JP3115878B2 - Ultrasound surgical handpiece - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an ultrasonic surgical handpiece for performing an operation using ultrasonic vibration.

[Prior art] Conventionally known as this kind of ultrasonic surgical handpiece, an ultrasonic transducer and a vibration amplification horn are arranged in a cover body, and the horn is screwed to the horn. The vibration transmitting members are fixedly connected by the fixing means. The ultrasonic vibrator is driven while the tip of the vibration transmitting member is in contact with a treatment target such as a living tissue or a calculus, and the generated ultrasonic vibration is sequentially transmitted to the living body through the vibration amplification horn and the vibration transmitting member. It is given to a treatment target such as a tissue or a calculus, and a treatment such as excision or crushing is performed by the vibration energy.

The vibration transmitting member is formed of a straight cylindrical body. For this reason, the tip shape of the vibration transmitting member is a cylinder.

However, there has been known a vibration transmitting member in which a distal end portion is formed in a blade shape for the purpose of improving treatment efficiency and the like (see, for example, US Pat. No. 3,990,452). This handpiece will have directionality in use.

In recent years, handpieces whose main purpose is hemostasis have been provided with an operation portion such as a hand switch on the outer surface of the cover of the handpiece in order to use a high frequency treatment. Further, there has been proposed an arrangement in which a water pipe is provided in a cover of a handpiece (see PCT WO89 / 02725).

These handpieces are formed as irregular shapes in use. The ultrasonic vibrator and the vibration amplification horn in these are fixed inside a cover on which they are disposed. That is, relative rotation between the ultrasonic vibrator and the vibration amplifying horn and the cover is prevented. Further, the rotation of the vibration transmitting member fixed to the horn relative to the cover portion is also prevented.

In the case where the direction in which the handpiece is used in an irregular shape is specified, the direction in which the vibration transmitting member is fixed to the horn is also limited.

Then, it is necessary to firmly and integrally fix the vibration transmitting member to the horn. As a means for this, a method of fastening with a screw has been adopted.

[Problems to be Solved by the Invention] As described above, since the vibration transmitting member is fastened to the horn with the screw, the fixing position of the vibration transmitting member to the horn is likely to vary.

In the case where the gripping portion of the handpiece is formed in an irregular shape and the vibration transmitting member has a shape in which the direction of use is specified, for example, the distal end portion of the vibration transmitting member is bent or the distal end portion of the vibration transmitting member is bent. In the case where a deformed portion such as a blade is formed on the blade, it is difficult to determine the positional relationship between the grip portion and the vibration transmitting member. For this reason, the orientation in use is likely to be out of order.

If the relative position between the gripping portion of the handpiece and the vibration transmitting member deviates from the original positional relationship in this way, there is a possibility that the use of the handpiece by gripping the handpiece may become extremely poor in use.

This is because, for example, when a vibration transmitting member or the like having a blade shape at the tip is used, the direction in which the tip is applied to a treatment site such as a living tissue is limited, and the surgeon grasps the tip to maintain the orientation. The position to be used is also limited, so that the user can use the camera while it is difficult to grip.

In particular, in a handpiece provided with a hand switch for turning on / off a treatment by high frequency, the gripping position is important, and it is necessary to accurately set the positional relationship between the gripping portion of the handpiece and the vibration transmitting member.

Furthermore, in this type of handpiece, the gripping position and the like may be selected according to the operator's preference, but in the conventional handpiece, the gripping position and the direction of the vibration transmitting member cannot be freely selected according to the operator's preference.

The present invention has been made in view of the above problems, and its object is to freely select the direction in which the handpiece is gripped and the direction of the treatment vibration transmission member to suit the surgeon's preference. It is an object of the present invention to provide an ultrasonic surgical handpiece that can be used in an orientation.

[Means for Solving the Problems] In order to achieve the above object, an ultrasonic surgical handpiece of the present invention provides an ultrasonic vibration handpiece with respect to a gripping outer cover in which an ultrasonic vibration generator is installed. A holding means for rotatably holding the ultrasonic vibration transmitting member for treatment connected to the generator is provided.

[Operation] Since the holding means for holding the ultrasonic vibration generating unit connected to the treatment ultrasonic vibration transmission member is provided rotatably with respect to the exterior cover, the positional relationship between the treatment ultrasonic vibration transmission member and the exterior cover is provided. Can be freely selected and used. For this reason, for example, the direction of the treatment vibration transmitting member having directionality with respect to the grip portion of the odd-shaped handpiece can be rotated and positioned to an arbitrary direction desired by the operator. Also,
Even if the fixed position of the vibration transmitting member with respect to the horn is varied, such as when the vibration transmitting member is fastened to the horn on the ultrasonic generating unit side with a screw, the vibration transmitting member can be adjusted in a direction that is easy to use. Therefore, the operability is improved, and a safe, appropriate and accurate fine operation can be performed.

Embodiment FIG. 1 and FIG. 2 show a first embodiment of the present invention.

In FIG. 1, reference numeral 1 denotes a handpiece for the ultrasonic operation, and this handpiece 1 has a Langevin type ultrasonic vibrator 3 as an ultrasonic vibration generating section inside an outer cover 2 also serving as a gripping portion. Has been installed. A horn 4 for amplifying the vibration amplitude is integrally connected and fixed to the front end of the ultrasonic transducer 3. The Langevin type vibrator 3 is configured such that the piezoelectric element 5 and the electrode plate 6 are overlapped, and these are sandwiched and fastened between the horn 4 and the rear metal block 7 to integrally connect them. . Horn 4
Is integrally formed with a flange portion 8 at the periphery.

The Langevin type ultrasonic vibrator 3 is positioned and held in a cylindrical interior cover 12 as a holding frame constituting a holding means. The horn 4 is fixed to the front end of the interior cover 12 using a flange 8 provided near a node of the vibration. That is, a flange portion 14 protruding inward is formed at the front end of the interior cover 12, and the flange portion 8 on the horn 4 side is applied to the flange portion 14, and a fastening ring screwed into the front end of the interior cover 12. It is designed to hold down with 15 and tighten and fix.
In this manner, the Langevin type ultrasonic transducer 3 is positioned and held fixedly in the cylindrical interior cover 12, and is integrally formed.

A suction pipe 16 is provided at the rear end of the ultrasonic vibrator 3, and the suction pipe 16 is liquid-tightly connected to a base 17 provided on a rear end closing wall 13 of the interior cover 12. The suction tube 16 forms a passage (not shown) extending through the ultrasonic vibrator 3 and the horn 4. A suction tube (not shown) is connected to the base 17.

In this way, the Langevin type ultrasonic transducer 3 is positioned and fixed in the cylindrical interior cover 12.

The interior cover 12 holding the ultrasonic vibrator 3 is rotatably fitted into a circular inner hole 11 formed inside the exterior cover 2. Further, O-rings 18 and 19 are interposed between the inner periphery of the inner hole 11 in the outer cover 2 and the outer periphery of the inner cover 12 at two locations before and after the inner periphery. The O-rings 18 and 19 are the outer cover 2 and the inner cover 12
And a frictional resistance is generated between them to prevent normal relative rotation.

An inner cover is provided on the electrode plate 6 of the ultrasonic vibrator 3.
The lead wire 22 from the electrode cord 21 penetrating through the rear end closing wall 13 of the 12 is connected.

Also, as shown in FIG. 1, the upper wall portion of the exterior cover 2 is swelled upward as shown in FIG. 2, and a water supply passage 23 is provided at the swelling portion. For this reason, as shown in FIG. 2, the exterior cover 2 is formed in an irregular shape in which the upper wall portion swells. Then, a grip portion 24 is formed by the outer periphery of the outer cover 2 having this irregular outer shape.

One end of the water supply channel 23 communicates with the outside through the front end opening 25 of the exterior cover 2, and the other end is a base provided on the rear end wall of the exterior cover 2.
Connected to 26. A water supply tube (not shown) is connected to the base 26.

On the other hand, a treatment ultrasonic vibration transmission member 27 is connected to the tip of the horn 4. As this connecting means, a screw portion provided at the base end portion of the ultrasonic vibration transmitting member 27 is screwed into the distal end of the horn 4 to be fixedly connected.

The distal end portion of the ultrasonic vibration transmitting member 27 is formed with a deformed treatment section 29 having a blade shape directed sideward. In other words, the ultrasonic vibration transmitting member 27 is configured as a member having a different shape that is asymmetric with respect to its axis.

In the ultrasonic vibration transmitting member 27, an inner hole (not shown) is formed which communicates with a path (not shown) formed in the ultrasonic transducer 3 and the horn 4 described above. The distal end of the inner hole is open near the treatment section 29.

In the above configuration, after the treatment ultrasonic vibration transmitting member 27 is fixedly connected to the distal end of the horn 4 by screwing, the outer cover 2 and the inner cover 12 are relatively rotated as indicated by arrows in FIG. By doing so, the direction in which the outer cover 2 is gripped and the direction of the ultrasonic vibration transmission member 27 can be arbitrarily set. The set position is held by the frictional force of the O-rings 18 and 19 interposed between the outer cover 2 and the inner cover 12.

In this way, an irregularly shaped treatment unit whose gripping direction is specified
Despite the use of the ultrasonic vibration transmission member 27 having the 29, the exterior cover 2 can be set to a desired orientation that is easy to grasp, so that the operability of the handpiece 1 can be improved.

 FIG. 3 shows a second embodiment of the present invention.

In this embodiment, the O-ring 18 is located forward between the inner circumference of the inner hole 11 in the outer cover 2 and the outer circumference of the outer cover 12.
Intervene. In addition, a groove 31 is formed on the entire periphery of the rear end of the interior cover 12 around the rear end thereof. The outer cover 2 is provided with a tightening screw 32 that fits into the groove 31 corresponding to the groove 31, and the inner cover 12 is fixed by tightening the tightening screw 32.

In this embodiment, the treatment section of the ultrasonic vibration transmission member 27 is used.
29 is formed in a sickle-shaped variant. In addition, exterior cover 2
The tip of the water channel 23 formed in the outer cover 2 opens in the outer cover 2,
It communicates with the space around the horn 4. The others are the first
This is the same as that of the embodiment.

When the ultrasonic vibration transmitting member 27 for treatment is screwed into the tip of the horn 4 in the configuration of this embodiment, the inner cover 12 is fixed to the outer cover 2 by tightening the tightening screw 32. Therefore, since the outer cover 2 and the inner cover 12 are fixed and do not rotate, the ultrasonic vibration transmitting member 27 is easily screwed. When the ultrasonic vibration transmitting member 27 is screwed into the tip of the horn 4, the outer cover 2 is gripped as shown in FIG. 4 and a spanner is applied to the ultrasonic vibration transmitting member 27, which is generally performed. So that the outer cover 2 and the inner cover
Since 12 can be fixed, its screwing can be performed reliably and easily.

Further, if the fastening screw 32 is loosened, the outer cover 2 and the inner cover 12 can be relatively rotated, so that the operability of the handpiece 1 can be improved similarly to the first embodiment.

FIG. 5 and FIG. 6 show a third embodiment of the present invention.

The handpiece 1 in this embodiment is an ultrasonic vibrator 3
A ring formed of a conductive material such as metal with a flange 8 of the horn 4 connected to the flange 14 protruding inside the front end of the interior cover 12 through an electrically insulating elastic body 35 such as rubber. It is designed to be pressed and fixed with 15 and integrated. The horn 4 and the tightening ring 15 are electrically insulated by the elastic body 35.

A flange 36 is provided on the outer periphery of the rear end of the interior cover 12, and the flange 36 can be pressed and fixed by a fastening ring 37 screwed into the rear end of the exterior cover 2. That is, the outer cover 2 and the inner cover 12 can be integrally fixed by tightening the tightening ring 37.

An electric switch 38 is provided on the outer surface of the front end of the outer cover 12. The electric switch 38 is used to turn on and off the operation of the electric switch 38 when a high frequency treatment is used together. The wiring structure of the electric switch 38 is as follows. That is, the electrical switch 38
Has a first brush 41 on the positive electrode side of the first brush.
41 is in contact with the fastening ring 15. Electrical switch 38
A second brush 42 is provided on the negative electrode side of the second brush.
42 is in contact with the peripheral surface of the horn 4. A positive lead wire 42 is attached to the tightening ring 15 with which the first brush 41 slides.
Is connected. Horn 4 on which second brush 42 slides
Is made of metal, which is electrically connected to the rear metal block 7 through the suction pipe 16. The rear metal block 7 is connected to a lead wire 44 on the negative electrode side. Positive and negative lead wires 43 and 44 are bundled and power cord 2
Led by one.

Further, an O-ring 45 is interposed between the exterior cover 2 and the treatment ultrasonic vibration transmission member 27. In addition, about the other structure, the same thing as the thing of the above-mentioned Example attaches | subjects the same code | symbol, and abbreviate | omits detailed description.

In the above configuration, when the treatment ultrasonic vibration transmitting member 27 is fixedly connected to the tip of the horn 4 by screwing, the outer cover 2 and the inner cover 12 are integrally fixed by tightening the tightening ring 37. Do. Therefore, the screwing operation can be performed easily and reliably.

Further, if the tightening ring 37 is loosened, the outer cover 2 and the inner cover 12 can be relatively rotated, so that the relative position between the direction of gripping the outer cover 2 and the direction of the ultrasonic vibration transmission member 27 is determined. Can be set arbitrarily. This set position can be fixed by tightening the tightening ring 37 again.

In this way, despite the use of the ultrasonic vibration transmission member 27 having the odd-shaped treatment section 29, the user can set the desired direction in which the outer cover 2 can be easily gripped, so that the operability of the handpiece 1 can be improved.

On the other hand, when the outer cover 2 and the inner cover 12 are relatively rotated, the first brush 41 of the electric switch 38 comes into sliding contact with the tightening ring 15, and the second brush 42 contacts the peripheral surface of the horn 4. Since the conductive state is ensured by the sliding contact, no inconvenience such as entanglement of the lead wire or the like does not occur. In addition, this configuration can simplify the internal structure and reduce the size of the handpiece 1.

FIG. 7 shows a fourth embodiment of the present invention. In this embodiment, means for stopping rotation of the outer cover 2 and the inner cover 12 is provided. In this means, a toothed groove 51 is provided on a part of the outer periphery of the interior cover 12 over the entire circumference, and a rotation stopper 53 having a toothed groove 52 meshing with the groove 51 is provided on the exterior cover 2. The rotation stopper 53 is rotatably attached to the tip of a screw 54 that is inserted through the exterior cover 2 and screwed. A knob 55 is provided at the outer end of the screw 54.

Then, by rotating the screw 54 with the knob 55, the rotation stopper 53 together with the screw 54 according to the rotation direction.
Can move forward and backward. When the rotation stopper 53 is pushed forward, the groove 52 of the rotation stopper 53 meshes with the groove 51 on the outer periphery of the interior cover 12, and the rotation of the interior cover 12 can be prevented.

When the rotation stopper 53 is retracted, the engagement of the groove 52 of the rotation stopper 53 with the groove 51 on the outer periphery of the interior cover 12 is released, and the interior cover 12 can rotate freely. Therefore,
Since the outer cover 2 and the inner cover 12 can be relatively rotated, the relative position between the direction in which the outer cover 2 is gripped and the direction of the ultrasonic vibration transmitting member 27 can be arbitrarily set. It can be fixed to this set position using the rotation stopper 53.

In this way, despite the use of the ultrasonic vibration transmission member 27 having the odd-shaped treatment section 29, the user can set the desired direction in which the outer cover 2 can be easily gripped, so that the operability of the handpiece 1 can be improved.

8 to 10 show different modifications of the outer cover 2 respectively. All are configured in different shapes.

FIG. 8 shows the outer cover 2 to make it easier to grasp.
Is provided with a finger pad 61 on the outer periphery thereof.

FIG. 9 shows a case where a leak hole 62 for adjusting the suction pressure is provided on the outer periphery of the outer cover 2. The leak hole 62 is covered with the pad of a finger, and the suction pressure is adjusted according to the amount of the cover. It should be noted that the ultrasonic vibration transmitting member 27 in the one shown in FIG.

In the one shown in FIG. 10, the exterior cover 2 does not entirely cover the interior cover 12, and the partial exterior cover 2 fitted to a part of the outer periphery of the interior cover 12 is rotatably provided. A switch unit 65 is provided on the outer cover 2 to constitute an odd-shaped hand switch unit in which the direction of holding and holding is specified. Further, as in the case of the first embodiment, the base for connecting the water supply tube may be provided on the outer cover 2 partially provided therewith, and may be rotated with respect to the inner cover 12.

11 to 17 show various examples in which the means for connecting the lead wire 22 of the electrode cord to the electrode plate 6 of the ultrasonic transducer 3 is not soldered but is connected by physical pressing force. Is shown. According to this connection method, there is no peeling of the solder due to vibration as compared with the case of connection by solder, and the connection strength can be increased. Further, according to this connection method, no heat is applied at the time of connection, so that the element portion is not adversely affected by heat. Further, the size of the electrode portion can be reduced.

11 and 12, a cross-shaped protruding piece 71 is formed integrally with a part of the electrode plate 6. As shown in FIG. Then, as shown in FIG. 12, the distal end side is bent in a direction along the lead wire 22, and the exposed conducting wire portion of the lead wire 22 is wrapped and fastened by the left and right pieces 71a.

13 and 14, a strip-shaped protruding piece 72 is formed integrally with a part of the electrode plate 6. As shown in FIG. Then, as shown in FIG. 14, the exposed conductive wire portion of the lead wire 22 is wrapped around the distal end portion and fastened. In this example, processing of the electrode plate 6 becomes particularly simple.

15 to 17, a strip-like short protruding piece 73 is formed integrally with a part of the electrode plate 6. Also, a connection fitting 74 as shown in FIG. 17 is prepared. This connection fitting 74 forms a bent portion 74a which is crimped to the protruding piece 73 at one end thereof,
At the other end, a cross-shaped portion 74c is formed. Then, as shown in FIG. 16, the bent portion 74a of the connection
3, and the left and right half portions 74d of the cross-shaped portion 74b at the other end wrap and fasten the exposed conductive wire portion of the lead wire 22. According to this example, since the electrode plate 6 side is not bent, a decrease in strength due to bending can be avoided.

[Effects of the Invention] As described above, according to the present invention, the holding means for holding the ultrasonic vibration generating unit connected to the ultrasonic vibration transmitting member for treatment is provided rotatably with respect to the outer cover. The positional relationship between the treatment ultrasonic vibration transmission member and the outer cover can be freely selected and used. For this reason, for example, the direction of the treatment vibration transmitting member having directionality with respect to the odd-shaped handpiece can be rotated and positioned to an arbitrary direction that is desired by the operator. In particular, even if the fixed position of the vibration transmitting member with respect to the horn is varied, such as when the vibration transmitting member is fastened to the horn on the ultrasonic generating unit side with a screw, the vibration transmitting member can be adjusted to the easy-to-use direction. Therefore, the operability of the handpiece is improved, and the handpiece can be used to perform a safe, appropriate, and accurate fine operation.

[Brief description of the drawings]

FIG. 1 is a side sectional view of a handpiece showing a first embodiment of the present invention, and FIG. 2 is a rear view of the handpiece. FIG. 3 is a side sectional view of a handpiece showing a second embodiment of the present invention. FIG. 4 is a perspective view when a vibration transmitting member is attached. FIG. 5 is a side sectional view of a handpiece showing a third embodiment of the present invention, and FIG. 6 is a sectional view showing an enlarged part of the handpiece. FIG. 7 is a side sectional view of a handpiece showing a fourth embodiment of the present invention. 8 to 10 are perspective views of different handpieces. FIG. 11 is a front view of a part of the electrode plate,
FIG. 12 is a sectional view of a portion where a lead wire is connected to the electrode plate. FIG. 13 is a front view of a part of another electrode plate, and FIG. 14 is a cross-sectional view of a part connecting a lead wire to the electrode plate.
FIG. 15 is a front view of a part of another electrode plate, and FIG. 16 is a cross-sectional view of a part for connecting a lead wire to the electrode plate.
FIG. 17 is a perspective view of a connecting tool used for the connection. 1 ... handpiece, 2 ... exterior cover, 3 ... ultrasonic vibrator, 4 ... horn, 12 ... interior cover (holding frame),
24 ... Grip section, 17 ... Vibration transmission member, 29 ... Treatment section.

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) A61B 18/00 A61B 17/22 330

Claims (1)

(57) [Claims] 1. An external cover for gripping, an ultrasonic vibration generating section installed inside the external cover for holding, an ultrasonic vibration transmitting member for treatment connected to the ultrasonic vibration generating section, Holding means for rotatably holding the ultrasonic vibration transmission member for use with respect to the exterior cover.