JPS6241725B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an equilibrated impulse wave generator for lithotripsy used for medical lithotripsy.

There are two methods for crushing stones within a living body: a method in which a crushing instrument is introduced directly to the site and a method in which stones are crushed indirectly from outside the body. Direct methods include forceps, explosive crushers, and spark discharge devices.
On the other hand, as an indirect method, there is a method in which a balanced wave is generated by electric discharge outside the body, and the wave is focused on a stone site inside the body using a reflective focusing mirror having a spheroidal structure to crush the stone.

The latter method has the advantage of being able to fracture stones in areas where it is impossible to insert instruments with the former direct method, but there is a risk of electric shock as it generates an equilibrated wave due to high voltage discharge. There are drawbacks such as the inability to record electrocardiograms and pulse pulses during treatment due to the effects of

Therefore, the present invention was made as a result of focusing on the equilibrium waves generated by the explosion of explosives in order to eliminate the drawbacks of the above-mentioned indirect method.

We have already provided an equilibrated wave generator that emits an equilibrated wave generated from the tip of a metal tube into a reflecting and focusing mirror.
Subsequently, as a result of intensive study on this impact wave generator, it was recognized that the stone crushing device developed so far could be an excellent impact wave generator.

This crushing device forms a blasting part for crushing urinary tract stones by installing a container containing explosives and an igniter inside the tip of a thin tube that can be inserted into the organ where urinary calculi exist. A urinary stone crushing device is characterized in that the container forming the blasting part is made of a fragile material so that it is crushed during blasting, and the present invention is directed to the urinary stone crushing device. This was developed into an equilibrated wave generator for reflective focusing mirrors.

That is, the acoustic wave generator of the present invention has the tip of the thin tube,
A container containing explosives and an igniter is provided inside the container to form an explosive part that is guided into the reflecting and focusing mirror to generate an equilibrated wave, and the container forming the explosive part is made of a fragile material. An object of the present invention is to provide an equilibrated wave generator characterized in that it is broken when an equilibrated wave is generated.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Examples of the balanced wave generator of the present invention will be described below with reference to the drawings.

As shown in FIG. 1, the equilibrated wave generator of the present invention focuses an equilibrated wave using a reflective focusing mirror 1, and irradiates it from outside the body to a stone 2 inside the body, thereby generating an equilibrated wave in a stone crushing device that performs crushing treatment. This relates to the wave generating tool 3. In addition, what is indicated by 4 in FIG. 1 is an X-ray generator.

The embodiment shown in FIG. 2 shows the basic structure of the balanced wave generator 3 of the present invention, in which 5 is an explosive part provided at the tip of a thin tube 6 to be inserted into a reflection focusing mirror. , a cylindrical container having a plug 7, and an igniter 10 to which explosives 8 and pyrotechnic charge 9 are attached is housed inside. Reference numeral 11 denotes a leg wire for electrically igniting the igniter, which passes through the center of the plug and is fixed, passes through the inside of the thin tube 6, and is led out from the rear end of the thin tube.

The explosion part 5 is usually composed of a cylindrical container, but in the case of the present invention, this container is made of a brittle material that does not act as a resistor during the explosion 8, such as synthetic resin or natural resin. . Generally, materials such as acrylic resin, polyethylene resin, and vinyl chloride resin are used, and the thickness of the material is usually
0.6 mm or less is preferably used. In the explosion section 5, it is preferable to leave the tip of the container open and cover the exposed surface of the explosive with a waterproof material different from that of the container.

As the explosives 8 loaded into the explosion part 5, a primer that can be easily detonated even in a small amount is preferably applied. Also, an igniter 10 for detonating explosives 8
Depending on the type of explosives 8 used, the structure may be such that the explosives are not provided and the explosives are detonated by direct electric ignition (for example, heating of platinum wire, etc.), laser ignition, fuse ignition, or detonating fuse ignition.

In the embodiment shown in FIG. 2, the thin tube 6 and the explosion part 5 provided at its tip have the same diameter and are connected at the plug 7, but this connection method is arbitrary, and for example The connection method shown in the embodiment of FIG.
Alternatively, the reverse connection method can also be adopted.

In the embodiment shown in FIG. 3, the container constituting the explosion section 5 has a diameter smaller than that of the thin tube 6, and a portion of the container is inserted and fixed inside the thin tube 6.

Further, since the thin tube 6 is used to set the explosive part 5 inside the reflecting mirror, it is preferably made of hard resin or metal, and the explosive part 5 can be set accurately and easily inside the reflecting mirror. In order to do this, it is preferable to attach a ring or a convex object to a part of the thin tube.

The acoustic wave generator of the present invention shown in the above embodiments is resistant to explosions of explosives because the container constituting the explosion part provided at the tip of the thin tube is made of a fragile material. It does not act as a resistor and is completely destroyed in the event of an explosion.Therefore, the equilibrium wave generated by the explosion is not affected by the container, and as shown in the schematic diagram in Figure 4, the equilibrium wave generator generates a spherical shape. propagate to. In FIG. 4, arrows indicate the direction of propagation of the balanced waves.

Therefore, by detonating the explosion section of the present invention at a focal point within a reflecting mirror with a reflecting surface having a spheroidal structure, the generated equilibrium wave is efficiently reflected and focused at the other focal point, so the focal point is The pressure will be extremely high.

The explosive part (explosives Set 5 mg of lead azide, acrylic resin container, container outer diameter 3 mm, container inner diameter 2.4 mm), place a kidney stone with a size of 0.9 cm x 1 cm x 1.5 cm at the other focal point, and place the electrostatic wave of the present invention underwater. It was discovered that by energizing the generator and causing it to explode, it was possible to crush kidney stones into sand-like particles large enough to be expelled naturally.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing a cross section of a main part of a stone crushing device in an embodiment of the present invention, and FIGS. 2 and 3 are explanatory diagrams of an embodiment of an equalizer wave generator of the present invention. 2 shows an example in which the explosion part 5 and the capillary tube 6 have the same diameter, and FIG. 3 shows an example in which the diameter of the explosion part 5 is smaller than that of the capillary tube 6. FIG. 4 is a schematic diagram showing the propagation direction of an equalizing wave generated when the explosion section 5 explodes. DESCRIPTION OF SYMBOLS 1... Reflection focusing mirror, 2... Stone, 3... Equal wave generator, 4... X-ray generator, 5... Explosive part, 6... Thin tube,
7... Blocking plug, 8... Explosives, 9... Igniting powder, 10... Igniter, 11... Leg line.

Claims (1)

[Claims] 1. At the tip of the thin tube, a container containing explosives and an igniter is provided inside to form an explosive part that generates an equilibrated wave by guiding it into an equilibrated wave reflecting and focusing mirror, and also to form an explosive part. An equilibrated wave generator for a stone crusher, characterized in that a container is made of a brittle material and is destroyed when an equilibrated wave is generated.