JPH09313619A - Applicator for thermotherapy - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an applicator for THERMOTHERAPY which can be applied to the lengths of various intracelom diseased parts as well and further can be easily inserted and adhered even into the strangulated intracelom diseased part. SOLUTION: This applicator is provided with a 1st shaft 5 to be inserted into a tract cavity and a 2nd shaft 11 interpolated into the 1st shaft 5 and made thinner than that 1st shaft 5, has a function for protruding the top end of the 2nd shaft 11 from the top end of the 1st shaft 5 and a function for housing that protruded top end part into the 1st shaft 5 and is provided with an electrode 13 for high-frequency warming at the top end of the 2nd shaft 11 to be protruded/disappear from the 1st shaft 5. By protruding the top end part of the 2nd shaft 11 from the top end of the 1st shaft 5 or housing it, this applicator can be used while changing the form of the electrode for high-frequency warming corresponding to the conditions inside the tract cavity.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thermotherapy apparatus for heating an affected area in a lumen and treating the affected area, and more particularly to an applicator for the thermotherapy.

[0002]

2. Description of the Related Art It is known that cancer cells are necrotic when heated at a temperature of about 43 ° C. Utilizing this property, a hyperthermia treatment method for heating and treating an affected part in a body cavity has been performed. An applicator used for this hyperthermia treatment is disclosed in Japanese Utility Model Laid-Open No. 63-23676. This hyperthermia treatment device includes an internal applicator inserted into a body, particularly a luminal organ, and an external applicator installed opposite to the internal applicator, and a high frequency energy is applied between the applicators to cause a lesion in the internal cavity of the living body. To warm and treat.

[0003]

However, it has been clarified by experiments that the length effective for heating an in-body applicator with a balloon of this kind substantially matches the length of the heating electrode portion. Therefore, it has been necessary to prepare a plurality of types of in-body applicators having different electrode portion lengths depending on the length of the affected area and selectively use them depending on the length of the affected area. As described above, it is necessary to prepare several kinds of applicators in the body, which increases equipment costs and management costs.

Further, since the shaft diameter of the in-body applicator is uniform, it is generally difficult to insert this heating part into a narrowed body cavity affected part and make it adhere to the inside thereof.

The present invention has been made in view of the above-mentioned problems, and the purpose thereof is to be applicable to various lengths of affected parts in a body cavity, and further to be inserted into a narrowed affected part in a body cavity so as to be in close contact. To provide an applicator for thermotherapy which is easy to operate.

[0006]

SUMMARY OF THE INVENTION The present invention is a thermotherapy applicator which is inserted into a lumen and is subjected to thermotherapy by applying a high frequency to the affected area by an electrode section.
Shaft, a second shaft inserted into the first shaft and thinner than the first shaft, and a function of causing the tip end portion of the second shaft to protrude from the tip end of the first shaft and the protruding tip end portion thereof. And a high-frequency heating electrode disposed at the tip of the second shaft projecting and retracting from the first shaft.

By projecting or accommodating the tip of the second shaft from the tip of the first shaft,
The form of the high-frequency heating electrode is changed and used according to the situation inside the lumen.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION

<First Embodiment> A first embodiment of the present invention with reference to FIGS.
An embodiment will be described. (Structure) FIG. 1A shows a schematic structure of the entire in-body applicator according to the first embodiment. The in-body applicator 1 is divided into three functional parts, a heating part 2, an insertion part 3 and a connection part 4. The insertion portion 3 is composed of a first shaft 5 made of a long sheath.

FIG. 1 (b) is a cross-sectional view of the heating section 2. The heating unit 2 has a first heating unit 2a provided on the first shaft 5 and a second heating unit 2b provided on a second shaft 11 described later. And, the first heating unit 2a is the first
The first electrode 6 made of a conductive wire is spirally arranged on the outer circumference of the tip of the shaft 5. One end of the first electrode 6 is connected to the electrode lead wire 7 passing through the inner cavity of the first shaft 5. The other end of the electrode lead wire 7 is connected to the electrode connector 8 of the connecting portion 4.

A second shaft 11 is inserted in the inner cavity of the first shaft 5. The second shaft 11 constitutes the second heating portion 2b at its tip portion, and constitutes the slide portion 12 at its proximal portion. Second heating section 2b
Is composed of a second electrode 13 made of a conductive wire and spirally arranged on the outer circumference of the tip of the second shaft 11. Second
One end of the electrode 13 is connected to the other end of the first electrode 6 via a stretchable electrode lead wire 14. That is, the first
The electrode 6 and the second electrode 13 are connected via an electrode lead wire 14, and are further connected to an electrode connector 8 of the connecting portion 4 via an electrode lead wire 7. The electrode lead wire 14 has an expandable coil portion 15 formed in the middle thereof, and the expandable coil portion 15 expands and contracts the entire length of the electrode lead wire 14.

Here, the electrodes 6 and 13 are both coil electrodes, but the type thereof may be another metal blade or the like. The first electrode 6 and the second electrode 13 are covered with electrically insulating cover covers 16 and 17, respectively. Temperature sensors 18 and 19 are provided on the covering covers 16 and 17, respectively. Temperature sensor 1
Reference numerals 6 and 17 are relay wires (not shown) inserted into the insertion portion 3.
Are connected to the temperature sensor connectors 21 and 22 of the connection part 4 of the in-body applicator 1, respectively.

The second shaft 11 is slidable with respect to the first shaft 5 by operating means described later. That is, the slide portion 12 of the second shaft 11
The rear end bar portion 12 a of the first shaft 5 projects rearward from the rear end of the first shaft 5. Holding the rear end bar portion 12a in the hand and sliding the second shaft 11 causes the tip end portion of the second shaft 11 to protrude from the tip end of the first shaft 5 or the tip end of the first shaft 5. It can be stored in the department.

Further, the slide portion 12 of the second shaft 11
A large-diameter portion 23 is formed at the tip portion of. The large diameter portion 23 is guided back and forth along a large diameter guide inner hole 24 formed in the tip portion of the first shaft 5. Also,
The large-diameter portion 23 abuts on the step portion at the front end or the rear end of the guide inner hole 24 at the front and rear ends when moving the second shaft 11 back and forth. Therefore, the second shaft 11 does not come off from the inside of the first shaft 5, and the second shaft 11 does not come out at the end position when the second heating portion 2b is projected from the tip of the first shaft 5 and the second portion inside the tip of the first shaft 5. It has a structure that regulates the end position when the heating unit 2b is stored. Then, the tip end portion of the second shaft 11 projects or retracts from the tip end of the first shaft 5 within a range between both end positions thereof.

In order to prevent the entanglement of the electrode lead wires 14, it is desirable that the second shaft 11 be guided back and forth without rotating about the axis of the first shaft 5. Therefore, it is desirable to provide a means for restricting the rotation between the first shaft 5 and the second shaft 11. For example, the cross-sectional shape of the large-diameter portion 23 of the first shaft 5 and the cross-sectional shape of the guide inner hole 24 into which the large-diameter portion 23 fits and slides are formed in different shapes such as a rectangular shape, It is preferable to prevent rotation around the axis.

The connecting portion 4 of the in-body applicator 1 is provided with a slide adjusting device 26 for restricting the amount of protrusion when the second shaft 11 is moved forward and backward. The slide adjusting device 26 has a tubular adjusting member 27 fixedly provided on the connecting portion 4, and a fixing screw 28 for fixing the rear end bar portion 12a of the second shaft 11 inserted through the adjusting member 27 at an arbitrary position. It is equipped with. If the fixing screw 28 is loosened, it can be slid back and forth on the rear end bar portion 12a. Then, the protruding position of the second shaft 11 can be selected, and the fixing screw 28 can be tightened at that position to fix it at an arbitrary position.

This in-body applicator 1 is used by being connected to the extracorporeal electrode 31 and the thermotherapy apparatus main body 32 shown in FIG. The thermotherapy device main body 32 is provided with a thermometer 33 having a thermocouple amplifier and the like, and a high frequency output section 34.

(Operation) FIG. 2 shows a situation where the thermotherapy device is used. First, the electrode connector 8 of the internal applicator 1
And the temperature sensor connectors 21 and 22 are connected to the thermotherapy device main body 32.

