JPH0444775A - Heating treating device - Google Patents

Abstract

PURPOSE:To eliminate the possibility of forming the stagnation part of a coolant in a coolant refluxing passage and smoothly send the coolant by refluxing the coolant in a refluxing passage between an outer tube and an inner tube and in the internal passage of the inner tube at the time of heating treatment by microwaves. CONSTITUTION:A coolant refluxing means for continuing a ring passage 14 between an outer tube and an inner tube to the internal passage 15 of the inner tube, and refluxing a coolant in the ring passage 14 and in the internal passage 15, is provided. Namely, at the time of heating treatment by microwaves, the coolant is refluxed in the ring passage 14 between the outer tube and the inner tube and in the internal passage 15 of the inner tube. Thus, the stagnating part of the coolant is never formed in the coolant refluxing passage, the coolant can be smoothly sent, and a part of the tube cavity can be prevented from being unnecessarily locally heated.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a thermotherapy device for treating an affected area of a body cavity, such as cancer, by heating it with microwaves.

[Prior Art] It is generally known that cancer cells generated in a body cavity gradually die when heated to 43°C. Furthermore, thermotherapy is also known, which shrinks the enlarged prostate by heating the enlarged prostate. Then, the affected area, such as cancer or prostatic hypertrophy, that has grown in the body cavity is heated with microwaves to kill cancer cells at 43°C.
As a thermal treatment device that selectively kills the enlarged prostate by heating it or shrinks the enlarged area by heating it, for example, Japanese Patent Laid-Open No. 59-57650 and Utility Model Laid-Open No. 63-1
No. 09152 is disclosed.

In this case, in order to prevent the affected area from being heated to a temperature higher than the treatment temperature during thermotherapy in which the affected area in the body cavity is heated using microwaves, the device of JP-A-59-57650 is A balloon is provided outside the antenna portion of the ultra-short wave radiation antenna, and a cooling liquid is supplied and discharged into the balloon.

In addition, in the device disclosed in Japanese Utility Model Application No. 63-1091.52, a separator is inserted inside a cylindrical body for intraluminal insertion to be inserted into a body cavity, and an electrode part is disposed at the tip of this separator. A cooling fluid circulation path is formed inside the insertion cylinder by the separator and the electrode section. In this case, a pair of coolant circulation passages partitioned by a separator and an electrode part are formed inside the cylindrical body for insertion into a cavity. Then, a coolant supply path is formed on one side of these pair of coolant circulation passages, and a coolant discharge path is formed on the other side, so that the coolant is circulated from the coolant supply path side to the coolant discharge path side. There is.

[Problem to be solved by the invention] In the device disclosed in Japanese Patent Application Laid-Open No. 59-5765O, the water supply pipe is located within the balloon at a position away from the center of the microwave antenna, so cooling water is distributed evenly within the balloon. There was a problem that it was difficult to flow.

Therefore, there was a possibility that the entire inner circumferential surface of the lumen heated by microwaves could not be uniformly cooled. Furthermore, there is a risk that a cooling water stagnant portion may form in a portion of the balloon, and the temperature of this portion may rise, causing the portion of the lumen heated by the microwave to be heated more than necessary.

In addition, in the device disclosed in Japanese Utility Model Application Publication No. 63-109152, a circulation passage for the coolant is formed inside the tube for intracavitary insertion, so a stagnation part of the coolant is formed inside the tube for intracavitary insertion. It will not be done. However, in this case, the temperature of the coolant flowing in the coolant discharge path is higher than that of the coolant flowing in the coolant supply path of the tube for insertion into the cavity, so the temperature of the coolant flowing in the coolant discharge path is higher than that in the coolant supply path side. There was a problem that the cooling capacity on the side of the coolant discharge path decreased. Therefore, in this case as well, the entire inner circumferential surface of the lumen heated by microwaves cannot be uniformly cooled, and there is a risk that a portion of the lumen may be heated more than necessary.

This invention was made in consideration of two circumstances, and the first objective is to allow the coolant to flow smoothly without the risk of a coolant stagnation forming in the coolant return flow path. To provide a thermotherapy device capable of uniformly cooling the entire inner circumferential surface of a lumen and preventing a part of the lumen from being locally heated more than necessary. There is a particular thing.

