference value. Also, when the operation switch 30 is operated while the temperature measurement value is below the temperature reference value, after the temperature measurement value rises to the temperature reference value by the normal output control, the normal output control and the output reduction control will periodically switch, and the temperature measurement value (the ambient temperature of the electrodes 21 to 24) will be maintained at a temperature substantially equal to the temperature reference value.

[0090] In addition, in the present embodiment, since the temperature reference value is set to 50°C, which is higher than the temperature set value of 42°C in the pulse high-frequency method, output reduction control is not performed in the pulse high-frequency method. In other words, in the present embodiment, by setting the temperature reference value in this way, it is possible to perform the output control in the pulse high-frequency method where output reduction control is unnecessary due to the low temperature set value, using the same control algorithm as the high-frequency coagulation method.

[0091] Next, a modified example of the high-frequency treatment device 1 will be described.

[0092] FIGS. 7A and B are schematic views showing a modified example of the operation switch 30. As shown in these figures, the operation switch 30 in this example includes a single-pole double-throw switch 30c that operates by the operation of a push button 30a. This single-pole double-throw switch 30c is arranged to switch the connection with the output terminal 81 of the main control unit 80 between a first input terminal 82 and a second input terminal 83.

[0093] Specifically, as shown in FIG. 7A, when the patient to be treated does not press the push button 30a, the single-pole double-throw switch 30c disconnects the output terminal 81 and the first input terminal 82, and maintains the state of connecting the output terminal 81 and the second input terminal 83. Then, as shown in FIG. 7B, when the patient presses the push button 30a, the single-pole double-throw switch 30c connects the output terminal 81 and the first input terminal 82, and disconnects the output terminal 81 and the second input terminal 83.

[0094] Therefore, when the patient does not press the push button 30a, the first voltage value E1 input to the first input terminal 82 becomes 0V (reference potential), and the second voltage value E2 input to the second input terminal 83 becomes the detection voltage value E0 (for example, 3.3V). Also, when the patient presses the push button 30a, the first voltage value E1 becomes the detection voltage value E0, and the second voltage value E2 becomes 0V.

[0095] Then, the main control unit 80 monitors the voltages input to the first input terminal 82 and the second input terminal 83. When the first voltage value E1 is 0V and the second voltage value E2 is the detection voltage value E0, the main control unit 80 determines that the operation switch 30 has not detected the patient's operation. Also, when the first voltage value E1 is the detection voltage value E0 and the second voltage value E2 is 0V, the main control unit 80 determines that the operation switch 30 has detected the patient's operation. The main control unit 80 also determines that a failure has occurred in either part when the first voltage value E1 and the second voltage value E2 are substantially equal to each other, and causes an alarm to be displayed on the touch panel display 16a.

[0096] In this way, the operation switch 30 may include a single-pole double-throw switch 30c, and in this case as well, problems associated with misdetection of the operation switch 30 can be prevented.

[0097] In addition, although illustration is omitted, instead of performing output reduction control only while the operation switch 30 detects the operation of the patient who is the treatment target, output reduction control may be performed for only a predetermined period (for example, 10 seconds) based on the fact that the operation switch 30 has detected the patient's operation. When it is difficult for the patient to continue operating the operation switch 30 when feeling pain, it is preferable to perform such control.

[0098] Also, the second target value is not limited to being 10°C lower than the current temperature measurement value, and may be lower than the current temperature measurement value by some other temperature. Also, the second target value may be lower than the temperature set value (the first target value) by a predetermined temperature. Also, the temperature reference value is not limited to 50°C, and may be some other temperature. Also, output reduction control may be performed without setting the temperature reference value and regardless of the temperature measurement value.

[0099] Also, instead of changing the control target value in the output reduction control, the output may be reduced by multiplying the operation amount or the temperature measurement value by a predetermined coefficient. Also, instead of changing the control target value in the output reduction control, during the output reduction control, the output of the high-frequency power from the first output unit 41 and the second output unit 42 may be stopped or fixed to a predetermined output.

[0100] Also, the operation switch 30 is not limited to being operated by the patient's finger, and may be operated by other parts such as the mouth or foot, for example. Also, the operation switch 30 is not limited to including the push button 30a and the single-pole double-throw switch 30b or the single-pole double-throw switch 30c, and various known configurations can be adopted. Also, the operation switch 30 may perform wireless communication with the main control unit 80.

[0101] Next, a second embodiment of the present invention will be described.

[0102] The high-frequency treatment device 2 according to the second embodiment is for performing nerve block by partially heating the peripheral nerve with high-frequency current, similar to the high-frequency treatment device 1 according to the first embodiment. Note that the high-frequency treatment device 2 has basically the same configuration as the high-frequency treatment device 1 except that it includes only three electrodes 21, 22, and 23 and has a different internal configuration. Therefore, hereinafter, the same parts as those in the first embodiment are denoted by the same reference numerals and their descriptions are omitted, and only the parts different from the first embodiment are described.

[0103] FIG. 8 is a block diagram showing the internal configuration of the high-frequency treatment device 2. As shown in the figure, the high-frequency treatment device 2 includes, as its internal configuration, an output unit 40, a switching unit 50, a temperature measurement unit 60, a comparison voltage generation unit 210, a temperature comparison unit 220, a proportional control unit 230, a voltage / current measurement unit 70, and a main control unit 80.

[0104] The output unit 40 generates and outputs high-frequency power of a preset frequency (for example, 470 to 490 kHz) and a voltage (for example, 18 to 22 Vrms) based on an output control signal from the main control unit 80, based on the power supplied from a commercial AC power supply, with the same configuration as the first output unit 41 and the second output unit 42. The output unit 40 is connected to the electrode connectors 11 to 13 and the counter electrode plate connector 15 via the switching unit 50, that is, it is connected so as to be able to output high-frequency power to the electrodes 21 to 23 and the counter electrode plate 25.

[0105] The switching unit 50 is composed of a circuit including a plurality of switches 51 made of semiconductor switches such as MOSFETs or reed relays, similar to the first embodiment, and is provided between the output unit 40 and the electrodes 21 to 23 and the counter electrode plate 25. In this embodiment, the switching unit 50 operates under the control of the main control unit 80 to switch the connection between the output unit 40 and the electrode connectors 11 to 13 and the counter electrode plate connector 15.

[0106] The temperature measurement unit 60 is composed of a known circuit or the like, and based on the signals received from the thermocouples 21c to 23c, it generates a temperature measurement signal of, for example, 40 mV / °C and transmits it to the main control unit 80. At the same time, it generates a temperature measurement signal of, for example, 20 mV / °C and transmits it to the temperature comparison unit 220.

[0107] The comparison voltage generation unit 210 is composed of a known circuit or the like, and generates a control reference voltage signal used for output control of the output unit 40 and a determination reference voltage signal used for abnormal determination of the measured temperature. The comparison voltage generation unit 210 is controlled by the main control unit 80, and based on the control target value received from the main control unit 80, it generates a control reference voltage signal (voltage indicating the control target value) and transmits it to the temperature comparison unit 220. The comparison voltage generation unit 210 also generates a determination reference voltage signal (for example, a voltage indicating the temperature set value + 7°C) based on the temperature set value received from the main control unit 80 and transmits it to the temperature comparison unit 220.

[0108] The temperature comparison unit 220 is composed of a known circuit or the like, and transmits a differential voltage signal indicating the difference between the control reference voltage signal received from the comparison voltage generation unit 210 and the voltage of the temperature measurement signal received from the temperature measurement unit 60 to the proportional control unit 230. The temperature comparison unit 220 also compares the determination reference voltage signal received from the comparison voltage generation unit 210 with the voltage of the temperature measurement signal received from the temperature measurement unit 60. When the voltage of the temperature measurement signal is high, it transmits an output stop signal to the output unit 40 and the main control unit 80. The output unit 40 that receives the output stop signal stops the output of the high-frequency power, and the main control unit 80 that receives the output stop signal performs temperature abnormality processing such as alarm display.

[0109] The proportional control unit 230 is composed of a known PWM circuit or the like including a sawtooth wave transmitter and a comparator. It compares the differential voltage signal received from the temperature comparison unit 220 with the sawtooth wave signal to generate a pulse signal and transmits it to the output unit 40. The output unit 40 outputs high-frequency power of a voltage based on a temperature control signal synthesized from the pulse signal received from the proportional control unit 230 and the output control signal received from the main control unit 80.

[0110] The voltage / current measurement unit 70 is composed of a known circuit or the like, and measures the voltage and current of the high-frequency power output by the output unit 40. The voltage / current measurement unit 70 generates a voltage measurement signal and a current measurement signal based on the high-frequency voltage and high-frequency current generated by the output unit 40, and transmits them to the main control unit 80.

