JPH0241971B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an intracavity high-frequency heating electrode device, and more particularly to a high-frequency heating electrode device for intracavity use, which can be applied to thermotherapy for tumors, etc. It concerns a heating electrode device.

[Prior Art] High-frequency thermotherapy is known in which treatment is performed by heating the affected area, taking advantage of the fact that cancer cells and the like are more susceptible to heat than normal cells.

Conventionally, as a high-frequency thermotherapy device, a pair of electrodes are placed facing each other on the surface of a living body, and a metal needle or the like is placed at the target heating site within the living body, and the electric field between the opposing electrodes is strengthened near the metal needle. As a result, there was a method in which local heating was performed at a target heating site near the metal needle.

Although this device is effective in concentrating the electric field on the target site, it is not necessarily preferable because it requires a surgical procedure to install and remove the metal needle, etc., and it causes pain to the patient.

In order to solve this problem, one electrode of the pair of electrodes is configured as an intraluminal electrode device that can be placed in and out of the lumen near the target heating site, and It has also been proposed that an electrode device for use in radio waves is formed of a high-frequency electrode, a bag-like body made of a stretchable thin film surrounding the electrode, and a mechanism for supplying and discharging a cooling liquid into the stretchable bag-like body. There is.

In the case of this proposed electrode device, it is necessary to apply pressure to the coolant to inflate the pouch in order to bring the pouch in close contact with the body cavity wall so that high-frequency current can efficiently flow inside the body. The operational difficulty is how to select and control the pressure to be applied for this purpose. If the pressure is insufficient, there is insufficient contact between the sac and the body cavity wall, and if the pressure is too high, the sac will expand and expand the body cavity, making it difficult to judge how much pressure to apply. Not stick. For example, when this electrode device is applied to the esophagus, there is no guarantee that the pressure on the esophageal wall can be kept below the allowable limit (generally 30 to 40 mmHg).

[Problems to be Solved by the Invention] An object of the present invention is to reduce the pressure loss of the cooling liquid when flowing a predetermined flow rate of the cooling liquid into the space defined between the bag-like body and the flexible tube. In addition, the pressure of the coolant can be maintained at a low level, the accuracy of the pressure control of the coolant can be reduced, and when applied to a patient, the pressing force applied to the affected area is small, causing less pain to the patient. It is an object of the present invention to provide an intracavity high-frequency heating electrode device that can be moderated and, in addition, allows attachment of temperature detection means.

Another object of the present invention, in addition to achieving the above-mentioned objects, is to provide an intracavity high-frequency heating electrode device that makes it possible to heat a given region deep within a living body to a desired temperature. It is in.

[Means for Solving the Problems] According to the present invention, the above-mentioned object is to provide a flexible tube, and a cooling liquid supply path formed inside the tube substantially symmetrically with respect to the radial direction of the tube. and a flexible partition provided inside the tube to define a discharge path for the cooling liquid; and one end of the tube to close the supply path and the discharge path at one end of the tube. a closing member provided in the section, a flexible high frequency electrode supported by the aforementioned tube, and surrounding the electrode;
A substantially cylindrical bag-like body made of a flexible polymer whose both ends are respectively fixed to the aforementioned tube, and a space formed between the bag-like body and the aforementioned electrode, a feeding path, and a discharge. A first hole provided in the aforementioned pipe to communicate with one of the passages, and a second hole provided in the aforementioned pipe to communicate the aforementioned space with the other of the feeding passage and the discharge passage. This is achieved by an intraluminal high-frequency heating electrode device having a hole and a bag-like body having an outer diameter that allows it to come into close contact with the inner wall of the hollow organ without substantially elongating.

According to the present invention, the above-mentioned another object is to provide a flexible tube with a cooling liquid supply passage and a cooling liquid discharge passage within the tube substantially symmetrically with respect to the radial direction of the tube. a flexible partition provided within the tube to define the same, and a closing member provided at one end of the tube to close the feed passage and the discharge passage at one end of the tube; , a flexible high-frequency electrode supported by the aforementioned tube, and both ends of which are respectively fixed to the aforementioned tube to surround the electrode, so that the electrode is tightly attached to the inner wall of the hollow organ without substantially stretching. a substantially cylindrical bag-like body made of a flexible polymer and having an outer diameter that can be adjusted, a space formed between the bag-like body and the above-mentioned electrode, and one of a feeding path and a discharge path; A first hole provided in the aforementioned tube for communication between the aforementioned space and the other of the feed passage and the discharge passage; This is achieved by an intraluminal high-frequency heating electrode device equipped with temperature detection means fixed along the outer surface of the pouch-like body in order to measure the temperature of the inner wall of the hollow organ with which the pouch-like body is in close contact.

[Function] In the intraluminal high-frequency heating electrode device of the present invention, the tube is flexible, and the flexible partition wall cools the inside of the tube substantially symmetrically with respect to the radial direction of the tube. The first pipe is provided inside the pipe to define a liquid supply path and a cooling liquid discharge path.
A hole is provided in the tube to communicate the space formed between the bag-like body and the electrode with one of the feed path and the discharge path, and the second hole is Since the above-mentioned space is provided in the above-mentioned tube to communicate with the other of the above-mentioned feeding path and the above-mentioned discharge path, the intracavity high-frequency heating electrode device of the present invention is provided in the flexible tube. Compared to the case where a coolant supply pipe and a separate coolant discharge pipe are respectively inserted inside the flexible tube, and the case where a coolant supply pipe and a coolant discharge pipe are separately provided outside a flexible tube. , for a flexible tube having a predetermined outer diameter, the cross-sectional area of the coolant supply path and the cross-sectional area of the coolant discharge path can be increased, and as a result, when flowing the coolant at a predetermined flow rate, The pressure loss of the coolant can be reduced.

Further, in the intraluminal high-frequency heating electrode device of the present invention, since the bag-like body has an outer diameter that allows it to come into close contact with the inner wall of the hollow organ without substantially stretching, the following It has an effect. That is, (a) there is no need to stretch the bag-like body, so the pressure of the cooling liquid can be reduced.

(b) Since the bladder does not substantially stretch, the bladder can have a predetermined outer diameter regardless of the pressure of the coolant, thus reducing the accuracy of control of the pressure of the coolant. Can be done.

(c) Since the bag does not substantially stretch, the temperature sensing means can be fixed along the outer surface of the bag without interfering with the predetermined functions of the bag.

(d) When the intraluminal high-frequency heating electrode device of the present invention is applied to a patient, the pouch-like body does not substantially expand, so the pressing force applied to the inner wall of the hollow organ remains substantially constant; Since only the force corresponds to the pressure of the coolant inside the shaped body, the pressing force applied to the patient is small, and the pain caused to the patient can be alleviated.

Another intracavitary high-frequency heating electrode device of the present invention has the structure of the intracavitary high-frequency heating electrode device described above. Another aspect of the present invention is that the temperature sensing means is fixed along the outer surface of the pouch to measure the temperature of the inner wall of the hollow organ with which the pouch is in close contact. In addition to the above-mentioned effects, the intracavity high-frequency heating electrode device can heat a given region deep within a living body to a desired temperature.

Next, an intracavity electrode device according to a preferred embodiment of the present invention will be explained based on the drawings.

[Example] FIGS. 1 and 2 are diagrams explaining the principle of the present invention. In these two drawings, a medical high-frequency heating device 1 includes an intracavitary high-frequency heating electrode device 4 configured to be placed in and out of the lumen of the esophagus 3 of a living body 2, and a target heating of the esophageal wall, etc. An extracorporeal electrode device 6 configured to be disposed on the body surface facing the electrode device 4 so as to sandwich the region 5, and having an outer surface with a smaller curvature than the electrode device 4 as a whole.
For example, 3 to 30 MHz between the pair of electrode devices 4 and 6.
It is configured to flow a high frequency current of approximately 10 to 300 W with an output of approximately 10 to 300 W, and includes a high frequency power source 7 whose frequency and output are adjustable, for example. In this medical high-frequency heating device 1, a strong electric field is formed near the electrode device 4, which has a large curvature, so between the electrode devices 4 and 6, the target heating site 5 of the esophageal wall located near the electrode device 4 is selected. can be heated.

It should be noted that the electrode device 4 may be configured to be applied to other luminal organs so that it can be moved in and out by oral, transanal, transvaginal, or other methods.

Details of a preferred embodiment of the electrode arrangement 4 according to the invention are shown in FIGS. 3-8.

In FIGS. 3 to 8, the pipe 8 is a flexible two-channel pipe made of silicone rubber in which a cooling liquid supply path 9 and a cooling liquid discharge path 10 are integrally formed. In this pipe 8, the feed path 9 and the discharge path 10 are completely separated, so that the resistance to the flow of the coolant can be kept low. As long as a sufficient flow of the coolant through the supply path 9 and the discharge path 10 can be allowed with small pipe resistance, the pipe 8 is preferably thin so that it can easily enter and exit a predetermined hollow organ. When the electrode device 4 is applied to the esophagus, the tube 8 has an outer diameter of about 5 to 8 mm and a length of 70 to 80 cm.
A certain degree is used. The tube 8 may have three or more channels of coolant passages, and may also have penetration holes for lead wires, temperature detection means, and the like. It may also be made of a non-toxic, non-conductive, flexible material other than silicone rubber.

Note that the flexible tube according to the present invention has a structure in the inside of the tube so as to define the inside of the tube into a coolant supply path and a coolant discharge path substantially symmetrically with respect to the radial direction of the tube. A flexible septum is provided.

At the tip side of this tube 8, there is a flexible high-frequency electrode 11 and a flexible polymer bag-like body 1 having dimensions that allow it to come into close contact with the inner wall of the hollow organ without stretching.
A cooling liquid supply connector 13 and a cooling liquid discharge connector 14 are provided at the proximal end of the tube 8 integrally with the cooling liquid supply path 9 and the cooling liquid discharge path 10, respectively. There is. The connecting portions between the connectors 13, 14 and the tube 8 are hardened with a silicone adhesive and further covered with a silicone heat shrink tube 8a.

The electrode 11 is fixed to the outer periphery of the tube 8 and is made of a tubular braided body of metal wire, but other materials such as a bellows or a spiral body may be used as long as it has flexibility. The length of the electrode 11 in the axial direction is approximately the same as the length of the tumor lesion. The metal wire of the braided body may be any material that is not attacked by the coolant, and may be made of, for example, stainless steel wire or tin-plated copper wire.

A tip 16 of a high frequency lead wire 15 (eg, outer diameter of about 1 mm) is fixedly connected to the base end of the electrode 11 by means of soldering or the like. This lead wire 15 extends along the outer periphery of the tube 8 to near the base of the tube 8, and a connector 17 for connection to the power source 7 is attached to the extended end.

The pouch 12 is formed into a cylindrical shape according to the size and shape of the lumen near the lesion to which it is applied, and if desired, the size and shape of the stenosis caused by the tumor, and surrounds the electrode 11. It is fixed to the outer periphery of the tube 8 at both ends 18 and 19, which are reduced in diameter so as to have a smaller diameter. When the electrode device 4 is applied to the esophagus, the bag-like body 12 has an outer diameter of, for example, 5 to 25
mm, length of about 30 to 100 mm is used.
When inserting the electrode device 4 into the cavity, the bag-like body 12
is deflated as shown in FIG. 8, and preferably folded as shown, for example, in phantom lines in FIG. The way it is folded is not particularly limited, but
It is preferable that at least one of the temperature detecting means described below can be brought into close contact with the target temperature measuring section.

The bag-like body 12 may be formed by molding a flexible polymer membrane, such as a plastic film or tube such as a flexible polyethylene membrane or polypropylene membrane, into a predetermined shape. From this point of view, it is preferable to use a molded tube or balloon made of silicone rubber.

In this specification, having an outer diameter that allows the bag-shaped body 12 to come into close contact with the inner wall of a hollow organ without substantially stretching means that the feeding port 20 is a hole communicating with the feeding path 9 of the tube 8. When the bag-like body 12 is inflated into the given shape shown in FIGS. Even if the pressure of the coolant in the interior 21 of the body 12 is small, the bladder 12 can be expanded from the folded state, and during this transformation from the folded state to the unfolded state, the membrane of the bladder 12 actually Refers to dimensions that cannot be stretched upward. In other words, the pressure of the coolant in the chamber 21 within the bladder 12 is used to unfold the bladder 12 from the folded state so that the bladder 12 can be brought into close contact with the cavity wall.
It is not intended to be stretched and pressed against the cavity wall. The pressing pressure of the bag-shaped body 12 against the cavity wall is usually about 500 mm water column or less, and preferably does not exceed 1000 mm water column. Note that the bag-like body 12 may be partially wrinkled in the expanded state.