[Means for Solving the Problems] The present invention includes an outer tube made of an insulator whose tip end is sealed with a sealing member, an inner tube made of an insulator disposed inside the outer tube, and an inner tube made of an insulator disposed inside the outer tube. a microwave antenna provided at the tip of a coaxial cable inserted into the tube and placed on the tip side of the inner tube;
a microwave supply means for supplying microwaves to the microwave antenna via the coaxial cable, communicating between an annular flow path between the outer tube and the inner duplex and an inner flow path of the inner tube; A coolant reflux means for refluxing the coolant is provided in each of the annular flow path and the internal flow path.

[Function J: During heating treatment using microwaves, the cooling liquid is circulated between the annular flow path between the outer tube and the inner tube and the internal flow path of the inner duplex, so that the cooling liquid is returned to the inside of the coolant return flow path. The coolant can flow smoothly without forming a stagnation part of the coolant. In this case, by forming the annular flow path between the outer tube and the inner tube, the temperature distribution of the cooling liquid in the annular flow path is maintained in a substantially similar state in the circumferential direction, and The temperature distribution on the outer circumferential surface of the outer tube in contact with the surface is maintained in a substantially similar state in the circumferential direction to prevent a portion of the lumen from being locally heated more than necessary. be.

C Embodiment FIGS. 1 to 6 show a first embodiment of the present invention. FIG. 2 shows a schematic configuration of the entire thermotherapy device for heating, for example, an enlarged prostate, and 1 is a microwave probe for thermotherapy.

As shown in FIG. 1, the probe body 2 of the microwave probe 1 includes an outer tube 3 made of an insulator and an inner tube 4 made of an insulator such as plastic or rubber disposed inside the outer tube 3. and is provided. In this case, the distal end of the outer tube 3 is sealed with a cap (sealing member) 5 made of an insulator. A substantially cylindrical small-diameter protrusion 5a is formed at the base end of the cap 5. The distal end portion of the inner tube 4 is fitted onto the protruding circular portion 5a of the cap 5.

Further, a coaxial cable 6 is inserted through the inside of the inner tube 4. A microwave antenna 7 disposed on the tip side of the inner tube 4 is provided at the tip of the coaxial cable 6 . In this case, at the tip of the coaxial cable 6, the outer conductor 8 is exposed by peeling off the jacket tube 6a by, for example, 50 mm.

Further, the exposed portion of the outer conductor 8 is cut at the center to form a gap 9. The exposed part of the outer conductor 8 is a part 8a connected to the outer conductor 8 side in the coaxial Kelp 6, and a part 8b completely separated from this part 8a.
A portion 8b completely separated from the outer conductor 8 side is connected to the inner conductor side to form the microwave antenna 7. Further, the exposed portions 8a and 8b of the external conductor 8 are coated with, for example, silicone rubber. Furthermore, the tip of the tip side portion 8b of the exposed portion of the outer conductor 8 is connected to the inside of the cylinder of the protruding portion 5a of the cap 5.
It is inserted in b.

Further, on the outer peripheral surface of the cap 5, a stepped portion 10 for preventing the outer tube 3 from being removed and a substantially ring-shaped concave portion 1 are formed. The tip of the outer tube 3 is capped with a cap 5.
It is inserted through the stepped part 10 to the recessed part 11 position, and after the thread is fixed in the recessed part 11, the recessed part 1 is inserted.
1 is filled with adhesive to form a smooth connection between the outer tube 3 and the cap 5.

Further, a stepped portion 12 for preventing the inner tube 4 from being pulled out is formed on the outer circumferential surface of the protruding portion 5a of the cap 5, and a stepped portion 12 for preventing the inner tube 4 from being pulled out is formed on the outer peripheral surface of the protruding portion 5a of the cap 5. Two communication grooves 13... are formed. These communication grooves 13 are formed at regular intervals as shown in FIG. The annular flow path 14 between the outer tube 3 and the inner tube 4 and the internal flow path 15 of the inner tube 4 are communicated with each other by these communication grooves 13 . Note that this cap 5 has a diameter of 1 mm, for example, as shown in FIG.
．． Approximately 21 guide wire insertion holes 5c are formed, and for example, by inserting a guide wire inserted into a living body lumen using an endoscope or the like into this guide wire insertion hole 5c, the living body lumen can be easily inserted. It can be guided to a desired position within the cavity.

Moreover, a coiled member 16 made of an insulator wound in a spiral shape is inserted between the outer tube 3 and the inner tube 4. It is formed to have approximately the same length as the exposed portions 8a and 8b of the conductor 8.The outer tube 3, the inner tube 4, and the coaxial cable 6 are arranged coaxially, and the outer tube 3 The flow path cross-sectional area of the annular flow path 14 between the inner tube 4 and the inner tube 4 is formed so as to substantially match the flow path cross-sectional area of the internal flow path 15 of the inner tube 4.

Further, on the outer circumferential surface of the outer tube 3, a pair (first, second
) temperature sensor 1.7.18 is provided. In this case, the first temperature sensor 17 is placed at the maximum heating part of the outer tube 3, and the second temperature sensor 18 is placed at a position shifted by about 20 to 301 degrees toward the proximal side of the first temperature sensor 17, for example, 25I. It is located at the position of Further, a thin heat-shrinkable tube 19 is attached to the outer peripheral surface of the outer tube 3 to cover the portions other than the temperature detecting portions at the tips of the temperature sensors 17 and 18. In this case, a substantially hemispherical embedded member made of an insulator is fixed to the outer peripheral surface of the outer tube 3 at a position closest to the microwave antenna 7 on the proximal side. Then, the heat shrink tube 19 is connected to the temperature sensor 1.7.
．． It is passed through the part other than the temperature detection part at the tip of temperature sensor 18 and the outside of this embedded member 5, and is fixed by heat shrinking with the temperature detection part at the tip of temperature sensor 17.18 exposed to the part 4 side. . At this time, a substantially hemispherical protrusion 20 that protrudes outward is formed on a portion of the heat shrink tube 19 by the substantially hemispherical embedded member. The protrusion 20 is located approximately 101 degrees closer to the user's hand than the temperature detection section of the second temperature sensor 18. In addition, a temperature sensor f]7, which is exposed on the outside side of one heat shrink tube,
A silicon adhesive (not shown) is applied to the temperature sensor 114 at the tip of the sensor 18 to form a smooth curved surface with no steps.

In addition, Figure 5 shows the probe body 2 of the microwave probe 1.
This figure shows the schematic configuration of the proximal end of the .

In FIG. 5, reference numeral 21 denotes a cover member made of an insulator connected to the proximal end of the outer tube 3 of the probe body 2 (Z).

Inside this cover member 21, there is an outer chi.

- fixing member 22 of tube 3 and fixing member 2 of inner tube 4;
3 are provided respectively. In this case, the outer tube fixing member 22 and the inner tube fixing member 23 are approximately cylindrical. A male threaded portion 22a is formed on the outer circumferential surface of the outer tube fixing member 22 on the distal end side, and the outer diameter of the male threaded portion 22a is tapered so that the outer diameter gradually decreases toward the distal end. Theno Kuji 2
2b is formed.

Further, a substantially cylindrical fastener is screwed into the male threaded portion 22a of the outer tube fixing member 22 into a female threaded portion 24a formed on the inner circumferential surface of the proximal end of the member 24.

For this tightening, a tapered surface 24b having a shape corresponding to the tapered surface 22b of the outer tube fixing member 22 is formed on the inner peripheral surface of the member 24 at the distal end side of the female threaded portion 24a. and,
These tightenings are performed with the proximal end of the outer tube 3 inserted between the outer surface 24b of the member 24 and the outer surface 22b of the outer tube fixing member 22, By being screwed into the male threaded portion 22a of the outer duplex fixing member 22, the proximal end of the outer tube 3 can be tightened.
The tapered surface 24b of the first member 24 and the outer tube fixing member 2
It is fixed in a pinched state between the two inner and outer surfaces 22b.

Furthermore, a tapered tapered surface 22 is formed on the substantially central inner circumferential surface of the four-tube fixing member 22, which gradually becomes smaller as the inner diameter approaches the distal end.

In both cases, a relatively large-diameter internal thread 22cl is formed on the inner circumferential surface of the proximal end of the outer tube fixing member 22.

Further, a tapered tapered surface 23a is formed on the outer circumferential surface of the distal end side of the inner tube fixing member 23, and the outer diameter thereof gradually decreases toward the distal end side. This Te・
- The proximal end of the inner tube 4 is fitted onto the outer surface 23a. And then, inside this.

The tube fixing member 2'3 is inserted into the inside of the outer tube fixing member 22 from the opening on the proximal end side of the outer tube fixing member 22 with the proximal end of the inner tube 4 externally fitted onto the developer surface 23a. It has been inserted. Furthermore, from the opening 11 on the base end side of the outer tube fixing part O (22), the inner tube fixing member 23 is followed by a pushing member 27, which fixes the coaxial cable 6 formed of rubber or the like. A ring 29 and a pressing member 30 are respectively inserted.In this case, the pressing member 27 is formed with a male threaded portion 27a that screws into the female threaded portion 22d of the outer tube fixing portion +]22. 5, remove the male thread 27a of the pusher/1 member 27 from the tube fixing member 2.
′, ), is screwed into the female threaded portion 22d of It is fixed between the tapered surface 23a of the outer sheave fixing member 2'3 and the tapered surface 22c of the outer sheave fixing member 22 in a sandwiched state. For pressing, an adhesive is applied in advance to the threaded part between the male threaded part 27a of the member 27 and the female threaded L part 22d of the outer tube fixing member 22, and this threaded part is held in a watertight state. .

Furthermore, the inner tube fixing member 2B, the pusher f=j member 27
A coaxial cable 6 is inserted through the axes of the fixing ring 29 and the pressing member 30. An O-ring 28 for sealing is fitted onto the outer peripheral surface of the base end of the coaxial cable 6. The O-ring 28 is inserted into a recess formed on the inner peripheral surface of the front end of the member 27. Further, a mounting hole for a large diameter fixing ring 29 is formed on the base end side of the pressing member 27. The fixing ring 29 is inserted into this mounting hole, and the tip of the pressing member 30 is also inserted. A male threaded portion 30a is formed on the outer circumferential surface of the proximal end of the pressing member 30, and is screwed into the female threaded portion 22d of the outer tube fixing member 22. Then, the male threaded portion 30a of this pressing member 30 is attached to the outer tube fixing member 22.
The coaxial cable 6 is fixed to the pressing member 27 side by screwing the fixing ring 29 into the female threaded portion 22d of the fixing ring 29 and elastically deforming it by pressing the fixing ring 29 with the pressing member 30.

Further, a closing member 31 is screwed into the opening on the proximal end side of the outer tube fixing member 22 . Then, the outer tube fixing member 22 is tightened by the member 24 by this closing member 31.
The cover member 21 is fixed in a press-contact state to the front wall portion of the cover member 21 via the cover member 21 .

On the other hand, a cooling fluid injection hole 32 and a discharge hole 33 are formed in the peripheral wall of the outer tube fixing member 22 . in this case,
An injection port 34 is fixed to the outer end of the injection hole 32, and a discharge port 35 is fixed to the outer end of the discharge hole 33, respectively.

Further, the inner end side of the injection hole 32 is provided with an inner tube fixing member 23.
The inner tube 4 is connected through the radial communication hole 36 formed in the cylindrical wall of the inner tube 4 and the axial communication hole 26 between the inner peripheral surface of the inner tube fixing member 23 and the outer peripheral surface of the coaxial cable 6. It communicates with the internal flow path 15 .

