JPH06319814A - Microwave warm therapeutic device - Google Patents

Abstract

PURPOSE:To enhance the safety by controlling an output of the microwave by detecting a dangerous temperature area by a burn preventive temperature sensor for detecting a temperature of the part being different from a heating center position, and executing control so as to break away from the dangerous temperature area to suspend the radiation of a microwave in the case other temperature than that of a target part rises. CONSTITUTION:A microwave is radiated from a microwave oscillating part 12, received by an antenna part 2 and heating is started, and when a temperature of a heating part detected by a heating control temperature sensor 3 reaches a target temperature, an output of a microwave output control part 11 becomes OFF, the radiation is stopped and the temperature of the heating part falls. On the other hand, when the temperature of the heating part becomes lower than the target temperature, the output of the microwave output control part 11 becomes ON and it is heated. While the temperature control of the heating part is being executed, a temperature of a burn preventive temperature sensor 4 and a second dangerous temperature are compared by a comparing part 13, and when the temperature becomes above a second dangerous temperature, an output of the comparing part 13 becomes an L level and the output of the microwave output control part 11 is turned off.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention irradiates microwaves,
The present invention relates to a microwave thermotherapy device that heats a living tissue to a target temperature for treatment.

[0002]

2. Description of the Related Art A heating device for irradiating a target site with microwaves for heating treatment is widely known in Japanese Utility Model Publication No. 63-182759 and Japanese Patent Publication No. 2-41976. In such a device, the applicator is inserted into the body cavity,
A microwave is radiated from an antenna part built in the applicator to heat a target site, thereby performing thermal treatment of the affected part.

By the way, the temperature of the surface of the living tissue in contact with the applicator inserted into the body cavity is monitored by a temperature sensor built in the applicator, and the temperature of the surface of the living tissue detected by this temperature sensor is set to a set temperature. The microwave output is controlled so that the target area is heated.

For example, when inserting an applicator into the urethra for hyperthermia treatment of prostatic hypertrophy, the site where the temperature is monitored by the temperature sensor is the urethral mucosal surface with which the applicator is in contact. Therefore, in order to prevent the burn of the mucous membrane of the urethra and to warm the inside of the prostate higher than the mucous membrane surface of the urethra, cooling water is circulated in the applicator for the urethra.

By increasing the reflux amount of the cooling water or raising the set temperature, the inside of the prostate can be raised to a high temperature and the effect of the heating treatment can be promoted.

[0006]

However, when a burn is caused around the prostate, there is an inconvenient place. Therefore, when the temperature around the prostate becomes high, it is necessary to stop the microwave radiation and interrupt the thermotherapy.

The present invention has been made in view of the above points, and an object thereof is a microwave thermotherapy apparatus for irradiating a microwave to heat a living tissue to a target temperature for treatment. An object of the present invention is to provide a microwave thermotherapy device with high safety by interrupting microwave radiation when the temperature of the site rises.

[0008]

According to the present invention, there is provided a microwave oscillating section for outputting a microwave, a microwave antenna section for radiating the microwave, and a temperature control section for controlling heating to a target set temperature. In the microwave thermotherapy apparatus having: a heating temperature sensor for detecting the temperature at the heating center position of the inner wall of the body cavity, and at least one burn-prevention temperature sensor arranged at a position different from the heating temperature sensor, The dangerous temperature detecting means for detecting that the measured temperature of the burn preventing temperature sensor is in the dangerous temperature range, and the measured temperature of the burn preventing temperature sensor is in the dangerous temperature range by the dangerous temperature detecting means. When it is detected, the microwave output from the microwave oscillating unit is controlled so that the temperature measured by the temperature sensor for preventing burns is separated from the dangerous temperature range. Gosuru and a microwave output control means.