22a, 23a, 24a, 25a, 26a are copper and constantan thermocouples 2 as temperature detection means.
2, 23, 24, 25, 26, and the thermocouples 22, 23, 24, 25, 26 are the hot junctions of the bag-like body 1.
2 is adhesively fixed to the outer surface of the bag-like body 12 so that it can be brought into close contact with the cavity wall when expanded by the cooling liquid. The thermocouple is adhesively fixed, for example, using a silicone adhesive while the bag-like body 12 is inflated. The hot junctions 22a, 23a, and 24a are provided at an angle of 120° with respect to the center of the electrode device 4 at the middle of the length of the bag-like body 12, and at the center of the electrode 11 in the length direction. Used to monitor the circumferential cavity wall temperature distribution. Note that the temperature may be monitored at four or more points in the circumferential direction, or at two or one point. The contacts 25a and 26a are provided on both sides of the contact 24a so as to be substantially opposite to both ends of the electrode 11 in the length direction, and are used to monitor the temperature distribution of the cavity wall along the length of the affected area. . The temperature of the cavity wall may be monitored at four or more points along the length, or at two or one point. As the temperature detection means, other thermocouples such as chromel or alumel may be used instead of copper or constantan, or a thermistor or the like may be used instead of the thermocouple.
Incidentally, if the heat dissipation through the bag-like body 12 cannot be ignored, the detection output of the temperature detection means is useful for monitoring the degree of heating although it is different from the biological surface temperature accurately. In the electrode device 4, thermocouples 22, 23, 24, 2 are installed in order to prevent the bag-like body 12 from being stretched.
5, 26 lead wires 22b, 23b, 24b, 2
Even if 5b and 26b are adhesively fixed along the outer surface of the bag-like body 12, the predetermined operation of the bag-like body 12 is not hindered.

The lead wires 22b, 23b, 24b, 25b, and 26b of the thermocouples 22, 23, 24, 25, and 26 do not actually intersect with the high-frequency lead wire 15, and are connected to the lead wire 15 and the proximal end of the bag-like body 12. Part 1
8 and is fixed to the outer periphery of the central portion of the tube 8 by a silicone heat shrink tube 27. (still,
The outer diameter of the tube 8 is about 6 mm, and the outer diameter of the lead wire 15 is 1.
mm, the outer diameter of the tube 27 is, for example, 8 mm.
That's about it. ) That is, as shown in FIGS. 3, 5, and 6, for example, a high frequency lead wire 15 extends along one side of the outer periphery of the tube 8, and a thermocouple lead wire 22b, 23b, 24b,
The tube 8 is closed by a heat shrink tube 27 such that 25b, 26b extend along the other side of the outer periphery of the tube 8.
is fixed to the outer periphery of the lead wires 22b, 23b, 24b, 25 due to noise from the lead wire 15.
There is little risk that the temperature signals of b and 26b will fluctuate.
The tube 27 also facilitates the insertion and removal of the electrode device 4. Note that the end portion 19 of the bag-like body 12 is fixed to the tube 8 with a silicone adhesive.

Connector 28 has lead wires 22b, 23b, 24
The connector 28 is a connector for connecting lead wires 22b, 23b, 24b, 25b, 26b.
b, 25b, 26b are fixedly connected to each other, and a 10-pin type socket part 30 is formed by crimping the lid part 29, and the socket part 3 is fixed to the outer periphery of the pipe 8.
It consists of a 10-pin type plug part 32 which is detachable from the 0 and has a lead wire 31 connected to a temperature measuring voltmeter.

The discharge port 33 as a hole communicates the discharge path 10 of the pipe 8 with the inside 21 of the bag-like body 12, and the connector 34 is a connector of a coolant supply tube connected to a pump 35 and a cooler 36. , connector 1
3, and is configured to be detachably attached to the camera.
Connector 37 is configured to be removably attached to connector 14 and configured to drain or return coolant to cooler 36 via coolant drain tube 38 . Note that the cooling liquid may be supplied from the side of the discharge port 33 and discharged from the side of the supply port 20, or two or more of each of the supply ports 20 and two or more discharge ports 33 may be provided. Good too.

Next, the operation and operation of the medical high-frequency heating device 1 having the electrode device 4 configured as described above will be explained.