Furthermore, the inner end side of the discharge hole 33 is connected to the outer tube fixing member 2.
The inner tube 2 is connected to the annular flow path 14 between the outer tube 3 and the inner tube 4 through an axial communication hole 25 between the inner circumferential surface of the inner tube 2 and the outer circumferential surface of the inner tube 4 . And injection port 3
4 has a liquid feeding tube 37 and a discharge port 35 shown in FIG.
One end of each drain tube 38 is removably connected to the drain tube 38 . The other ends of the liquid feeding tube 37 and the liquid draining tube 38 are connected to a reservoir 39 . In addition, a pump 40 is installed in the middle of the liquid feeding tube 37.
is interposed. As the pump 40 operates, the coolant in the reservoir 39 is supplied to the internal channel 15 of the inner tinib 4 through the liquid feeding tube 37, the injection port 34, the injection hole 32, and the communication hole 36.26. Also, an annular flow path 14 between the outer tube 3 and the inner tube 4
The coolant inside is connected to the communication hole 25, the discharge hole 33, and the discharge port 35.
, and is returned to the reservoir 39 via the drain tube 38 in sequence.

In addition, the base end side of the coaxial cable 6 is connected to a microwave oscillator (
(microwave supply means) 41. This microwave oscillator 41 is connected to a controller 42 formed by, for example, a microcomputer and its peripheral circuits. Furthermore, the first. second temperature sensor 17,
The base end side of the heat shrink tube 18 is drawn out from the base end side of the heat shrink tube 19 and is connected to the thermometer 43 . This thermometer 43 is connected to the controller 42.

And the first. The output of the microwave oscillator 41 is controlled by the controller 42 based on detection signals from the second temperature sensors 17 and 18.

Next, the operation of the above device will be explained.

First, the pump 40 is driven to flow a cooling liquid such as pure water, distilled water, deaerated water, etc. into the microwave probe 1 to remove bubbles inside.

Next, the microwave probe 1 is inserted into the urethra 44 to the desired position as shown in FIG. In this case, the operator inserts a finger 46 into the patient's rectum 45 and
Check the insertion amount. That is, by stopping the insertion of the microwave probe 1 when it is confirmed with the fingers 46 that the protrusion 20 of the microwave probe 1 has reached the sphincter muscle portion below the prostate 47, the microwave probe 1 is moved to the target position. It is possible to insert up to

Then, in this state, the microwave oscillator 41 is driven to start thermal treatment in which the prostate 47 is heated with microwaves.

In this case, the first temperature sensor 17 measures the temperature of the mucous membrane of the urethra within the prostate gland 47, and the controller 42 adjusts the detected temperature from the sensor 7 to 40 to 42.
The output of the microwave oscillator 41 is controlled so that the temperature is maintained at .degree.

Therefore, the temperature of the mucous membrane of the prostate 47 internal urethra is 40-42
The deep prostate gland 47 is heated to 43-44°C, and the tumor is thermally treated. At this time, the second temperature sensor 18 measures the temperature of the sphincter muscle [1] and monitors it so that the temperature is maintained at a temperature that does not damage the sphincter muscle.

Therefore, in the case of the above-mentioned structure, during heating treatment using microwaves, a cooling liquid is inserted between the annular flow path between the row tube 3 and the inner tube 4 and the inner flow path 15 of the inner tube 4. Since the cooling liquid is refluxed, no stagnation of the coolant is formed in the coolant reflux channel of the microwave probe, and the coolant can flow smoothly. In this case, since the annular flow path 4 is formed between the outer tube 3 and the inner tube 4, the temperature distribution of the coolant in the annular flow path 14 is maintained in a substantially similar state in the circumferential direction. Kotoka C Kiruru.

Therefore, the temperature of the outer circumferential surface of the outer tube 3 in contact with the inner circumferential surface of the biological lumen can be maintained in a substantially -like state throughout the circumferential direction, so that a part of the biological lumen can be can be prevented from being locally heated more than necessary.

In addition, since the cooling liquid flows along the outer circumferential surface of the coaxial cable 6, heat generation due to power loss in the coaxial cable 6 and the pull 6 is suppressed, and the lumen of the body other than the affected area is prevented from being heated. I can do it.

Further, since the outer tube 3 and the inner tube 4 are made of a flexible insulator such as plastic or rubber, they can be easily inserted into a curved living body lumen, and operability can be improved.

Furthermore, since the flexibility of the microwave probe 1 can be adjusted by combining the outer tube 3 and the inner tube 4, it is possible to manufacture microwave probes with optimum flexibility for various parts. .

Furthermore, since the second temperature sensor 18 measures the temperature of the sphincter muscle and monitors the temperature to keep it at a temperature that does not damage the sphincter muscle, it is possible to prevent damage to the sphincter muscle.

In addition, since the coiled part +A16's made of an insulator wound approximately spirally between the outer tube 3 and the inner tube 4 is inserted, even if the microwave probe 1 is bent, the row tube 3 The central axes of the inner tube 4 and the inner tube 4 do not shift.

Therefore, even if the microphone is bent, there is no change in the coolant flow or cross-sectional area even if the probe 1 is bent.It is possible to uniformly cool the microphone even within the body cavity.

Furthermore, since the cooling liquid in the annular flow path 14 between the outer tube 3 and the inner tube 4 flows approximately spirally along the coiled member 6, the entire circumference of the microwave probe can be reliably cooled. I can do it.

Also, 1st. Second temperature sensor 1f, 1. ．． 8 is set at 25 wm, the temperature of the mucous membrane of the urethra inside the prostate gland 47 can be measured by the first temperature sensor 17, and the temperature of the sphincter muscle can be measured by the second temperature sensor 18. During thermal treatment using waves, it is possible to maintain a temperature that does not damage the sphincter muscles.

In addition, in the embodiment described in -1-, the cooling liquid is shown to flow from the internal flow path 15 side of the inner tube 4 to the annular flow path 14 side between the outer tube 3 and the inner tube =-/4. 1. In a configuration in which the water flows from the annular flow path 14 side to the internal flow path 15 side of the inner tube 4. But it's okay. In this case, the cooling liquid can increase the cooling capacity of the outer circumferential surface of the microwave probe 1, so that the microwave can be oscillated with an output that is more accessible to people. Therefore, the range of heating by microwaves can be widened.

Furthermore, the coiled member 16 may be formed of an X-ray opaque portion H such as sulfuric acid/.7noium, so that the position of the J microwave antenna 7 can be confirmed on X-rays.

Further, FIG. 7 shows a second embodiment of the present invention.

This is the center axis 0. of the coaxial cable 6. The position of the first temperature sensor 17 is eccentric from the central axis 02 of the row tube 3 and the inner tube 4, and the first temperature sensor 17 is
The coaxial cable 6 is placed on the outer peripheral surface of the coaxial cable 6 at a location closest to the coaxial cable 6. In this case, outer tube 3 and inner tube 4
are arranged coaxially.

Therefore, in this case, from the position of the central axis 02 of the outer tube 3 and the inner tube 4 to the central axis 0 of the coaxial cable 6.
Since the microwave heating in the direction of the eccentric position 1 can be strengthened, for example, if the enlarged part of the prostate gland 47 is biased toward one side of the lumen, the microwave heating can be applied in accordance with the direction of the enlarged part. can be heated more strongly, and the effect of thermotherapy can be improved. In this case, the temperature of the part heated to the highest temperature can be measured by the first temperature sensor] 7, and the flow rate of the coolant can be controlled based on the detected temperature from the first temperature sensor 17. ,
Safety can be further improved.

Furthermore, FIG. 8 shows a third embodiment of the present invention.

In this example, the inner tube 4 of the second embodiment is formed by a two-lumen tube 51.

A pair of holes (lumens) 53 and 54 are provided in the tube body of the two-lumen tube 51, which are partitioned by a partition wall 52 and extend parallel to the axial direction. The coaxial cable 6 is inserted into one of the holes 54.

Therefore, in this case as well, the same effects as in the second embodiment can be obtained.

Further, FIG. 9 shows a fourth embodiment of the present invention.

In this case, the outer tube 3 of the first embodiment is formed by a 5-lumen tube 61.

Main lumen 62 in the center of this 5 lumen tube 61
An inner tube 4 is inserted into the inner tube 4.
A coaxial cable 6 is arranged at the center of the shaft. In this case, the four sub lumens 63... are the main lumens 62.
A temperature sensor is inserted into this sub-lumen 63. Further, this sub-lumen 63 is filled with an insulating filler such as silicon.

