JPS62114545A - Ultrasonic stone crushing probe - 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 [Field of Industrial Application] The present invention relates to an ultrasonic lithotripter probe for destroying stones formed in a living body such as a kidney or ureter using ultrasonic waves.

[Prior Art] In order to improve the stone crushing power of this type of ultrasonic lithotripter probe, it has been proposed to provide a movable impact body at the tip of the vibration transmission member (Japanese Patent Laid-Open No. 49-21989
Publication No.). According to this, the ultrasonic vibration propagated by the vibration transmission member is converted into a high impact force with a low frequency, so
Stone crushing power increases.

[Problems to be Solved by the Invention] However, the above system in which the impact body is provided has the following four drawbacks.

In order to perform stone crushing using a floating impact body, it is necessary to press the vibration transmission member against the stone with a certain amount of force and maintain sufficient contact between the impact body and the vibration transmission member. Here, if the stone is relatively small and in a floating state, the pressing force will not be sufficient, and therefore the stone crushing efficiency will be significantly reduced.

Further, an impact body is provided at the tip of the vibration transmission member, and since these are always in contact with each other, a large amount of stress is always concentrated near the contact point.

This phenomenon tends to lead to early damage, breakage, etc. of the vibration transmission member and the impact body. If this damage or folding occurs during surgery, it will be a major hindrance to the surgery.

On the other hand, when a relatively small stone is to be crushed, the stone crushing efficiency is better if no impactor is provided for the reasons mentioned above. Therefore, even in the case of a large stone, such as a coral-shaped stone, it is recommended to first crush the stone with a vibration transmission member equipped with an impactor at the tip, and once the stone has been reduced to a certain size, it can be replaced with one without an impactor. desirable. However, this replacement method, in which the entire probe is replaced, requires two probes to be prepared in advance, which is not only uneconomical, but also requires time and effort to manage the sterilization process. In addition, if the vibration transmission member itself is to be removed from the horn section and replaced with another one, it is necessary to use a wrench or other jig to securely attach and detach the member to avoid vibration transmission loss, and this work must be performed surgically. It's too complicated to do inside.

The present invention has been made with attention to the above-mentioned problems, and its purpose is to solve the above-mentioned problems by easily attaching and detaching the impacting body according to the condition of the stone, and by making it possible to crush stones in an optimal state at all times. In the present invention, a vibration transmitting member is provided with an outer cylindrical member that is detachably fitted in a non-contact state, and furthermore, an impact body is freely movably provided at the tip of the outer cylindrical member. This ultrasonic lithotripter probe is configured to be separated from the vibration transmission member and come into contact with the vibration transmission member during stone crushing.

[Operation] When using the impactor, the outer cylinder member is attached, and when the impactor is not used, the outer cylinder member is removed and the lithotripter probe is used. When the impact body is not crushing stones, it is separated from the vibration transmission member, and when crushing stones, it comes into contact with the vibration transmission member and receives vibrations.

[Example] FIG. 1 shows a first embodiment of the invention.

The ultrasonic lithotripsy probe 1 of this embodiment consists of a gripping part 2 and an insertion part 3, and a Langevin type vibrator 5 is installed in a case 4 of the gripping part 2.

A power cord 6 is connected to this Langevin type vibrator 5, and this power cord 6 penetrates the rear end wall of the case 4, is led out, and is connected to a power supply device (not shown). . In addition, this Langevin type oscillator 5
is supported and fixed to the case 4 using the vicinity of the joint. Further, the base end of a conical vibration amplifying horn 8 is connected and fixed to the front end of the vibrator 5. A pipe-shaped vibration transmitting member 11 made of metal is connected to the tip of the horn 8 via a connecting ring 9. Further, the vibration transmission member 11 can be attached to and detached from the horn 8 by using a tool such as a spanner.

On the other hand, the horn 8 is covered by an exterior cap 12 screwed and fixed to the tip of the case 4, and the inner surface of the exterior cap 12 is in a non-contact state with the horn 8.

Further, the vibration transmitting member 11 is fitted with an outer cylinder member 13 made of resin such as polyacetal in a non-contact manner. A tube 14 is attached and fixed to the proximal end of this outer cylinder member 13, and the tube 14 is attached to the outer cap 1.
It is screwed into a threaded portion 15 formed on the outer periphery of the distal end portion of the holder. That is, the outer cylinder member 13 is detachably attached to the outer cap 12.

Further, a thick short tubular impact body L7 is attached to the distal end of the outer cylinder member 13 via a metal holding tube 16 so as to be able to reciprocate in the longitudinal direction of the insertion portion 3. That is, the holding tube 16
is fixed to the tip of the outer cylinder member 13, and further,
A locking collar 18 is formed at the tip of the holding tube 16 and projects inward. The locking tab 18 is slidably engaged with a circumferential groove 19 formed on the outer periphery of the impact body 17, while the inner end portion of the impact body 17 is inserted into the holding tube IB. It is designed to make a sliding contact. That is, the impact body 17 can be reciprocated in the longitudinal direction of the insertion section 3 by the holding tube 1B.