[0111] The main control unit 80 includes known components such as a CPU, a ROM, and a RAM, and controls each part of the high-frequency treatment device 2 to execute high-frequency treatment in the same manner as in the first embodiment. The main control unit 80 calculates a temperature measurement value based on the temperature measurement signal received from the temperature measurement unit 60. The main control unit 80 also generates an output control signal based on the calculated temperature measurement value, and transmits it to the output unit 40 to perform output control of the high-frequency power together with the proportional control unit 230.

[0112] That is, in step S15 of the output control shown in FIG. 5, the main control unit 80 of the present embodiment transmits the control target value set in step S13 or S14 to the proportional control unit 230, and generates an output control signal based on the temperature measurement value and transmits the output control signal to the output unit 40.

[0113] In addition, the main control unit 80 calculates a voltage measurement value, a current measurement value, a power measurement value, and an impedance measurement value based on the received voltage measurement signal and current measurement signal. In the present embodiment, the main control unit 80 controls the switching unit 50. Specifically, the main control unit 80 controls the on / off of a plurality of switches 51 provided in the switching unit 50 based on the input operation received by the operation unit 16, and switches the connection state between the output unit 40 and the electrode connectors 11 to 13 and the counter electrode plate connector 15.

[0114] Next, the operation of the high-frequency treatment device 2 will be described.

[0115] The high-frequency treatment device 2 can output high-frequency current to the treatment target in three forms: monopolar, bipolar, and tripolar. In this embodiment, the monopolar form is to pass a high-frequency current through an electrode set formed by combining any one of the electrodes 21 to 23 and the counter electrode plate 25, and the bipolar form is to pass a high-frequency current through the electrodes 21 and 22 as an electrode set.

[0116] Hereinafter, the operation of the high-frequency treatment device 2 will be described by taking the case where the output form is tripolar as an example. FIGS. 9A to 9C are schematic views showing the operation states in the tripolar. For ease of understanding, FIGS. 9A to 9C show only the switches 51a to 51f necessary for the description.

[0117] If local anesthesia for reducing pain due to overheating during treatment and the arrangement of the electrodes 21 to 23 are appropriately performed, and the operation unit 16 receives a selection operation of the tripolar by a user such as a doctor, the main control unit 80 controls the switching unit 50 to set the connection state between the output unit 40 and the electrodes 21 to 23 to the state shown in FIG. 9A. Specifically, the main control unit 80 turns on the switches 51c, 51e, and 51f and turns off the switches 51a, 51b, and 51d. As a result, a high-frequency current flows between the electrode 22 and the electrodes 21 and 23 in the electrode set composed of the three electrodes 21 to 23 due to the high-frequency power output from the output unit 40.

[0118] After that, after the operation unit 16 receives a selection operation of the high-frequency coagulation method or the pulsed high-frequency method by the user, and an input operation of a temperature set value (for example, 80°C) and a treatment time (for example, 3 minutes) (when the pulsed high-frequency method is selected, the main control unit 80 sets the temperature set value to 42°C, so only the treatment time is input), if the operation unit 16 receives a start operation of the treatment, the main control unit 80 controls the output unit 40 to start the output of high-frequency power.

[0119] In addition, the main control unit 80 controls the switching unit 50 to switch the connection states between the output unit 40 and the electrodes 21 to 23 among three states shown in FIGS. 9A to 9C at a specific cycle (in this embodiment, 0.1 second). Specifically, in the state shown in FIG. 9B, the switches 51b, 51d, and 51f are turned on, and the switches 51a, 51c, and 51e are turned off, so that a high-frequency current flows between the electrode 21 and the electrodes 22 and 23. Further, in the state shown in FIG. 9C, the switches 51b, 51c, and 51f are turned on, and the switches 51a, 51d, and 51e are turned off, so that a high-frequency current flows between the electrode 23 and the electrodes 21 and 22.

[0120] That is, the main control unit 80 controls the switching unit 50 to sequentially switch any one of the electrodes 21 to 23 at a specific cycle and cause a high-frequency current to flow between the remaining two electrodes. As a result, the regions between and around the electrodes 21 and 22, between and around the electrodes 22 and 23, and between and around the electrodes 23 and 21 are heated.

[0121] The main control unit 80 performs output control of the first output unit 41 and the second output unit 42 in parallel with the switching control of the switching unit 50. The output control in this embodiment is the same as that in the first embodiment except for the process of step S15 described above, and the changes in the control state of the main control unit 80 and the temperature measurement values during the treatment are also the same as those in the first embodiment, so the description thereof is omitted.

