JPS58130033A - Crusher for stone in urinal tract - 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 ureteral lithotripter.

Although the cause of formation is unknown, stones sometimes form in the ureter, which is located between the kidneys and bladder of the human body. Stones are fine when they are small, but as they grow, they obstruct the flow of urine and have a negative impact on the human body. To remove these stones, drugs have been used to make them easier to wash away, and methods have been used to remove them through surgery.

However, drugs are a passive treatment, with no certainty of effectiveness, and have little effect once the stone grows larger than a certain size. On the other hand, surgery involves incising the ureter containing a stone, removing the stone, and suturing it. However, it is difficult to suture an extremely thin ureter with thread, and if the inner surface of the suture is not smooth, water may flow from the kidney. A small stone that has fallen may become stuck, and a larger stone may form again using the small fragment as a core. In addition, open surgery may cause after-effects such as adhesions of organs and peritoneum, and other accidents may occur depending on the patient's constitution. Furthermore, the hospital stay required for the surgery is several weeks, which is a great loss both personally and socially.

The ureteral stone crusher was invented to overcome these drawbacks. This is done by inserting a catheter through the bladder through the urethra or through the kidneys through the back, applying a ureteral lithotripter equipped with a small amount of explosives to the surface of the target stone, and inserting it from outside the body. Explosives are detonated electrically or with a laser, and the explosive force is used to crush the stones into small pieces and remove them from the ureter. However, since the ureter is a very thin and narrow tube, it is difficult to get the tip of the ureteral lithotripter in close contact with the stone, and if it is detonated while facing the ureteral wall, the thermal particles or gas generated by the explosion will penetrate the ureter. Damage or tearing may cause serious damage. Therefore, it is necessary to position the tip of this crusher in the center of the ureter so that it firmly contacts the surface of the stone, and to hold it so that the explosive force does not affect the wall of the ureter. This was not easy to do with conventional crushers.

The present invention addresses the drawbacks of the conventional ureteral stone crusher, and consists of covering the outer periphery of an explosive tube with an expandable body, and inflating this expandable body with gas or liquid to destroy the ureteral wall. The ureteral stone crusher is characterized in that it is enlarged to prevent damage to the ureter due to explosive products, and holds an explosive tube in the center of the ureter to safely and reliably crush ureteral stones. This is what we provide.

The ureteral calculus crusher of the present invention will be described according to one embodiment shown in the drawings. FIG. 1 is a longitudinal sectional view of the crusher, and in the figure 1 is an explosive tube with an explosive 2 attached to its tip. Reference numeral 3 denotes an expandable body placed over the outside of the explosive tube 1, having a hollow portion 3a inside, and a tip 3b protruding forward from the explosive 2 of the explosive tube 1.

4 is an outer tube for regulating the expansion around the expandable body only in a certain direction (forward), 5 is a central pipe, and at the tip of the axis 5a of the pipe is a head on which the explosive 2 is placed. 5b. 5c is a space around the axis 5a in the pipe 5, and 6 is a small hole formed in the walls of the expandable body 3 and the explosive tube l, which communicates the space 5c with the hollow portion 3a of the expandable body.

As a result, from outside the body, the hollow part 3 is passed through the space 5c and the small hole 6.
When aK liquid or gas is sent to inflate the expandable body 3, the tip 3b expands and opens as shown by the dotted line.

FIG. 2 is a sectional view showing this ureteral stone crusher 70 in a fecal use state. Apply it to the surface of. Next, gas or liquid is fed into the expansion body 3 through the central pipe 5. In this way, the expanding body 3 of the head of the crusher 70 comes into close contact with the surface of the calculus 100 as shown in the figure, and at the same time, the explosive 2 is also brought into close contact with the surface of the calculus 100 by the expanding body 3. Therefore, although not shown, the explosive 2 is detonated electrically or with a laser or the like using an ignition wire or open fiber attached to a crusher from outside the body, and the stone 10 is crushed with explosive force, and the stone 10 is broken into small pieces and deposited from the ureter 9. except. At this time, if necessary, a contrast agent may be added to the liquid sent into the inflatable body 3, and the inflatable body may be exploded after confirming that the inflatable body expands while viewing the X-ray image.

Note that when a stone cracks, its volume expands a little, making it difficult to come out of the ureter as it is. At that time, the tip 3b of the expanding body 3 is brought into close contact with the cracked stone and the stone is further expanded a little to make the stone easier to move.By repeating this operation, the stone can be removed.

FIG. 3 shows a method of using the ureteral stone crusher 7 to poke and directly push out a stone 10 using the pipe 5.

4 and 5 are longitudinal sectional views of another embodiment of the present invention, in which a thin expanding body 13 with a gas or liquid introduction tube 14 is attached to the top of the explosive tube 11, as shown in FIG. A ureteral stone crusher in which the tip 11a of the explosive tube and the center 13a of the distal end of the inflatable body are glued together so that they do not come apart, and of course the lower part 13b of the inflatable body is also hermetically bonded to the explosive tube 11 to prevent gas from leaking. shows. In the figure, 12 is an explosive, and 15 is an ignition device for the explosive. In the case of this crusher, as shown in FIG. 5, when gas or liquid is introduced from the outside through the introduction tubes 14 after being inserted into the ureter 9, the expandable body 13 expands, enlarging the ureter and expanding the explosive tube 11. It can be held in the central part of the ureter. In this case, since the expanding body 13 is very thin, there is no risk of reducing the destructive force even if it is adhered to the tip of the explosive.

In this way, by using the ureteral stone crusher of the present invention, it is possible to apply the explosive part to the stone while keeping it in the center of the ureter, and the expanded surface spreads around the explosive part and moves inside the ureter. Since the wall is protected, there is no risk of damaging the inner wall of the ureter, and stones can be safely crushed and removed from the ureter. Furthermore, by making the inflatable body larger, the ureter can be expanded, which has the excellent effect of promoting the expulsion of crushed and cranked stones.

[Brief explanation of the drawing]

The drawing shows one embodiment of the ureteral stone crusher according to the present invention, and #! FIG. 1 is a longitudinal sectional view of the crusher, and FIGS. 2 and 3 are longitudinal sectional views showing the crusher in use. Further, FIGS. 4 and 5 are longitudinal sectional views of another embodiment. Explanation of symbols 1... Explosive tube 2... Explosive 3... Expandable body 4... Outer tube 5... Center vibro... ... Small hole 7 ... Ureteral stone crusher 8 ... Catheter 9 ... Ureter 10 ... Stone Fig. 1 Fig. 5

Claims (1)

[Scope of Claims] The explosive tube is covered with an inflatable body, and this inflatable body is inflated with gas or liquid to expand the ureteral wall and prevent damage to the ureter from explosion products. A ureteral stone crusher characterized by holding an explosive tube in the center of the ureter to safely and reliably crush ureteral stones.