JPH0724690B2 - Thermotherapy probe - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a thermotherapy probe for treating a diseased part, such as cancer, generated in a body cavity with microwaves for treatment.

[Prior Art] It is known that cancer cells gradually die when heated to 43 ° C. Conventionally, a probe for hyperthermia which irradiates a diseased part with microwaves for heating has been proposed by Japanese Patent Laid-Open No. 59-57070. This hyperthermia treatment device uses a coaxial cable to form a microwave antenna section, and this antenna section uniformly radiates microwaves from the entire circumference of the microwave antenna section so that it is uniform in all directions of the lumen. It has the property of creating a heating pattern. Therefore, it is suitable when heat-treating the affected part so as to be uniform over the entire circumference of the lumen, but when the affected part is unevenly distributed in part of the lumen, it is not necessary to heat normal living tissue. Since it heats up even a part, it is not desirable and the heat treatment efficiency is poor.

On the other hand, in the Japanese Patent Publication No. 61-15903, a reflector having a slit is partially rotatably provided on the outer portion of the antenna section so that the position of the opened slit is selected and a directional micro By radiating the waves, it is possible to heat only the unevenly distributed partial affected area for treatment.

[Problems to be Solved by the Invention] In Japanese Patent Publication No. 61-15903, a reflector having a slit is rotated to select the position of the slit to reflect a directional microwave. By carrying out, it is possible to heat and treat only the unevenly distributed partial affected part.

However, since the antenna part of the probe in this Japanese Patent Publication No. 61-15903 is provided with a conductive reflector that rotates around the antenna part, and further, it is necessary to provide a dielectric dome on the outside thereof. This antenna part becomes inflexible.

Therefore, the probe having the antenna part of this kind has a drawback that it is difficult to insert the probe into a body cavity that is normally bent, and the pain of the patient when inserting is increased.

The present invention has been made to solve the above problems, and an object thereof is a flexible antenna which has a relatively simple structure but can be easily inserted and used even in a curved body cavity. (EN) Provided is a microwave probe which can form a part and can secure directivity of microwave radiation.

[Means and Actions for Solving the Problems] In order to solve the above problems, a microwave probe of the present invention includes a flexible and long probe main body in which a portion forming an antenna portion is formed of at least a dielectric, The probe body includes a microwave antenna body installed in the dielectric body of the antenna section, and a space provided in a part of the dielectric body between the microwave antenna body and the outer surface of the antenna section. It was done.

Then, the microwave antenna is installed in the flexible probe main body, and a microwave blocking space is provided in a part between the surface of the antenna and the outer surface of the probe main body. The waves can be blocked and the microwave can be efficiently radiated in the direction without the space.

[Embodiment] FIGS. 1 to 3 show a first embodiment of the present invention. In FIG. 1, reference numeral 1 is a microwave probe for thermotherapy. The microwave probe 1 is configured as follows. That is, FIGS. 2 and 3 show the vicinity of the tip of the microwave probe 1. The probe body 2 of the microwave probe 1 is the main lumen 3
And a sub-lumen 4 are formed by a two-hole tube made of an electrically insulating dielectric material having two lumens. As shown in FIG. 3, the main lumen 3 has a circular cross section along the center of the probe body 2. The sub-lumen 4 is unevenly distributed on the outer peripheral side and is concentric with the main lumen 3 and is formed in a so-called crescent shape in a cross-sectional shape elongated in an arc shape. Further, a cap 5 made of an electrically insulating dielectric material is attached and fixed to the tip of the probe body 2, and the cap 5 seals the opening of each of the main lumen 3 and the sub-lumen 4. .

A coaxial cable 6 is inserted through the main lumen 3, and an inner conductor and an outer conductor at its tip end constitute a microwave radiation antenna body 7. That is,
The tip portion of the probe main body 2 serves as an antenna portion and serves as a microwave radiating portion that irradiates microwaves to its side. The rear end of the sublumen 4 is also sealed, and air is introduced into the sublumen 4. Therefore, the sub-lumen 4 forms a microwave shielding space.