[0009]

A temperature sensor for preventing burns, which detects at least one temperature different from the center of heating of the inner wall of the body cavity, is provided.
When the dangerous temperature range is detected by the burn preventing temperature sensor, the microwave output is controlled so that the measured temperature of the burn preventing temperature sensor is deviated from the dangerous temperature range.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS. 1 is a block diagram showing the entire microwave thermotherapy apparatus, FIG. 2 is a block diagram showing the detailed configuration of a target temperature setting unit, and FIG. 3 is a sectional view showing the main part of a living body showing the insertion position of an applicator. 4 is a sectional view of a main part of the living body showing the position of the temperature sensor, FIGS. 5 and 6 are timing charts for explaining the operation, and FIG.

In FIG. 1, reference numeral 1 denotes a built-in antenna section 2 for radiating microwaves, a temperature sensor 3 for heating control, and a temperature sensor 4 for preventing burns at a position different from the temperature sensor 3 for heating control. It is an applicator.

A cooling system 5 is connected to the applicator 1, and cooling water from the cooling system 5 is returned to the applicator 1. A first temperature measuring unit 6 is connected to the heating control temperature sensor 3, and a second temperature measuring unit 7 is connected to the burn preventing temperature sensor 4. The first temperature measuring unit 6 amplifies the temperature signal detected by the heating control temperature sensor 3 and outputs it to the temperature control unit 8.

The temperature control unit 8 has a first target temperature (for example, 39 ° C.) of the heating unit set by the target temperature setting unit 9 and the first temperature.
The first dangerous temperature (for example, 45 ° C.) set by the dangerous temperature setting unit 10 is input, and the temperature of the heating unit and the target temperature input via the first temperature measuring unit 6 The comparison result of the temperature and the first dangerous temperature is output to the microwave output control unit 11. The microwave output control section 11 outputs an output control signal to the microwave oscillating section 12 that radiates microwaves to the antenna section 2 of the applicator 1. The microwave oscillating unit 12 oscillates the microwave when the ON signal is input as the output control signal from the microwave output control unit 11, and stops the microwave oscillation when the OFF signal is input.

By the way, the temperature of the burn preventing portion which is the output of the second temperature measuring unit 7 is compared with the second dangerous temperature (for example, 42 ° C.) set by the second dangerous temperature setting unit 14, and the comparison result is obtained. It is output to the microwave output control unit 11 described above.

Further, the comparison unit 13 is connected to a notification unit 15 for giving an alarm by light or sound. Next, a detailed configuration of the temperature controller 8 will be described with reference to FIG.
The temperature of the heating unit output from the first temperature measuring unit 6 and the first dangerous temperature set by the first dangerous temperature setting unit 10 are the first comparing unit 1
6 and the first comparison unit 10 outputs an H level signal if “temperature of heating unit <first dangerous temperature”.

The temperature of the heating section output from the first temperature measuring section 6 and the target temperature set by the target temperature setting section 9 are the second
It is input to the comparison unit 17, and the second comparison unit 17 outputs an H level signal if “temperature of the heating unit <target temperature”.

Further, the first comparing section 16 and the second comparing section 1
The output of 7 is input to the AND circuit 18. The output of the AND circuit 18 changes as shown in FIG. The output of the AND circuit 18 is output to the microwave controller 11.

Next, the operation of the first embodiment of the present invention constructed as above will be described. First, as shown in FIG. 3, the applicator 1 is inserted into the urethra 19 such that the tip thereof reaches the bladder 20, and the balloon 21 at the tip is positioned and fixed so that the heating center is the prostate 22. As a result, as shown in FIG. 4, the temperature sensor 3 for heating control positions the temperature of the heating center of the mucous membrane surface of the urethra, and the temperature sensor 4 for preventing burns is positioned on the external sphincter muscle 23 which is desired to prevent burns.

First, the ON signal is output from the microwave output controller 11 to the microwave oscillator 12,
Microwaves are radiated from the microwave oscillating unit 12, and the microwaves are received by the antenna unit 2 to start heating.

When the heating is started, the temperature of the heating control temperature sensor 3 and the temperature of the burn preventing temperature sensor 4 rise as shown in FIG. Then, when the temperature of the heating unit detected by the heating control temperature sensor 3 reaches the target temperature (39 ° C.), the output of the second comparing unit 17 in FIG. 2 becomes L level, so the temperature control unit 8 Output becomes L level, and the output of the microwave output control unit 11 is turned off. Therefore, the microwave emission from the microwave oscillating unit 12 is stopped, and the temperature of the heating unit is lowered.

When the temperature of the heating section detected by the heating control temperature sensor 3 falls below the target temperature (39 ° C.),
Since the H level signal is output again from the second comparison section 17, the output of the temperature control section 8 becomes the H level signal and the output of the microwave output control section 11 is turned on. Therefore, the microwave oscillating unit 12 starts emitting microwaves again to heat the microwaves. As described above, the microwave output control unit 11 is on / off controlled as shown in FIG. 5 so that the heating unit reaches the target temperature (39 ° C.).

By the way, while the temperature control of the heating section is being performed in this way, the temperature of the burn preventing temperature sensor 4 is compared with the second dangerous temperature in the comparing section 13.
If the temperature of the burn preventing temperature sensor 4 is lower than the second dangerous temperature, the output of the comparing unit 13 is at the H level, but if the temperature of the burn preventing temperature sensor 4 becomes equal to or higher than the second dangerous temperature, the comparing unit 13 Since the output of 13 is at the L level, the output of the microwave output control unit 11 is turned off a minute after the start of heating when the temperature of the temperature sensor 4 for preventing burns becomes the second dangerous temperature. Therefore, when the temperature of the temperature sensor 4 for preventing burns reaches the second dangerous temperature, the radiation of the microwave radiated from the microwave oscillator 12 is stopped and the heating is stopped.
Further, since the output (L level) of the comparison unit 13 is output to the notification unit 15, the notification unit 15 notifies the abnormal state by sound or light.

In this way, the temperature of the part to be heated is detected by the temperature sensor 3 for heating control, and the temperature of the part to be heated is controlled so as to reach the target temperature. With the temperature sensor 4 for preventing burns provided, the temperature of the part for preventing burns is detected, and when the temperature of the part reaches the second dangerous temperature, the heating is stopped. Damage to the tissue due to burns can be prevented in advance.

In the above-mentioned operation, the output of the first comparison section 16 is H level.
Although the description has been made on the premise that the temperature is the level (that is, the temperature of the heating portion detected by the heating control temperature sensor 3 is lower than the first dangerous temperature), as shown in FIG. After b minutes from the start of heating when the temperature of the heating unit detected by the temperature sensor 3 becomes the first dangerous temperature (for example, 45 ° C.),
Since the output of the first comparison unit 16 is at the L level, the output of the microwave output control unit 11 is turned off, and the emission of microwaves emitted from the microwave oscillation unit 12 is stopped.

In this way, the second
Even when the comparison unit 17 keeps outputting the L level, the first comparison unit 16 sets the L level when the temperature of the heating unit detected by the heating control temperature sensor 3 reaches the first dangerous temperature. Since the data is output, it is possible to perform fail-safe when a failure occurs in the second comparing section 17.

Next, a second embodiment of the present invention will be described with reference to FIGS. 8 and 9. In the first embodiment, only one temperature sensor for preventing burns is provided in the applicator 1, but in the second embodiment, the first temperature sensor for preventing burns 24 is provided in the applicator 1. In addition to the provision, a second burn preventing temperature sensor 25 is provided outside the applicator 1. The first burn preventing temperature sensor 24 has the same function as the burn preventing temperature sensor 4 of the first embodiment.
When the temperature detected by the temperature sensor 24 for preventing burns reaches the second dangerous temperature, the microwave radiation is stopped and the heating is stopped. Further, when the temperature detected by the second temperature sensor 25 for preventing burns reaches the third dangerous temperature, the microwave radiation is stopped.

FIG. 8 is a block diagram showing the configuration of the second embodiment of the present invention, and FIG. 9 is the insertion position of the applicator 1 and the temperature sensor 3 for controlling heating, the first temperature sensor 24 for preventing burns, and the second temperature sensor 24. It is a principal part sectional view of a living body which shows the position of the temperature sensor 25 for a burn prevention.