Next, the insertion portion 3 of the internal applicator 1 is
The patient 35 is inserted into the luminal organ while using X-ray fluoroscopy. At this time, the length by which the tip of the second shaft 11 projects from the tip of the first shaft 5 is adjusted by the slide adjusting device 26 in advance according to the length of the affected part 36. Alternatively, the length by which the second shaft 11 protrudes from the tip of the first shaft 5 after the insertion portion 3 of the in-vivo applicator 1 is inserted into the patient 35 may be adjusted depending on the length of the affected portion 36 each time. .

Finally, the extracorporeal electrode 31 is attached to the patient 35, and the preparation for heating treatment is completed. The external electrode 31 may be attached before inserting the internal applicator 1 into the patient 35. Then, a high-frequency output unit 34 is output using a switch or the like (not shown), and a high-frequency current is supplied to the in-body applicator 1 facing the extracorporeal electrode 31. As a result, the affected area 3
The heating unit 5 is intensively heated by the heating unit 2.

During heating, the temperature sensors 18 and 19 are used to affect the affected area 3.
Monitor the temperature of 6. Further, the output of the high frequency output unit 34 may be adjusted by the temperature value detected by the temperature sensors 18 and 19 to control the heating capacity of the thermotherapy device.

(Effect) Since the length of the second shaft 11 protruding from the tip of the first shaft 5 can be adjusted, the total length of the first electrode 6 and the second electrode 13 can be adjusted. That is, the second heating portion 2b extending from the first heating portion 2a.
The length of the entire heating unit 2 can be selected depending on the length of. Therefore, the total length of the electrodes 6 and 13 of the heating part 2 can be changed according to the length of the affected part 36. Therefore, efficient heating can be performed regardless of the length of the affected part 36.

Further, since the tip end portion of the second shaft 11 has a smaller diameter than the first shaft 5, the tip end side portion of the heating part 2 of the internal applicator 1 becomes thinner, and the thin tip end side portion becomes It can be inserted into a narrow lumen. In particular, even if the affected part 36 is a narrowed part, the thin second heating part 2b of the second shaft 11 can be inserted and installed, and the affected part 36 can be installed.
The adhesion with can be improved.

The temperature sensor 1 on the first heating part 2a of the first shaft 5 and the second heating part 2b of the second shaft 11 is also provided.
Since the temperature of the heated surface can be monitored by 8 and 19, safer heating can be performed.

<Second Embodiment> A second embodiment of the present invention will be described with reference to FIG. (Structure) Fig.3 (a) shows the schematic structure of the whole in-body applicator 1 which concerns on 2nd Embodiment, and FIG.3 (b) is sectional drawing of the heating part 2 of the in-body applicator 1.

This hyperthermia treatment apparatus has almost the same configuration as that of the first embodiment described above, but the following points of the internal applicator 1 are different. That is, the first electrode 6 of the first heating unit 2a
The energization line of No. 2 and the energization line of the second electrode 13 of the second heating unit 2b are distinguished from each other, and the first electrode 6 and the second electrode 13 can be selectively energized. That is, the first
Electrode lead wire 7a connected to the first electrode 6 of the shaft 5
And an electrode lead wire 7b connected to the second electrode 13 of the second shaft 11 are separated, and these electrode lead wires 7a,
7b is guided to the connection portion 4 through the first shaft 5. The first electrode connector 8a is attached to the one electrode lead wire 7a.
And the second electrode connector 8b is connected to the other electrode lead wire 7b. The high-frequency output unit of the thermotherapy apparatus main body is configured to be able to individually and simultaneously supply power to the first electrode connector 8a and the second electrode connector 8b.

(Operation) The same operation as in the first embodiment is used, but the first electrode 6 of the first heating part 2a and the second heating part 2 are used.
Either one of the second electrodes 13b of b can be separately energized, or both of them can be energized simultaneously.

(Effect) Since the first electrode 6 of the first heating part 2a and the second electrode 13 of the second heating part 2b can be separately energized, the heating pattern can be changed depending on the shape of the affected part. Yes, more effective heating is possible.