Then, the impact body 17 moves forward and the vibration transmission member 11
It is designed so that it can stand by close to the tip 21 of the robot but slightly away from it.

Note that each inner hole 22 of the vibration transmission member 11 and the impact body 17
．． 23 communicate with each other, and further communicate with a through hole 24 formed inside the horn 8 and the vibrator 5. Further, this through hole 24 communicates with a base 25 provided on the rear end wall of the case 4 of the grip portion 2 .

A suction tube (not shown) is connected to this base 25, and is further connected to a suction pump (not shown) via this suction tube.

Next, the operation of the ultrasonic lithotripter probe 1 having the above configuration will be explained.

First, when attempting to crush a relatively large stone, the outer cylinder member 13 is attached to the insertion section 3, and the impact body 17 is attached, as shown in FIG. The insertion section 3 is inserted into the body cavity and its tip is brought close to the calculus, and the vibrator 5 is activated to generate ultrasonic vibrations. This generated ultrasonic vibration is amplified by the horn 8 and then propagated to the tip side via the vibration transmission member 11. Therefore, the impact body 17 is pressed against the stone.

As a result, the impacting body 17 retreats and hits the tip 21 of the vibration transmitting member 11 and receives ultrasonic vibration, but the low frequency amplitude is converted into a large impact force and performs a stone crushing action.

Once the stone is crushed in this way and becomes small to a certain extent, the stone will escape even if the impactor [7] is pressed against it, resulting in a significant drop in stone crushing efficiency.

Therefore, in this case, the insertion section 3 is once pulled out and then the outer cylinder member 13 is removed. As a result, the impact body 17 is also removed at the same time. In other words, the insertion section 3 is connected to the vibration transmission member 11.
Only. Then, insert it again and its tip 21
is brought into direct contact with the stone and ultrasonic vibrations are applied. Since the vibration in this case has a minute amplitude and a high frequency, even small stones are difficult to escape, and therefore stones can be crushed efficiently.

Note that since the outer cylinder member 13 can be easily attached and detached using the threaded portion 15, it does not interfere with the progress of the surgery.

In addition, when using the impact body 17, when the impact body 17 is on standby without being pressed against the stone, the vibration transmission member 11
Since it is separated from the tip 21 and is in a non-contact state, there is no unnecessary collision and stress concentration does not occur. Therefore, damage or bending of the impact body 17 and the like is avoided as much as possible, thereby improving safety during surgery.

FIG. 2 shows a second embodiment of the invention.

In this embodiment, the tip of the impact body 17 is formed into a trumpet shape, and a plurality of notches 32 are formed in the edge 31 of the tip. Further, an elastic O-ring 33 that contacts the inner surface of the outer cylinder member 13 is provided on the outer periphery near the tip of the vibration transmitting member 11 to ensure a distance between the two.

3 and 4 show a third embodiment of the present invention.

In this embodiment, the tip 21 of the vibration transmitting member 11 and the rear end surface 34 of the impact body 17 that collides with the front end 21 of the vibration transmitting member 11 and the rear end surface 34 of the impact body 17 that collide with the vibration transmission member 11 are each formed into a ratchet shape. Body 17 was made to rotate. In this way, since the impact body 17 rotates during stone crushing, the stone crushing force is further improved.

In the system of this embodiment, it is more effective if the tip of the impact body 17 is formed into a spiral shape as shown in FIG.

[Effects of the Invention] As explained above, according to the present invention, the impact body can be easily attached and detached by attaching and detaching the outer cylinder member that does not participate in vibration transmission, and the impact body can be attached and detached depending on the condition of the stone. , the stone can always be crushed in the best condition.

Further, even when an impact body is used, the vibration transmitting member and the impact body are in a non-contact state except when crushing stones, so that they are less likely to be damaged or broken due to stress concentration. Therefore, durability and safety during surgery can be improved.

[Brief explanation of drawings]

FIG. 1 is a side sectional view showing a first embodiment of the invention, FIG. 2 is a side sectional view of the vicinity of the tip of the second embodiment of the invention, and FIG. 3 is a third embodiment of the invention. FIG. 4 is a sectional view taken along the line IV--IV in FIG. 3, and FIG. 5 is a perspective view of the tip portion showing a modification of the third embodiment. 1... Ultrasonic lithotripter probe, 2... Gripping part, 3...
Insertion part, 5... Vibrator, 8... Horn, 11...
Vibration transmission member, 13... Outer cylinder member, 17... Impact body.

Claims (1)

[Claims] A detachable outer cylindrical member is fitted to the vibration transmitting member in a non-contact manner, and an impacting body is freely movable at the tip of the outer cylindrical member, which is slightly apart from the vibration transmitting member and can be contacted during stone crushing. An ultrasonic lithotripter probe characterized by being installed in.