JPS631065B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an endoscopic microwave device that heats and treats an affected area within a body cavity.

The principle of treating an affected area, such as a malignant tumor that has arisen within a body cavity, by heating it to kill the cells is already known. However, it can be said that there is still no effective therapeutic means based on this principle. For example, the following methods are known as means for heating an affected area within a body cavity. First, using the air and water supply ports and suction ports provided at the tip of the endoscope, blow hot air or warm water from the air and water ports to the affected area within the body cavity, and then blow the warm air or water from the suction port. There is a method of collecting hot water and performing heat treatment. However, this method can be expected to be effective to some extent when the affected area is exposed to the surface of the body, but when the affected area is below the surface, the temperature of the body does not rise due to blood circulation in normal tissue on the surface side. Because they control themselves from the side,
Heat does not reach below the surface and is ineffective.

In addition, using a conventional high-frequency scalpel or laser scalpel for endoscopy has been considered as another method, but these instruments are originally used for surgically removing the affected area, and they may accidentally remove normal tissue. If it comes into contact with tissue, it is not practical because there is a risk that even the normal tissue will be killed. Moreover, even if the output could be reduced, it would not be effective against deep affected areas for the same reason as mentioned above.

Therefore, in recent years, various studies have been conducted on heating treatment of affected areas using microwaves. For example, it has been considered that a microwave probe is protruded from a channel of an endoscope, and the affected area is heated and treated with microwaves emitted from the probe. According to such means, since microwaves have the property of passing through living bodies, it is possible to certainly heat-treat the affected area below the surface to some extent. However, the penetration depth of microwaves is usually limited to about 1 cm for muscle and about 10 cm for fat tissue, so there is a problem that it is not possible to reliably heat treat affected areas that are deeper than this. Furthermore, when microwaves are emitted from the probe, the microwaves are diffused, resulting in the inconvenience of heating normal tissues other than the affected area.

This invention was made based on the above circumstances, and its purpose is to
It is an object of the present invention to provide a microwave device for an endoscope, which can reliably heat-treat even deep diseased parts, and can hardly heat normal tissues during the treatment.

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. 1 in Figure 1 is an endoscope,
This endoscope main body 2 has an insertion section 3 inserted into a biological cavity.
and an operating section 4 on the hand side. The insertion section 3 is formed by connecting a distal end component 7 to the distal end of a flexible tube section 5 via a bending section 6, and the bending section 6 is bent by rotating the angle knob 8 of the operating section 4. , the orientation of the tip component 7 can be selectively operated. Further, a flexible light guide cable 9 is connected to the operation section 4, and a connector 12 that can be attached to the socket section 11 of the illumination light source device 10 is fixedly attached to the end of the light guide cable 9. There is.
A light guide 13 made of, for example, an optical fiber bundle is inserted across the insertion section 3, the operation section 4, and the light guide cable 9 of the endoscope body 2, and the light guide 13 is used for illumination. Illumination light from the light source device 10 is guided to the tip component 7, and the illumination light is emitted from an illumination window 14 formed in the tip component 7. Also,
An image guide 15 made of, for example, an optical fiber bundle is inserted inside each of the insertion section 3 and the operation section 4 of the endoscope body 2, and an observation window 16 and an objective lens 17 formed in the distal end component 7 are inserted. The optical image obtained through the oscilloscope is guided to the eyepiece section 18 of the operation section 4, so that the field of view inside the living body cavity can be observed. The illumination window 14 and the observation window 16 are arranged side by side on the distal end surface of the main body 19 of the distal end component 7, and constitute a so-called direct view type endoscope 1.

Further, a through hole 20 is bored in the main body 19 of the distal end component 7, and a flexible tube 22 constituting a forceps channel is connected to this through hole 20 at one end via a short metal tube 21, and the insertion portion 3 is interpolated.
The other end of the flexible tube 22 communicates with a forceps port 23 formed in the operating section 4. A flexible tubular body, such as a coil sheath 24, is inserted into and removed from the flexible tube 22. A piercing needle 25 is connected to the tip of the coil sheath 24, and a stopper 26 having a large diameter portion 26a larger than the forceps port 23 is attached to the other end. Note that the coil sheath 24 has a stopper 26 connected to the forceps opening 2.
When the needle is inserted until it hits point 3, the above-mentioned piercing needle 2
5 has a length sufficient to protrude from the through hole 20. The piercing needle 25 has an obliquely notched tip 27 to form a sharp needle tip 27, and this tip is closed with a protective film 28 made of a material with a low dielectric constant such as vinyl chloride. The structure is designed to prevent body fluids from entering.

A transmission line 29 is inserted into and removably inserted into the coil sheath 24 and the piercing needle 25. An antenna 30 constituting a heater is attached to the tip of the transmission line 29, and a plug 31 is attached to the rear end protruding from the coil sheath 24.
is connected to a socket 33 provided in a power supply device 32 for microwave oscillation. Although not shown, the power supply device 32 includes a power supply section, an oscillation section that sends a microwave current to the transmission line 29, and a cooling section that cools the oscillation section.