Therefore, in this case, since the temperature sensor is inserted into the sub-lumen 63, there is no fear that a protrusion such as a temperature sensor will be formed on the outer peripheral surface of the microwave probe 1, and the insertion into the body cavity can be performed smoothly. be able to.

Furthermore, FIG. 10 shows a fifth embodiment of the present invention.

In this embodiment, a plurality of concave grooves 71 extending in the axial direction are provided on the outer circumferential surface of the outer tube 3 of the first embodiment, and a temperature sensor is mounted within the grooves 71.

In this case, the temperature sensor in the groove 71 is fixed by the filler, and the surface of the filler is maintained in a state in which it is smoothly continuous with the outer peripheral surface of the outer tube 3.

Therefore, in this case, the groove 71 allows the outer tube 3
Since the projections are formed on the inner peripheral surface side of the tube, the distance between the outer tube 3 and the inner tube 4 can be kept substantially constant by these projections. Therefore, it is possible to prevent the center axes of the outer tube 3 and the inner tube 4 from shifting when the microwave probe 1 is bent, and the cross-sectional area of the coolant flow path does not change even when the microwave probe 1 is bent. Therefore, uniform cooling can be achieved even within a curved living body lumen.

Further, FIG. 11 shows a first disclosed example.

In the figure, 81 is a coaxial cable for microwave transmission of a thermotherapy applicator, 82 is the center conductor of this coaxial cable 81, 83 is an outer conductor, 84 is a folded dipole antenna section, and 85 is the tip of this coaxial cable 81. A distal end cap 86 with a guide wire insertion hole connected to the coaxial cable 81 is a connector connected to the proximal end of the coaxial cable 81. In this case, the folded dipole antenna section 84 has a folded part 87 formed by folding back the tip of the outer conductor 83 of the coaxial cable 81.
The tip of the center conductor 82 protrudes from the tip side. Eight X-ray contrast members formed of tubes made of barium sulfate, for example, are attached around the protruding tip of the center conductor 82. Note that 88 is an insulating coating tube attached to the outer peripheral surface of the coaxial cable 81.

I. Therefore, in this case, the position of the X-ray contrast member 89 can be displayed on the XIJ monitor J.
The position of the folded dipole antenna portion 84 of the thermotherapy applicator can be accurately identified by the display position of the line contrast member 89. Therefore, erroneous operation of the thermotherapy applicator can be prevented, and the therapeutic effect of thermotherapy can be improved.

Furthermore, FIG. 12 shows a second disclosed example.

This is provided with a slit-type antenna section 92 on a coaxial cable 91 for microwave transmission of a thermotherapy applicator.
X-ray contrast members 95 and 96 are attached to the antenna tip of the slit-type antenna section 92 and the slit section 94, respectively. In this case, the exposed portion of the outer conductor 93 exposed at the tip of the coaxial cable 9 is cut at the center to form a slit portion 94 . and,
The exposed part of this external conductor 9B is a part 93a connected to the external conductor 913 side in the coaxial gel pull 91, and this part 03a.
It is completely separated from the seven parts 93b,
A portion 93b that is completely separated from this external conductor 9″-3 side
is connected to the inner conductor side to form a microwave antenna section 92. Note that 97 is a tip end cap with a guide wire insertion hole 44 connected to the tip end of the coaxial cable 9, and 98 is a connector connected to the base end of the coaxial Y-pull 9.

In this case as well, the same effects as in the first disclosed example can be obtained.

Further, FIG. 13 does not show the third disclosed example.

In this method, a slit-type antenna section 1.01 is provided on a coaxial cable 100 for microwave transmission of an applicator for thermotherapy, and a first temperature sensor 103 is attached to the slit section of this antenna section 101. A second temperature sensor 104 is attached to the rearmost end of the sensor. In this case, the distance L1 between the tip end of the antenna section 101 and the slit section is, for example, 25I2.
The distance L2 between the rear end of 01 is, for example, 2'l'zn
m, respectively. Furthermore, a roof 102 for position fixing is attached to the tip of the coaxial cable 100.

(In this case, biological tissue is Unnecessary heating can be prevented and safety can be improved.

