JPH0554988B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an ultrasonic surgical handpiece that applies ultrasonic vibration energy from its tip to an affected area to perform surgical operations.

[Prior Art] In surgical fields such as general surgery, neurology, urology, and ophthalmology, ultrasonic surgical instruments that use ultrasonic vibration energy to fragment or emulsify diseased tissue are well known.

In such surgical instruments, ultrasonic vibrations are transmitted to the affected area using a handpiece.

3 and 4 show conventional ultrasonic surgical handpieces, FIG. 3 shows a linear handpiece in which the handpiece outer frame 10 is linearly formed, and FIG. 4 shows a handpiece for ultrasonic surgery. Each of the figures shows a bent type handpiece in which the handpiece outer frame 10 is bent at a predetermined location in order to angle the tip of the piece.

In the figure, the handpiece outer frame 10 includes a handpiece body 11, a holder 12 attached to one end of the handpiece body 11, and a horn cover 14 attached to the tip of the holder 12.
The handpiece main body 11
The connection between the holder 12 and the holder 12 is sealed.

Inside the handpiece body 11, ultrasonic vibrating sections 16 shown in FIGS. 5 and 6 are built.

This ultrasonic vibrator 16 receives a high frequency signal from a high frequency power supply (not shown) and converts this signal into ultrasonic vibration (mechanical vibration) with a vibrator 18. It is comprised of a horn 20 that performs this and a cone 22 that transmits ultrasonic vibrations from the vibrator 18 to the horn 20.

The horn 20 and the cone 22 have the function of amplifying the vibration wave having a weak amplitude on the μm scale from the vibrator 18 to the amplitude necessary for ultrasonic surgery.

The vibrator 18 is composed of an element that converts high frequency current or high frequency voltage into ultrasonic vibration, such as an electrostrictive vibrator or a magnetostrictive vibrator, and includes a cone 22.
And the horn 20 is made of stainless steel, titanium alloy, etc.
It is made of a material that has good transmission of ultrasonic vibrations and is resistant to metal fatigue.

Handpiece outer frame 10 of this ultrasonic vibrating section 16
The horn 20 is loaded so that the tip of the horn 20 protrudes from the horn cover 14 by a predetermined length.

A cable 24 is drawn out linearly from the other end of the handpiece outer frame 11 to the handpiece body 11.

An irrigation pipe 26 is provided on the outer periphery of the horn cover 14, and a cleaning liquid for cleaning the affected area and cooling the horn 20 is supplied from the irrigation pipe 26 to the tip of the horn 20. There is. Further, the horn 20 has a hollow structure, and sucks the crushed object and cleaning liquid from the affected area during surgery through the opening of the horn tip 20. Then, it is disposed of via a suction tube 28 connected to the tail end of the horn 20.

The conventional handpiece is constructed as described above, and the operator of the handpiece grasps the handpiece body 11 and performs surgery by applying the tip of the horn 20 to the affected area.

According to the bending type handpiece shown in FIG.
The second portion is similarly bent by a predetermined angle.
Therefore, the horn 20 projects at a predetermined angle with respect to the axial direction of the handpiece body 11. According to this bendable handpiece, the operator can rotate the handpiece to
Ultrasonic waves can be easily transmitted in various directions,
It also expands the field of view of the surgical site during surgery, makes it easier to see the target point, and improves operability. Incidentally, the present applicant has filed a utility model registration application (Utility Model Application No. 107142/1982) on July 17, 1980 regarding the bendable handpiece.

[Problems to be Solved by the Invention] In the conventional handpiece described above, the cable 24 drawn out from the tail end of the handpiece body 11 has a transducer 18 as shown in the cross-sectional view of the cable in FIG. A conductive wire 30 for transmitting high frequency signals is passed through the handpiece body 1.
In order to cool the ultrasonic vibrating section 16 in the handpiece body 1, a supply tube 32 and a discharge tube 34 for supplying and discharging cooling water are passed through the handpiece body 11. This cable 24 has a diameter of about 1 cm and is also heavy.

As a result, when performing surgery deep within the body, the handpiece must be used in an almost vertical position.
Depending on the weight of the cable 24, the handpiece body 1
An excessive tensile force is applied to the tail end of 1 due to the load of the cable.

Further, even when using a bending type handpiece, the handpiece can be tilted by the bending angle, so the tension force due to the load on the cable 24 can be reduced by that amount; There was a problem in that the tensile force of 24 made it difficult to operate during surgery and hindered proper surgery.

Purpose of the Invention The present invention has been made in view of the above problems, and its purpose is to effectively reduce the tensile force due to the cable load applied to the tail end of the handpiece during surgery, and to An object of the present invention is to provide a handpiece for an ultrasonic surgical instrument that improves operability.

[Means for Solving the Problems] In order to achieve the above object, the ultrasonic surgical handpiece according to claim 1 includes a single-tubular handpiece main body, a part of which becomes a fulcrum when grasping, and a handpiece main body. a handpiece outer frame consisting of a holder and a horn cover; an ultrasonic vibrator housed within the handpiece outer frame; and a handpiece outer frame with one end protruding from the distal end side to transmit vibrations of the ultrasonic vibrator. an amplitude expander that amplifies resonance and applies it to the surgical site from the one end; a cable that supplies power to the ultrasonic transducer and supplies and discharges cooling water; and a cable that is provided at the tail end of the handpiece outer frame. The handpiece is characterized in that it includes a bending part for pulling out the cable at a predetermined angle with respect to the axial direction of the handpiece.

The ultrasonic surgical handpiece according to claim 2 is the ultrasonic surgical handpiece according to claim 1, wherein the handpiece outer frame and the amplitude expander are bent at an antinode position of a resonant vibration wave. Features.

[Function] According to the configuration described in claim 1, the bending portion is provided at the tail end of the handpiece body and the cable pullout is angled at a predetermined angle with respect to the axial direction of the handpiece, so that during surgery, Particularly when performing surgery deep within a living body, even when the handpiece is erected in an almost vertical direction, the moment of force applied to the handpiece body due to the cable load is reduced by the angle. I can do it.
This reduces the tensile force applied to the handpiece body and improves operability during surgery.

Furthermore, according to the configuration described in claim 2, the handpiece is bent at the antinode position of the resonant vibration wave in addition to the bending portion at the tail end of the handpiece body, so that vibrations to the horn 20 are reduced. With almost no amplitude attenuation and the provision of two bent parts, it is possible to more easily apply the tip of the horn 20 vertically to the affected area, improving operability. There is.

[Embodiments] Hereinafter, preferred embodiments of the ultrasonic surgical handpiece according to the present invention will be described based on the drawings.

Figures 1 and 2 are side views showing the entire handpiece; Figure 1 is a linear handpiece;
The figures each show a bendable handpiece. In the figure, the same elements as in FIGS. 3 and 4 are given the same reference numerals, and the explanation thereof will be omitted.

A characteristic feature of the present invention is that a bent portion is provided at the tail end of the handpiece body 11,
In this embodiment, a bent portion 36 is provided at the joint between the handpiece body 11 and the cable 24.

This bent portion 36 has a bent connector 36a in the center.
A handpiece body connecting portion 36b and a cable connecting portion 36c are formed at both ends thereof, respectively.

Since the bent part 36 is formed at the tail end of the handpiece main body 11 and the cable 24 is pulled out from this bent part 36, the cable 24 is bent at the bending angle of the bent part 36 (main direction) with respect to the axial direction of the handpiece. In the embodiment, it is pulled out at an angle of approximately 40 degrees. This angled drawing of the cable 24 makes it easier to operate the handpiece than when the tail end of the handpiece body 11 is formed straight without forming a bent part and the cable 24 is drawn out from there. The moment of force applied by the load on the cable 24 can be reduced.

That is, when the part of the handpiece body 11 held by the operator is used as a fulcrum, the distance from this fulcrum to the point where the load of the cable 24 is applied can be shortened, thereby reducing the moment of force. It is something.

Therefore, the pulling force applied to the cable 24 on the handpiece when operating the handpiece in a substantially vertical direction during surgery on deep parts of the living body can be significantly reduced.

In the case of the bending type handpiece shown in FIG. 2, the bending of the bending portion 36 and the bending of the handpiece outer frame, in this example, the bending of the bending portion 38 of the holder 12 portion, are on the same plane. It is said to be bent.

The position where the bent portion 38 is formed is set at the antinode position of the vibration wave of the handpiece. That is, as shown in the bending type handpiece and its amplitude characteristic curve in FIG. 8, the handpiece is bent at a point A that stays at a point A1, which is the antinode of the vibration wave. By bending the resonant vibration wave at the antinode position in this way, it is possible to almost suppress the attenuation of the vibration wave amplitude caused by bending the handpiece.

In this way, by forming a bent type handpiece in which the handpiece outer frame is bent at a predetermined location, and further combining the bent portion 36 at the tail end of the handpiece, which is a feature of the present invention, the handpiece The angle given to the joint between the main body 11 and the holder 12 is combined, and the operability of the handpiece is further improved.

That is, the handpiece body 11 and the holder 12
When the distal end of the horn 20 is applied vertically to the affected area, the handpiece main body 11 can be tilted by the bending angle, and the bending part 36 allows the cable to be bent. Since the pulling force exerted by the handpiece body 11 is reduced, the force applied to the tail end of the handpiece body 11 is doubly reduced.

Note that in this embodiment, the handpiece body 1
Form the bent part of the tail end of handpiece body 1.
Although this is done by attaching the bending part 36, which is a separate member from 1, it is not limited to this; for example, it can also be formed by bending the tail end of the handpiece body 11 itself at a predetermined angle. It is.

[Effects of the Invention] As explained above, according to the handpiece for an ultrasonic surgical instrument according to the present invention, a bent portion is formed at the tail end of the handpiece body, and the cable is angled at a predetermined angle with respect to the handpiece. By pulling it out, it is possible to reduce the pulling force due to the cable load applied to the tail end of the handpiece body during handpiece operation, and improve the operability of the handpiece during surgery. I can do it.

Further, by forming a bent portion at the tail end of the bent handpiece, the operability of the handpiece can be further improved by combining the two bent portions.

[Brief explanation of the drawing]

Fig. 1 is a side view showing an embodiment of a linear hand piece according to the present invention, Fig. 2 is a side view showing an embodiment of a bent hand piece according to the invention, and Fig. 3 is a side view showing an embodiment of a linear hand piece according to the present invention. Fig. 4 is a side view of a conventional bending type handpiece, Fig. 5 is a side view of an ultrasonic vibrating section built into a linear handpiece, and Fig. 6 is a side view of an ultrasonic vibrating section built into a bending type handpiece. FIG. 7 is a side view of the ultrasonic vibrating section, FIG. 7 is a sectional view of the cable of the handpiece, and FIG. 8 is an explanatory diagram for explaining the bending position of the bendable handpiece. DESCRIPTION OF SYMBOLS 1...Handpiece outer frame, 11...Handpiece body, 16...Ultrasonic vibration part, 20...Horn, 24...Cable, 36...Bending part.

Claims (1)

[Scope of Claims] 1. A single-tubular handpiece main body, a part of which serves as a fulcrum during gripping, a handpiece outer frame consisting of the handpiece main body, a holder, and a horn cover, and a handpiece outer frame that is housed within the handpiece outer frame. an amplitude expander having one end protruding from the distal end side of the handpiece outer frame and resonantly amplifying the vibration of the ultrasonic vibrator and applying it to the surgical site from the one end; A cable for supplying electric power and supplying/discharging cooling water, and a bent portion provided at the tail end of the handpiece outer frame, the cable being angled at a predetermined angle with respect to the axial direction of the handpiece. A handpiece for ultrasonic surgery, comprising: a bending portion for pulling out the handpiece. 2. The ultrasonic surgical handpiece according to claim 1, wherein the handpiece outer frame and the amplitude expander are bent at an antinode position of a resonant vibration wave.