JPS63122446A - Ultrasonic stone destructing 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 [Field of Industrial Application] The present invention relates to an ultrasonic stone destruction device that destroys stones generated in a living body using ultrasonic vibrations.

[Conventional technology]

In recent years, an ultrasonic stone destruction device (hereinafter referred to as an ultrasonic lithotripter probe) has been developed and put into practical use, using ultrasonic vibrations to destroy stones that occur in the body (e.g., bladder, ureter, kidney, etc.). It has been reached. This ultrasonic lithotripsy probe consists of a gripping part with a built-in vibrator and a vibration transmission member that transmits ultrasonic vibrations to the stone, and this vibration transmission member is inserted into the body cavity through the treatment instrument insertion channel of the endoscope. It is inserted and the tip is pressed against the stone to crush the stone.

[Problem that the invention seeks to solve]

Incidentally, a small-diameter metal vibrator is normally used as the vibration transmission member of such an ultrasonic lithotripter probe, but the metal vibrator is subject to severe wear when it comes to crushing stones, and its tip can become wedge-shaped if used for a long period of time. There was a problem with the stone becoming chipped and getting stuck in the stone, making it impossible to transmit vibrations.

Another drawback was that the inner diameter of the metal vibrator widened at the tip, making it more likely to become clogged with stones.

The present invention was made by focusing on these problems.
The purpose is to provide an ultrasonic lithotripsy probe with less wear at the tip.

[Means and operations for solving the problems] In order to solve the above problems, the present invention is characterized in that the tip of the vibration transmitting member is made of a ceramic material. That is, in the present invention, by configuring the tip of the vibration transmitting member with a ceramic material, wear of the tip can be significantly reduced.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows an embodiment of the present invention, and is a sectional view showing the structure of an ultrasonic lithotripter probe. This ultrasonic lithotripsy probe 1 has a grip portion 2 that is gripped by the operator.
and an insertion section 3 that is inserted into the body cavity through the treatment tool insertion channel of the endoscope, and the grip section 2 is connected to the outer case 4.
A Langevin type vibrator 5 is housed inside. The Langevin type vibrator 5 is constructed by disposing piezoelectric elements 6 and electrode plates 7 alternately between a front metal block 8 and a rear metal block 9, and a bolt 10 is attached to the rear end surface of the front metal block 8. It is integrated. This bolt 10 passes through the piezoelectric cable 6, the electrode plate 7, and the rear metal block 9, and protrudes from the rear end surface of the rear metal block 9, and a tightening nut 11 is screwed onto the end of the bolt 10. There is.

Further, a conical horn 12 is screwed onto the front end surface of the front metal block 8. A vibration transmission member 13 is connected to the tip of the horn 12 for transmitting ultrasonic vibrations generated by the vibrator 5 to the tip of the insertion section 3. This vibration transmission member 13 includes a small diameter metal vibrator 14 and a metal vibrator 14.
It consists of a ceramic vibrator 15 of the same diameter joined to the tip of the vibrator. Regarding the bonding technology between ceramics and metals, please refer to "Industrial Materials VOL, 33N (L8
There are various joining methods as described in 1985.3J.

In addition, through holes 16 and 17 are formed in the centers of the horn 12 and the bolt 10, respectively.
6.17 communicates with the inner hole 18 of the vibration transmission member 13 to form a suction hole 19. A suction cap 20 communicating with the suction hole 19 is screwed and fixed to the rear end wall of the exterior case 4. A suction tube (not shown) is connected to this suction cap 20, and the inside of the suction hole 19 can be suctioned by a suction device connected to the suction tube.

A horn cap 21 that surrounds the outer periphery of the horn 12 is detachably attached to the front end of the outer case 4. Annular grooves 22 and 23 are formed inside the tip of the horn cap 21, and elastic O-rings 24 are fitted into each of these annular grooves 22 and 23 to connect the tip of the horn 12 and the horn cap 21. It is kept airtight. Further, one end of a power cord 25 for applying a driving voltage is connected to the electrode plate 7 of the piezoelectric element 6. The other end of this power cord 25 passes through the rear end wall of the exterior case 4 and is connected to a power supply device (not shown).

When performing stone destruction using the ultrasonic lithotripsy probe 1 configured in this way, the vibration transmission member 13 is inserted into the body cavity through the treatment instrument insertion channel of the endoscope, and the tip of the vibration transmission member 13 is inserted into the body cavity through the treatment instrument insertion channel of the endoscope. Aim at the stone. When a driving voltage is applied to the piezoelectric cord 6 from a power supply device (not shown) via the power cord 25, ultrasonic vibration is generated in the Langevin type vibrator 5, and this ultrasonic vibration is amplified by the horn 12 and transmitted. It is transmitted to member 13. When the tip of the vibration transmitting member 13 is pressed against the stone in this state, the ultrasonic vibration becomes a destructive force and can destroy the stone. In this embodiment, since the ceramic vibrator 15 is bonded to the tip of the metal vibrator 14, ceramics are much harder than calculus, so there is almost no wear, and good stone crushing can be carried out over a long period of time.

Note that the present invention is not limited to the above embodiments.

For example, as shown in FIG. 2, the inner diameter of the ceramic vibe 15 is made smaller than the inner diameter of the metal vibe 14, or as shown in FIG. 3, a tapered tapered portion 26 is formed on the inner peripheral surface of the ceramic vibe 15. Good too. In this way, the calculus sucked from the inner hole of the ceramic vibrator 15 is sufficiently smaller than the diameter of the suction hole 19.
clogging can be prevented.

〔Effect of the invention〕

As explained above, according to the present invention, the tip of the vibration transmission member that transmits ultrasonic vibrations is made of a ceramic material, so it is possible to provide an ultrasonic lithotripter probe with less wear on the tip.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of an ultrasonic lithotripsy probe showing one embodiment of the present invention, and FIGS. 2 and 3 are cross-sectional views of the tip portion showing other embodiments of the present invention. 1... Ultrasonic lithotripter probe, 5... Vibrator, 13.
... Vibration transmission member, 14... Metal vibrator, 15...
ceramic pipe. Applicant's agent Patent attorney Atsushi Tsuboi〈 Figure 3

Claims (1)

[Claims] An ultrasonic stone destruction device characterized in that the tip of a vibration transmission member that transmits ultrasonic vibrations is made of a ceramic material.