[0122] In this embodiment, based on the temperature measurement value of the thermocouple 22c built in the electrode 22 in the state shown in FIG. 9A, the temperature measurement value of the thermocouple 21c built in the electrode 21 in the state shown in FIG. 9B, and the temperature measurement value of the thermocouple 23c built in the electrode 23 in the state shown in FIG. 9C, output control by the main control unit 80 and the proportional control unit 230 is performed. That is, in this embodiment, by referring to the temperature around the one with the highest current density among the electrodes 21 to 23, the accuracy and stability of the output control are improved.

[0123] As described above, the embodiments of the present invention have been explained. However, the high-frequency treatment device and the high-frequency treatment method of the present invention are not limited to the above-described embodiments, and it goes without saying that various changes can be made without departing from the gist of the present invention.

[0124] For example, the shapes and arrangements of the respective parts of the high-frequency treatment devices 1 and 2 are not limited to the shapes and arrangements shown in the above-described embodiments, and various known shapes and arrangements can be adopted. Further, the high-frequency treatment devices 1 and 2 are not limited to those for performing nerve blocks, and may be used for other applications such as ablation of tumors, for example.

[0125] Also, the number of each component provided in the high-frequency treatment devices 1 and 2 is not limited to the number shown in the above-described embodiments, and any number can be adopted. For example, in the high-frequency treatment device 1, the second output unit 42 may be omitted and high-frequency power may be output from the first output unit 41 to the electrodes 21 to 24 and the counter electrode plate 25, or the number of electrodes may be increased to six and a third output unit and a third temperature measurement unit may be provided. Further, in the high-frequency treatment device 2, two output units 40 and two temperature measurement units 60 may be provided, or a sub-control unit 90 for controlling the switching unit 50, the temperature measurement unit 60, etc. may be provided.

[0126] Also, the electrodes 21 to 24 are not limited to those inserted into the treatment target, and may be arranged on the skin surface of the human body, for example, to heat a relatively shallow region under the skin. Further, the number of electrodes constituting the electrode group is not particularly limited as long as it is two or more.

[0127] Also, the operations and effects shown in the above-described embodiments are merely an enumeration of the most suitable operations and effects resulting from the present invention, and the operations and effects according to the present invention are not limited thereto.

Explanation of Reference Numerals

[0128] 1, 2 High-frequency treatment devices Electrodes 21 to 24 Thermocouples 21c to 24c Operation switch 30 Output unit 40 First output unit 41 Second output unit 42 Temperature measurement unit 60 First temperature measurement unit 61 Second temperature measurement unit 62 Main control unit 80 Object to be treated 100 First voltage value E1 Second voltage value E2

Claims

1. An output unit that outputs high-frequency power, A plurality of electrodes connected to the output unit and arranged on a treatment target, A temperature measurement unit that measures the temperature around the electrodes, A control unit that performs normal output control to control the output of the output unit so that the temperature measurement value measured by the temperature measurement unit becomes equal to a control target value, An operation detection unit that detects an operation of the treatment target, and is provided with, The control unit performs output reduction control to reduce the output of the output unit more than the normal output control based on the operation detection unit detecting an operation of the treatment target. A high-frequency treatment device characterized by that.

2. In the high-frequency treatment device according to claim 1, The control unit performs the output reduction control only while the operation detection unit detects an operation of the treatment target. A high-frequency treatment device characterized by that.

3. In the high-frequency treatment device according to claim 1, The control unit performs the output reduction control for a predetermined period based on the operation detection unit detecting an operation of the treatment target. A high-frequency treatment device characterized by that.

4. In the high-frequency treatment device according to any one of claims 1 to 3, The control unit performs the normal output control even if the operation detection unit detects an operation of the treatment target when the temperature measurement value is equal to or less than a preset temperature reference value. A high-frequency treatment device characterized by that.

5. In the high-frequency treatment device according to any one of claims 1 to 4, The control unit, In the normal output control, the control target value is set to a first target value and the output of the output unit is controlled so that the temperature measurement value becomes equal to the control target value, In the output reduction control, the control target value is set to a second target value lower than the first target value, and the output of the output unit is controlled so that the temperature measurement value becomes equal to the control target value. A high-frequency treatment device characterized by this.

6. In the high-frequency treatment device according to claim 5, In the output reduction control, the control unit is configured to set the control target value to a temperature lower than the current temperature measurement value. A high-frequency treatment device characterized by this.

7. In the high-frequency treatment device according to any one of claims 1 to 6, The operation detection unit is configured to change a first voltage value and a second voltage value input to the control unit when an operation on the treatment target is received. The control unit determines whether the operation detection unit has detected an operation on the treatment target based on changes in the first voltage value and the second voltage value. A high-frequency treatment device characterized by this.

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