<Third Embodiment> A third embodiment of the present invention will be described with reference to FIG. (Structure) FIG. 4 shows an internal applicator 1 according to the third embodiment.
The overall schematic structure is shown. The thermotherapy device has almost the same configuration as that of the first embodiment described above, but the following points of the internal applicator 1 are different.

That is, the first electrode 6 on the first shaft 5
A cooling water passage 41 is provided around the second electrode 13, and a cooling water passage 42 is provided around the second electrode 13 on the second shaft. The cooling water passages 41 and 42 are connected to the cooling water connectors 45 and 46 provided in the connecting portion 4 through the cooling water supply passages 43 and 44 that pass through the inside of the first shaft 5. When the cooling water is supplied from the cooling water connector 45 on the inflow side, the cooling water channels 41, 42
The cooling water flows to the cooling water connector 46 on the outflow side. The cooling water connectors 45 and 46 are adapted to be connected to a cooling water perfusion device (not shown) of the thermotherapy device main body. The cooling water passages 41, 42 are arranged, for example, in parallel or in series and connected to the cooling water supply passage.

(Operation) The operation is almost the same as in the first embodiment, but the temperature of the surface of the affected area is lowered by flowing cooling water around the electrodes 6 and 13 during heating.

(Effect) By lowering the surface temperature of the affected area, it becomes possible to heat even deeper areas.

<Fourth Embodiment> A fourth embodiment of the present invention will be described with reference to FIG. (Structure) FIG. 5 shows an internal applicator 1 according to the fourth embodiment.
The overall schematic structure is shown. The thermotherapy device has almost the same configuration as that of the first embodiment described above, but the following points of the internal applicator 1 are different. That is, a channel 51 that penetrates the second shaft 11 is provided in the second shaft 11, and the connector 4 is provided with a cap 52 that communicates with the channel 51.

(Operation) Although it is almost the same as that of the first embodiment, various kinds of inserts are passed through the channel 51 to perform another treatment or diagnosis.

(Effect) For example, it is possible to easily insert the applicator 1 in the body through a guide wire in the channel 51, observe an affected part by inserting an endoscope, and simultaneously perform radiation treatment through a brachytherapy source transfer tube. It becomes possible to do.

<Fifth Embodiment> A fifth embodiment of the present invention will be described with reference to FIGS. 6 and 7. (Structure) FIG. 6 shows an internal applicator 1 according to the fifth embodiment.
The overall schematic structure is shown. FIG. 7 shows the thermotherapy device body 6
The structure of 0 is shown.

This thermotherapy apparatus has almost the same structure as that of the first embodiment described above, but the electrode 6 of the first heating section 2a of the internal applicator 1 and the electrode 13 of the second heating section 2b are antennas. The difference is that it is a monopolar electrode having 55. Further, in the connection part 4 of the in-body applicator 1, an electrode connector 57 of a transmission cable 56 that communicates with the first electrode 6 of the first heating part 2a and a transmission cable that communicates with the second electrode 13 of the second heating part 2a. 58 electrode connectors 59 are provided.

As shown in FIG. 7, the thermotherapy device main body 60 is provided with a connector 61 for connecting the electrode connector 57 of the in-body applicator 1 and a microwave connector 62 for connecting the electrode connector 59. Further, sensor connectors 63, 6 for connecting the temperature sensor connectors 21, 22
4 are provided.

The microwave connectors 61, 62 are connected to the microwave output section 66 via a coaxial switch 65. The output of the microwave output unit 66 is controlled by the control unit 67, and the output value thereof is controlled by using the measurement data of the thermometer 33.

(Function) Although it is used for the thermotherapy of the affected part by inserting it into the luminal organ in substantially the same manner as the first embodiment, the electrode of the heating part 2 is composed of a monopolar electrode, and its antenna 55 is used. Since the affected area is irradiated with microwaves, an extracorporeal electrode is not required when heating the affected area.

(Effect) When this in-body applicator 1 is used, no extracorporeal electrode is required, so that heating can be performed easily.