The transmission line 29 is constituted by a so-called coaxial cable, which, as shown in FIG. 2, consists of a core wire 34, a dielectric material 35 surrounding it, and a shield material 36 covering the outside thereof.

Next, the operation of the above configuration will be explained. First, the coil sheath 24 is inserted into the flexible tube 22 from the forceps port 23 of the endoscope body 2, and
The transmission line 29 is inserted into the coil sheath 24 and the antenna 30 is positioned at the tip of the piercing needle 25 as shown in FIG.
After introducing the object into the body cavity, the field of view inside the body cavity through the observation window 16 is observed through the eyepiece 18. and,
When an affected area such as cancer or tumor is found on the inner wall of the body cavity, the coil sheath 24 is pushed in, and the piercing needle 25 attached to the tip thereof is made to protrude from the through hole 20 and pierce the affected area. Next, the power supply device 32 for microwave oscillation is activated to send a microwave current to the transmission line 29, thereby causing the antenna 30 attached to the tip of the transmission line 29 to oscillate microwaves. Then, the microwaves pass through the protective film 28 and are emitted from the distal end surface of the piercing needle 25, so that the affected area pierced by the piercing needle 25 is heated and treated.

During such heat treatment, since the tip of the piercing needle 25 is pierced into the affected area, deep areas can be effectively heat treated. Moreover, antenna 30
Since the microwaves oscillated from the piercing needle 25 are hardly diffused to the surrounding area due to the piercing needle 25 being stuck into the affected area, normal tissues other than the affected area will not be heated. Furthermore, once the affected area is detected while looking through the eyepiece 18, heating treatment can be performed in succession to the detection of the affected area by simply protruding the piercing needle 25 and activating the power supply 32. Surgery can be performed quickly.

In addition, if an affected area under the surface of the inner wall of the body cavity is discovered due to tissue changes on the surface, the penetration needle 25 can be deeply inserted into the affected area and microwaves can be oscillated. Even if the affected area is in a location where microwaves cannot pass through it, the affected area can be reliably heated and treated.

Furthermore, in order to pierce the body cavity wall with the piercing needle 25 and oscillate microwaves, the piercing needle 25 is inserted into the body cavity wall during heat treatment.
There is no possibility that the antenna 30 built into the penetrating needle 5 will shift and move along with the piercing needle 25. Moreover,
Since the transmission line 29 is detachable from the coil sheath 24, if the piercing needle 25 becomes dull due to long-term use, only the piercing needle 25 can be replaced, and the expensive transmission line 29 and antenna 30 can be replaced. can be used repeatedly.

If, for example, ultrasonic waves are used instead of the energy guide as a means of detecting the affected area, the affected area below the surface can be discovered and heat treated without relying on surface changes in the inner wall of the body cavity.

Furthermore, FIG. 3 shows another embodiment of the present invention, in which the transmission line 29 is divided into two, and a connecting pipe 38 having a socket 37 is provided at the rear end of one transmission line 29a. and the other transmission line 2
A plug 40 having a connecting pin 29 is provided at the tip of the transmission line 9b, and these transmission lines 29a and 29b are connected to the socket 3.
7 and a pin 39 so as to be removably connected.

According to such a configuration, one transmission line 29a
After inserting the coil sheath 24 into the coil sheath 24, it is possible to connect it to the other transmission line 29b connected to the power supply device 32. Furthermore, if the transmission line 29b is connected to a detector (not shown) that detects the affected area by capturing microwaves emitted from the body cavity wall, the transmission line 29a having the antenna 30 can be easily connected to the detector. It can be switched and connected and used as a means of detecting the affected area.

As described above, the present invention connects a piercing needle with a sharp tip to the end of a flexible tubular body that can be attached and detached from the channel of an endoscope,
Since it has a built-in heater that oscillates microwaves, it is possible to oscillate microwaves by piercing the piercing needle into the wall of the body cavity. Therefore, not only can deep-lying affected areas that cannot be penetrated by microwaves from the surface be successfully heated, but the microwaves are unlikely to diffuse and heat normal tissues other than the affected areas. . Furthermore, since the tubular body is detachable from the channel of the endoscope, the heater can be easily inspected or repaired or replaced by removing the tubular body from the channel.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of the entire device showing one embodiment of the invention, FIG. 2 is a sectional view of the main parts, and FIG. 3 is a sectional view of a transmission line showing another embodiment of the invention. 24... Coil sheath (flexible tube body), 25
...Piercing needle, 30...Antenna (heater).

Claims (1)

[Claims] 1. A piercing needle with a sharp tip is connected to the end of a flexible tubular body that can be attached to and detached from the channel of an endoscope, and microwaves are emitted to the piercing needle. An endoscope microwave device characterized by having a built-in heater. 2. The endoscopic microwave device according to claim 1, wherein the heater is detachably attached to the piercing needle.