JPS6036291B2 - Urinary stone crushing device - Google Patents

Description

[Detailed description of the invention] The present invention relates to a urinary stone crushing device.

BACKGROUND ART Devices have been known for crushing abalone concretion by pressurizing a small amount of an explosive, such as lead azide or DDNP, into a metal tube and detonating it using an igniter.

In such a crushing device, a large amount of gas is generated at the time of explosion, and this explosive gas further expands due to the heat of the explosion, which may cause injury to living organisms. In other words, if the combustion gas generated when the igniter burns, the air around the igniter, and the crushing explosive are lead azide, it will produce nitrogen gas, and if it is an organic substance such as DDNP, it will produce carbon monoxide and carbon dioxide. , and explosion product gases such as nitrogen or nitrogen oxides, which expand due to high temperatures. Since the enamel is quite large and durable compared to the volume of the expanded product gas, injuries caused by such gas expansion are rare, but of course it is desirable to reduce the amount of explosive gas as much as possible.
On the other hand, in a narrow place such as the ureter, the damage caused by explosive gas is thought to be extremely large. In other words, the inner diameter of the ureter is narrow from 2 to 3 ribs. When a metal tube is inserted to crush a stone in such a location, there is almost no space between the metal tube and the ureter, so there is no way for the explosive gas to escape.
The ureter becomes greatly distended. Therefore, if the amount of explosive gas is large, it can damage the urinary tract, or in severe cases, cause it to rupture, resulting in dangerous consequences for the human body. It also increases pressure in the ureters, causing urine to back up into the kidneys, damaging the kidneys and causing bacterial infections. In order to prevent such a phenomenon, the ideal crushing device is one that does not generate gas.

An effective way to do this is to use a wire-based detonation method in which a resistance wire is heated by electricity without using an ignition powder to eliminate the gas generation caused by the ignition powder, or to use a laser to directly detonate the crushing explosion. . However, since most of the gas generated during an explosion is due to fracturing, it is most effective to suppress this. As a result of detailed study on this point, the present inventors found that a metal compound of acetylene was suitable as a crushing explosion with a small amount of explosion gas.

When the metal compound of acetylene explodes, it turns into carbon and metal and does not emit any gas at all.Moreover, it is highly stable and safe, and has a large crushing effect, making it ideal as an explosion for crushing urinary stones. By using such explosives, stones in the bladder as well as stones in narrow tubes such as the ureter can be crushed without side effects.The metal compounds of acetylene include heavy metal compounds of acetylene, especially acetylene silver and acetylene steel. is given as an example.

Next, the stone crushing device of the present invention will be explained with reference to the drawings.

In Figure 'A turtle is a tube that can be inserted into an organ that causes urinary stones to be present, and is usually made of metal such as stainless steel.

One end of the pipe body is closed and a pressure layer 2 of a heavy metal compound of acetylene is provided there. 3 is connected to a power source (not shown) through a resistance wire through a leg wire.

6 is a tomb member.

When the crushing device configured in this manner is inserted into a living body, the opening of the tube body is placed adjacent to the calculus, and electricity is applied, the resistance wire generates heat, which causes the pressure layer to explode and crush the silk stone. . Figure 2 shows an example in which a laser is used instead of the electric detonation means in the 1st military map - In the figure, elements with the same numbers as in the 1st official map are the same as sound B materials in the 1st military map. It is.

Reference numeral 6 denotes an optical fiber, one end of which is adjacent to the pressure layer bonito, and the other end connected to a laser generator (not shown).

When a laser beam is emitted from the laser generator, it passes through the optical fiber 6 and irradiates the compression layer 2, thus igniting the compression layer 2. Next, the present invention will be explained in more detail with reference to Examples. Example 1 5-9 acetylene silver with inner diameter of 2 ribs, outer diameter of 3 willows, length of 30
It was compressed in a stainless steel pipe on the side, detonated underwater by a line explosion as shown in the diagram, and was photographed with a high-speed camera to measure the size of the gas bulb at the time of explosion. The volume was 8% compared to the gas bulb at the time of the explosion.

Example 2 Two pieces of acetylene silver were press-fitted into a 20-length stainless steel pipe with an inner diameter of 2 and an outer diameter of 3.
It was inserted into a polyethylene pipe with a thickness of 1 willow and detonated using a line explosion as shown in the nose diagram, but the pipe was not damaged at all.

Example 3 A crushing device shown in Fig. 2, in which acetylene copper 1.5 mm was pressed into a stainless steel tube with an inner diameter of 1 willow and an outer diameter of 2 willow, was used as a "gypsum ball with a diameter of 2.5" inserted into a pig's ureter. When it came in contact with and exploded, the stone ball was completely crushed, but no damage to the ureter was observed.

Lead azide i. When a similar experiment was conducted using No. 5-9, the plaster ball was crushed, but at the same time, the ureter was also ruptured, resulting in major damage.

[Brief explanation of the drawing]

2 is a schematic sectional view showing another embodiment of the crushing device of the present invention, and FIG. 2 is a schematic sectional view similar to FIG. 1 showing another embodiment. Wealth...Pipe body, 2... Explosive compression layer, 3...Resistance wire 4...Legs, 5...Grave filling material 6. Optical fiber.

Claims (1)

[Scope of Claims] 1. An explosive layer formed by pressing an acetylene metal compound into the tip of a tube that can be inserted into an organ in which a urinary stone is present is detonated by electric heat or laser light. Urinary stone crushing device. 2. Claim 1, wherein the acetylene metal compound is selected from acetylene silver and acetylene copper.
Apparatus described in section.