JPH0773581B2 - Ultrasonic therapy device - Google Patents

Description

TECHNICAL FIELD The present invention relates to an ultrasonic therapeutic device for incising or emulsifying a living tissue or crushing a calculus by utilizing ultrasonic vibration.

[Prior Art] Generally, as shown in FIG. 11, an ultrasonic therapeutic device has an ultrasonic vibrating element part 1, a horn 2 and an ultrasonic wave transmitting member 3, and a suction hole 4 is provided in a central axis of these parts. Ultrasonic transducer 5 provided
And a cover 7 that covers the ultrasonic transducer 5 and forms a grip portion 6. Then, the ultrasonic vibration generated by the ultrasonic vibration element unit 1 is amplified by the horn 2 and transmitted to the ultrasonic vibration transmission member 3, and the tip thereof is applied to a living tissue or a calculus. That is, ultrasonic vibration is applied to the biological tissue or the like to be removed through the ultrasonic vibration transmitting member 3, and the vibration energy can be used to excise the affected tissue, emulsify, or crush stones. Further, a backing plate 8 for balancing resonance is provided on the rear end face of the ultrasonic vibration element unit 1. The backing plate 8 is integrally formed with the ultrasonic vibration element unit 1 and the horn 2 by bolts 9. And the ultrasonic transducer 5 is formed. Then, a part of the horn 2 of the ultrasonic oscillator 5 has a point where the amplitude of ultrasonic vibration is 0, that is, a node, and a flange 10 is provided at this node. The flange 10 is abutted against a flange abutment portion 11 inside the cover 7, and is fixed to the cover 7 by a fixing ring 12 from the front side of the flange 10. A suction mouthpiece 13 communicating with the suction hole 4 is mounted on the rear end surface of the cover 7.

As described above, this ultrasonic treatment device amplifies the ultrasonic vibration generated by the ultrasonic vibration element unit 1 by the horn 2 and transmits the amplified ultrasonic vibration to the ultrasonic vibration transmission member 3, and the tip of the ultrasonic vibration transmission member 3 It is applied to a calculus, etc., and the vibration energy is used to perform work such as excision of the affected tissue, emulsification or crushing of the calculus, but in order to facilitate this surgical operation of cutting or crushing,
Simultaneously with the cutting or crushing treatment, the perfusate is sent to the affected area, and the crushed tissue pieces and the like are sucked and removed from the tip of the suction hole 4 while washing. This type of ultrasonic therapeutic device is widely used for ultrasonic scalpels, ultrasonic scalers, ultrasonic lithotripters, and the like.

By the way, when fixing the ultrasonic vibrator to the cover, as shown in, for example, Japanese Patent Laid-Open No. 63-193699, a fixing means is provided at a point where the amplitude of ultrasonic vibration is 0, that is, a node of the vibration.
The method of connecting with the cover is usually taken. However, in the ultrasonic transducer, it is difficult to accurately determine the point of the vibration node, and the position of the vibration node may change slightly depending on the driving method. If the ultrasonic transducer is solidly fixed to the cover at a point where there is amplitude that is not a node of vibration, it is necessary to supply more energy than necessary in order to suppress the movement of ultrasonic vibration. . Furthermore, ultrasonic vibrations are transmitted to the cover, which gives an operator an uncomfortable feeling, and in extreme cases, the hand becomes numb and numb, which is dangerous during surgery.

Therefore, for example, JP-A-53-143291 or USP44251
As shown in 15, a means for fixing to the cover via an elastic body such as rubber is taken near the node of the ultrasonic transducer,
For example, as shown in Japanese Unexamined Patent Publication No. 53-42591, a means for fixing an ultrasonic transducer by an elastic intermediate support is used.

[Problems to be Solved by the Invention] However, in the conventional ultrasonic therapeutic device, in the case where both sides of the flange of the ultrasonic transducer are fixed to the cover by restraining with O-rings or the like, ultrasonic vibration is applied to the cover. Because there is a lack of means for fixing the child in the rotational direction, an ultrasonic treatment device that has an asymmetrical tool at the tip of the ultrasonic transmission member, or an ultrasonic transmission member that is curved or bent in the middle There is a problem that it cannot be used for an ultrasonic therapeutic device having a direction of rotation such as an ultrasonic therapeutic device.

Further, since the ultrasonic transducer is fixed to the cover only by the elastic body, there is a drawback that it is difficult to position the central axis of the ultrasonic transducer with respect to the cover. In particular, in an ultrasonic treatment device that is long in the axial direction and has a large number of waves, if there is a misalignment between the center axis of the ultrasonic oscillator and the cover on the flange, the ultrasonic transmission member at the tip of the ultrasonic oscillator covers this. There is a problem that it strongly contacts the sheath and is scraped by the ultrasonic transmission member. Further, in the case of having an intermediate support between the ultrasonic transducer and the cover, the outer diameter of the cover inevitably increases,
There is a problem that it is difficult to grip and the operability is poor.

The present invention has been made in view of the above problems, and its purpose is to ensure that the central axes of the ultrasonic transducer and the cover are securely fixed without deviation, and the rotational direction of the ultrasonic transducer is Another object of the present invention is to provide an ultrasonic therapeutic device which can be positioned and which is less likely to transmit ultrasonic vibrations to the cover and has excellent operability.

[Means and Actions for Solving the Problems] In order to solve the above problems, the present invention provides a notch on the outer periphery of an ultrasonic vibration element portion, a horn, an ultrasonic transmission member, and a node portion for ultrasonic vibration. An ultrasonic transducer having a flange having a portion formed thereon, a cover having a butting portion that forms a notch and contacts the flange, and a cover that forms a gripping portion that covers the ultrasonic transducer; An anti-rotation ring having a protrusion that engages with the cutout and having a protrusion that engages with the cutout of the cover and an elastic body interposed between the flange and the cover is configured. Especially.

The elastic body before and after the flange of the ultrasonic vibrator allows the ultrasonic vibrator to make a small movement in the axial direction with respect to the cover, but since the rotation direction is positioned by the engaging means, The ultrasonic vibration is not transmitted to the cover without suppressing the acoustic vibration. Further, the positioning of the central axis and the rotation direction of the ultrasonic transducer and the cover is uniquely determined.

[Embodiment] Hereinafter, each embodiment of the present invention will be described with reference to the drawings.
The same components as those of the related art shown in FIG. 10 are designated by the same reference numerals and the description thereof will be omitted.

FIG. 1 and FIG. 2 show the first embodiment, in which two cutouts 20, 20 are symmetrically formed on the outer peripheral surface of a flange 10 provided integrally with the horn 2 of the ultrasonic transducer 5. Is provided. A detent ring 21 is fitted on the outer periphery of the flange 10, and the cutout portion is formed on the inner peripheral surface of the detent ring 21.
Correspondingly provided are protrusions 22, 22 that engage the 20, 20. Further, one end side of the detent ring 21 is provided with two projecting pieces 2 as projecting portions which are offset by 90 ° from the projecting portions 22 and 22.
3, 23 are integrated. The protrusions 23, 23 of the detent ring 21 are the flange abutting portions of the cover 7.
The engaging recesses 24, 24 (only one of which is shown) serving as a notch provided in 11 are engaged. Further, arc rubbers 25, 25 as elastic bodies are interposed between the flange abutting portion 11 and the rear surface of the rotation preventing ring 21, and the front surface of the rotation preventing ring 21 serves as an elastic body. The fixing ring 12 is provided via the ring rubber 26, and the fixing ring 12 is screwed into the threaded portion 27 of the cover 7 to form the flange 10
Can be fixed to the cover 7 via an elastic body.

That is, when assembling the ultrasonic transducer 5 to the cover 7, first, the flange 11 of the cover 7 is pressed against the flange 11 of the cover 7.
Then, the arcuate rubbers 25, 25 are joined while avoiding the engaging recesses 24, 24. Fit the rotation stop ring 21 on the flange 10 and
2 and 22 are engaged with the notches 20 and 20 of the flange 10. In this state, the ultrasonic transducer 5 is inserted from the front side of the cover 7, and the protruding pieces 23, 23 of the detent ring 21 are engaged with the engaging recesses 24, 24 provided in the flange abutting portion 11. In this state, the ultrasonic transducer 5 cannot rotate with respect to the cover 7, and the ring rubber 26 is bonded to the front surface of the rotation stop ring 21. further,
When the fixing ring 12 is located at the front part of the ring rubber 26 and screwed into the screw part 27 of the cover 7, the front and rear of the flange 10 are connected to the flange abutting part 11 via the arc rubbers 25, 25 and the ring rubber 26. The ultrasonic transducer 5 is sandwiched between the fixing ring 12 and the ultrasonic transducer 5 and fixed to the cover 7.

By providing the elastic body in the front and rear of the flange 10 in this way, the ultrasonic vibrator can elastically make a fine movement in the front-rear direction with respect to the cover 7, but the protrusions 22, 22 of the rotation stop ring 21. Engage the notches 20, 20 of the flange 10,
Since 23, 23 are engaged with the engaging recesses 24, 24 of the flange abutting portion 11, the ultrasonic transducer 5 is positioned in the rotational direction with respect to the cover 7.

Therefore, the flange 10 does not suppress the ultrasonic vibration and does not transmit the ultrasonic vibration to the cover 7. Therefore, an ultrasonic therapeutic device having high energy efficiency and high operability can be provided. Further, since the positioning of the ultrasonic transducer 5 and the central axis of the cover 7 in the rotation direction is uniquely determined,
Assembly workability can be improved.

3 and 4 show a second embodiment, in which a notch 20 is formed on the front surface of the rotation stop ring 21 from the rear of the flange 10.
Protrusions 28, 28 that engage with 20 are provided, and the rear end surface of the rotation-stop ring 21 is pressed and fixed to the flange abutting portion 11 of the cover 7 via the arc rubbers 25, 25. The same effect as the first embodiment can be obtained.

FIG. 5 shows a third embodiment, which is a rotation stop ring 21.
Is omitted, the fixing pin 29 protruding rearward is provided on the flange 10, and the fixing pin 29 is used for the flange abutting portion of the cover 7.
The ultrasonic transducer 5 is inserted into the pin hole 30 formed in the plate 11 and positioned in the rotational direction of the ultrasonic transducer 5 with respect to the cover 7. In this case, the fixing pin 29 projecting forward may be provided on the flange abutting portion 11 and the pin hole 30 may be provided on the flange 10, and the same effect as in the first and second embodiments can be obtained. can get.

FIG. 6 shows a fourth embodiment. Symmetrical parallel cutouts 20a are formed on the outer peripheral surface so that the flange 10 integrally provided on the horn 2 of the ultrasonic transducer 5 is oval. 20a is provided, and parallel protrusions 21a and 21a are provided symmetrically so that the inner peripheral surface of the rotation preventing ring 21 fitted to the outer periphery of the flange 10 becomes an oval shape according to the shape of the flange 10. is there.

With such a configuration, the parallel protrusions 21a, 21a of the detent ring 21 fitted on the flange 10 are
By engaging with 10 parallel notches 20a, 20a, the same effect as in the first to third embodiments can be obtained.

FIG. 7 shows an ultrasonic therapeutic device having a perfusion function.
Inside the ultrasonic transducer 5, a suction hole 4 communicating with the horn 2 and the ultrasonic transmission member 3 is provided, and a suction tube, a suction pump (neither is shown) is used for cutting, emulsifying affected tissue or crushed tissue. It is designed to aspirate bonds. The ultrasonic transmission member 3 has a tapered taper, which is covered with a tapered taper sheath 31. In the gap 32 between the ultrasonic transmission member 3 and the sheath 31, a leak hole 33 communicating with the suction hole 4 is provided at the base end of the ultrasonic transmission member 3 so as to project. The outer surface of the sheath 31 is provided with a water pipe almost parallel to the sheath 31.
34 is attached to the ultrasonic wave transmitting member 3 so that the perfusate can be sent to the vicinity of the tip of the ultrasonic wave transmitting member 3.

According to the ultrasonic therapeutic device configured as described above, the suction hole 4 causes the leak hole 33
The gap 32 communicating with the negative pressure is negative pressure. Therefore, a part of the perfusate sent to the vicinity of the tip of the ultrasonic transmission member 3 by the water supply pipe 34 cleans the treated portion, and the portion of the suction hole 4 opened at the tip of the ultrasonic transmission member 3 from the tip of the suction hole 4. It is sucked and removed together with the excised or emulsified living tissue.
The remaining perfusate is used as it is for the sheath 31 and the ultrasonic wave transmitting member 3.
It is sucked into the gap 32 between the suction hole 4 and the suction hole 4 through the leak hole 33 while cooling the ultrasonic wave transmitting member 3 which is heated by the ultrasonic vibration.

Therefore, it is possible to efficiently cool the ultrasonic transmission member 3 and wash the portion to be processed with a simple configuration.

FIG. 8 is a modified example of FIG. 7, in which the water supply pipe 34 is arranged in the gap 32 between the sheath 31 and the ultrasonic transmission member 3 so that the perfusate is guided to the vicinity of the tip of the ultrasonic transmission member 3. In addition to providing the same effect as described above, by arranging the water supply pipe 34 in the gap 32 between the sheath 31 and the ultrasonic transmission member 3, a protrusion is formed on the outside of the sheath 31. In addition, there is an effect that the operability of surgery can be improved.

FIG. 9 shows an ultrasonic therapeutic device having a suction pressure adjusting function. A rotating ring 35 is fitted on the outer side of the cover 7 so as to be rotatable in the circumferential direction of the cover 7, and the rotating ring 35 is covered. A water supply pipe 34 for supplying a perfusate is connected to the processing section, and a suction pressure adjusting hole 37 having an opening end 36 opening to the atmosphere is provided. The suction pressure adjusting hole 37 communicates with a branch portion 39 of the suction mouthpiece 13 that communicates with the suction hole 4 of the ultrasonic transducer 5 via a suction pressure adjusting tube 38.

According to this embodiment, when the operator uses the finger to close the opening end 36 of the suction pressure adjusting hole 37, the introduction of the atmosphere is eliminated, and the suction pressure of the suction hole 4 can be increased. 36
By reducing the area for closing the space, the atmosphere is introduced from the suction pressure adjusting hole 37, and the suction pressure in the suction hole 4 can be reduced. Further, by providing the water supply pipe 34 and the suction pressure adjusting hole 37 in the rotating ring 35, the position of the water supplying pipe 34 and the suction pressure adjusting hole 37 can be changed by rotating the rotating ring 35 according to the size and preference of the operator's hand. You can At this time, the water pipe 34
Since the suction pressure adjusting tube 38 and the suction pressure adjusting tube 38 integrally rotate on the outside of the cover 7, they are not entangled with each other.

FIG. 10 is a modification of FIG. 9, in which a rod-shaped rotating member 40 is arranged outside the cover 7 along the axial direction of the cover 7 instead of the rotating ring 35, and the tip of the rotating member 40 is The cover 7 is rotatably fitted in the circumferential direction. And
A suction pressure adjusting hole 43 having a water supply hole 41 and an opening end 42 opening to the atmosphere in the axial direction of the rotating member 40, and one end communicates with this suction pressure adjusting hole 43, and the other end sucks the ultrasonic transducer 5. Hole 4
Is formed with a suction pressure adjusting hole 45 that is connected to the branch portion 44 of the suction tube 16 communicating with the.

Therefore, when the operator uses the finger to close the opening end portion 42 of the suction pressure adjusting hole 43, the introduction of the atmosphere is eliminated, the suction pressure of the suction hole 4 can be increased, and the area for closing the opening end portion 42 can be increased. By reducing the pressure, the atmosphere is introduced from the suction pressure adjusting hole 43, and the suction pressure in the suction hole 4 can be reduced. Further, by providing the water supply hole 41 and the suction pressure adjusting hole 43 in the rotating member 40, the position of the water supplying hole 41 and the suction pressure adjusting hole 43 can be changed by rotating the rotating member 40 according to the size and preference of the operator's hand. You can At this time, the water supply hole 41 and the suction pressure adjusting hole 45 integrally rotate on the outer side of the cover 7 and thus do not become entangled with each other.

[Effects of the Invention] As described above, according to the present invention, a flange is provided in the vicinity of a node of ultrasonic vibration in an ultrasonic vibrator, and the flange is provided with an engagement means for positioning the cover in a rotational direction. At the same time, the flange is fixed to the cover through an elastic body provided in front of and behind the flange. Therefore, the central axes of the ultrasonic transducer and the cover are securely fixed without being displaced, and the ultrasonic transducer can be positioned in the rotation direction. Further, it is difficult to transmit the ultrasonic vibration to the cover and the operability is excellent. The ultrasonic treatment device can be provided and the assembling workability can be improved.

[Brief description of drawings]

1 and 2 show a first embodiment of the present invention. FIG. 1 is a side sectional view of an ultrasonic treatment apparatus, FIG. 2 is an exploded perspective view, and FIGS. 3 and 4 show the present invention. FIG. 4 is a side sectional view of an ultrasonic treatment apparatus showing a second embodiment of the present invention, FIG.
FIG. 7 is a side sectional view of part of an ultrasonic therapeutic apparatus showing a third embodiment of the present invention, FIG. 6 is an exploded perspective view of an ultrasonic therapeutic apparatus showing a fourth embodiment of the present invention, and FIG. Is a side sectional view showing an ultrasonic therapeutic device having a perfusion function, FIG. 8 is a partial sectional side view of an ultrasonic therapeutic device showing a modification of FIG. 7, and FIG. 9 is provided with a suction pressure adjusting function. 10 is a side sectional view showing an ultrasonic therapeutic device, FIG.
FIG. 9 is a side sectional view of an ultrasonic therapeutic device showing a modification of FIG.
FIG. 11 is a side sectional view of a conventional ultrasonic therapeutic device. 5 ... Ultrasonic transducer, 7 ... Cover, 10 ... Flange,
11 …… Abutting part, 20 …… notch part, 21 …… stop ring, 22 …… protruding part, 23 …… projecting piece (projecting part), 24 …… engaging concave part (notching part), 25 …… Circular rubber (elastic body), 26 …… Ring rubber (elastic body).

Claims (1)

[Claims] 1. An ultrasonic transducer having an ultrasonic vibrating element section, a horn, an ultrasonic transmission member, and a flange located near a node of ultrasonic vibration and having a notch formed on the outer periphery thereof, and the notch is formed. And has an abutting portion that abuts the flange,
A cover that covers the ultrasonic transducer to form a grip portion,
An ultrasonic therapeutic device including a rotation-stop ring having a protrusion that engages with the notch of the flange and having a protrusion that engages with the notch of the cover, and an elastic body interposed between the flange and the cover. .