JPH0595957A - Ultrasonic therapeutic apparatus - Google Patents

Abstract

PURPOSE:To provide a highly safe ultrasonic therapeutic apparatus which achieves higher operability with easy holding of a handpiece by achieving a finer diameter of a grip part while ensuring an insulating property between electrodes of an ultrasonic vibrator. CONSTITUTION:In an ultrasonic therapeutic apparatus which has an ultrasonic vibration element part 2 to generate an ultrasonic vibration, a horn 6 linked thereto, an ultrasonic wave transmitting member 7 linked to the horn and a casing 10 which composes a grip part 17 while at least covering the perimeter of the ultrasonic vibration element part 2, the casing 10 is made of metal while an electrically insulating cylindrical member 15 is interposed between the ultrasonic vibrator part 2 and the casing 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ultrasonic therapeutic device such as an ultrasonic scalpel, an ultrasonic scaler, an ultrasonic lithotripter, etc., which treats ultrasonic waves.

[0002]

2. Description of the Related Art The general structure of an ultrasonic therapeutic device of this type is such that an ultrasonic vibrator, which integrally connects an ultrasonic vibration element portion, a horn and an ultrasonic vibration transmission member, serves as a grip portion. It is covered with a casing (Japanese Patent Laid-Open No. 62-21795).
No. 1).

The amplitude of the ultrasonic vibration generated by the ultrasonic vibration element section is amplified by the horn, and this vibration is transmitted to the ultrasonic vibration transmission member. Then, the tip of the ultrasonic vibration transmitting member is applied to a living tissue or a calculus, and ultrasonic vibration is applied to the living tissue through the ultrasonic vibration transmitting member, and the vibration energy is used to excise the living body or crush stones. ing.

Further, in order to facilitate the surgical work of cutting or crushing, at the same time as the procedure of cutting or crushing, a perfusate is sent to the affected area for cleaning, and the crushed tissue piece is transmitted by ultrasonic vibration. Suction and removal is performed from the tip opening of the suction hole formed in the member.

When a Langevin vibrator (BLT) for bolting the ultrasonic vibrating element section is used, the negative and positive electrodes are exposed on the side surface of the ultrasonic vibrating element section. Also,
A lead wire is connected to this electrode end.

By the way, in the ultrasonic vibration element portion, electrically short-circuiting between the electrodes leads to a serious failure. Therefore, it must be designed to avoid the possibility as much as possible.

On the other hand, since the casing that covers the ultrasonic vibrating element serves as the grip portion, it is necessary to design the outer diameter of the grip portion as small as possible in order to make the hand piece with good operability. Therefore, inevitably, the gap between the outer circumference of the ultrasonic transducer section and the inner diameter of the casing is narrowed, but the gap between the outer circumference of the ultrasonic transducer section and the inner surface of the casing is narrow, and the casing is made of metal. Therefore, through the casing, an electrical short circuit easily occurs between the electrodes in the ultrasonic transducer section. Therefore, in a conventional handpiece for an ultrasonic therapeutic device, a non-conductive material such as plastic is used for the casing.

[0008]

However, in the conventional ultrasonic therapy device, when a casing made of plastic is used, a thick one having a thickness of about 2 mm or more is required to secure the strength of the casing. Even if the gap between the outer circumference of the ultrasonic transducer section and the inner circumference of the casing is closed, the outer diameter of the casing will be large, and the grip will become thick, making it difficult to grip the handpiece. As a result, the operability of the handpiece has been impaired.

The present invention has been made in view of the above-mentioned problems, and an object thereof is to reduce the diameter of the grip portion,
An object of the present invention is to provide an ultrasonic therapeutic device which is easy to grip the handpiece and has good operability and which is capable of ensuring insulation between electrodes of the ultrasonic vibrator and having high safety.

[0010]

In order to solve the above-mentioned problems, an ultrasonic therapeutic device according to the present invention comprises an ultrasonic vibration element section for generating ultrasonic vibration, a horn connected to the ultrasonic vibration element section, and a horn. An ultrasonic treatment device having a connected ultrasonic transmission member and a casing that covers at least the periphery of the ultrasonic vibration element portion and constitutes a grip portion, in which the casing is made of metal and at least the ultrasonic transducer An electrically insulating tubular insulating member is provided between the portion and the casing.

[0011]

According to the structure of the present invention, the outer diameter of the gripping portion can be made small to form a handpiece that is easy to grip and has good operability, and the electrical insulation between the electrodes of the ultrasonic transducer can be improved. It becomes a safe ultrasonic therapy device.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a handpiece 1 in an ultrasonic therapeutic device according to an embodiment of the present invention. A Langevin transducer (BLT) is used as the ultrasonic transducer. A plurality of ultrasonic vibration element units 2 for generating ultrasonic vibration
Electrodes 3 are sandwiched in front of and behind, respectively, and a lead wire 4 is electrically connected to a protrusion 3a formed integrally with each electrode 3 by connecting means such as solder. By supplying electric energy of ultrasonic frequency to the electrode 3 from the power cord 5 through the lead wire 4, the ultrasonic vibration element unit 2 generates ultrasonic vibration in the axial direction.

The ultrasonic vibration in the axial direction generated in the ultrasonic vibration element section 2 is expanded in amplitude by the horn 6, and the expanded ultrasonic vibration is transmitted to the ultrasonic transmission member 7. ..

In this handpiece 1, a backing plate 8 is provided on the rear side of the ultrasonic vibrating element portion 2 in order to balance resonance, and the ultrasonic vibrating element is provided between the horn 6 and the backing plate 8. The part 2 is sandwiched, and the horn 6 is further inserted.
The backing plate 8 and the backing plate 8 are fastened together with bolts 11 and nuts 12, and the ultrasonic vibration element portion 2 is fastened together to have a fixed structure.

Here, the ultrasonic transducer is constituted by including the ultrasonic transmission member 7 fixed to the tip of the horn 6. The ultrasonic transducer is covered by a casing 10 described later except the ultrasonic transmission member 7.

Further, inside the ultrasonic transducer, the ultrasonic transmission member 7, the horn 6 and the bolt 11 are provided inside.
It has a fluid passage 13 communicating therewith. The rear end of the fluid passage 13 is connected to the suction base 14 which penetrates the rear end wall of the casing 10 described above in a liquid-tight manner.

An inner end portion of the suction cap 14 is fitted on the outer periphery of the rear end portion of the bolt 11, and a seal ring 15a is interposed between the both. At the outer end of the suction base 14,
A suction tube 16 leading to a suction pump (not shown) is connected.

The casing 10 forms the grip portion 17 of the handpiece 1 by the outer peripheral surface portion thereof as described above. The casing 10 is made of metal, for example, an aluminum alloy so as to be thin, and the gap between the portion of the ultrasonic transducer portion 2 of the handpiece 1 and the inner surface of the casing 10 is
The space is such that the protrusion 3a of the electrode 3 can be inserted therein.

The lead wire 4 for supplying the electric energy to the electrode 3 is connected to the projecting portion 3a of the electrode 3 in the space around the ultrasonic vibration element portion 2 by a connecting means such as solder. Covered with 10. That is, the electrically exposed portion of the ultrasonic transducer is covered with the casing 10. A tubular insulating member 15 made of electrically insulating plastic or mica is fitted to the inner peripheral surface of the casing 10 covering the electrically exposed portion of the ultrasonic transducer. The insulating member 15 constitutes a shielding means for avoiding leakage, sparks, etc. from the electrode 3.

The large-diameter edge portion 6 on the base end side of the horn 6
The a is attached to the inner periphery of the casing 10 in a liquid-tight manner so as to be in close contact therewith. The power cord 5 and the suction cap 14 that penetrate the rear end wall of the casing 10 also penetrate the casing 10 in a liquid-tight manner. Therefore, the liquid-tight space 9 is formed in the casing 10 at the portion covering the ultrasonic transducer element 2.
Has become.

Then, the tip end of the ultrasonic transmission member 7 is applied to the affected tissue (not shown), and electric energy of ultrasonic frequency is supplied to the electrode 3 from the power cord 5 through the lead wire 4 to move the ultrasonic vibration element portion 2 to the ultrasonic vibration element portion 2. Drives and generates ultrasonic vibration in the axial direction. By applying ultrasonic vibration to the affected tissue through the ultrasonic transmission member 7, the affected tissue is cut, emulsified, or stones are crushed.

By suctioning through the fluid passage 13 of the handpiece 1 with a suction pump (not shown), the cut, emulsified affected tissue or crushed calculus piece is sucked through the fluid passage 13, and the suction mouthpiece 14, Aspirate through the suction tube 16.

In the handpiece 1 having the above-described structure, even if the casing 10 is made thin, the insulating member 15 is provided in the space between the vicinity of the ultrasonic transducer portion 2 and the casing 10 covering the ultrasonic transducer portion 2. Therefore, it is not necessary to make a particularly large gap for ensuring insulation, the outer diameter of the grip portion 17 is thin, and the handpiece 1 is easy to grip and has good operability.
Can be configured. Furthermore, the insulating member 15 positively enhances the insulating property between the electrodes 3 of the ultrasonic transducer, and thus a safe ultrasonic treatment device can be obtained.

FIG. 2A shows another embodiment of the present invention. Also in this embodiment, as in the case of the above-described first embodiment, a cylindrical insulating member 15 is provided in close contact with the inner surface portion of the casing 10 that covers the periphery of the ultrasonic vibration element portion 2. Furthermore, in this embodiment the casing 1
A sheath 18 that covers the outer circumference of the ultrasonic transmission member 7 is connected to the tip of 0.

At the front end of the casing 10, there is provided a water supply mouthpiece 22 for supplying the reflux liquid to the ultrasonic treatment site through the sheath 21. The reflux liquid is supplied from a water supply pump (not shown) through the water supply tube 23 through the water supply pipe 22 through the sheath 21. The reflux liquid is the sheath 21
It is possible to wash the affected area by flowing while cooling the ultrasonic transmission member 7 while flowing inside and discharging from the distal end opening of the sheath 21 toward the affected area.

A casing 10 for covering the ultrasonic vibration element portion 2.
A liquid-tight space 9 is formed inside, and a check hole 24 for communicating the space 9 with the outside is formed in the wall portion of the casing 10. A sealing screw 25 is usually screwed into and sealed in the check hole 24.

The sealing screw 25 is a check nozzle 26.
Can be exchanged for. This check nozzle 2
6 is mounted, and compressed air is supplied to the space 9 of the casing 10 through an unillustrated tube connected to the check nozzle 26 by an unillustrated air supply pump or a syringe.
To be able to inhale.

When the watertightness of the casing 10 is to be inspected, the sealing screw 25 is replaced by a check nozzle 26 and compressed air is sent to the space 9 of the casing 10 while the entire handpiece 1 is submerged. Soak in.

At this time, when the watertightness is impaired, air leaks into the water to generate bubbles, which makes it easy to confirm the presence or absence of water leakage and its location. This inspection can be easily performed not only at the time of shipment but also on the side of the user, so that it is possible to confirm the presence or absence of a failure of the device before surgery.

It is to be noted that the handpiece 1 in the first embodiment is also provided with such a check hole 24 so that the sealing screw 25 and the check nozzle 26 can be exchanged with each other. ).

[0031]

As described above, according to the present invention, the casing covering the acoustic wave oscillator may be made of a thin metal, and an electrically insulating member is provided in the gap between the ultrasonic oscillator and the casing. Therefore, it is not necessary to make a large gap for insulation, and the gap can be made as narrow as possible. Therefore, it is possible to provide a handpiece which has a small outer diameter of the grip portion and is easy to grip and has good operability. Moreover, since the insulation between the electrodes of the ultrasonic transducer is positively performed through the insulating member, the insulation between the electrodes is enhanced, and there is no leak or spark, and both the operator and the patient receive an electric shock. It is possible to provide an ultrasonic therapeutic device that does not cause a malfunction.

[Brief description of drawings]

FIG. 1 is a sectional view of an ultrasonic therapeutic device according to an embodiment of the present invention.

2A is a sectional view of an ultrasonic therapeutic device according to another embodiment of the present invention, and FIG. 2B is a sectional view of a modified example of the ultrasonic therapeutic device according to an embodiment of the present invention.

[Explanation of symbols]

1 ... Handpiece, 2 ... Ultrasonic vibration element part, 3 ... Electrode,
7 ... Ultrasonic transmission member, 10 ... Casing, 15 ... Insulating member, 17 ... Gripping part.

Claims (1)

[Claims] 1. An ultrasonic vibration element section for generating ultrasonic vibration, a horn connected to the ultrasonic vibration element section, an ultrasonic transmission member connected to the horn, and at least covering the periphery of the ultrasonic vibration element section. In an ultrasonic therapeutic device having a casing constituting a grip portion, the casing is made of metal, and an electrically insulating tubular insulating member is interposed at least between the ultrasonic transducer portion and the casing. An ultrasonic therapeutic device characterized by being provided as above.