JPS6144035B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device that locally heats tissue within a body cavity for treatment.

Recently, there has been a report of a case in which a patient with early symptoms of cancer was cured of cancer after experiencing a high fever of around 40°C, and it is assumed that cancer cells are sensitive to heat of around 40°C. Therefore, it is thought that locally heating cancer cells at a temperature of around 40°C may be effective.

Incidentally, devices for locally heating living tissue have already been known, and various attempts have been made to treat the above-mentioned cancers. However, since the conventional device inserts an electric heating element into the body and applies electricity to the heating element to promote heat generation, there is a great danger to the human body due to the current flowing inside the body. Further, electric heating elements are difficult to miniaturize and cause great pain to the patient when inserted into a body cavity, so they are not preferred for long-term heating treatments. Furthermore, it is difficult to guide such a heating element close to the affected area, and there is also the problem that it is difficult to reliably and locally heat the affected area to be treated.

This invention was made based on the above circumstances, and its purpose is to use a magnetic field to generate heat in a solid clamping body inserted into a body cavity using an endoscope, and to generate heat using this magnetic field. By fixing the solid clamping body in contact with the affected area, the member to be inserted into the body cavity can be made smaller, causing less pain to the patient when inserted into the body cavity, and the affected area can be reliably heated for a long time, making it highly safe. It is an object of the present invention to provide a local heating device for tissues within a body cavity.

An embodiment of the present invention will be described below with reference to FIG.

In the figure, 1 represents a human body, and 2 represents a body cavity, for example, the stomach, on the wall of which there is a cancer-affected area 3. 4 is a solid clamping body inserted into the body cavity 2. This solid clamping body 4 is constructed by connecting a pair of heating element constituent members 4a and 4b made of magnetic material by means such as screwing together, and generates heat by itself by an alternating magnetic field, which will be described later. It's becoming like that. A temperature sensor 5 is housed within this solid holding body 4,
This temperature sensor 5 detects the temperature of the solid clamping body 4 and converts this detected temperature into an electrical signal. The temperature sensor 5 is connected to an insulated lead wire 6, and the lead wire 6 is led out of the body through a body cavity tube 7.
Note that 8 and 9 are sealing materials that protect the temperature sensor 5 in a liquid-tight manner. Further, reference numeral 10 denotes an alternating magnetic field generating device installed outside the body, and this alternating magnetic field generating device 10 is provided at a position facing the affected area 3. This alternating magnetic field generating device 10 is composed of, for example, a magnetic field generating coil, and is connected to a control device 11. The control device 11 automatically maintains the temperature of the solid clamping body 4 at a set value, and includes, for example, a comparison circuit 12, a setting signal generator 13, and a control circuit 14. This control circuit 14 is connected to a circuit 14 .
is connected to an AC power source 15. Comparison circuit 12
is connected to the temperature sensor 5 via a lead wire 6, compares the signal sent from the temperature sensor 5 with a standard signal generated from the setting signal generator 13, and sends the comparison signal to the control circuit 14. It is now being sent to Then, the control circuit 14 converts the electrical characteristics sent from the AC power supply 15 according to the comparison signal to generate the alternating magnetic field generator 10.
It is intended to be supplied to Note that the electrical characteristic to be converted is to change the output of the alternating magnetic field generator 10, so the frequency or current value is controlled. Further, the setting signal generator 13 can be variably adjusted so that a desired temperature can be freely selected.

The operation of the embodiment with such a configuration will be explained.

When current is applied to the alternating magnetic field generator 10 via the AC power supply 15 and the control device 11, the magnetic field generator 10 generates a magnetic field. This magnetic field passes through the human body and acts on the solid clamping body 4 in the body cavity 2, and the solid clamping body 4 receives the magnetic force and causes the magnetic field generating device 10 to act on the solid clamping body 4.
It is attracted to the side. Since the magnetic field generating device 10 is directly facing the cancerous area 3, the solid clamping body 4 is pressed against the cancerous area 3 by the magnetic force and stopped there. Since the current supplied to the magnetic field generator 10 is alternating current, the magnetic field generated by the magnetic field generator 10 becomes an alternating magnetic field, and therefore the solid clamping body 4 is heated by hysteresis loss and eddy current loss. occurs. This heat is transferred to the affected area 3, so that the affected area 3 is being treated with heat.

At this time, the temperature of the solid sandwiching body 4 is measured by the temperature sensor 5.
An electrical signal corresponding to the temperature is sent to the comparison circuit 12 of the control device 11. When the temperature of the solid clamping body 4 differs from the set temperature, the comparator circuit 12 compares the signal sent from the temperature sensor 5 with the standard signal sent from the set signal generator 13. , and sends a command signal corresponding to the comparison difference to the control circuit 14. The control circuit 14 converts electrical characteristics, such as frequency or current value, sent from the AC power supply 15 in response to the command signal, and supplies the converted frequency or current value to the alternating magnetic field generator 10. Therefore, since the output of the alternating magnetic field generated by the alternating magnetic field generator 10 changes, the amount of heat generated by the solid clamping body 4 is changed, and the temperature of the solid clamping body 4 is automatically adjusted to the set temperature. I will keep it.

According to such a local heating device, since the heating element 4 generates heat due to hysteresis loss and eddy current loss caused by an alternating magnetic field, there is no need to supply electricity to the solid clamping body 4 itself, and therefore no current is generated in the body. It is extremely safe because there is no need to pass through it. Also,
Since this solid clamping body 4 is attracted to the affected area 3 by the magnetic field, it can maintain stable and reliable contact with the affected area 3 for a long time, and not only does it require no special contact means, but also can be heated. Since the affected area 3 is pressed against the affected area 3 in the same state, the affected area 3 can be heated intensively. In addition, the solid clamping body 4 is simply made of a magnetic material and does not include a built-in heater, so it can be made compact, and it can be easily inserted into the body cavity 2, causing less pain to the patient. be. When inserting into the body cavity 2, an endoscope is used, and the heating element 4 can be introduced into the affected area 3 under direct vision with the endoscope, and under X-ray fluoroscopy. The heating element 4 can also be brought close to the affected area 3 by pulling or pushing the lead wire 6.

The alternating magnetic field generator is shown in Figures 2 and 3.
It can also be configured as shown in the figure. That is, 20 is a flexible cylinder made of an electrically insulating material, and an alternating magnetic field generating coil 21 is embedded in this cylinder 20 in an insulating manner. According to such an alternating magnetic field generating device 10, a human body is inserted into the cylindrical body 20 and wound around the body, the alternating magnetic field generating coil 21 is positioned so as to directly face the affected area as shown in FIG. When the patient lies down, the alternating magnetic field generating coil 21 does not move, making it easy to handle and allowing the patient to concentrate on treatment in a comfortable position.

Note that the temperature sensor 5 is not necessarily limited to being provided inside the solid clamping body 4, and may be configured to detect the temperature of the surface of the solid clamping body 4 or the surface of the affected area.

The present invention described in detail above involves inserting a solid clamping body made of a magnetic material that generates heat due to changes in a magnetic field to a predetermined position in a body cavity using an endoscope, and generating an alternating magnetic field provided outside the body. The alternating magnetic field generated by the solid clamping body is made to generate heat due to hysteresis loss and eddy current loss, and the magnetic field causes the affected area to be clamped between the solid clamping bodies. It is safe because there is no need to directly pass current through it, and it can be inserted and fixed into the affected area accurately. Since the solid clamping body can be reliably brought into contact with the affected area under pressure for a long period of time, the targeted local heating of the affected area can be performed effectively and with high precision.
In addition, since the solid clamping body generates heat due to hysteresis loss and eddy current loss, a special heater is not required.Therefore, the structure is not only simple but also compact, making it easy to insert into body cavities. can be performed easily and causes less pain to the patient. Since the temperature of the solid sandwiched body is automatically maintained at a preset temperature using a temperature sensor and a control device, it has the advantage of being easy to handle.

[Brief explanation of the drawing]

Fig. 1 is a schematic configuration diagram showing an embodiment of the present invention, Figs. 2 and 3 show modified examples, Fig. 2 is a usage state diagram, and Fig. 3 is a partial cross section of an alternating magnetic field generator. FIG. 1...human body, 2...body cavity, 3...affected area, 4...
Solid clamping body, 5...Temperature sensor, 10, 10'
... Alternating magnetic field generator, 11... Control device.

Claims (1)

[Claims] 1. A solid clamping body made of a magnetic material that can generate heat due to changes in the magnetic field and inserted into the body cavity to the affected area using an endoscope; an alternating magnetic field generating device that fixes the solid clamping body to the affected area by applying a magnetic field and generates heat at the same time as pressing the solid clamping body against the affected area; a temperature sensor that detects the temperature of the heating element or its vicinity; A local heating device for tissue within a body cavity, comprising a control device that controls the output of the alternating magnetic field generator according to the temperature detected by the temperature sensor.