JPS63302842A - Ultrasonic treatment apparatus - Google Patents

Abstract

PURPOSE:To prevent the reduction of the amplitude of the ultrasonic vibration at the leading end of a vibration transmitting member by the vibration amplifying action possessed by a tubular body, by constituting the vibration transmitting member by connecting a plurality of tubular bodies having a horn shape. CONSTITUTION:One end of a mount shaft 6 is screwed in the rear end surface of a conical horn 5, and an oscillation member 9 wherein piezoelectric elements 7 and electrodes 8 are alternately laminated and a sleeve 11 are successively externally fitted to the shaft 6 in a freely slidable manner to be held and fixed by a nut 12 to constitute a Langevin type vibrator 4. Tubular bodies 15 are constituted so that the length of each of them is set to 1/2 the wavelength of the ultrasonic vibration of the vibrator 4 and a male screw part 16 is provided to the base end surface thereof in a protruding state and threaded with a female screw part 17 in a freely detachable manner to form a vibration transmitting member 14. Even when the amplitude of the vibration of the vibration transmitting member 14 is lowered at the time of actual driving, the amplitude at the leading end thereof can be prevented from becoming lower than that of the ultrasonic vibration generated in the vibrator 4.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an ultrasonic treatment device for destroying stones, tissues, etc. in a body cavity using ultrasonic vibrations.

[Prior Art] Generally, an ultrasonic treatment device includes an ultrasonic transducer and a vibration transmission member that transmits ultrasonic vibrations generated by the ultrasonic transducer. By pressing the tip of the vibration transmitting member against a stone or tissue in the body cavity and vibrating it, the stone is crushed or the tissue is excised.

[Problems to be solved and attempted by the invention] Incidentally, in an ultrasonic treatment device having such a structure, there are two modes: an actual driving time when used in combination with an endoscope, and an idle driving time when not used for actual treatment. Since the resistance applied to the vibration transmitting member is different between the two, there is a large difference in the amplitude of the vibration at the tip. In other words, during actual operation, the ultrasonic vibration is attenuated by the vibration transmission member coming into contact with the irrigation fluid used to secure the field of view of the endoscope or the inner surface of the channel through which the vibration transmission member passes, and the amplitude of the tip is reduced. It will drop. Furthermore,
Suction of crushed objects and irrigation fluid through the through-holes of the vibration transmission member also causes attenuation of ultrasonic vibrations, resulting in a decrease in the amplitude at the tip of the vibration transmission member. Therefore, there is a problem in that it is not possible to reliably and quickly perform treatments such as crushing stones and resecting living tissue using the vibration transmitting member.

This invention was made based on the above circumstances, and its purpose is to prevent the amplitude of ultrasonic vibrations at the tip of a vibration transmitting member from decreasing, and to crush stones, remove living tissue, etc. An object of the present invention is to provide an ultrasonic treatment device that can reliably perform treatment.

[Means and effects for solving the problems] In order to solve the above problems, the present invention includes an ultrasonic vibrator and a vibration transmission member that transmits ultrasonic vibrations generated by the ultrasonic vibrator. In the ultrasonic treatment device, the vibration transmission member is configured by connecting a plurality of horn-shaped tubular bodies,
The vibration amplification effect of the tubular body prevents the amplitude of the ultrasonic vibration at the tip of the vibration transmission member from decreasing.

[Embodiment] An embodiment of the present invention will be described below with reference to FIGS. 1 to 5. The ultrasonic vibration device 1 shown in FIG.
It is equipped with This hand portion 2 has a case 3, and a vibrator 4 is built in the case 3. This vibrator 4
is structured as follows. That is, numeral 5 in the figure is a conical horn, and one end of a mounting shaft 6 is screwed onto the rear end surface of the horn 5. An oscillating member 9 in which piezoelectric elements 7 and electrodes 8 are alternately laminated and a sleeve 11 are fitted on the mounting shaft 6 in a slidable manner, and these are attached to the mounting shaft 6.
It is held and fixed by a nut 12 screwed to the other end,
The vibrator 4 is of Langevin type.

The horn 5 and the mounting shaft 6 have a through hole 5a that communicates with each other.
s 6a is bored, and a base 13 is provided at the other end of the mounting shaft 6.
is attached. This mouthpiece 13 is connected to a vacuum pump, also not shown, via a hose, not shown. Further, a vibration transmission member 14 is connected to the tip of the horn 5. The vibration transmission member 14 is constructed by linearly connecting a plurality of tubular bodies 15 formed in the shape of a conical horn. That is, the length of the tubular body 15 is set to 1/2 of the wavelength of the ultrasonic vibration of the vibrator 4, and as shown in FIG. 2, a male threaded portion 16 is protruded from the proximal end surface. A female threaded portion 17 is formed on the inner surface of the tip. The plurality of tubular bodies 15 form the vibration transmission member 14 by removably screwing together the respective male threaded portions 16 and female threaded portions 17 . The proximal end of the vibration transmission member 14 is fitted into a tubular shape, thereby connecting the vibration transmission member 14 to the horn 5.

Note that the through hole 14a formed in the vibration transmission member 14 communicates with the through hole 5a of the horn 5.