<Sixth Embodiment> A sixth embodiment of the present invention will be described with reference to FIG. (Structure) FIG. 8 shows an internal applicator 1 according to the sixth embodiment.
The heating part 2 at the tip of is shown. The internal applicator 1 has almost the same configuration as that of the first embodiment described above, but the heating unit 2 is
Is not only the first shaft 5 and the second shaft 11, but also a plurality of shafts 71, 72, ... A third heating portion 2c is formed at the tip of the third shaft 71, and a fourth heating portion 2c is formed at the tip of the fourth shaft 71.
The heating part 2d is formed. Then, not only is the second heating portion 2b projected and retracted from the tip of the first shaft 5, but the third heating portion 2c is projected and retracted from the tip of the second shaft 11, and the tip of the third shaft 71 is 4 is configured so that the heating units 2b, 2c, ... Can be continuously projected and retracted so as to be projected and retracted.

(Operation) The method is used for hyperthermia treatment in substantially the same manner as in the first embodiment, but a plurality of heating sections 2b,
2c ... can be sunk and the entire length of the heating part 2 can be lengthened.

(Effect) As compared with the first embodiment, heating can be performed in a wider range. In addition, the affected area 36
Can be adjusted according to the length of.

<Seventh Embodiment> A seventh embodiment of the present invention will be described with reference to FIG. (Structure) Although the structure is almost the same as that of the first embodiment, the difference from the first embodiment is that the first electrode provided at the tip portion of the first shaft 5, the cover for the first electrode, and the temperature sensor are eliminated. That is, the first applicator 1 does not have the first heating part in the first embodiment, and the heating part 2 is provided only at the tip of the second shaft 11 protruding and retracting from the tip of the first shaft 5.
Is formed.

(Operation) Used in the same manner as in the first embodiment. According to the length of the affected part 36, the slide adjusting device 26 adjusts the length of the second shaft 11 protruding from the tip of the first shaft 5.

(Effect) Since the electrode provided at the tip of the first shaft 5, the cover for the electrode and the temperature sensor are eliminated, the in-body applicator 1 can be manufactured more easily than in the first embodiment.

<Eighth Embodiment> An eighth embodiment of the present invention will be described with reference to FIGS. (Structure) The internal applicator 1 of this embodiment is the seventh
The configuration is almost the same as that of the embodiment, but the following points are different. A cooling water passage 75, through which cooling water can circulate, is provided around the second electrode 13 at the tip of the second shaft 11, and means for cooling the electrode is provided. The portion of the cooling water channel 75 is covered with a balloon 76 made of a material such as a thin silicon film having good shrinkability. As shown in FIG. 10, the balloon 76 is covered with the distal end of the balloon being the second shaft 1.
1 and the balloon proximal end is adhered to the distal end of the first shaft 5. A cooling water inlet 77 is formed at the tip of the second shaft 11. A cooling water supply passage 78 communicating with the cooling water inlet 77 is formed in the second shaft 11.

Further, the first shaft 5 and the second shaft 11
A cooling water return passage 79 is formed by the gap therebetween. The cooling water return passage 79 communicates with the cooling water passage 75 formed inside the balloon 76.

FIG. 11 shows the connecting portion 4 of the internal applicator 1. A conduit adapter 8 is provided at the end of the first shaft 5 on the proximal side.
1 is screwed in and fixedly mounted. The rear end of the first shaft 5 penetrates the rear wall of the conduit adapter 81 and projects to the outside. The penetrating portion of the second shaft 11 is liquid-tightly sealed by a seal member (O ring) 82. However, the proximal end of the second shaft 11 is connected to the slide adjusting device 26 similar to the above.

A supply tube 83 communicating with the cooling water supply passage 78 is connected to the rear end of the second shaft 11, and a supply mouthpiece 84 is attached to the leading end of the supply tube 83. A return tube 85 communicating with the cooling water return passage 79 is connected to the conduit adapter 81, and a return cap 86 is attached to the leading end of the supply tube 83. 87 in FIG.
Is a relay wire for connecting the temperature sensor 19 to the temperature sensor connector 22.

(Operation) The operation is almost the same as that of the seventh embodiment, except that the electrode 13 of the heating section 2 is cooled by the cooling water flowing through the cooling water passage 75 around the electrode 13 during heating. Further, when the second shaft 11 is projected to the distal end side, the balloon 76 also expands accordingly.

(Effect) Since the cooling water passage 75 is provided, the surface temperature of the affected area can be lowered as compared with the seventh embodiment, so that the deeper area can be heated.

<Ninth Embodiment> The ninth embodiment of the present invention will be described with reference to FIG. (Structure) The structure is almost the same as the internal applicator 1 of the eighth embodiment, except that the distal end of the balloon 76 is
Both of the proximal ends are bonded to the member of the second shaft 11. Therefore, the cooling water return passage is the second shaft 11
It is formed so as to be partitioned from the cooling water supply passage 78. The cooling water outlet 88 is also formed at the tip of the second shaft 11. The cooling water inlet 77 is located closer to the tip side than the cooling water outlet 88, and the cooling water inlet 77 and the cooling water outlet 88 are arranged so as to be separated as much as possible in the balloon 76.

(Operation) The operation is almost the same as that of the eighth embodiment, but in this embodiment, when the warming portion 2 of the second shaft 11 is housed in the inside thereof from the tip of the first shaft 5, the first portion together with the balloon 76 is moved. 1 It is to pull in the shaft 5.

(Effect) In addition to the same effect as the eighth embodiment, the balloon 76 is pulled into the first shaft 5. Therefore, the balloon 76 does not get in the way when the internal applicator 1 is inserted into the lumen.

<Tenth Embodiment> A tenth embodiment of the present invention will be described with reference to FIG. (Structure) The structure is almost the same as that of the eighth embodiment, but the difference is as follows. That is, the first shaft 5
Two shafts 11a and 11b that are inserted through the shaft 11a are provided. The shaft 11a located at the center of the first shaft 5 is provided with the same second electrode 13 for heating and the cooling water inlet 77 as described above. The cooling water return passages have shafts 11a, 11
It may be formed in b, or may be formed by a gap between the first shaft 5 and the second shaft 11 as in the eighth embodiment.

An auxiliary electrode, for example, a coil electrode 89 is provided so as to project at the tip of the shaft 11b arranged laterally. The power supply line (not shown) of the coil electrode 89 is guided to the connection portion 4 through the inside of the shaft 11b. The electrode lead-out port of the shaft 11b is sealed by adhesion or the like to prevent water from entering.

(Operation) The operation is almost the same as that of the eighth embodiment, except that the two shafts 11a and 11b are operated separately while heating the second electrode 13 and the coil electrode 89. The positional relationship is changed, and high-frequency voltage is applied to both of them at the same time to change the high-frequency distribution around the electrodes.
Further, the magnitude of the high frequency voltage may be individually changed to change the high frequency distribution around the electrodes. Further, a high frequency voltage can be selectively supplied to the electrodes 13 and 89 to change the high frequency distribution around the electrodes.

(Effect) The high frequency distribution around the electrodes can be changed according to the condition of the affected area. In addition, the coil electrode 89
Since the power supply line of 1 hardly contacts the cooling water, there is less concern about rust and the like, and it is possible to limit the part that is firmly watertight to the part inside the balloon.

<Eleventh Embodiment> An eleventh embodiment of the present invention will be described with reference to FIG. (Structure) The structure is almost the same as that of the eighth embodiment, but the difference is as follows. That is, the first shaft 5
Two shafts 11a and 11b that are inserted through the shaft 11a are provided, and a cooling water inlet 77 is provided on the shaft 11a located at the center of the first shaft 5. Shaft 1 for cooling water return path
It may be formed in 1a, 11b, or may be formed by a gap between the first shaft 5 and the second shaft 11 as in the eighth embodiment.

An electrode, for example, a coil electrode 89 is provided at the tip of the other shaft 11b so as to project therefrom. The electrode lead-out port of the coil electrode 89 is sealed by adhesion or the like to prevent water from entering.

(Operation) Although it is almost the same as the eighth embodiment, the difference is that the length of the electrode 89 is adjusted while operating the two shafts 11a and 11b separately.

(Effect) Since the power supply line of the coil electrode 89 hardly contacts the cooling water, the fear of rust or the like is reduced, and the portion which is firmly watertight can be limited to the inner portion of the balloon.

