JPS59151949A - Urinal tract stone breaking apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for crushing ureteral stones.

Traditionally, methods for removing urinary stones include dissolving them with medicine, attaching a basket to the end of a thin metal wire to capture the stones and pulling them out of the body, and using explosives to remove stones. Methods of crushing and removing stones are known, and among these methods, the method of capturing stones with a basket involves inserting a member with a guiding pug at the tip and a spiral basket at the root into the ureter, and inserting a member into the ureter. After the guiding bougie passes through the stone, the basket is expanded to capture the stone and pull it out. Although it is effective, it requires skill to hold the captured stone so that it does not dislodge. If the tumor has already become enlarged, surgery must be performed. Next, the method of fragmentation using explosives involves applying an explosive to the surface of the stone through a catheter fitted with explosives, detonating it from outside the body using electricity or laser, and crushing the stone into small pieces that are then expelled naturally. This makes it the most effective method, but in reality, the stones are easy to move, so it takes a lot of effort to bring the explosive into contact with the stones, and even after they have been brought into contact, they are not fixed together. The crushing effect of the explosion was extremely insufficient, and as a result, there was a high risk that the amount of explosives would be used in excess of a predetermined amount, leading to damage to the ureter.

In contrast, the present invention focuses on the fact that if a stone is fixed by the above-mentioned method of pulling out a stone using Baskent and then crushed while maintaining this state, it can be crushed with the minimum crushing force. The embodiment of the present invention will be described with reference to the drawings. As shown in FIG. Basket 3 consisting of filaments 2...
A flexible inner tube 4 connected to the circumferential surface of the distal end is fitted and housed in an equally flexible outer tube 5 having a slightly larger diameter than this inner tube. Explosives from the tip 6
, a detonator 7, and a push tube 8 are connected in sequence to form a stone crushing mechanism B consisting of a series of wire rod-like members.

This device has the above configuration and is used as shown in FIG. That is, the bougie 1 is inserted into the tip of the inner tube 4, the filaments 2 are bent along the outer peripheral surface of the inner tube 4, and then the bougie 1 is inserted into the outer tube 5 and integrated. Insert into the ureter, and when the bougie 1 is positioned beyond the stone, insert the outer tube 5.
When the inner tube 4 and the ureter are slightly pulled out, the filament 2° extending from the outer tube 5 into the ureter expands in all directions due to its elasticity, forming a basket 3 to surround the stone as shown in the figure. Next, a push rod 8 having an explosive 6 at its tip is sent into the inner tube 4 to press the front of the explosive 6 against the rear end of the stone. Hold this state and detonator 7
The explosive is detonated through the O-leg wire 9 to perform the required fragmentation.

As described above, the stone catching mechanism A having the basket 3 surrounds and captures the stone, and the rod-like stone crushing mechanism B made of the conductor 8 presses the explosive 6 sufficiently against the stone to cause it to explode. The crushing force of the explosion is most effectively exerted, so the amount of explosives can be kept to a minimum, and the above-mentioned drawbacks of the prior art can be eliminated.

As mentioned above, in the present invention, since it is possible to reliably transmit impact force to a sufficiently captured stone, the crushing mechanism B is not limited to explosives, and a drill as shown in Fig. 3 can be used. It's okay.

That is, Fig. 3 shows a case where a drill with a flexible shaft 8' having a tip 6' is used for the explosive charge υ in Fig. 2, and other parts are indicated by the same symbols as in Fig. 2. ing.

Next, FIG. 4 shows that a basket 3 is used as a calculus catching mechanism A in place of the filament having the bulge, and the filament 2' is formed by bending the tip inward in advance to form a hook portion 1'. By forming the stone, the hook part 1' can be directly hooked onto the calculus and pulled into a rake-like shape without using a pudge.

FIG. 5 shows a state in which a stone crushing mechanism B made of explosives is used in combination with the stone capturing mechanism A shown in FIG.
Similarly to the figure, each filament 2', which is a basket 3, is prepared in advance.
is inserted into the outer tube 5, and then the inner tube 4 is pushed out to push out the filaments 2'..., and the stone is removed through each filament 2', which expands due to its elasticity. It is intended to surround and capture. As in FIG. 2, stones are crushed through a stone crushing mechanism B, and each part is designated by the same reference numerals as in FIG.

As described above, the present invention has many advantages, such as being simple in structure, reliable in operation, capable of crushing stones and allowing them to be naturally discharged with a small amount of external force, and being easy and safe to operate.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is an exploded cross-sectional view, FIG. 2 is a cross-sectional view showing the state of use, and FIG.
FIG. 4 is a cross-sectional view showing another example of the stone trapping mechanism; FIG. 5 is a cross-sectional view showing a state in which the stone trapping mechanism shown in FIG. 4 is used. . Symbols in the figure: A is a stone capture mechanism, B is a stone crushing mechanism, 1 is a bougie, 1' is a hook, 2.2' is a filament, 3 is a basket, 4 is an inner tube, 5 is an outer tube, 6 is a Explosive, 8 is a push tube, 6' is a drill tip, and 8' is a flexible shaft. Patent Applicant Makoto Ishizaka, Director of the Agency of Industrial Science and Technology (and 1 other person) Sub-Agent Patent Attorney Satoshi Ikeura

Claims (1)

[Claims] (1) Inside the flexible outer tube, a flexible inner tube is provided with a basket shaped like several filaments to expand around the tip and surround the calculus, and the basket is compressed. hold in the state
A ureteral stone crushing device 3 consisting of a calculus capturing mechanism that is fitted and accommodated, and a stone crushing mechanism that is a series of rod-shaped rods that are to be pushed into the inner canal, and whose tip is formed in the part that is to be crushed by contacting the stone. ．．