Furthermore, FIG. 14 shows a fourth disclosed example.

This is done by providing a pair of slits in the slit-type antenna part 111 of the coaxial cable 110 for microwave transmission of the applicator for thermotherapy, and attaching the first temperature sensor 103 to the slit part on the rear side. , a second temperature sensor 1.04 is installed at the rearmost end of the antenna section 111. In this case, the total length of the antenna section l1.l is set to, for example, 501gl11.

Further, FIG. 15 shows a fifth disclosed example.

This is a dipole antenna section 121 of a coaxial Y-pull 120 for microphone 0/& transmission of a thermotherapy applicator.
0') Attach temperature setting 103 to the first folded part (
7. Second temperature sensor 1 at the rear end of the antenna section 111
04 is installed. In this case, the antenna section 12
] is set to, for example, 2'Tm+m.

In the case of these fourth and fifth disclosed examples, the same effect as the '3rd disclosed example 5 can be obtained.

It should be noted that the present invention is not limited to the embodiments described above, and various modifications can be made without changing the gist thereof.

[Effects of the invention According to this invention, ζJ5 during heating treatment by microwave
Since the coolant was refluxed between the annular flow path between the PI duplex and the inner tube and the inner flow path of the inner tube, there was a risk that a stagnation part of the coolant would be formed in the coolant reflux flow path. This allows the coolant to flow smoothly. moreover,
An annular flow path is formed between the outer tube and the inner tube, and the temperature nj of the coolant in the annular flow path is maintained in a substantially -like state in the circumferential direction, so that the entire inner peripheral surface of the lumen is Uniform cooling can be achieved, and it is possible to prevent a portion of the lumen from being locally heated more than necessary.

[Brief explanation of drawings]

1 to 6 show a first embodiment of the present invention, and FIG. 1 is a longitudinal sectional view showing the main part configuration of a thermotherapy device;
Figure 2 is a schematic configuration diagram of the entire thermotherapy device, and Figure 3 is a schematic diagram of the entire thermotherapy device.
4 is a side view showing a partial cross section of the sealing member of the outer tube; FIG. 5 is a vertical sectional view showing the schematic configuration of the proximal end of the microwave probe; Fig. 6 is a schematic configuration diagram showing the state of use, Fig. 7 is a cross-sectional view of the main part showing the second embodiment of the invention, and Fig. 8 is a cross-sectional view of the main part showing the third embodiment of the invention. 9 is a cross-sectional view of the main part showing the fourth embodiment of the present invention, and FIG. 10 is the fifth embodiment of the present invention.
FIG. 11 is a vertical cross-sectional view of the main part showing the first disclosed example, FIG. 12 is a vertical cross-sectional view of the main part showing the second disclosed example, and FIG. FIG. 14 is a longitudinal sectional view of the main part showing the third disclosure example, FIG. 14 is a longitudinal sectional view of the main part showing the fourth disclosure example, and FIG. 15 is a longitudinal sectional view of the main part showing the fifth disclosure example. It is a diagram. 3...Outer tube, 4...Inner tube, 5...Cap (sealing member), 6...Coaxial cable, 14...
- Annular channel, 15... Internal channel, 41... Microwave oscillator (microwave supply means).

Claims (3)

[Claims] (1) An outer tube made of an insulator whose tip is sealed with a sealing member, an inner tube made of an insulator disposed inside the outer tube, and a coaxial cable inserted into the inner tube. a microwave antenna provided at the distal end of the inner tube and disposed on the distal end side of the inner tube; a microwave supply means for supplying microwaves to the microwave antenna via the coaxial cable; and the outer tube and the inner tube. and coolant reflux means for communicating between the annular flow path between the inner tube and the inner flow path of the inner tube, and circulating the coolant to the annular flow path and the inner flow path, respectively. Heat treatment device. (2) The thermotherapy device according to claim (1), wherein the outer tube has a coiled member made of an insulator inserted into the annular flow path between the outer tube and the inner tube. . (3) The outer tube has a first temperature sensor placed at the maximum heating part and a 20mm
A second temperature sensor disposed at a position of ~30 mm.
) The thermotherapy device described in section 2.