JP2003038513A - Ultrasonic operating instrument - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an ultrasonic operating instrument having simple constitution and capable of stably and certainly fixing an ultrasonic vibration generation source to a casing. SOLUTION: The ultrasonic operating instrument has the casing 10, the ultrasonic vibration generation source (ultrasonic vibrator) 30 housed in the casing 10 to generate ultrasonic vibration and support members 40 and 41 for supporting the ultrasonic vibration generation source 30 on the casing 10. The casing 10 has a main body 11, the leading end member 12 provided to the main body 11 and a fixing member 13 for fixing the leading end member 12 to the main body 11 in a non-rotatable manner. The second locking surface 14 provided to the leading end member 12 is locked with the first locking surface 35 provided to the ultrasonic vibration generation source 30. The rotation of the ultrasonic vibration generation source 30 with respect to the casing 10 is prevented by the locking of the first and second locking surfaces.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ultrasonic surgical apparatus for crushing tissue at a surgical site of a patient using ultrasonic waves.

[0002]

2. Description of the Related Art Conventionally, there has been used a surgical device for incising and crushing living tissue by utilizing ultrasonic vibration.
The handpiece of this type of surgical apparatus generally includes an ultrasonic vibrator that is an ultrasonic vibration source, an ultrasonic vibrator that is a horn that transmits ultrasonic vibrations from the ultrasonic vibrator to the surgical site, and an ultrasonic vibrator. It is composed of a casing or the like that covers the outer circumference of the sound wave oscillator.

The ultrasonic oscillator is composed of a vibrating element, electrode plates, and metal blocks located on both sides of the vibrating element, and has a function of converting an electric signal from an amplifier into ultrasonic vibration. .

Further, the horn has a function as a surgical instrument that amplifies ultrasonic vibrations from the ultrasonic transducer and transmits the amplified ultrasonic vibrations to the surgical site, and crushes and dissects the surgical site at its distal end. Also, the horn is available in various shapes,
It can be used according to the purpose of surgery. Therefore, the horn is detachably attached to the ultrasonic transducer by screwing or the like.

The horn is attached and detached when the ultrasonic transducer is housed in the casing. Here, when the ultrasonic transducer is configured to be rotatable with respect to the casing, when the horn is screwed onto the ultrasonic transducer and tightened,
The ultrasonic transducer rotates inside the casing, which interferes with the attachment / detachment of the horn. Therefore, in the conventional ultrasonic operation device, in order to non-rotatably attach the ultrasonic transducer to the casing, the following structure using the flange portion is used.

The flange portion is formed of a resin material into a flange shape having an outer diameter larger than that of the ultrasonic oscillator. The ultrasonic transducer is integrally attached to the center hole of the flange portion, and the outer peripheral portion of the flange portion is integrally fixed to the casing.

As described above, in the structure of the conventional ultrasonic surgical apparatus, the ultrasonic vibrator is fixed to the casing via the flange portion to prevent the ultrasonic vibrator from rotating with respect to the casing.

[0008]

In the ultrasonic surgical apparatus, there is a strong demand for downsizing of the casing grasped by the operator, particularly for reducing the outer diameter of the casing, in order to improve the operability during surgery.

However, as described above, the structure of the conventional ultrasonic surgical device has a structure in which the flange-shaped flange portion having a larger outer diameter than the ultrasonic transducer is fixed to the casing, so that the flange portion is accommodated. Since the outer diameter of the casing is larger than the outer diameter of the flange portion, it is difficult to reduce the outer diameter of the casing.

SUMMARY OF THE INVENTION In view of the above problems, it is an object of the present invention to provide a surgical apparatus capable of stably and reliably fixing an ultrasonic vibration source to a casing with a simple structure.

[0011]

Such an object is achieved by the present invention of the following (1) to (9).

(1) An ultrasonic operation comprising a casing, an ultrasonic vibration source housed in the casing for generating ultrasonic vibration, and at least one support member for supporting the ultrasonic vibration source on the casing. In the apparatus, the casing includes a main body, a tip member located on a tip side of the main body, and a fixing member that fixes the tip member to the main body in a non-rotatable manner. .

(2) A first locking surface is provided on the main body, and a second locking surface that engages with the first locking surface is provided on the tip member, and the first locking surface is provided. The ultrasonic surgical apparatus according to (1) above, wherein rotation of the tip member with respect to the main body is restricted by engagement between a surface and the second locking surface.

(3) The ultrasonic surgical apparatus according to (1) or (2), wherein the tip member is fixed to the main body by screwing the main body and the fixing member.

(4) The ultrasonic surgical apparatus according to (3), wherein the main body has a mounting portion formed of a pair of curved pieces, and the fixing member is fixed to the mounting portion.

(5) The tip member engages with a first engaging surface provided on the ultrasonic vibration generating source, and prevents the ultrasonic vibration generating source from rotating with respect to the casing.
The ultrasonic surgical apparatus according to any one of (1) to (4) above, which has an engaging surface.

(6) The ultrasonic operation apparatus according to (5), wherein the first engagement surface is provided by cutting out an outer peripheral surface of the ultrasonic vibration source.

(7) The ultrasonic surgical apparatus according to any one of (1) to (6), wherein the tip member is made of a material different from that of the main body.

(8) The ultrasonic surgical apparatus according to (7), wherein the tip member is made of a metal material, and the main body is made of a resin material.

(9) The ultrasonic surgical apparatus according to (8), wherein the fixing member is made of a metal material.

Other objects, functions and effects of the present invention will become more apparent from the following description of embodiments with reference to the drawings.

[0022]

BEST MODE FOR CARRYING OUT THE INVENTION An ultrasonic surgical apparatus according to the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a sectional view showing the overall construction of the ultrasonic surgical apparatus of the present invention. FIG. 2 is an exploded perspective view of the ultrasonic surgical apparatus of the present invention. FIG. 3 is an exploded perspective view of a casing according to the ultrasonic surgical apparatus of the present invention. FIG. 4 is a front view of a casing according to the ultrasonic surgical device of the present invention.

The ultrasonic surgical apparatus of the present invention is an ultrasonic surgical apparatus for incising and crushing a living tissue by utilizing ultrasonic vibration. As shown in FIGS. 1 and 2, a casing 10 is provided. An ultrasonic vibration generation source (ultrasonic vibrator) 30 that is housed in the casing 10 and generates ultrasonic vibration, and support members 40 and 41 that support the ultrasonic vibration generation source 30 and are attached to the casing 10 are provided. is doing.

The ultrasonic vibration generating source 30 is, for example, a bolt tightening type ultrasonic vibrator, and includes a plurality of piezoelectric elements 36, electrode plates (not shown) provided between the piezoelectric elements, and these with a predetermined pressure. It is composed of a front end side metal block 31, a base end side metal block 32, etc. The ultrasonic vibration generation source 30 has a function of converting an electric signal from an amplifier (not shown) into ultrasonic mechanical vibration.

At the tip of the ultrasonic vibration generating source 30,
A jig such as the horn 33 is attached. This horn 3
Various shapes are prepared for 3 and are selectively used according to the type of surgery. Therefore, the base end portion of the horn 33 is attached to the tip end side metal block 31 of the ultrasonic vibration generation source 30 via the screwing portion 34 that is detachably screwed into the tip end portion of the ultrasonic vibration generation source 30. . Further, the horn 33 is provided with a suction hole 38 which penetrates from the distal end to the proximal end and serves as a flow path through which liquids and particles near the surgical site pass during surgery. The suction hole 38 communicates with a suction hole 37 provided in the ultrasonic vibration generation source 30 and a suction hole 59 of a rear end member 50 described later, and is connected to a suction means such as a pump (not shown).

The tip end side metal block 31 of the ultrasonic vibration source 30 has a tip end member 1 of a casing 10 to be described later.
A pair of first engagement surfaces 35 that engage the second engagement surfaces 14 of the two;
35 are provided.

As shown in FIG. 2, the first engaging surfaces 35, 35 are provided by cutting out the outer peripheral surface of the tip side metal block 31, and each of them is substantially flat. The first engagement surface 35 is provided at a position that engages with a second engagement surface 14 of the tip member 12 described later when the ultrasonic vibration generation source 30 is inserted into the casing 10. . The engagement of the first and second engagement surfaces 35 and 14 prevents the ultrasonic vibration source 30 from rotating with respect to the casing 10.

The ultrasonic vibration generating source 30 is attached to the casing 10 via support members 40 and 41. This configuration will be described later in detail.

As shown in FIG. 3, the casing 10 includes a main body 11 and a tip member 1 located on the tip side of the main body 11.
2, a fixing member 13, a horn cover 25, and a rear end member 50 that covers the rear end opening of the main body 11 and the like.

The main body 11 is made of a resin material and is formed into a substantially cylindrical shape. As shown in FIG. 3, the main body 11 has mounting portions 15 and 15 formed on the tip side thereof, which are formed by a pair of roof-shaped curved pieces. is doing. Each of the mounting portions 15 and 15 has a thread groove 16 on its inner peripheral surface, which is screwed with a screw thread 21 of the fixing member 13 described later to fix the fixing member 13 to the body 11.

Further, on both side surfaces of each mounting portion 15, 15,
A substantially flat first locking surface 17 is provided. The first locking surface 17 corresponds to the substantially flat second locking surface 19 formed on the inner peripheral surface of the central hole 18 of the tip member 12 when the tip member 12 is attached to the attachment portion 15. It is provided at the position where

The first locking surface 17 engages with the second locking surface 19 when the tip member 12 is inserted into the mounting portion 15. And thereby, the tip member 12 with respect to the main body 11
Is prevented from rotating.

The tip member 12 is made of a metal material, and as shown in FIG. 4, a central hole 18 having a substantially oval cross section.
have. On the inner wall surface of the center hole 18, when the tip member 12 is inserted into the mounting portion 15, a pair of substantially flat second pair engaging with the first locking surface 17 provided on the mounting portion 15. A locking surface 19 (see FIG. 3) is provided.

In the present embodiment, the first,
A pair of the second locking surfaces 17 and 19 is provided, but the present invention is not limited to this embodiment, and the first and second locking surfaces 1 are provided.
It is possible to provide one or three or more seven and nineteen. Even in such a configuration, rotation of the main body 11 and the tip member 12 can be prevented as in the present embodiment. . Further, in the present embodiment, the first and second locking surfaces 17 and 19 are configured by one flat surface, but the present invention is not limited to this embodiment, and may be configured by a plurality of flat surfaces or curved surfaces. Is.

Further, the tip member 12 has a function of preventing the ultrasonic vibration generating source 30 from rotating with respect to the casing 10. That is, as shown in FIGS. 3 and 4, the tip member 12 engages with the first engaging surface 35 provided on the ultrasonic vibration generating source 30, and the tip member 12 is superposed on the tip member 12 (the casing 10). It has a second engagement surface 14 that prevents the sound wave vibration source 30 from rotating.

In the present embodiment, the contact surface between the casing 10 and the ultrasonic vibration source 30 is made of metal by forming a part of the casing 10 with the metallic tip member 12. Therefore, when the ultrasonic vibration generation source 30 is ultrasonically vibrated, the contact surface is less likely to be worn and an abnormal noise is less likely to be generated.

In this embodiment, the first and second
Although one pair of the engagement surfaces 35 and 14 is provided, the present invention is not limited to this embodiment, and one or three or more may be provided like the first and second engagement surfaces 17 and 19. is there.

As shown in FIG. 3, the fixing member 13 has a thread 2 that engages with a thread groove 16 provided in the mounting portion 15.
1 and a flange-shaped end face 24 having a groove 23 into which a tool such as a screwdriver is inserted when tightening the screw 22. The tip member 12 is sandwiched between the end surface of the main body 11 and the end surface portion 24 of the fixing member 13 when the fixing member 13 is screwed into the mounting portion 15,
Fixed. A metal material such as stainless steel is preferably used as the material forming the fixing member 13,
A resin material or the like may be used.

The horn cover 25 is made of a resin material and is attached to the tip member 12 as shown in FIGS. The horn cover 25 is provided with a mounting portion 26 to which a water supply pipe (not shown) for supplying cleaning water is attached to the tip of the horn 33.

The rear end member 50, as shown in FIGS. 1 to 3, has a first member 51 located on the front end side, a second member 52 located on the rear end side, and the first member 51. And an elastic member 53 sandwiched by the second member 52,
And a screw 54 for fixing the first member 51 and the second member 52. The second member 52 is provided with a mounting portion 60 to which the water pipe (not shown) is fixed. The water pipe is fixed to the mounting portion 60 of the horn cover 25 by the mounting portion 60 and the mounting portion 26 of the horn cover 25.
1 is arranged along the side surface.

As shown in FIGS. 1 and 3, the first member 51 includes a suction tube 55, a connecting portion 56 located on the front end side of the suction tube 55, and a rear side piece 57 located on the rear end side. Connection part 5
6 and a front side piece 58 located between the rear side piece 57. Note that these members are integrally formed of a resin material.

The connecting portion 56 is provided at the tip of the suction tube 55. The connecting portion 56 has the support member 4 therein.
1 is accommodated and the rear end of the ultrasonic vibration generating source 30 is supported via a support member 41.

The supporting members 40 and 41 are formed by forming a ring-shaped elastic material such as various rubber materials typified by silicone rubber or thermoplastic elastomer, and as shown in FIGS. The vibration source 30 is provided on the front end side and the rear end side. The support member 40 located on the front end side of the ultrasonic vibration generation source 30 engages with the front end portion of the main body 11, and the support member 41 located on the rear end side of the ultrasonic vibration generation source 30 is a rear end member. Engage with the connecting portion 56 of 50.

These supporting members 40 and 41 have a function of supporting the ultrasonic vibration generating source 30 and attaching it to the casing 10, and a sealing function of preventing water from entering the inside of the casing 10 during use. That is, the support member 40 is configured to support the tip portion of the ultrasonic vibration generation source 30 and also function as a seal that prevents water from entering from the tip side of the main body 11. Also, the support member 4
1 supports the rear end portion of the ultrasonic vibration generating source 30, and the suction hole 37 of the ultrasonic vibration generating source 30 and the rear end member 50.
It is also configured to function as a seal that prevents water from entering from the connection portion with the suction hole 57.

Hereinafter, with respect to the main body 11, the front end member 12, the fixing member 13, the ultrasonic vibration generating source 30, and the rear end member 50.
The procedure for attaching the will be described.

(1) Insert the tip member 12 into the main body 11. More specifically, the mounting portion 15 of the main body 11 is inserted into the central hole 18 of the tip member 12. At this time, the curved surface of the central hole 18 of the tip member 12 and the mounting portion 1
The outer peripheral surfaces of 5, 5 are engaged with each other, and the first engaging surface 17 and the second engaging surface 19 are engaged with each other. And, thereby, the rotation of the tip member 12 with respect to the main body 11 is prevented.

(2) The thread 21 of the thread portion 22 of the fixing member 13 is screwed into the thread groove 16 of the mounting portion 15 and tightened. At this time, the tip member 12 is sandwiched between the fixing member 13 and the body 11, and the tip member 12 is fixed to the body 11.

(3) The supporting member 4 is attached to the ultrasonic vibration source 30.
0 and 41 are attached and the main body 11 is inserted from the rear end side opening. At this time, the ultrasonic vibration generation source 30 is supported by the support member 40 attached to the tip end side thereof and the tip end portion of the main body 11.

(4) Insert the rear end member 50 through the opening on the rear end side of the main body 11, and tighten the screw 54 to tighten the main body 11
Fixed to. At this time, the support member 41 provided on the rear end side of the ultrasonic vibration generation source 30 is supported by the first member 51, whereby the front end portion and the rear end portion of the ultrasonic vibration generation source 30 are attached to the casing 10. Both sides are supported.

The effects of the ultrasonic surgical operation apparatus according to this embodiment will be described below. In the present embodiment, the ultrasonic vibration generation source 30 is supported by the casing 10 only by the support members 40 and 41. Also, the casing 10
The rotation of the ultrasonic vibration source 30 with respect to
0 and 41, which are provided separately from the first locking surface 17 and the second
This is prevented by the engagement of the locking surface 19 and the fixing of the tip member 12 by fastening the screw groove 16 and the screw thread 21. Also,
Support member 40 located on the tip side of ultrasonic vibration source 30
Are provided at positions of nodes of vibration when the ultrasonic vibration source 30 is ultrasonically vibrated.

By using such a structure, the ultrasonic surgical operation apparatus 1 according to the present embodiment has the casing 10 without using the flange portion in the ultrasonic surgical operation apparatus having the conventional structure.
The ultrasonic vibration generating source 30 can be supported and prevented from rotating. Therefore, the ultrasonic vibration generation source 30 can be stably supported without increasing the outer diameter of the casing 10.

Further, the ultrasonic surgical operation apparatus 1 of the present invention has a structure in which the front end portion and the rear end portion of the ultrasonic vibration generating source 30 are both-supported by the supporting members 40 and 41 made of an elastic material. Therefore, rattling and abnormal noise are less likely to occur when the ultrasonic vibration source 30 is driven.

Finally, it is needless to say that the present invention is not limited to the above-mentioned embodiments, and various modifications and improvements can be made within the scope of the claims.

For example, the horn of this embodiment may be provided with a high-frequency current supply means for supplying a high-frequency current. In such a configuration, the device is incised or coagulated by using the high-frequency current. It is possible to add a function as an electrosurgical device for performing the above treatment.

[0056]

As described above, according to the present invention, the ultrasonic vibration source can be stably and reliably fixed to the casing with a simple structure.

Further, by selecting the material of the tip member of the casing according to the ultrasonic operating apparatus of the present invention, it is possible to prevent the contact surface of the tip member from being worn and the abnormal noise from being generated when the ultrasonic vibration source vibrates. can do. When the ultrasonic vibration source according to the ultrasonic surgical apparatus of the present invention has a structure in which it is supported by the casing only by a ring-shaped supporting member, the casing does not have a flange portion used in the conventional structure. On the other hand, the ultrasonic vibration generation source can be stably supported, and the outer diameter of the casing can be reduced with a simple configuration.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing the overall configuration of an ultrasonic surgical apparatus of the present invention.

FIG. 2 is an exploded perspective view of the ultrasonic surgical apparatus of the present invention.

FIG. 3 is an exploded perspective view of a casing according to the ultrasonic surgical device of the present invention.

FIG. 4 is a front view of a casing according to the ultrasonic surgical apparatus of the present invention.

[Explanation of symbols]

1 Ultrasonic surgery device 10 casing 11 body 12 Tip member 13 Fixed member 14 Second engagement surface 15 Mounting part 16 screw groove 17 First locking surface 18 center hole 19 Second locking surface 21 screw thread 22 screw part 23 Groove 24 End face 25 horn cover 26 Mounting part 30 Ultrasonic vibration source 31 Tip side metal block 32 Base side metal block 33 horn 34 Threaded part 35 First engagement surface 36 Piezoelectric element 37 Suction hole 38 Suction hole 40, 41 support member 50 Rear end member 51 First Member 52 Second member 53 Elastic member 54 screws 55 Suction tube 56 Connection 57 Rear piece 58 Front piece 59 Suction hole 60 Mounting part

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Shigeru Hanaoka             6-22-1, Mure, Mitaka City, Tokyo Aloka             Within the corporation (72) Inventor Gen Ogura             6-22-1, Mure, Mitaka City, Tokyo Aloka             Within the corporation (72) Inventor Hidenori Kato             6-22-1, Mure, Mitaka City, Tokyo Aloka             Within the corporation F-term (reference) 4C060 EE03 JJ11 MM24

Claims (9)

[Claims] 1. A casing, an ultrasonic vibration source housed in the casing to generate ultrasonic vibration, and at least one supporting the ultrasonic vibration source in the casing.
In the ultrasonic surgical apparatus having one support member, the casing has a main body, a tip member located on the tip side of the body, and a fixing member that non-rotatably fixes the tip member to the body. An ultrasonic surgical device. 2. The first main body is provided with a first locking surface,
The tip member is provided with a second locking surface that engages with the first locking surface, and the engagement of the first locking surface and the second locking surface causes the tip member to move with respect to the main body. The ultrasonic surgical device according to claim 1, wherein rotation is restricted. 3. The tip member is fixed to the main body by screwing the main body and the fixing member together.
Alternatively, the ultrasonic surgical device described in 2. 4. The ultrasonic surgical apparatus according to claim 3, wherein the main body has a mounting portion composed of a pair of curved pieces, and the fixing member is fixed to the mounting portion. 5. The tip member has a second engagement surface that engages with a first engagement surface provided on the ultrasonic vibration source to prevent rotation of the ultrasonic vibration source with respect to the casing. The ultrasonic surgical device according to any one of claims 1 to 4, which comprises. 6. The ultrasonic surgical apparatus according to claim 5, wherein the first engagement surface is provided by cutting out an outer peripheral surface of the ultrasonic vibration generating source. 7. The ultrasonic surgical apparatus according to claim 1, wherein the tip member is made of a material different from that of the main body. 8. The tip member is made of a metal material, and the body is made of a resin material.
The ultrasonic surgical device according to. 9. The ultrasonic surgical apparatus according to claim 8, wherein the fixing member is made of a metal material.