JPS5830063B2 - High frequency heating treatment device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement of a high-frequency heating treatment device, which is capable of properly maintaining an affected part of a living body that is heated by high-frequency energy within a required temperature range during heating. It is something to do.

By the way, when both the abnormal cell tissue that constitutes cancer or other tumor and the surrounding normal cell tissue are heated in a temperature range of 40°C or higher, only the former becomes 2 to
It is well known that temperatures can reach temperatures of around 2.5°C.

Therefore, in recent years, normal cell tissues are heated to a temperature of around 43℃, which does not cause necrosis, while being heated to a temperature of around 45℃. A method of raising temperature to the point where abnormal cell tissue collapses to death, thereby curing areas affected by cancer, etc.
It is beginning to attract attention as a so-called heating therapy (hyperthermia).

When performing such heating therapy, if the affected area is on the surface of the body, an incandescent lamp or the like may be used as the heat source, but if the affected area is deep inside the body, dielectric heating may be used. An applied high frequency heating treatment device is used.

That is, this device attaches two heating electrode bodies, which are high-frequency electrodes, to the surface of a living body that has a deep diseased area, sandwiching the diseased area from both sides, and applies high-frequency energy between the two electrode bodies. , which attempts to heat the affected area by dielectric heating.

However, the biggest problem with the above device is how to maintain the temperature of the affected area at around 45°C.

That is, if the temperature of the affected area is lower than the above-mentioned temperature range, the therapeutic effect will not be achieved, whereas if it is higher than the above temperature range, it will adversely affect the surrounding normal cell tissue.

Therefore, in order to keep the affected area within a required temperature range, it is necessary to constantly detect the temperature of the affected area.

However, estimating the temperature of the affected area by detecting the temperature of the skin near the affected area lacks accuracy.

This is because the temperature of the skin does not always maintain a constant relationship with the temperature of the affected area.

Furthermore, when detecting the temperature of the affected area, consideration must be given to the effect of high frequency energy applied to the affected area on the temperature sensor.

In other words, the high frequency energy causes the detection end of the temperature sensor to
The high-frequency electrode may locally increase the temperature in the vicinity, causing an error in the detected value of the temperature sensor, or causing damage to each circuit device in the system connected to the sensor. May cause damage.

The present invention addresses the various problems described above and provides a temperature sensor that can accurately detect the temperature of the affected area in order to properly maintain the heated affected area within a required temperature range. , and a temperature control system connected to this, the above temperature sensor is connected to the temperature control system only during the time when high frequency energy is not output, in accordance with the output interval of the high frequency output system that outputs high frequency energy intermittently. It was designed to connect to.

Hereinafter, an embodiment shown in the drawings will be described in detail.

In the figure, 1 is the main body of the high-frequency heating treatment device, which includes a high-frequency output system A and a temperature control system B.

The high frequency output system A includes a power supply circuit 3 connected to the power supply terminal 2, a control circuit 5 that intermittently outputs DC power from the power supply circuit 3 by the action of a built-in timer circuit 4,
It consists of a high-frequency generation circuit 6 that generates high-frequency energy using the DC power, and a high-frequency matching circuit 7 that matches the high-frequency energy according to the load, so that the required high-frequency energy is intermittently output from the output terminal 8.8. It has become.

On the other hand, the temperature control system B includes a switching circuit 10 connected to the signal input terminal 9, a high frequency removal circuit 11 that removes high frequency components that have leaked through the circuit, and a temperature control system based on the temperature detection signal. It consists of a temperature display circuit 12 that displays a temperature, and a temperature setting circuit 13 that sets the heating temperature of the affected area, and the switching circuit 10 inputs a temperature detection signal only during the time when high frequency energy is not output from the output terminals 8, 8. The temperature setting circuit 13 is operated by the timer circuit 4 to direct the high frequency energy from the terminal 9 to the high frequency removal circuit 11, and the temperature setting circuit 13 stops outputting high frequency energy when the detected temperature displayed by the temperature display circuit 12 exceeds the set temperature. In order to do so, the control circuit 5 is operated.

Reference numeral 14.14 denotes a heating electrode body as a high frequency electrode connected to each of the output terminals 8, 8, which heats the living body 1 through a water pad 15.15 provided individually or separately.
It is applied to the surface of the living body while sandwiching the affected area 17 located deep in the body from both sides.

Reference numeral 18 denotes a temperature sensor connected to the input terminal 9, which accurately measures the temperature of the affected area 17 in the deep part of the living body 16.
For example, a device with a needle-like detection end 19 that can reach the affected area 17 as shown in the figure, or one that can detect the temperature of the affected area 17 deep even from the surface of the living body 16 is used. What you can get will be adopted.

In the above configuration, first, the two electrode bodies 14 14 are attached to the surface as close as possible to the affected area 17 of the living body 16 via the water pads 15 so as to sandwich the affected area from both sides.
At the same time, the temperature sensor 18 is inserted into the living body 16 until the needle-shaped detection end 19 in the illustrated example reaches a depth that reaches the affected area 17.
Set it by inserting it into the

Next, after setting the temperature to be raised by heating the affected area 1γ to, for example, 45° C. in the temperature setting circuit 13,
When the control circuit 5 is operated, DC power is output from the power supply circuit 3, and based on this, the high frequency energy output from the high frequency generation circuit 6 passes through the high frequency matching circuit 1 and is sent from the output terminal 8°8 to each electrode body. 14.14.

Then, the part of the living body 16 sandwiched between the electrode bodies 14 and 14 is heated by dielectric heating based on the applied high-frequency energy, and only the temperature of the affected part 17 is higher than that of the surrounding normal cell tissue. temperature will also rise by 2 to 2.5 degrees Celsius.

The above-mentioned supply of high-frequency energy is performed intermittently, for example, at intervals of 5 seconds, by the timer circuit 4 built into the control circuit 5.

On the other hand, the temperature of the affected area 17 heated in this manner is detected by the temperature sensor 18 and inputted to the input terminal 9 as an electrical temperature detection signal.

However, during the time period when high frequency energy is being supplied to the electrode body 14.14, the energy is being supplied to the temperature sensor 1.
8 and tries to superimpose a high frequency component on the temperature detection signal.

However, the switching circuit 10 connected to the input terminal 9 is operated by the timer circuit 4 of the control circuit 5 to operate so as to pass the temperature detection signal only during the time period when high frequency energy is not output, and the high frequency removal circuit 11 operates so as to remove even a small amount of high frequency component leaking from the switching circuit 10 when the switching circuit 10 is operating so as not to pass the temperature detection signal during the time period when high frequency energy is output.

Therefore, the temperature display circuit 12 receives only the temperature detection signal that is not affected by high frequency energy, and displays the temperature of the affected area 17 accordingly.

Furthermore, the temperature setting circuit 13 compares the temperature of the affected area 11 displayed by the temperature display circuit 12 with the initial set temperature,
When the former is lower than or equal to the latter, the control circuit 5 continues to operate, and when the former exceeds the latter, the control circuit 5 outputs high frequency energy only while the former exceeds the latter. to be discontinued.

Therefore, the temperature of the affected area 17 heated by high-frequency energy is maintained at the initially set temperature, for example, within a temperature range of around 45°C, and the surrounding area consisting of normal cell tissue is
It will be maintained within a temperature range of 43°C or less.

As described above, the present invention accurately detects the temperature of an affected area that is being heated by high-frequency energy while eliminating the influence of the high-frequency energy, displays this, and at the same time supplies high-frequency energy to the affected area. According to the present invention, automatic control of the temperature of the affected area during high-frequency heating therapy can be easily and accurately achieved. This makes it possible to maintain the affected area correctly within the required temperature range during heating, and therefore allows safe and appropriate heating therapy using high-frequency energy to be applied to the affected area, such as cancer, that occurs deep within the body. It can be expected to have a positive effect.

[Brief explanation of the drawing]

The figure is a block diagram showing an embodiment of the present invention. A: High frequency output system, B: Temperature control system, 1: Main unit, 3: Power supply circuit, 4
...Timer circuit, 5...Control circuit,
6... High frequency generation circuit, 7... High frequency matching circuit, 10... Switching circuit, 11...
・High frequency removal circuit, 12...Temperature display circuit, 1
3... Temperature setting circuit, 14... Heating electrode body, 16... Living body, 1γ... Affected area, 18... Temperature. Sensor 19...Detection end.

Claims (1)

[Claims] 1. A high-frequency heating treatment configured to intermittently supply high-frequency energy to a heating electrode body attached to the surface of a living body so as to sandwich the affected area located deep within the living body from both sides. The apparatus includes a temperature sensor capable of accurately detecting the temperature of the affected area, and a high frequency output system so as to pass the temperature detection signal from the sensor only during a time period when high frequency energy is not supplied to the heating electrode body. a switching circuit operated by the control circuit; a high frequency removal circuit that removes high frequency components leaking through the switching circuit; a temperature display circuit that displays the temperature of the affected area based on the temperature detection signal; and a temperature setting circuit that operates the control circuit to set a heating temperature and to stop outputting high frequency energy when the detected temperature displayed by the temperature display circuit exceeds the set temperature. Features of high frequency heating treatment device. The high-frequency heating treatment device according to claim 1, characterized in that a temperature sensor is used that has a needle-like detection end that can reach an affected area located deep within a living body.