Further, a sensor hole 8 that is opened from the tip of the main lumen 3 to the outside is formed. The lead wire 9a of the temperature sensor 9 is guided from the main lumen 3 to the outer surface of the probe body 2 through the sensor hole 8 and the temperature sensor 9
The temperature sensing portion 9b is provided on the outer surface of the probe main body 2 which has the highest temperature due to the action of the microwave radiated from the antenna body 7. That is, the temperature sensing portion 9b of the temperature sensor 9 is provided on the side opposite to the sub-lumen 4.

The main lumen 3 and the sensor hole 8 are filled with the same material as that of the probe main body 2 formed of a two-hole tube or a filler 10 having the same dielectric constant.

As shown in FIG. 1, the connector 11 provided at the rear end of the microwave probe 1 has an oscillator 12 that oscillates microwaves.
And a thermometer 13 is connected. Furthermore, this oscillator
The thermometer 12 and the thermometer 13 are electrically connected to the controller 14, and the output of the oscillator 12 can be adjusted based on the data of the temperature measured by the thermometer 13.

Next, the operation of the above-mentioned constituent device in use will be described. First,
As shown in FIG. 1, the microwave probe 1 is inserted into the lumen 16 of the living body 15 up to a site where the affected area 17 exists. Therefore, the radial direction of the microwave probe 1 is adjusted to the affected part 17. The radial direction of the microwave probe 1 is the outer circumference on the outer surface of the probe main body 2 excluding the portion where the sub-lumen 4 is present. Since air is contained in the sub-lumen 4, the microwave radiated from the antenna body 7 is unlikely to pass through the sub-lumen 4 side, and therefore the upper part of the outer surface of the probe main body 2 excluding the part where the sub-lumen 4 is present. Shows the directivity of microwave radiation. That is, the alignment is performed so that the affected part 17 is located in the direction in which the microwave is radiated.

Therefore, the control unit 14 is operated to drive the oscillator 12 to oscillate microwaves, thereby irradiating the affected area 17 with microwaves from the antenna body 7 to heat the affected area 17. As described above, the microwave traveling toward the sub-lumen 4 side is reflected by the air in the sub-lumen 4, so that the microwave is not emitted in that direction. That is, the affected part 17 is radiated intensively to heat the affected part 17. The temperature of the affected part 17 is measured by the thermometer 13 using the temperature sensor 9. The temperature information obtained by the thermometer 13 is sent to the control unit 14. The control unit 14 continues the thermal treatment while adjusting the output of the oscillator 12 according to the detected temperature.

With this configuration, the following operational effects can be obtained. First, since it is difficult for microwaves to radiate toward the sub-lumen 4 side, it is possible to perform directional heating in a fixed direction. Therefore, if the affected area 17 is biased,
Only the affected part 17 is intensively heated, and normal living tissue parts other than the affected part 17 are not unnecessarily heated. For example, when there are various directions of hypertrophy such as prostatic hypertrophy, the microwave probe 1 can be inserted transurethrally and the microwave probe 1 can be used together in the direction of large enlargement, so that the prostate hypertrophy can be effectively achieved. It can be used to treat illness.

Further, since the sub-lumen 4 is provided in the probe main body 2 and the air is introduced into the sub-lumen 4 to shield microwaves, a special reflector is not required, so that the structure is simple and the diameter can be reduced. In addition, since a hard reflector is generally unnecessary, the flexibility of the tip can be secured. Further, there is only a two-hole tube member constituting the probe main body 2 on the outside of the antenna body 7, which has higher flexibility and can be easily inserted into a bent lumen for use. 1 can be provided.

If the sub-lumen 4 is left unsealed without being sealed, it can be used as a forceps hole or a suction hole.

4 to 6 show a second embodiment of the present invention. In this embodiment, as shown in FIGS. 5 and 6, the probe main body 2 is constituted by a three-hole tube composed of the main lumen 3, the first sub-lumen 4a and the second sub-lumen 4b, which is the above-mentioned It differs from that of the first embodiment. Tip cap 5, microwave radiation antenna body 7,
The sensor hole 8, the temperature sensor 9 and the filler 10 are provided in the same manner as in the first embodiment. Further, the oscillator 12, the thermometer 13, and the control unit 14 connected to the microwave probe 1 are also provided in the same manner as in the first embodiment.

The first sub-lumen 4a and the second sub-lumen 4b are respectively formed on the outer side of the main lumen 3 so as to be concentric with the main lumen 3 and have a cross-sectional shape elongated in an arc shape, that is, a crescent shape. . Further, the tips of the first sub-lumen 4a and the second sub-lumen 4b communicate with each other through a communication passage (not shown) formed in the tip cap 5.

The first sub-lumen 4a is connected to the liquid feeding tube 21 shown in FIG. 4 at the end of the microwave probe 1. A roller pump 23 having a flow direction changeover switch 22 is inserted in the liquid supply tube 21. The end of the liquid supply tube 21 is placed in a low-loss dielectric material, such as silicone oil 25, stored in a reservoir 24. That is, these constitute means for selectively filling the dielectric in the space of the sub-lumens 4a, 4b.

The second sub-lumen 4b is the end of the microwave probe 1 and is connected to the drainage tube 26.
The end of 26 is placed above the liquid level of the silicone oil 25 in the reservoir 24.

Next, the operation of the device thus configured will be described. First, the spread of the lumen 16 of the living body 15 in the circumferential direction of the affected area 17 is diagnosed.

Then, when the affected area 17 exists over the entire circumference, the following operation is performed. That is, the roller pump 23 is driven to transfer the silicone oil 25 in the reservoir 24 to the liquid feeding tube 21.
Through the first sub-lumen 4a to the second sub-lumen
4b, and the first sub-lumen 4a and the second sub-lumen 4b are filled with silicone oil 25.

Therefore, the microwave probe 1 is inserted into the lumen 16 of the living body 15 up to the site where the affected area 17 is present, as in the case of the first embodiment. Then, the microwave probe 1 is heated. In this case, since the first sub-lumen 4a and the second sub-lumen 4b are filled with the silicone oil 25, the microwave radiated from the antenna body 7 around the entire circumference radiates toward the entire circumference. , The affected part 17 existing all around can be treated with heat.

On the other hand, as shown in FIG.
If there is, use the switch 22 to press the roller pump 23.
Air is introduced into the first sub-lumen 4a and the second sub-lumen 4b by making the liquid feeding direction of the reverse direction to the above-mentioned case. Next, as in the case of the first embodiment, the microwave probe 1 is inserted up to the site where the diseased part 17 is present, and the first sub-lumen 4a and the second sub-lumen 4b are inserted into the site where the diseased part 17 is present.
Side, that is, the peripheral surface side where microwave is radiated
Turn to 17. Then, only the affected part 17 is intensively heated. Since air is contained in the first sub-lumen 4a and the second sub-lumen 4b, the microwave radiated from the antenna body 7 is blocked for the reason described above.

Therefore, according to the above-mentioned configuration, depending on whether or not the silicone oil 25 is injected into the first sub-lumen 4a and the second sub-lumen 4b, the whole circumference region heating and the one-way region heating of the microwave probe 1 are heated. Microwave probe 1
The types of can be reduced. Therefore, it is economical for the purchasing user. Further, the configuration is almost the same as that of the first embodiment, and the same operational effect can be obtained in this respect.

7 to 9 show a third embodiment of the present invention. This embodiment is similar to the first embodiment described above in that
A microwave probe 1 having one main lumen 3 and one sub-lumen 4, and the microwave probe 1 further includes a tip cap 5, a microwave radiating antenna body 7, a sensor hole 8, a temperature sensor 9, and a filling member. Each agent 10 is provided in the same way as in the first embodiment.
Further, the oscillator 12, the thermometer 13, and the control unit 14 connected to the microwave probe 1 are also provided in the same manner as in the first embodiment.

Further, in this embodiment, as shown in FIGS. 8 and 9, the tip portion of the probe main body 2 (microwave radiation portion).
At, a liquid feeding hole 41 communicating with the sub-lumen 4 and opening to the outside is formed. A flexible balloon 42 is fixed to the outer circumference of the tip portion. At that time, the sensor hole 8 is provided on the distal side of the balloon 42, and the liquid feeding hole 41 is provided inside the balloon 42. The balloon 42 is the ninth
As shown in the figure, while enclosing the tip of the probe main body 2 consisting of a two-hole tube, the sub-lumen 4 side is made a free portion, and the opposite side portion of the sub-lumen 4 is attached to the tip end wall surface of the probe main body 2 with an adhesive or the like. It is fixed.

Further, as shown in FIG. 7, the sub-lumen 4 is connected to the liquid feed tube 43 at the end of the microwave probe 1, and the liquid feed tube 43 is connected to the first syringe 45 and the first syringe 45 via the three-way switching valve 44. Two syringes 46 are connected. The first syringe 45 is filled with air, and the second syringe 46 is filled with an insulating (dielectric) liquid such as silicone oil.

And when using the thing of this Example, it is performed as follows.

First, when the affected part 17 generated in the lumen 16 of the living body 15 extends over the entire circumference of the lumen 16, the second syringe 46
While injecting silicone oil into the sub-lumen 4,
Air is evacuated by the first syringe 45. Therefore, the sub-lumen 4 is filled with silicon oil as a dielectric, and the microwave radiated from the antenna body 7 in all directions is radiated in all directions without being blocked. Therefore, if the microwave probe 1 is inserted into the lumen 16 and radiates microwaves, the affected area 17 spreading over the entire circumference of the lumen 16 can be uniformly heated as a whole. .

In addition, as shown in FIG.
Is unevenly distributed, the first sub-lumen 4
Inject air with the syringe 45. Then, while inserting the microwave probe 1 into the lumen 16,
17 on the opposite side of the sub-lumen 4 (on the side where the balloon 42 is fixed)
Turn to. Then, if the microwave is radiated, only the affected part 17 unevenly distributed in a part of the lumen 16 is irradiated with the microwave to heat the normal living tissue as little as possible.

Further, when the inner diameter of the lumen 16 is larger than the outer diameter of the microwave probe 1 (in particular, the outer diameter of the tip antenna portion), after inserting the microwave probe 1 into the lumen 16, the balloon fixing portion side The first syringe
45 further injects air into the sublumen 4. Then, as shown by the broken lines in FIGS. 8 and 9, the balloon 42 is shown.
Expands to one side, that is, to one side where the affected area 17 does not exist. When it becomes difficult to pull out even if the microwave probe 1 is pulled out, the air injection is stopped and the microwave is irradiated to affect the affected area.
Heat 17

Instead of inflating the balloon 42 with air in the lumen 16, silicon oil as a dielectric may be supplied to inflate the balloon 42. In this case, the electric field of the microwave in the lumen 16 is biased, and the heating distribution in the radial direction can be changed.

Thus, according to this configuration, by selecting air, an insulating liquid, or the like into the sub-lumen 4, radiation directivity around the microwave probe 1 can be obtained, and radiation in the entire circumferential direction can be obtained. Can be switched. Therefore, it can be used in various conditions 17 in the best condition.

By providing the balloon 42, not only the thin lumen 16 but also the thick lumen 16 can be applied.

Moreover, because the balloon 42 is flexible, the microwave probe 1 can also be used with flexible and curved lumen 16.

Although the balloon 42 is formed in a tubular shape and is fixed at one place, it is divided into a plurality of pieces in the circumferential direction as shown in FIGS.
It is one balloon part 42a, 42b, 42c. For this reason,
Four fixing portions 48 are provided along the axial direction of the probe body 2. In addition, the probe body 2 has injection holes 49a, 4a that individually communicate with the three balloon portions 42a, 42b, 42c.
9b and 49c are formed. Then, these injection holes 49a,
49b and 49c communicate with the main lumen 3. And
A low-loss dielectric can be injected from the main lumen 3 into the balloon portions 42a, 42b, 42c through the injection holes 49a, 49b, 49c. As a result, the balloon portions 42a at different positions,
42b and 42c can be inflated. The balloons 42a, 42b, 42c may be selectively inflated by individually injecting a dielectric material into each of the balloons 42a, 42b, 42c.

Further, according to this configuration, since the balloon portions 42a, 42b, 42c do not have to be tube-shaped, they can be easily made and the manufacturing cost can be reduced.

12 to 14 show a fourth embodiment of the present invention. As shown in FIG. 13 and FIG. 14, the probe main body 2 of the microwave probe 1 is composed of a one-hole tube, and inside the hole 51, the tip portion is, for example, a folded dipole type microradiation antenna body 7 which is coaxial. The cable 6 is inserted. The entire coaxial cable 6 including the antenna body 7 is covered with a thin film 52 made of an insulating material. In addition, the dipole antenna body 7 and the hole
A fan-shaped spacer (made of the same material or having the same dielectric constant as that of the one-hole tube) 54 is inserted in a part of the peripheral space 53 between the inner peripheral surface of 51. A fixed shaft 55 is connected to the end of the spacer 54, and the fixed shaft 55 is connected to a drive device 56 that rotationally drives the fixed end of the microwave probe 1. Silicone oil or the like may be applied to the spacer 54 so that it can easily slip between the outer circumference of the antenna body 7 and the inner circumference of the hole 51. The drive unit 56 is connected to the input unit 58 via the drive circuit 57.
Connected to the input terminal 58 and the signal input from the input section 58
54 is rotatable in the circumferential direction. Further, the oscillator 12, the thermometer 13, and the controller 14 are connected to the microwave probe 1 as described above.

Further, in this embodiment, an ultrasonic transducer 61 is provided on the outer surface portion of the microwave probe 1 which is located on the distal side of the microwave radiating portion formed at the tip of the microwave probe 1. The ultrasonic transducer 61 is electrically connected to an external observation device 63 through a signal line 62 provided in the microwave probe 1, and the observation device 63 enables observation of a tomographic image of the lumen 16.

Further, the temperature sensor 9 is fixed to the outer surface of the microwave probe 1 through a sensor hole 64 that is open from the space 53. The sensor hole 64 is sealed with a filler 65. The temperature sensor 9 extends from the end of the microwave probe 1 and is connected to the thermometer 13. Further, as described above, the oscillator 12 and the control unit 14 are provided.

Next, the operation of the microwave probe 1 will be described. First, the microwave probe 1 is inserted into the lumen 16 of the living body 15. Then, the observation device 63 is driven to look at the tomographic image of the lumen 16 and the affected part 17 is examined. The input unit 58 is operated and the drive unit 56 is moved to direct the spacer 54 toward the affected part 17.
The space 53 without the spacer 54 has, for example, air, and the microwave transmission efficiency is poor. Further, the spacer 54 efficiently transmits microwaves and causes the microwaves to be radiated in a certain direction of the spacers 54. Therefore, microwaves are efficiently radiated toward the affected area 17, and the affected area 17 can be intensively heated.

Thus, according to this embodiment, the affected part 17 can be diagnosed and treated with one microwave probe 1, and the fatigue of the doctor and the patient can be reduced. In addition, since the microwave probe 1 is composed of a one-hole tube, it can be made extremely thin,
Applicable to thin lumen 16. Further, since the spacer 54 may be made of the same material as the probe body 2, the microwave probe 1 can be made particularly flexible.

15 to 16 show a fifth embodiment of the present invention. In the microwave probe 1 of this embodiment, a coaxial cable 6 is inserted into the probe main body 2 along the center thereof, and a microwave radiation antenna body 7 is formed by an inner conductor and an outer conductor at the tip of the coaxial cable 6. ing. Inside the vicinity of the tip of the probe body 2 in which the microwave radiating antenna body 7 is incorporated, a cylindrical cavity portion 66 formed concentrically around the antenna body 7 is provided. A plurality of silicon (dielectric) members 67 that are long in the axial direction of the probe body 2 are provided in the cavity 66 so as to be movable back and forth in the axial direction of the probe body 2. As shown in FIG. 16, the plurality of silicon members 67 are densely arranged in the cavity 66 along the circumferential direction and are slidably installed in the axial direction of the probe body 2. Each silicon member 67 has an operation wire 68 connected to its end, and each operation wire 68 is guided to the end of the probe body 2 through an insertion channel 69 in the probe body 2. Then, for example, an advancing / retreating drive device 70 such as a rack and a pinion is operated to advance / retreat. Each reciprocating drive device
Each 70 is driven and operated by a drive circuit 71. The drive circuit 71 is controlled by the control circuit 72. Control circuit
An input section 73 for giving an operation command to the 72 is connected to the 72.

On the other hand, a plurality of ultrasonic transducers 75 are installed on the peripheral wall of the tip of the probe body 2 along the circumferential direction. The ultrasonic transducers 75 are arranged with their tips aligned with the tips of the respective silicon members 67 when retracted. Ultrasonic transducer
75 is connected to the ultrasonic observation device 77 through a signal line 76. As shown in FIG. 15, the ultrasonic observation device 77 includes a multiplexer 78, an input / output switch circuit 79, a transmission / reception circuit 80, an A /
A D-comparator 81, a digital scan converter (DSC) 82, and a monitor 83, and the other circuits except the monitor 83 are controlled by a control circuit 84.

When the microwave probe 1 is used, it is inserted into the lumen 16 and the ultrasonic observation device 77 is operated to observe a tomographic image near the affected area 17 through the ultrasonic transducer 75 for diagnosis. Then, the depth of the affected part 17 in the entire circumference of the lumen 16 is judged, and the advancing / retreating drive device 70 of the silicon member 67 corresponding to the part of the range to be heated to the deep part is operated to move forward. Further, with respect to the silicon member 67 corresponding to a portion in a range where heating is not desired to a deep portion, the advancing / retreating drive device 70 of the silicon member 67 is not operated and the silicon member 67 is left retracted and remains as an air layer. The air layer has a low dielectric constant and blocks microwaves. In this way, it is possible to selectively heat the ultrasonic tomographic image around the antenna body 7 in accordance with the depth of the ultrasonic tomographic image.

Although the silicon members 67 having the same width and the same dielectric constant are used in this embodiment, they may be variously changed so that the heating state can be variously changed.

17 to 18 show a sixth embodiment of the present invention. In the microwave probe 1 of this embodiment, a coaxial cable 6 is inserted into the probe main body 2 along the center thereof, and a microwave radiation antenna body 7 is formed by an inner conductor and an outer conductor at the tip of the coaxial cable 6. ing. In the vicinity of the tip of the probe main body 2 in which the microwave radiation antenna body 7 is incorporated, the above-mentioned fifth
Similar to the embodiment described above, a cylindrical cavity portion 66 formed concentrically around the antenna body 7 is provided. A cylindrical silicon (dielectric) member 90 is rotatably provided in the cavity 66. That is, a means for selecting the position of a part of the hollow portion 66 to position the dielectric is configured.
The cylindrical silicon member 90 is cut off obliquely to form a cavity 66.
Inside, the length is different at each position along the circumferential direction. That is, in the position state shown in FIG. 17, the length of the lower portion extends over the entire length of the cavity 66, the upper portion is the shortest, and therefore the air layer is the longest. Further, the end of the silicon (dielectric) member 90 is connected to the ultrasonic motor 91 provided inside the ultrasonic transducer for ultrasonic observation 75 described above and is driven to rotate. The ultrasonic motor 91 is an ultrasonic motor drive circuit of an external device.
It is adapted to be rotated by the 92 and the ultrasonic motor position detection circuit 93. In addition, in addition, the ultrasonic observation device 77 and the like are configured in the same manner as in the above-described embodiment.

When the microwave probe 1 is used, it is inserted into the lumen 16 and the ultrasonic observation device 77 is operated to observe a tomographic image near the affected area 17 through the ultrasonic transducer 75 for diagnosis. Then, when the size of the range that is not desired to be heated in the lumen 16 is determined, for example, when there is a part of the vas deferens in the treatment of the prostate, while observing an ultrasonic tomographic image, the The ultrasonic motor 91 is driven by the ultrasonic motor drive circuit 92 and the ultrasonic motor position detection circuit 93 so that the layers are positioned. Since the air layer is located on the side of the seminal vesicle, when the microwave is radiated from the antenna body 7, the microwave traveling toward the side of the seminal vesicle is blocked by the layer of air and does not heat the seminal vesicle.

19 to 20 show a seventh embodiment of the present invention. In the microwave probe 1 of this embodiment, a coaxial cable 6 is inserted into the probe main body 2 along the center thereof, and a microwave radiation antenna body 7 is formed by an inner conductor and an outer conductor at the tip of the coaxial cable 6. ing. Further, inside the vicinity of the tip of the probe body 2 in which the microwave radiation antenna body 7 is incorporated, a plurality of conduits 95 are arranged around the antenna body 7. Each pipe line 95 is composed of two pipe line portions 95a and 95b which communicate with each other at the tip. That is, each conduit 95 is arranged around the antenna body 7, and each conduit 95 is arranged so as to surround the antenna body 7 by these. In addition, each of the conduits 95 is arranged with one conduit portion 95a inside and the other conduit portion 95b outside, and is arranged radially in relation to the center of the probe main body 2. Furthermore, each pipeline 95 is connected to an external device. One of the conduit portions 95a is connected to an air feeding pump 97 and a water feeding pump 98 via a switching electromagnetic valve 96. The air pump 97 pumps air, and the water pump 98 is the tank 99.
For example, a physiological saline solution stored inside is pumped up and sent out. The other pipe line portion 95b is connected to the tank 99 via the switching electromagnetic valve 100, and the physiological saline supplied to each pipe line 95 is returned to the tank 99. Switching solenoid valve
96 and the switching solenoid valve 100 are adapted to be operated by the control circuit 101. 102 is an input unit.

In addition, in addition, the ultrasonic observation device 77 and the like are configured in the same manner as in the above-described embodiment.

When the microwave probe 1 is used, it is inserted into the lumen 16 and the ultrasonic observation device 77 is operated to observe a tomographic image near the affected area 17 through the ultrasonic transducer 75 for diagnosis. Then, if there is a portion of the lumen 16 that is not desired to be heated, air is sent to the duct 95 located on that side, and the duct 95 located corresponding to the portion side to which deep temperature is desired to be heated. Is supplied with saline to fill the inside. As a result, microwaves are blocked on the side of the duct 95 where air is present, and microwaves are passed on the side of the duct 95 filled with physiological saline. It is possible to separately heat the site that is not desired to be heated and the site that is desired to be heated deeply.

It should be noted that the present invention is not limited to the above-mentioned embodiment, and various modifications can be considered within the scope of the invention.

[Effects of the Invention] As described above, according to the present invention, since the microwave blocking space is partially formed in the antenna part and the outside thereof in the antenna part, it becomes difficult to radiate the microwave in a certain direction of the space, Directive heating is possible only in the direction without space. Further, since a member that hinders the flexibility of the probe is not provided outside the antenna body, the flexibility of the antenna part is increased, and the probe can be easily inserted into a bent lumen.

[Brief description of drawings]

1 to 3 show a first embodiment of the present invention, FIG. 1 is an explanatory view of the overall schematic configuration, and FIG. 2 is a vertical cross-sectional view of the vicinity of the tip of a microwave probe, FIG. 3 is a sectional view taken along the line AA in FIG. FIGS. 4 to 6 show a second embodiment of the present invention, FIG. 4 is an explanatory view of the overall schematic configuration, and FIG. 5 is a vertical sectional view near the tip of the microwave probe. FIG. 6 is a sectional view taken along the line BB in FIG. 7 to 9 show a third embodiment of the present invention, and FIG. 7 is an explanatory view of the overall schematic structure, and FIG.
The figure shows a vertical cross-sectional view near the tip of the microwave probe, No. 9
The drawing is a sectional view taken along the line CC in FIG. FIG. 10 and FIG. 11 are vertical sectional views of the tip of the microwave probe showing a modification of the third embodiment. Figures 12 through 14
FIG. 12 shows a fourth embodiment of the present invention, FIG. 12 is an explanatory view of the overall schematic configuration, FIG. 13 is a vertical cross-sectional view near the tip of a microwave probe, and FIG. It is sectional drawing which follows the DD line in a figure. 15 to 16 show a fifth embodiment of the present invention, and FIG. 15 is an explanatory view of the overall schematic structure,
FIG. 16 is a sectional view taken along the line EE in FIG. 17 to 18 show a sixth embodiment of the present invention, FIG. 17 is an explanatory view of the overall schematic structure, and FIG. 18 is F- in FIG.
It is sectional drawing which follows the F line. 19 to 20 show a seventh embodiment of the present invention, FIG. 19 is an explanatory view of the overall schematic configuration, and FIG. 20 is a sectional view taken along the line GG in FIG. Is. 1 ... Microwave probe, 2 ... Probe body, 3 ...
… Main lumen, 4 …… Sublumen, 6 …… Coaxial cable, 7 …… Antenna, 66 …… Cavity, 95 …… Pipeline.

Claims (1)

[Claims] 1. A flexible and long probe main body in which a portion forming an antenna portion is formed of at least a dielectric material, a microwave antenna body installed in the dielectric body of the antenna portion in the probe main body, and A thermotherapy probe comprising a microwave blocking space provided in a part of the dielectric body between a microwave antenna body and an outer surface of the antenna section.