In the second embodiment, the same parts as those in the first embodiment are designated by the same reference numerals, and detailed description thereof will be omitted. The second temperature measuring unit 7 is connected to the first burn preventing temperature sensor 24. The temperature of the burn injury prevention portion, which is the output of the second temperature measuring unit 7, is set to the second dangerous temperature setting unit 29, which is the second temperature.
The dangerous temperature (for example, 42 ° C.) is compared with the first comparing unit 26, and the comparison result is the microwave output stopping unit 31 described above.
Is output to. The first comparing section 26 outputs an H level signal when the temperature of the burn preventing portion detected by the first burn preventing temperature sensor 24 is lower than the second dangerous temperature.

A third temperature measuring unit 27 is connected to the second temperature sensor 25 for preventing burns. The temperature of the burn prevention part which is the output of the third temperature measuring unit 27 is compared with the third dangerous temperature (for example, 43 ° C.) set by the third dangerous temperature setting unit 30 by the second comparing unit 28, and the comparison result is obtained. Is output to the microwave output stop unit 31 described above. The second comparing section 28 outputs an H level signal when the temperature of the burn preventing portion detected by the second burn preventing temperature sensor 25 is lower than the third dangerous temperature.

The microwave output stopping unit 31 is the first comparing unit 2.
6 and the output of the second comparison unit 28 are ANDed, and the output is output to the microwave output control unit 11 and the notification unit 15. When the output of the microwave output stop unit 31 becomes L level, the notification unit 15 gives an alarm by light or sound.

Next, the operation of the second embodiment of the present invention constructed as above will be described. First, as in the case of the first embodiment, as shown in FIG. 9, the applicator 1 is inserted into the urethra 19 so that its tip reaches the bladder 20, and the balloon 21 at the tip of the applicator 1 makes the heating center the prostate part 22. Position it and fix it in place. As a result, the temperature sensor 3 for heating control positions the temperature of the heating center of the mucous membrane surface of the urethra, and the first temperature sensor 24 for burn prevention positions the external sphincter muscle 23 which is desired to prevent burn injury.

A second burn prevention temperature sensor 25 is attached to the surface of a balloon 34 inserted in the rectum 32 to prevent burns of the rectal mucosa. First, the microwave output control unit 11 outputs an ON signal to the microwave oscillating unit 12, whereby the microwave is radiated from the microwave oscillating unit 12, and the microwave is received by the antenna unit 2 to heat the microwave. Be started.

When the heating is started, the temperatures of the heating control temperature sensor 3, the first burn preventing temperature sensor 24, and the second burn preventing temperature sensor 25 rise. Then, when the temperature of the heating unit detected by the heating control temperature sensor 3 reaches the target temperature (39 ° C.), the output of the second comparing unit 17 in FIG. 2 becomes L level, so the temperature control unit 8 Output becomes L level, and the output of the microwave output control unit 11 is turned off. Therefore, the microwave emission from the microwave oscillating unit 12 is stopped, and the temperature of the heating unit is lowered.

When the temperature of the heating section detected by the heating control temperature sensor 3 falls below the target temperature (39 ° C.),
Since the H level signal is output again from the second comparison section 17, the output of the temperature control section 8 becomes the H level signal and the output of the microwave output control section 11 is turned on. Therefore, the microwave oscillating unit 12 starts emitting microwaves again to heat the microwaves. As described above, the microwave output control unit 11 is on / off controlled as shown in FIG. 5 so that the heating unit reaches the target temperature (39 ° C.).

The temperature near the external sphincter muscle 23 detected by the first temperature sensor 24 for preventing burns is the second dangerous temperature (4
2 ° C) or higher or the temperature of the rectal mucosa detected by the second temperature sensor 25 for preventing burns is the third dangerous temperature (43
(° C) or higher, the output of the microwave output stop unit 31 is turned off. Since the output is output to the microwave output control unit 11 and the notification unit 15, an off signal is output to the microwave oscillation unit 12, the microwave output from the microwave oscillation unit 12 is stopped, and the heating is stopped. To be done. Further, the notification section 15 gives an alarm by light or sound.

As described above, in the second embodiment, the first burn sensor temperature sensor 24 is built in the applicator 1, and
Since the second temperature sensor 25 for preventing burns is provided in addition to the applicator 1, the temperature in the vicinity of the external sphincter muscle 23 detected by the first temperature sensor 24 for preventing burns during the heating treatment of the heating portion is the first. When the temperature reaches the second dangerous temperature or the temperature of the rectal mucosa detected by the second temperature sensor 25 for preventing burns reaches the third dangerous temperature, the microwave radiation is stopped and an alarm is given. It is possible to prevent burns of parts other than the part.

Next, a third embodiment of the present invention will be described with reference to FIG.
Will be described with reference to. In the above-described second embodiment, the first burn preventing temperature sensor 24 is built in the applicator 1 and the second burn preventing temperature sensor 25 is provided outside the applicator 1. In the embodiment, applicator 1
In addition to the first and second burn preventing temperature sensors 24, 25
Is provided. Furthermore, in the above-described second embodiment, the first to third dangerous temperatures are set to the first dangerous temperature setting unit 10, the second dangerous temperature setting unit 29, and the third dangerous temperature, respectively.
The dangerous temperature setting unit 30 is set, but this third
In the embodiment, a dangerous temperature setting unit 35 is provided, and the dangerous temperature setting unit 35 sets all the first to third dangerous temperatures. That is, the dangerous temperature setting unit 3
The first dangerous temperature set in 5 is output to the first comparing unit 16 (FIG. 2) in the temperature control unit 8, and the second dangerous temperature set in the dangerous temperature setting unit 35 is output to the first comparing unit 26. Then, the third dangerous temperature set by the dangerous temperature setting unit 35 is output to the second comparing unit 28.

Next, the operation of the third embodiment of the present invention constructed as above will be described. The operation of the third embodiment is the same as that of the second embodiment except that the first burn-prevention temperature sensor 24 is built in the applicator 1, and therefore detailed operation will be omitted.

As described above, since the first and second temperature sensors for preventing burns 24 and 25 are provided outside the applicator 1, the temperatures of the two parts apart from the applicator 1 are detected. Therefore, it is possible to prevent the burn of the part in advance.

Next, a fourth embodiment of the present invention will be described with reference to FIG.
Will be described with reference to. FIG. 11 is a block diagram showing the configuration of the fourth exemplary embodiment of the present invention. In the above-described first embodiment, the target temperature is set by the target temperature setting unit 9, the first dangerous temperature is set by the first dangerous temperature setting unit 10,
Although the second dangerous temperature is separately set by the second dangerous temperature setting unit 14, in the fourth embodiment, the target temperature is set by the target temperature setting unit 36, and the first dangerous temperature is the first dangerous temperature. The setting unit 37 sets the second dangerous temperature according to the target temperature, and the second dangerous temperature setting unit 38 sets the second dangerous temperature according to the target temperature.

In FIG. 11, the same parts as those in FIG. 1 are designated by the same reference numerals, and detailed description thereof will be omitted. Figure 1
In 1, the reference numeral 36 is a target temperature setting unit that sets a target temperature. The target temperatures set by the target temperature setting unit 36 are input to the temperature control unit 8, the first dangerous temperature setting unit 37, and the second dangerous temperature setting unit 38, respectively.

Next, the operation of the fourth embodiment will be described. In the fourth embodiment, when the target temperature is set by the target temperature setting unit 36, the first dangerous temperature and the second dangerous temperature are linked with the target temperature, and the first dangerous temperature setting unit 37 and the second dangerous temperature setting are performed. The operation is the same as that of the first embodiment described above except that it is set by the unit 38, and therefore its detailed operation will be omitted.

As described above, according to the fourth embodiment,
The temperature sensor for heating control detects the temperature of the part to be heated, controls the temperature of the part to be heated to a target temperature, and provides a temperature sensor for preventing burns provided in parts other than the part to be heated. In 4, the temperature of the part that prevents the burn is detected, and when the temperature of the part reaches the second dangerous temperature, the heating is stopped, so that the damage to the tissue of the part other than the heating part due to the burn is caused in advance. Can be prevented. Moreover, since the first dangerous temperature and the second dangerous temperature are automatically set in association with the target temperature set by the target temperature setting unit 36, the first and second dangerous temperatures can be set accurately. It can be carried out.

Next, FIG. 12 shows the fifth embodiment of the present invention.
It will be described with reference to FIGS. FIG. 12 shows the fifth aspect of the present invention.
13 is a block diagram showing the configuration of the embodiment, FIG. 13 is a diagram showing the relationship between the target temperature and the first dangerous temperature, FIG. 14 is a circuit diagram for setting the slope between the first dangerous temperature and the target temperature, and FIG. 15 is FIG. 6 is a diagram showing a relationship between an input voltage Vin and an output voltage Vout in the circuit diagram of FIG.

In the above-described first embodiment, the target temperature is set by the target temperature setting unit 9, the first dangerous temperature is set by the first dangerous temperature setting unit 10, and the second dangerous temperature is set by the second dangerous temperature setting. Although they are separately set by the parts 14, in the fifth embodiment, the target temperature setting part 3 is set.
The target temperature is set at 6, and the first dangerous temperature is set in the first dangerous temperature setting unit 37 according to the target temperature. The second dangerous temperature is set by the second dangerous temperature setting unit 38 as in the first embodiment.

In FIG. 12, the same parts as those in FIG. 1 are designated by the same reference numerals, and detailed description thereof will be omitted. Figure 1
In 2, the reference numeral 36 is a target temperature setting unit that sets a target temperature. The target temperature set by the target temperature setting unit 36 is output to the second comparing unit 17 in the temperature control unit 8 and the first dangerous temperature setting unit 37.

The first dangerous temperature setting unit 37 sets the first dangerous temperature in association with the target temperature in the relationship shown in FIG. Specifically, a voltage corresponding to the target temperature is input to the input voltage Vin of the circuit as shown in FIG.
A voltage corresponding to the first dangerous temperature is output from the output voltage Vout (the relationship between the input voltage Vin and the output voltage Vout is shown in FIG. 15).

In FIG. 14, resistors R and R'are connected in series between Vcc and the ground, and the input voltage Vin is input to the connection point between the resistors R and R'via a capacitor and a resistor. Has been done. Further, the output voltage Vout is taken out from the connection point between the resistors R and R '.

Next, the operation of the fifth embodiment will be described. In the fifth embodiment, when the target temperature is set by the target temperature setting unit 36, the first dangerous temperature is set by the first dangerous temperature setting unit 37 in conjunction with the target temperature, and the first embodiment described above is performed. Since it is the same as the example, its detailed operation is omitted. The second dangerous temperature is set by the second dangerous temperature setting unit 38 as in the first embodiment.

As described above, according to the fifth embodiment,
The temperature sensor for heating control detects the temperature of the part to be heated, controls the temperature of the part to be heated to a target temperature, and provides a temperature sensor for preventing burns provided in parts other than the part to be heated. In 4, the temperature of the part that prevents the burn is detected, and when the temperature of the part reaches the second dangerous temperature, the heating is stopped, so that the damage to the tissue of the part other than the heating part due to the burn is caused in advance. Can be prevented. Moreover, since the first dangerous temperature is automatically set in association with the target temperature set by the target temperature setting unit 36, the first dangerous temperature can be set accurately.

In the fifth embodiment, the first dangerous temperature is set to be linked to the target temperature, but the second dangerous temperature is linked to the target temperature instead of the first dangerous temperature. It may be set by setting. In this case, the first dangerous temperature is set by the first dangerous temperature setting unit 37,
The signal from the target temperature setting unit 36 is input to the second dangerous temperature setting unit 38, and the second dangerous temperature setting unit 38 is configured to input the signal shown in FIG.
A circuit similar to that of 4 is provided, and the second
The dangerous temperature may be set in conjunction with each other.

Further, when a plurality of temperature sensors for preventing burns are provided, the dangerous temperature for one of the temperature sensors for preventing burns can be set in association with the target temperature as in the fifth embodiment. can do.

In the above-described embodiment, one or two temperature sensors for preventing burns are provided in a portion other than the inside of the applicator 1, but the number is not limited to this, and a plurality of temperature sensors for preventing burns may be provided. It may be provided.

Further, in any of the above-described embodiments, when the microwave output control section 11 receives the L level signal, the microwave output control section 11 turns off the output control signal, and the microwave oscillation section 12 outputs the signal. Although the microwave radiation is stopped, the microwave output may be reduced.

[0055]

As described in detail above, according to the present invention, in a microwave thermotherapy apparatus for irradiating a microwave to heat a living tissue to a target temperature for treatment, the temperature of a site other than the target site is measured. When the temperature rises, the microwave radiation is interrupted, so that the microwave thermotherapy device with high safety can be provided.

[Brief description of drawings]

FIG. 1 is a block diagram showing an entire microwave thermotherapy apparatus according to a first embodiment of the present invention.

FIG. 2 is a block diagram showing a detailed configuration of a target temperature setting unit of the embodiment.

FIG. 3 is a cross-sectional view of the main part of the living body showing the insertion position of the applicator of the same embodiment.

FIG. 4 is a cross-sectional view of a main part of a living body for showing the position of the temperature sensor of the embodiment.

FIG. 5 is a timing chart for explaining the operation of the embodiment.

FIG. 6 is a timing chart for explaining the operation of the embodiment.

FIG. 7 is a diagram showing an output logic level of an AND circuit according to the same embodiment.

FIG. 8 is a block diagram showing the configuration of a second embodiment of the present invention.

FIG. 9 is a cross-sectional view of a main part of a living body showing the insertion position of the applicator and the position of a heating control temperature sensor, a first burn preventing temperature sensor, and a second burn preventing temperature sensor of the embodiment.

FIG. 10 is a block diagram showing the configuration of a third embodiment of the present invention.

FIG. 11 is a block diagram showing the configuration of a fourth embodiment of the present invention.

FIG. 12 is a block diagram showing the configuration of a fifth embodiment of the present invention.

FIG. 13 is a diagram showing a relationship between a target temperature and a first dangerous temperature according to the embodiment.

FIG. 14 is a circuit diagram for setting the slope between the first dangerous temperature and the target temperature in the embodiment.

15 is a diagram showing the relationship between the input voltage Vin and the output voltage Vout in the circuit diagram of FIG. 14 of the same embodiment.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Applicator, 2 ... Antenna part, 3 ... Temperature sensor for heating control, 4 ... Temperature sensor for preventing burns, 5 ... Cooling system, 6
... 1st temperature measurement part, 7 ... 2nd temperature measurement part, 8 ... Temperature control part, 9 ...
Target temperature setting unit, 10 ... First dangerous temperature setting unit, 11 ... Microwave output control unit, 12 ... Microwave oscillation unit, 13 ...
Comparison unit, 14 ... Second dangerous temperature setting unit, 15 ... Notification unit, 1
6 ... 1st comparison part, 17 ... 2nd comparison part, 18 ... AND circuit, 19 ... Urethra, 20 ... Bladder, 21 ... Balloon, 22 ...
Prostate part, 23 ... External sphincter muscle, 24 ... First burn preventing temperature sensor, 25 ... Second burn preventing temperature sensor.

Claims (1)

[Claims] 1. A microwave thermotherapy device having a microwave oscillating section for outputting microwaves, a microwave antenna section for radiating microwaves, and a temperature control section for controlling heating to a target set temperature. In, a heating temperature sensor for detecting a temperature at a heating center position of an inner wall of a body cavity, at least one burn-prevention temperature sensor arranged at a position different from the heating temperature sensor, and a burn-prevention temperature sensor Dangerous temperature detecting means for detecting that the measured temperature is in the dangerous temperature range, and when the dangerous temperature detecting means detects that the measured temperature of the burn-prevention temperature sensor is in the dangerous temperature range, A microwave output for controlling the output of the microwave output from the microwave oscillating unit so that the temperature measured by the temperature sensor for preventing burns is separated from the dangerous temperature range. Microwave thermotherapy treatment device being characterized in that a control means.