[Supplementary Notes] (1) In a thermotherapy applicator for inserting into a lumen and applying high-frequency waves to an affected area by an electrode section for thermotherapy, a first shaft to be inserted into the lumen and a first shaft A second shaft inserted into the shaft and thinner than the first shaft;
An operation unit having a function of causing the tip end portion of the second shaft to project from the tip end of the first shaft and a function of storing the protruding tip end portion in the first shaft, and a second protrusion protruding and retracted from the first shaft. An applicator for hyperthermia treatment, comprising: a high-frequency heating electrode arranged at the tip of the shaft.

(2) In the thermotherapy applicator described in appendix 1, the electrodes are arranged on both the first shaft and the second shaft, and the electrode and the second shaft provided on the first shaft are provided. An applicator for hyperthermia treatment, characterized in that the electrode provided on the shaft is selectively used to output a high frequency.

(3) The applicator for hyperthermia treatment according to item 1, which is provided with a means for cooling the electrode. (4) The thermotherapy applicator according to appendix 1, wherein each shaft is provided with a channel penetrating the inside thereof. (5) The thermotherapy applicator according to the additional item 1, wherein a temperature sensor is provided on a heating portion in which the electrode is arranged.

[0067]

As described above, according to the thermotherapy applicator of the present invention, the distal end portion of the second shaft is projected from or retracted from the distal end of the first shaft so as to be stored in the lumen. The form of the high-frequency heating electrode can be changed to an optimum state according to the above condition. For example, since the effective length of the electrode can be arbitrarily changed, the heating distribution can be changed according to the length of the affected area. In addition, by forming the tip electrode part of the applicator with a thin second shaft, the insertion of the electrode part into the narrowed part was facilitated, and the adhesion with the lumen was also improved, enabling efficient heating. . And
A single in-body applicator has made it possible to perform more efficient heating treatment.

[Brief description of drawings]

FIG. 1A is a side view of the entire in-body applicator according to the first embodiment, and FIG. 1B is a vertical cross-sectional view of a tip portion of the in-body applicator.

FIG. 2 is an explanatory diagram of a usage state of the thermotherapy device using the internal applicator according to the first embodiment.

FIG. 3A is a side view of the entire in-vivo applicator according to the second embodiment, and FIG. 3B is a vertical cross-sectional view of the tip of the in-vivo applicator.

FIG. 4 is a side view of the entire in-body applicator according to the third embodiment.

FIG. 5 is a sectional view of an internal applicator according to a fourth embodiment.

FIG. 6 is a side view of the entire in-body applicator according to the fifth embodiment.

FIG. 7 is an explanatory view of a hyperthermia treatment apparatus main body according to the fifth embodiment.

FIG. 8 is a side view of an insertion portion of the internal applicator according to the sixth embodiment.

FIG. 9 is a side view of the entire in-body applicator according to the seventh embodiment.

FIG. 10 is a side view of the entire in-body applicator according to the eighth embodiment.

FIG. 11 is a sectional view of a connecting portion of the in-body applicator according to the eighth embodiment.

FIG. 12 is a side view of the distal end portion of the internal applicator according to the ninth embodiment.

FIG. 13 is a side view of the distal end portion of the internal applicator according to the tenth embodiment.

FIG. 14 is a side view of the distal end portion of the internal applicator according to the eleventh embodiment.

[Explanation of symbols]

1 ... Internal applicator, 2 ... Heating part, 3 ... Inserting part, 4 ...
Connection part, 5 ... 1st shaft, 6 ... 1st electrode, 7 ... Electrode lead wire, 11 ... 2nd shaft, 13 ... 2nd electrode, 18,
19 ... Temperature sensor, 26 ... Slide adjusting device.

Claims (1)

[Claims] 1. A thermotherapy applicator which is inserted into a lumen and applies high frequency waves to an affected area by an electrode section to perform a thermotherapy, and a first shaft inserted into the lumen and inserted into the first shaft. A second shaft thinner than the first shaft, and a function of causing the tip of the second shaft to project from the tip of the first shaft and a function of storing the projecting tip in the first shaft. An applicator for hyperthermia treatment, comprising: operating means; and a high-frequency heating electrode arranged at the tip of a second shaft projecting and retracting from the first shaft.