JPS62213744A - Ultrasonic treatment apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an improvement in an ultrasonic treatment device that performs treatments such as prostatectomy and stone destruction using ultrasonic vibrations.

[Conventional technology]

Conventionally, in transurethral resection of the prostate, the affected tissue is cauterized and removed using high-frequency current.

However, since such resection causes degeneration and whitening of the cauterized living tissue, it is difficult to determine the extent of resection, and there is a risk that normal tissue may also be resected.

Therefore, recently, an ultrasonic treatment device has been used to perform resection. This includes the patent application 1986-120.
No. 1, Japanese Patent Application No. 60-210510, etc., an ultrasonic transducer (
A structure in which two ultrasonic vibration generators are connected via a horn is used.

Then, using an endoscope or the like, the tip of the probe was pressed against the prostate gland and ultrasonic vibrations were applied to the tissue to remove it. Of course, this also applies when destroying stones.

By the way, in such an ultrasonic treatment device,
As shown in No. 2-93, there is a method in which treatment is performed using a probe with a bent tip. In this ultrasonic treatment device as well, like a probe with a straight tip, ultrasonic vibrations with the tip of the probe as the antinode of amplitude are transmitted to the probe, and treatment is performed using the amplitude of the tip.

[Problems that the invention seeks to solve] However, although conventional ultrasonic treatment devices with a bent portion at the tip have good operability in a limited area due to the bent portion, the probe has a single vibration. Since it only vibrates in one direction, its destructive ability and cutting ability are limited, making it impossible to perform efficient treatment.

This invention was made with attention paid to such problems, and an object thereof is to improve treatment ability using ultrasonic vibration.

[Means for solving problems]

This device is provided with a frequency switching means 21 for switching to an oscillation frequency in which the tip of the vibration transmitting member 8 is the antinode of the amplitude or the bent portion 8a of the vibration transmitting member 8 is the antinode of the amplitude.

[Effect]

In this device, by switching the frequency switching means 21, ultrasonic vibrations such that the tip of the vibration transmitting member 8 becomes an antinode are transmitted to the vibration transmitting member 8 to cause the tip to vibrate in the axial direction of the bent portion 8a. A plurality of vibration directions are obtained by transmitting ultrasonic vibration such that the bent portion 8a of the member 8 has an antinode to the vibration transmission member 8 and vibrating the tip along with the entire curve in the axial direction of the vibration transmission member 8. .

〔Example〕

The present invention will be explained below based on an embodiment shown in FIGS. 1 to 4. FIG. 3 shows the entire ultrasonic treatment device, with reference numeral 1 indicating a gripping section and 2 an ultrasonic vibrator (corresponding to an ultrasonic vibration generating section) built into the rear side of the exterior case 1a that constitutes the grasping section 1. , 3 is a conical horn disposed at the tip side of the outer case 1a. The ultrasonic transducer 2 has
A Langevin type is used in which a plurality of piezoelectric elements 4 and a plurality of electrode plates 5 are arranged alternately and sandwiched between a front metal block 6 and a rear metal block 7. . The front metal block 6 and the horn 3 are connected. Also, at the tip of horn 3,
A probe 8 (corresponding to a vibration transmission member) made of a pipe is connected. And, on the tip side of this probe 8,
A bent portion 8a (corresponding to a bent portion) is formed by bending (or curving) the tip in a substantially dogleg shape, and the ultrasonic wave generated by the ultrasonic transducer 2 is directed to the tip of the bent portion 8a. This makes it possible to transmit vibrations. In addition, the grip part 1
A passage 9 communicating with the lumen of the probe 8 is provided at the center (the center of the ultrasonic transducer 2, horn 3, etc.), and together with the lumen constitutes a suction path. A suction pump (not shown) is connected via a suction tube 11 to a suction port body 10 serving as an end of this passage 9, so that suction can be performed from the opening at the tip of the probe 8.

On the other hand, 12 is a power supply device, and 13 is a foot switch.

The foot switch 13 is, for example, an on/off operation section 1
3a and a frequency switching operation section 13b.

This foot switch 13 is connected to the input side of the power supply device 12 via a cable 14, and
The output side of the ultrasonic transducer 2 is connected to each electrode plate 5 of the ultrasonic transducer 2 via a cable 15. The circuit configuration of the power supply device 12 is shown in FIG.

Here, if the power supply device 12 is explained, 16 is an oscillation part for driving the ultrasonic transducer 2. This oscillation section 16 is connected to an oscillation transformer 19 connected to the ultrasonic transducer 2 via an amplifier section 18. This allows the ultrasonic vibrator 2 to vibrate.

Further, 20 is a control section, and the foot switch 13 is connected to the input side of this control section 20. The output side of this control section 20 and the input side of the oscillation section 16 are connected via a frequency switching circuit 21, and the frequency switching operation section 13b is operated by the functions of the control section 20 and the frequency switching circuit 21. The oscillation frequency of the oscillation section 16 can be switched between the frequency at which the probe end swings to its maximum amplitude and the curved portion of the probe 8 to its maximum swing frequency.

Specifically, for example, in the frequency switching circuit 21, the bending point of the bending portion 8a as shown in FIG.
An oscillation frequency A that vibrates the probe end with maximum amplitude with the tip of the probe as an antinode, and an oscillation frequency B that vibrates the bent part 8a with maximum amplitude with the bending point of the probe 8 as an antinode as shown in FIG. A circuit capable of switching between two frequencies is used, so that the oscillation frequency in the oscillation section 16 can be changed into two types. Of course, the oscillation section 16 uses a circuit that can vary the oscillation frequency.

Further, the control section 20 includes, for example, the frequency switching operation section 13b.
When the probe tip is turned off, the frequency switching circuit 21 is switched to the side where the tip of the probe becomes the antinode, and when the frequency switching operation section 13b is turned on, the frequency switching circuit 21 is switched to the side where the bent part 8a becomes the antinode. foot switch 1
It has a structure that changes the frequency according to the operation in step 3.

An on/off operation section 13a is connected to the control section 20, and the power supply device 12 is turned on or off by operating the on/off operation section 13a. Although not shown, a suction pump is also connected to the control unit 20.

Next, the operation of such an ultrasonic treatment device will be explained.

For example, when cutting an affected tissue, the tip of the probe 8 is pressed against the target affected tissue. Thereafter, when the on/off operation section 13a is operated with a foot, the ultrasonic transducer 2 is driven and oscillates at the oscillation frequency A. As a result, ultrasonic vibrations are transmitted to the probe 8, as shown in FIG. 1, with the tip having an antinode of amplitude and the bent portion 8a being a node. This vibration (standing wave) exhibits the same vibration direction as the conventional one because the probe end has an antinode of amplitude. In other words, the tip of the probe 8 vibrates along the bending direction as shown by arrow X. This vibration is then applied to the affected area, and the affected tissue is ablated. Note that the excised tissue is discharged out of the body through the suction path by the suction force of the suction pump that operates in accordance with the operation of the ultrasonic transducer 2.

During this resection, if the patient cannot perform the resection as desired, the user operates the frequency switching operation section 13b with his/her foot. As a result, the oscillation frequency A is switched to the oscillation frequency B with the bending portion 8a as the antinode as shown in FIG. At this frequency, the bending point vibrates with the maximum amplitude, so the tip of the probe 8 vibrates together with the bending portion 8 with the axial direction (arrow Y) of the probe 8 as the vibration direction. As a result, the direction of resection of the affected area is changed, and the undesirable affected area can be efficiently removed.

By appropriately changing the vibration directions of these plurality of parts and performing ablation, efficient ablation can be performed. In other words, it is possible to improve the treatment capability of ultrasonic vibrations.

Although the explanation was given using the example of resection using ultrasonic vibration,
Needless to say, the same applies to treatments that destroy stones using ultrasonic vibrations.

Further, although a foot switch is used in one embodiment, a changeover switch may be attached to the power supply device to switch the oscillation frequency.

〔Effect of the invention〕

As explained above, according to the present invention, it is possible to obtain a plurality of switchable vibration directions, and by appropriately using these vibration directions, efficient treatment can be performed. As a result, the treatment ability by ultrasonic vibration can be improved.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, in which Fig. 1 is a side view showing the state in which the tip of the vibration transmission member is vibrated in the vibration direction along the bending part, and Fig. 2 is a side view showing the tip of the vibration transmission member vibrating in the vibration direction along the bending part. FIG. 3 is a side view showing a state in which the member is vibrated in the vibration direction along the axis of the member, FIG. 3 is a sectional view showing the structure of the ultrasonic treatment device, and FIG.
The figure is a block diagram showing the electrical system. 2... Ultrasonic vibrator (ultrasonic vibration generator), 8...
Probe (vibration transmission member), 8a...Bending part (bending part), 13, 20.21... Foot switch, control part 9
Frequency switching circuit (frequency switching means), 16... oscillation section.

Claims (1)

[Claims] an ultrasonic vibration generating section; a vibration transmitting member having a bent portion at its tip that transmits the ultrasonic vibrations from the ultrasonic vibration generating section to a target position within a living body; and a vibration transmitting member for driving the ultrasonic vibration generating section. an oscillating section; and frequency switching means for changing the oscillation frequency of the oscillating section so that the tip of the vibration transmitting member is at the antinode of the amplitude or the bending section is at the antinode of the amplitude. Sonic treatment device.