First, with the bag-like body 12 folded as shown in the imaginary line in FIG. 8, the electrode device 4 is inserted into the cavity to a predetermined depth from the distal end side where the sealing plug 39 as a closing member is located. When the electrode device 4 is inserted into the cavity so that the electrode 11 faces the patient on the cavity wall,
Connectors 34, 13 and 37, 14 are connected,
Coolant is introduced into the interior 21 of the bag-like body 12 by the pump 35 through the feed line 9 and the feed port 20, both of which have low pipe resistance. When the bag-like body 12 is expanded from the folded state by introducing cooling water into the interior 21, the bag-like body 12 and the thermocouple on the outer surface of the bag-like body 12 are expanded without strongly compressing the cavity wall. Hot junction 22a, 2
3a, 24a, 25a, and 26a are brought into close contact with the cavity wall, and temperature detection signals of the cavity wall surface by the thermocouples 22, 23, 24, 25, and 26 are taken out via the lead wire 31. The cooling water introduced into the interior 21 of the bag-like body 12 flows approximately axially through the interior 21 and is then discharged through the discharge port 33, the discharge passage 10, and the tube 38, which have small pipe resistance. On the other hand, at the same time as starting the circulation of the cooling water, the connector 17a,
A high frequency current is caused to flow between the electrode device 4 and the electrode device 6 at a predetermined position from the high frequency power source 7 via the electrode device 17 . Based on the temperature output from the lead wire 31, the output of the high-frequency power source 7, the cooling water temperature from the cooler 36, and the cooling water flow rate from the pump 35, etc. are adjusted manually or automatically. The affected area of the wall can be heated to the desired temperature. At this time, the circulating cooling water prevents the cavity wall surface in contact with the bag-like body 12, the bag-like body 12, and the electrode 11 from overheating.

When heating for a predetermined period of time is completed, for example, the supply of cooling water is stopped and the cooling water is discharged from the discharge tube 38 side to deflate the bag-shaped body 12, and then the connectors are further disconnected if desired. After that, the electrode device 4 is removed outside the cavity.

In actual use, it is preferable to prepare several kinds of bag-like bodies having different outer diameters and lengths depending on the inner wall of the hollow organ to which the electrode device 4 of the present invention is applied.

Furthermore, depending on the shape of the desired heating section, the electrode device 6 may be arranged at two locations on the body surface instead of one on one side of the body surface, or may be arranged in an endless ring shape. It may also be something that is done. The electrode device 6 is also preferably flexible so that it can be brought into close contact with the body surface, and if desired, the body surface facing the electrode device 6 may be cooled with cooling water.

Electrode device 4 according to the invention having the structure shown in FIG.
was produced. In this electrode device 4, the electrode 11
has an outer diameter of 8 mm and a length of 80 mm, the bag-like body 12 is made of silicone rubber, the average wall thickness of the bag in a non-stretched state is 0.2 mm, and the outer diameter of the enlarged diameter portion 12a in a non-stretched state is It was 15mm long and about 100mm long.

For comparison, the bag-like body 1 of this electrode device 4
Instead of 2, the outer diameter of the enlarged diameter part in the non-stretched state is approximately 8.
mm bag-like body (other conditions are the same as electrode device 4)
An electrode device for comparison was fabricated using two stacked sheets.

In addition, in the electrode device 4, the hot junctions 22a, 23a, 2
The temperature was measured using three thermocouples 22, 23, and 24 whose angular positions 4a were 120 degrees from each other. In the comparative electrode device, three thermocouples were similarly arranged between two bag-like bodies.

The electrode device 4 of one embodiment of the present invention or a comparative electrode device was inserted into a dog's stomach, which had been processed into a tubular shape with an inner diameter of about 12 mm, and the cooling liquid was flowed to bring the respective pouch-like bodies into contact with the inner surface of the stomach. Then, the external electrode was fixed to the dog's abdomen, and a high-frequency current was intermittently applied between the electrode device 4 and the external electrode, or between the comparative electrode device and the external electrode, using a power source of 13.56 MHz and 100 W. to warm the dog's stomach wall. The internal pressure required to expand the bag-like body 12 of the electrode device 4 into a predetermined shape was approximately 500 mm of water column, and the internal pressure necessary to inflate the bag-like body of the electrode device for comparison to an outer diameter of 12 mm was 3000 mm of water column.

The pattern or state of temperature raising and cooling by the above-mentioned intermittent heating using the electrode device 4 is shown in FIG. The pattern or state of
This is shown in Figure 1. As can be seen from FIGS. 10 and 11, when the electrode device 4 is used (10
Figure), the time T required to raise the temperature from 42℃ to 44℃
44℃ after 1a cuts off the high frequency current supply for about 30 seconds
The time T2a required for the temperature to drop from to 42℃ is approximately 20
In contrast, when using a comparative electrode device (Fig. 11), the temperature ranged from 42℃ to 44℃ under the same conditions.
The time T1b required to raise the temperature by 2 degrees is approximately 50
seconds, the time required to drop from 44℃ to 42℃ T2
b was approximately 30 seconds.

Based on this difference in response speed, the bag-like body 12 of the electrode device 4 of the present invention, which can be brought into close contact with the inner surface of the stomach over a wide range in the longitudinal direction without applying excessive pressure to the stomach wall, is better than the comparative bag-like body 12. It can be seen that the contact thermal resistance is smaller than that of the bag-shaped electrode device.

In addition, in FIGS. 10 and 11, the vertical axes are the temperatures detected by the thermocouple that showed the highest temperature among the three thermocouples of the electrode device 4 and the comparative electrode device, respectively. The difference between the highest and lowest temperature at each point measured by the three thermocouples is
Whereas in the case of electrode device 4 it was within 2 degrees,
In the case of the comparative electrode device, the temperature was 3 times.

This means that, as an electrode device used for thermotherapy that heats a tumor at a temperature of 42 to 45°C for 30 minutes to several hours, electrode device 4 is better than the comparative electrode device in that it can warm the patient more uniformly. It has been shown to be more useful than

In terms of impedance matching with the living body, electrode device 4 was able to achieve stable matching and was able to perform heating with a real wave ratio (SWR) of 1.5 or less; however, with the comparative electrode device, the SWR often As the SWR increases, the matching conditions must be corrected each time, and it is difficult to maintain the SWR below 2.

As described above, in the intracavity high-frequency heating electrode device of the present invention, the bag-like body that surrounds the high-frequency electrode and into which the cooling liquid is supplied and discharged has sufficient flexibility and can be expanded by the cooling water pressure. Since the pouch-like body can be brought into contact with the cavity wall without excessive pressure on the cavity wall, it can be expanded within the cavity and brought into close contact with the cavity wall. When used, it is possible to selectively heat deep parts of the body, such as the cavity wall near the high-frequency electrode of the intracavity high-frequency heating electrode device, without causing great pain to the patient.

[Effects of the Invention] In the intraluminal high-frequency electrode device of the present invention, the tube is flexible, and the flexible partition wall cools the inside of the tube substantially symmetrically with respect to the radial direction of the tube. A first hole is provided inside the tube to define a liquid supply path and a cooling liquid discharge path, and a first hole is provided between the space formed between the bag-like body and the electrode and the first hole. A second hole is provided in the pipe to communicate the above-mentioned space with the other of the above-mentioned feed path and the above-mentioned discharge path. Since the above-mentioned tube is provided for communication, the intracavity high-frequency heating electrode device of the present invention inserts a coolant supply tube and a separate coolant discharge tube into the flexible tube, respectively. In contrast to the case where a cooling liquid supply pipe and a cooling liquid discharge pipe are provided separately on the outside of the flexible pipe, the cooling liquid is delivered by a flexible pipe having a predetermined outer diameter. The cross-sectional area of the passage and the cross-sectional area of the coolant discharge passage can be increased, and as a result, the pressure loss of the coolant can be reduced when a predetermined flow rate of the coolant flows.

Further, in the intraluminal high-frequency heating electrode device of the present invention, since the bag-like body has an outer diameter that allows it to come into close contact with the inner wall of the hollow organ without substantially stretching, the following It has an effect. That is, (a) there is no need to stretch the bag-like body, so the pressure of the cooling liquid can be reduced.

(b) Since the bladder does not substantially stretch, the bladder can have a predetermined outer diameter regardless of the pressure of the coolant, thus reducing the accuracy of control of the pressure of the coolant. Can be done.

(c) Since the bag does not substantially stretch, the temperature sensing means can be fixed along the outer surface of the bag without interfering with the predetermined functions of the bag.

(d) When the intraluminal high-frequency heating electrode device of the present invention is applied to a patient, the pouch-like body does not substantially expand, so the pressing force applied to the inner wall of the hollow organ remains substantially constant; Since only the force corresponds to the pressure of the coolant in the body, the pressing force applied to the affected area is small, which can alleviate the pain caused to the patient.

Another intracavitary high-frequency heating electrode device of the present invention has the structure of the intracavitary high-frequency heating electrode device described above. Another aspect of the present invention is that the temperature sensing means is fixed along the outer surface of the pouch to measure the temperature of the inner wall of the hollow organ with which the pouch is in close contact. In addition to the above-mentioned effects, the intracavity high-frequency heating electrode device can heat a given region deep within a living body to a desired temperature.

[Brief explanation of drawings]

1 and 2 are diagrams for explaining the principle of the present invention, FIG. 3 is a detailed explanatory diagram of an embodiment of the intracavity high-frequency heating electrode device of the present invention, and FIG. 4 is a diagram for explaining the principle of the present invention.
5 is a detailed explanatory view of the part in FIG. 4, FIG. 6 is an explanatory view of the - line cross section of FIG. 3, FIG. 7 is an explanatory view of the - line cross section of FIG. 3, and FIG. 9 is an explanatory cross-sectional view similar to FIG. 7 when the bag-like body is in a deflated state, FIG. 9 is an explanatory view of the thermocouple connector of FIG. 3, and FIGS. 10 and 11 are each a preferred embodiment of the present invention. It is a graph showing an example of a heating pattern when using an example intracavity high-frequency heating electrode device and a comparative electrode device. 9... Feeding channel, 10... Discharging channel, 11... Electrode for high frequency, 12... Bag-shaped body, 20... Feeding port,
22, 23, 24, 25, 26... thermocouple, 33
……Vent.

Claims (1)

[Scope of Claims] 1. A flexible tube, and a tube for defining the inside of the tube into a cooling liquid supply path and a cooling liquid discharge path substantially symmetrically with respect to the radial direction of the tube. a flexible partition provided inside the tube, a closing member provided at one end of the tube to close the feed passage and the discharge passage at one end of the tube, and a closure member supported by the tube. a substantially cylindrical and flexible polymeric bag-like body having both ends fixed to the tube to surround the electrode; and the bag-like body a first hole provided in the pipe to communicate a space formed between the electrode and one of the feeding path and the exhaust path; and a first hole provided in the tube, and the space and the feeding path and the exhaust path. and a second hole provided in the tube to communicate with the other of the tubes, and the bag-like body has an outer diameter that allows it to come into close contact with the inner wall of the hollow organ without substantially stretching. A high-frequency heating electrode device for intracavitary use. 2. The device according to claim 1, wherein the tube has a penetration hole for a lead wire of the electrode. 3. The device according to claim 1 or 2, wherein the electrode is spirally wound around the tube. 4. Claims 1 to 4, wherein the first hole is provided near one end of the bag-like body, and the second hole is provided near the other end of the bag-like body. Apparatus according to any one of clause 3. 5. A flexible pipe, and a flexible pipe provided inside the pipe so as to define the inside of the pipe into a cooling liquid supply path and a cooling liquid discharge path substantially symmetrically with respect to the radial direction of the pipe. a flexible partition, a closing member provided at one end of the tube to close the feed passage and the discharge passage at one end of the tube, and a flexible high frequency wave supported by the tube. a substantially cylindrical and flexible electrode having an outer diameter capable of closely contacting the inner wall of the hollow organ without substantially stretching, the electrode being fixed to the tube at both ends to surround the electrode; A first tube provided in the tube so as to communicate a bag-like body made of a polymer with a space formed between the bag-like body and the electrode, and one of the feeding path and the discharge path. temperature of the inner wall of the hollow organ in close contact with the second hole provided in the tube to communicate the space with the other of the feed passage and the discharge passage; An intracavity high-frequency heating electrode device comprising temperature detection means fixed along the outer surface of the bag-like body for measurement. 6. The device according to claim 5, wherein the tube has a penetration hole for the temperature detection means. 7. Device according to claim 5 or 6, in which the tube has another penetration hole for the lead wire of the electrode. 8. A device according to any one of claims 5 to 7, wherein the electrode is spirally wound around the tube. 9. Claims 5 to 9, wherein the first hole is provided near one end of the bag-like body, and the second hole is provided near the other end of the bag-like body. Apparatus according to any one of clause 8.