Each tubular body 15 is also formed with a pair of flat portions 18 on which a tool (not shown) can be hung when attaching or detaching the tubular bodies 15. Furthermore, by setting the length of the tubular bodies 15 to 1/2 of the wavelength of the ultrasonic vibration, the antinode of the vibration is located at the connecting portion of each tubular body 15, as shown in FIG. .

When using the ultrasonic vibration device 1 configured as described above to crush a stone 22 formed in a kidney 21 as shown in FIG. is introduced into the kidney 21 through the sheath 24 of the kidney. Then, the inside of the kidney 21 is observed through the eyepiece 25 of the endoscope 23, and if a calculus 22 is found, the tip of the vibration transmitting member 14 is pressed against the calculus 22. If the vibrator 4 is operated in this state, the ultrasonic vibrations generated by the vibrator 4 will be transmitted to the tip of the vibration transmission member 14.
This causes the stone 22 to be crushed.

By the way, the vibration transmission member 14 is connected to the sheath 24 of the endoscope 23.
When the fluid is passed through the sheath 24 , it comes into contact with the vibration transmission member 14 , which flows through the sheath 24 to secure the field of vision, the inner surface of the sheath 24 , the treatment tool plug 26 of the endoscope 23 , or the through hole of the vibration transmission member 14 . Excluded matter and liquid sucked into the vibration transmission member 14 act as resistance to the ultrasonic vibration of the vibration transmission member 14 . As a result, the amplitude of vibration at the tip of the vibration transmission member 14 is reduced.

However, the vibration transmitting member 14 is constructed by connecting a plurality of horn-shaped tubular bodies 15, and the connecting point of these tubular bodies 15 is located at the antinode of the amplitude of the ultrasonic vibration. Therefore, each tubular body 1 having a horn shape
5 each have the function of amplifying ultrasonic vibrations, so during idle driving, the amplitude of the ultrasonic vibrations of the vibrator 4 moves toward the tip of the vibration transmitting member 14, as shown in FIG. will be amplified accordingly. Therefore, even if the amplitude of the vibration of the vibration transmission member 14 decreases due to the contact resistance as described above during actual driving, the amplitude at the tip can be prevented from becoming lower than the amplitude of the ultrasonic vibration generated by the vibrator 4. Therefore, the stone 22 can be crushed reliably and quickly.

FIG. 6 shows a second embodiment of the present invention, which differs in the connection structure of the tubular body 15 constituting the vibration transmission member 14.

In other words, the outer peripheral surface of the proximal end surface of the tubular body 15 is the tapered surface 26.
A fitting hole 28 having a diameter slightly smaller than the maximum outer diameter of the protrusion 27 is provided on the inner peripheral surface of the tip.
is formed, and the tubular body 15 is connected by fitting the fitting hole 28 and the convex portion 27.

Further, the shape of the tubular body 15 is a catenoidal shape 31a as in the third embodiment shown in FIG.

A stepped type 31b having a step 15a at the node of ultrasonic vibration as in the fourth embodiment shown in FIG. 8, or a stepped type 31b as in the fifth embodiment shown in FIG. 31c or the like may be used.

Further, the vibration transmitting member 14 may be constructed by connecting exponential-shaped tubular bodies 31d as in the sixth embodiment shown in FIG. 10, or as shown in FIG. Five types of examples 15.31 a, 3
It may be configured by combining lb, 31c, and 31d.

【Effect of the invention〕

As described above, in the present invention, the vibration transmission member for transmitting ultrasonic vibrations is formed by connecting a plurality of horn-shaped tubular bodies. Therefore, the amplitude of the tip of the vibration transmission member during idle driving is expanded by the vibration amplification effect of each of the tubular bodies that make up the vibration transmission member, so even if the vibration transmission member is subjected to various contact resistances during actual driving, The tip can be vibrated at an amplitude sufficient to effect a procedure such as, for example, breaking up a stone. In other words, the tip of the vibration transmission member can be vibrated with a large amplitude without using a vibrator with a large capacity.

[Brief explanation of the drawing]

1 to 5 show a first embodiment of the present invention, in which FIG. 1 is a sectional view of the entire device, FIG. 2 is a half-sectional side view of the connection structure between the tubular bodies, and FIG. 3 is the same. A plan view, FIG. 4 is an explanatory diagram showing the relationship between the vibration transmission member and the amplitude of vibration along the axial direction, and FIG. 5 is an explanatory diagram of the vibration transmission member introduced endoscopically into a body cavity. , FIG. 6 is a half-sectional view of a connecting structure of a tubular body showing a second embodiment of the present invention, and FIGS. 7 to 9 are half-sectional views of a tubular body showing third to fifth embodiments of the present invention, respectively. FIGS. 10 and 11 are side views of a vibration transmitting member showing a sixth and seventh embodiment of the present invention, respectively. 14... Vibration transmission member, 15... Tubular body. Applicant's agent Patent attorney Jun Tsuboi Figure 6 Figure 8 Figure 9

Claims (1)

[Claims] In an ultrasonic treatment device comprising an ultrasonic vibrator and a vibration transmission member that transmits ultrasonic vibrations generated by the ultrasonic vibrator, the vibration transmission member connects a plurality of horn-shaped tubular bodies. An ultrasonic treatment device comprising: