JPH03114456A - Handpiece for ultrasonic operation - Google Patents

Abstract

PURPOSE:To secure a visual field and to enhance operability and washing efficiency by fixing a suction pressure control member to the outer periphery of a handpiece in a freely detachable manner and providing a suction pressure control tube connecting the suction pressure control hole of the suction pressure control member to the branch passage of a connection member. CONSTITUTION:A handpiece 1 has an ultrasonic probe 3 arranged within the cover 2 thereof and the ultrasonic probe 3 is constituted by connecting an ultrasonic vibrator part 6 formed by laminating piezoelectric elements 4 and electrodes 5, a horn part 7 and a vibration transmitting member 8. A suction hole 15 is formed to the probe so as to communicate with the hollow hole 14 of the vibration transmitting member 8 and communicates with a connection member 16 and a suction pressure control tube 19 is connected to the connection member 16. A suction pressure control member 25 is mounted on the outer periphery of the leading end part of the cover 2 in a freely detachable manner and, when a fixing screw 28 is loosened, the suction pressure control member 25 can be rotated at that position to be able to move in forward and rearward directions. A suction pressure control hole 31 is formed to the suction pressure control member 25 and the opening part of the suction pressure control hole 31 can be arbitrarily closed in necessary quantity by the finger of an operator. The suction pressure control member is detached to achieve the security of a visual field and the enhancement of operability and washing efficiency.

Description

Detailed Description of the Invention [Industrial Application Field] The present invention relates to an ultrasonic surgical handpiece, and particularly to a handpiece for adjusting the suction pressure when removing biological tissues and stones by suction after crushing them. The present invention relates to an ultrasonic surgical handpiece equipped with an adjustment section.

[Prior Art] Generally, this type of ultrasonic surgical handpiece has a vibration transmitting member, and its tip is brought into contact with living tissue, stones, etc. Then, ultrasonic vibration is applied to the biological tissue or the like to be removed through the vibration transmission member, and the vibrating energy is used to cut or crush the tissue.

Furthermore, in order to facilitate this resection or crushing surgical operation, an ultrasonic surgical hand is used to suction and remove the crushed tissue pieces from the tip of a suction hole formed in the vibration transmitting member at the same time as the excision or crushing process. pieces have been proposed (see, for example, Japanese Utility Model Application Publication No. 61-203010 and Japanese Utility Model Application Publication No. 63-135615).

Further, when the crushed pieces are suctioned and removed after being cut or crushed by ultrasonic vibration energy, the suction pressure is usually adjusted using a suction device such as a suction pump section provided separately. However, according to this method, delicate adjustment of the suction pressure cannot be performed. For example, there are inconveniences such as bleeding caused by suctioning or cutting microvessels using suction pressure during surgery.

Therefore, in order to make delicate adjustments to the suction pressure near the handpiece, it has been proposed that, for example, a suction pipe is fixedly provided with a member for adjusting the suction pressure at or near the handpiece. (Jikai Showa 6)
1-203010).

Also known is a handpiece in which a pressure adjustment part is rotatably provided on the outer periphery of the handpiece (Utility Model Publication No. 63-135615
(see publication).

[Problems to be Solved by the Invention] As described above, conventionally proposed means for adjusting the suction pressure are those in which the suction pressure adjustment member is fixed to the hand piece or rotates on the outer periphery of the hand piece. It's just that.

However, in actual usage conditions, it has been found that it is extremely important that the suction pressure adjusting member can be moved back and forth and its installation position can be freely selected.

Further, when the suction pressure adjustment operation is not necessary, the suction pressure adjustment member is rather a hindrance to the operation, and also has drawbacks such as obstructing the field of view. However, with the conventional one,
It was not something that could be removed depending on the circumstances.

For this reason, in fields such as neurosurgery, which require delicate hand movements, problems may arise in operation, such as the way the operator grips the handpiece during surgery. Further, even when adjustment of the suction pressure is not required, the suction pressure adjustment member cannot be removed, which obstructs the field of view or impairs operability.

Furthermore, the suction pressure adjustment mechanism cannot be removed when cleaning the handpiece, making it difficult to clean and troublesome to handle.

The present invention has been made with attention to the above-mentioned problems, and its purpose is to solve problems related to operability caused by the suction pressure adjustment member of an ultrasonic surgical handpiece being fixed or rotating only, and to solve problems related to the suction pressure. Eliminates the obstruction of the field of view or the malfunction during operation caused by the adjustment member being non-removable.
An object of the present invention is to provide a tip piece for ultrasonic surgery with a suction pressure adjustment mechanism that has good operability and the like.

[Means and effects for solving the problems] In order to solve the above problems, the ultrasonic surgical handpiece of the present invention is provided with a connecting member that communicates with the suction hole formed in the vibration transmission member and connects the suction tube, Further, a suction pressure adjustment member having a suction pressure adjustment hole that adjusts the suction pressure by adjusting the amount of leakage is detachably fixed to an arbitrary position on the outer periphery of the handpiece at least in the axial direction.

Furthermore, the suction pressure adjustment hole of the suction pressure adjustment member and the branch passage of the connection member were connected with a suction pressure adjustment tube.

As a result, the position of the suction pressure adjusting member can be adjusted in the front-rear direction when using a straight type head piece, and in the rotational direction and front-rear direction when using a bent type head piece. Therefore, the suction pressure can be adjusted at a position of the operator's preference.

Furthermore, when adjustment of the suction pressure is not necessary or when cleaning the handpiece, the suction pressure adjustment member can be removed to secure a field of view, improve operability, and improve cleaning efficiency.

[Embodiment] FIGS. 1 to 5 show a first embodiment of the present invention. As shown in FIG. 1, this handpiece 1 has an ultrasonic probe 3 disposed inside a cover 2. As shown in FIG. The ultrasonic probe 3 includes a piezoelectric element (for example, PZT) 4 and an electrode 5.
an ultrasonic transducer section (vibration generating section) 6 formed by laminating a plurality of layers, a horn section 7 that amplifies the ultrasonic vibrations generated by the ultrasonic transducer section 6, and a hollow pipe connected to the tip of the horn section 7. The vibration transmitting member 8 is constructed by connecting these members. An ultrasonic transducer section 6 formed by laminating a piezoelectric element (for example, PZT) 4 and an electrode 5 includes a horn section 7 and a backing plate 11.
are integrally connected by tightening them with bolts 12 and nuts 13.

Further, the ultrasonic probe 3 has a hole penetrating back and forth along its central axis, which communicates with the hollow hole 14 of the vibration transmitting member 8, thereby forming a suction hole 15.

Further, the suction hole 15 communicates with a connecting member 16. As shown in FIGS. 4 and 5, the connecting member 16 passes through the rear end wall of the cover 2 and is rotatably provided around the central axis of the ultrasound probe 3. As shown in FIGS. A suction tube 18 is connected to the first mouth portion 17 along the central axis. In addition, the connection member 16 includes a suction pressure adjustment tube 19.
A second opening (branch passage) 20 is formed to branch. This second mouth portion 20 is provided so as to protrude to the side perpendicular to the rotation center axis of the connecting member 16 .

Furthermore, as shown in FIGS. 4 and 5, the connecting member 16 rotatably penetrates the rear end wall of the cover 2, and the space therebetween is sealed by an O-ring 23.

On the other hand, a suction pressure adjusting member 25 is removably attached to a portion of the hand piece 1 other than the grip portion 24 of the cover 2, in this embodiment, on the outer periphery of the distal end portion of the cover 2. This suction pressure adjustment member 25 has a ring portion 26 that fits around the outer periphery of the distal end portion of the cover 2, and a fastening piece 27, and the fastening piece 27 can be tightened by tightening the fixing screw 28. The suction pressure adjusting member 25 is crimped onto the outer periphery of the distal end portion and constitutes a means for removably fixing the suction pressure adjusting member 25.

Also, the cover 2 to which this suction pressure adjustment member 25 is attached
The distal end portion of the probe is formed into a cylindrical shape with the same diameter, and becomes semi-fixed by loosening the fixing screw 28, and can be rotated in that position and moved in the direction along the central axis of the ultrasound probe 3 (back and forth direction). It is now possible to do so.

Furthermore, as shown in FIG. 3, the suction pressure adjustment member 25 is formed with a suction pressure adjustment hole 31 that opens upward. This suction pressure adjustment hole 31 is formed as an elongated opening in the front and rear direction,
This opening can be closed as desired by the fingers of the operator's hand.

This suction pressure adjustment member 25 is provided with a third opening 33 to which the other end of the suction pressure adjustment tube 19 connected to the second opening 22 of the connection member 16 is connected. The suction pressure adjustment tube 19 is connected to the suction pressure adjustment hole 31 of the suction pressure adjustment member 25 via this third opening 33 .

Therefore, when using the handpiece 1, the operator first places the suction pressure adjustment member 2 in a position that suits the usage situation and himself/herself.
Position 5. That is, by loosening the fixing screw 28, the suction pressure adjusting member 25 is placed in a semi-fixed state, and can be rotated at that position, or moved in a direction along the central axis of the ultrasound probe 3 (front-back direction) to a position that is easy to use. Select.

Once the position is selected, the fastening piece 27 is tightened with the fixing screw 28 and fixed to the outer periphery of the cover 2.

At this time, the connecting member 16 is rotated in accordance with the position of the suction pressure adjustment member 25, and the suction pressure adjustment tube 19 is rotated.
position so that it does not interfere with operation. Connection member 1
6 is rotatable, so when the suction pressure adjustment member 25 is rotated, it is pulled by the suction pressure adjustment tube 19 that follows it and rotates in the same way, thereby causing the suction pressure adjustment tube 19 to rotate. It can prevent jamming.

In this way, since the suction pressure adjustment member 25 can be fixed at any position, the way to grip the handpiece 1 is not determined. In addition, operability is improved because the surgeon can hold the device in a way that suits his or her preference. Furthermore, since the suction pressure adjustment member 25 can be removed from the top of the handpiece 1, it can be removed when cleaning or adjustment of the suction pressure is not necessary, which is convenient.

By removing the suction pressure adjustment tube 19 and the suction pressure adjustment member 25, a more sufficient field of view can be secured during use.

6 and 7 show a second embodiment of the present invention. The suction pressure adjusting member 25 of this embodiment is provided with a third opening 33 in the same manner as in the above embodiment, but the handpiece 1
A pair of clip pieces 36a with arcs that closely fit around the outer periphery of
, 36b, the clip 36 is detachably attached to the outer periphery of the hand piece 1. In addition, each clip piece 36
a136b is biased by springs 37a and 37b, respectively, in a direction to tightly contact the outer periphery of the hand piece 1. The operation piece 3 is connected to each clip piece 36a, 36b.
8a and 38b, it can be operated in the direction of release. The other configurations are the same as those of the above embodiment.

Therefore, in this embodiment, by sandwiching the outer periphery of the hand piece 1 between the clip pieces 36a and 36b of the clip 36, the suction pressure adjusting member 25 can be placed at any position on the outer periphery (including the rotational position and the front and rear positions). Can be fixed.

Therefore, as in the case of the first embodiment described above, the operability can be improved, and if adjustment of the suction pressure is not necessary, it can be removed to secure the field of view.

FIGS. 8 and 9 show a third embodiment of the present invention.

In this embodiment, the suction pressure adjusting member 25 is movable along the outer circumference of the distal end portion of the cover 2 in its axial direction. A recess 41 is formed on the lower surface of the suction pressure adjusting member 25, and a protrusion (rail) 42 that engages with the four parts 41 is provided on the outer periphery of the tip side portion of the cover 2, and the suction pressure is adjusted along the protrusion 42. It is engaged so that the adjustment member 25 can be moved in the longitudinal axis direction of the hand piece 1. Further, the distal end position of the suction pressure adjusting member 25 is regulated by the proximal edge of the distal end sheath 2a, which is detachably attached to the cover 2.

In addition, when removing the suction pressure adjustment member 25, remove the distal sheath 2a and move it to the distal end side of the cover 2.
It is designed so that it can be removed from the terminal end of the convex portion 42.

Thus, the suction pressure adjusting member 25 has the concave portion 41 and the convex portion 42.
The device is removably installed by engaging with the device, and its position in the front-rear direction can be selected. Therefore, like the first and second embodiments described above, the operability is improved, but the suction pressure adjusting member 25
When used with a straight type handpiece 1 that does not require rotation, the handpiece does not move unnecessarily, resulting in improved operability. The rest is the same as that of the above embodiment.

FIG. 10 shows a fourth embodiment of the present invention. The suction pressure adjusting member 25 in this embodiment is attached to an annular movable member 45 that fits on the outer periphery of the cover 2 of the hand piece 1, and an O-ring 46, 46 is provided on the inner surface of the movable member 45 to control this. It is adapted to come into pressure contact with the outer periphery of the cover 2.

Thus, the suction pressure adjusting member 25 is semi-fixedly provided to the cover 2 by the movable member 45, and is capable of rotation and movement in the front-rear direction.

The movable member 45 can be moved back and forth and rotated on the hand piece 1, and the suction pressure adjusting member 25 can be removed by moving it toward the distal end of the hand piece l, which is smaller than the inner diameter of the movable member 20. It can also be installed in reverse from this point.

Therefore, as in each of the above embodiments, the operability is improved;
Also, it is possible to achieve effects such as securing a field of view when the suction pressure adjustment is not required.

FIG. 11 shows a fifth embodiment of the present invention. In this embodiment, the suction pressure adjusting member 25 is provided with a joint piece 51 having an arc-shaped inner surface that is joined to the outer periphery of the cover 2 made of a magnetic material of the hand piece 1. A magnet 52 is provided to attract the outer periphery of the holder.

The suction pressure adjusting member 25 can be fixed at any position on the outer periphery of the cover 2 by the action of the magnet 52 provided on the joint piece 51.

Further, the suction pressure adjusting member 25 can be removed together with the connecting piece 51, and can be rotated and moved in the front and rear directions, so that the same effects as those of the above-mentioned embodiments can be expected.

12 to 13 show a sixth embodiment of the present invention.

The suction pressure adjusting member 25 of this embodiment has a plurality of suction cups 55 on its lower surface, and is adapted to be attracted to the circumferential surface of the cover 2 of the hand piece 1, which has a smooth surface.

Therefore, the suction cup 55 can be attached to any position on the surface of the cover 2 of the hand piece 1.

Therefore, similar to the embodiments described above, effects such as improved operability and secured field of view when suction pressure adjustment is not required can be expected.

Note that the present invention is not limited to the above embodiments. The suction pressure adjusting member is not limited to the cover, and may be directly connected to the handpiece.

[Effects of the Invention] As explained above, when the ultrasonic surgical handpiece provided with the movable suction pressure adjustment member according to the present invention is used, even when performing microsurgery such as brain surgery, it is possible to perform any desired operation according to the operator's preference. Operability is improved because the suction pressure can be adjusted depending on the position.

Furthermore, when adjustment of the suction pressure is not necessary or when cleaning the handpiece, the suction pressure adjustment member can be removed to secure a field of view, improve operability, and improve cleaning efficiency.

[Brief explanation of drawings]

1 to 5 show a first embodiment of the present invention, FIG. 1 is a side sectional view of the handpiece, FIG. 2 is a side view of the handpiece, and FIG. 3 is a suction pressure adjustment member. FIG. 4 is a rear view of the handpiece, and FIG. 5 is a side sectional view of the vicinity of the rear end of the handpiece. 6 and 7 show a second embodiment of the present invention, in which FIG. 6 is a perspective view of the suction pressure adjusting member, and FIG. 7 is a front view of the suction pressure adjusting member. 8 and 9 show a third embodiment of the present invention, with FIG. 8 being a side view of the handpiece, and FIG. 9 being a longitudinal cross-sectional view of the distal end thereof. FIG. 10 is a side sectional view of the vicinity of a suction pressure adjusting member showing a fourth embodiment of the present invention. FIG. 11 is a perspective view of a suction pressure adjusting member showing a fifth embodiment of the present invention. 1st
2 to 13 show a sixth embodiment of the present invention, FIG. 12 is a plan view of the suction pressure adjusting member, and FIG. 13 is a side view of the suction pressure adjusting member. DESCRIPTION OF SYMBOLS 1... Hand piece, 2... Cover 3... Ultrasonic probe, 8... Vibration transmission member, 15... Suction hole, 16... Connection member, 18... Suction tube, 25
...Suction adjustment member, ...Suction pressure adjustment hole.

Claims (1)

[Claims] An ultrasonic surgical handpiece having an ultrasonic vibrator and a vibration transmission member, comprising: a suction hole that communicates the ultrasonic vibrator and the vibration transmission member; and a connection member that communicates with the suction hole and has a branch passage. , a suction tube that communicates with the suction hole and the branch passage through the connecting member, a suction pressure adjustment member having a suction pressure adjustment hole that adjusts the suction pressure by adjusting the amount of leakage, and this suction pressure adjustment member. and a suction pressure adjustment tube that connects the suction pressure adjustment hole of the suction pressure adjustment member and the branch passage of the connection member. An ultrasonic surgical handpiece that is characterized by: