JPS63214253A - 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 ultrasonic treatment device that uses ultrasonic vibrations to remove prostate glands, destroy stones, and the like.

[Prior Art] Recently, so-called ultrasonic treatment endoscopes have been known in which an ultrasonic treatment device is incorporated into an endoscope for performing prostate resection, stone destruction, and the like. The ultrasonic treatment device includes an ultrasonic transducer and a probe made of a metal pipe as an ultrasonic transmitter connected to the ultrasonic transducer. When the ultrasonic vibrator operates, the probe is caused to vibrate ultrasonically.

[Problems to be Solved by the Invention] By the way, in the ultrasonic treatment device having the above configuration, there are two cases in which the tip of the probe is pressed against the prostate, stone, etc. during actual treatment, and when the probe is pressed against the prostate, stone, etc. Since the resistance applied to the probe is different when the probe is driven without being pressed against the probe, a large difference also occurs in the amplitude of the vibration of the probe. In other words, since there is almost no resistance applied to the probe during idle driving, the repeated stress applied to the probe at that time becomes large, causing metal fatigue and causing early damage to the probe.

This invention was made based on the above circumstances, and its purpose is to vibrate the ultrasonic transmitting body with a large amplitude when the ultrasonic treatment device is not in an actual driving state, so as to quickly An object of the present invention is to provide an ultrasonic treatment device that does not cause damage.

[Means and effects for solving the problems] In order to solve the above-mentioned problems, the present invention provides an apparatus having an ultrasonic transducer and an ultrasonic transmitter for transmitting ultrasonic waves generated by the ultrasonic transducer. The apparatus includes a main body, a detection means for detecting the amplitude of vibration of the apparatus main body, and a control means for controlling the vibration of the ultrasonic transducer when the amplitude of the vibration detected by the detection means exceeds a predetermined value. do. This prevents the ultrasonic transmitter from continuing to vibrate at such a large amplitude that it may be damaged.

[Embodiment] Hereinafter, a second embodiment of the present invention will be described with reference to FIGS. 1 and 2. FIG. 1 shows an endoscope for ultrasonic treatment, and this endoscope for ultrasonic treatment is equipped with a sheath 1. As shown in FIG. An optical viewing tube 2 is inserted through the sheath 1. The optical viewing tube 2 has a standing portion 3 at the midpoint and an eyepiece portion 4 at the base end, and is generally crank-shaped as a whole. The optical viewing tube 2 has a midway portion supported by a support member 5 provided at the proximal end of the sheath 1.

The support member 5 is provided with an upper finger rest part 6 and a lower finger rest part 7. Further, a slider 9 is slidably provided on a portion of the optical viewing tube 2 that protrudes from the support member 5. The slider 9 is provided with a rear finger hook portion 10 projecting downward, and an ultrasonic treatment device 11 is removably attached to the slider 9 by a screw 9a.

In other words, this ultrasonic treatment apparatus] 1 has an ultrasonic transducer 12 and a probe 13 as an ultrasonic transmitter made of a metal pipe that is connected to the ultrasonic transducer 12 and vibrates ultrasonically. It is configured. The ultrasonic treatment device 11 is provided with its probe 13 slidably inserted into a mounting hole (not shown) formed in the support member 5. Therefore, the ultrasonic treatment device 11 and the slider 9 can be slid together in the forward direction. Further, a plate spring 14 curved into a substantially U-shape is provided between the support member 5 and the slider 9, so that the slider 9 can be slid against the restoring force of the plate spring 14. It has become.

On the other hand, the ultrasonic transducer 12 is provided with a detection element 15 as a detection means for detecting the amplitude of vibration of the ultrasonic transducer 12. The detection element 15 is made of piezoelectric rubber, for example, and may be attached to the outer peripheral surface of the ultrasonic transducer 12 (not shown), or may be attached to the outer peripheral surface of the ultrasonic transducer 12 as shown in this embodiment.
Any means may be used, such as sandwiching the vibration element 11a between the vibration element 11a forming the vibration element 2 and the horn 1lb.

The signal detected by the detection element 15 is transmitted to the power supply control device 16.
It is now entered into This power control device 16
As shown in FIG. 2, it has a signal processing section 17 to which the signal from the detection element 15 is input. This signal processing section 17
A control circuit 18, an amplifier power supply 19, and an amplifier 21 are sequentially connected to the terminal. A signal from the oscillation section 22 is input to the amplifier 2, and a drive signal is output to the ultrasonic transducer 12. Further, the drive signal output from the amplifier 21 is fed back to the oscillation section 22 via the feedback circuit 23.

Further, when the signal processing unit 17 detects that the amplitude of the vibration of the ultrasonic transducer 12 detected by the detection element 15 is equal to or higher than a predetermined value, that is, the probe 13 is in a state of idle operation, the ultrasonic wave A control signal for controlling the amplitude of vibration of the vibrator 12 is output.

Broadly speaking, the control signals described above include a first control that stops the oscillation of the ultrasonic transducer 11, and a second control that makes the oscillation of the ultrasonic transducer 12 a constant weak amplitude. The above-mentioned first control includes means for turning off the amplifier power supply 19 by hardware as shown in line a, means for turning off the amplifier power supply 19 via the control circuit 18 as shown in line b, and means for turning off the amplifier power supply 19 via the control circuit 18 as shown in line b. A conceivable method is to provide a switch element 24 such as a relay on the line that sends the drive signal to the acoustic wave transducer 12, and turn off the switch element 24 as shown by line C. Further, as the second control, as shown in line d, the amplifier 21 is controlled by hardware to reduce the drive signal outputted from the amplifier 21, and the above-mentioned line b is used to control the amplifier 21 via the control circuit 18. Possible means include controlling the output from the amplifier power supply 19 to be small.

Note that one end of a suction tube 25 communicating with the probe 13 is connected to the rear end surface of the ultrasonic transducer]2. The other end of this suction tube 25 is connected to a suction pump (not shown). Further, a water tap 26 is provided at the base end of the sheath 1. Cooling water for cooling the probe 13 is supplied into the sheath 1 from the water tap 26, and the cooling water is sucked from the probe 13 into the suction tube 25.

When using an endoscope for ultrasound treatment with such a structure, first place the index finger of one hand on the upper finger rest part 6, and place the middle finger, ring finger, and little finger on the lower finger rest part 7. To hold the endoscope, place the thumb on the rear finger rest 10. Then, when the sheath 1 is inserted into the body cavity and the interior of the body cavity is observed through the eyepiece 4 of the optical viewing tube 2, and a treatment area such as a prostate or a stone is found, a main switch (not shown) of the power supply control device 16 is turned on. Turn it on and grasp the other hand that was holding the endoscope. Then, the ultrasonic treatment device 11 slides together with the slider 9 against the restoring force of the leaf spring 14, and the tip of the probe]3 protrudes from the tip of the sheath 1 without ultrasonic vibration. When the tip of the probe 13 protruding from the sheath hits a treatment area such as the prostate or a stone, ultrasonic vibrations are generated.The probe 13 performs operations such as cutting the prostate and crushing stones.

By the way, the above-mentioned ultrasonic treatment device 11 is used as its probe ] 3
When the tip of the probe 13 is subjected to ultrasonic vibration without contacting the treatment section, that is, when it is idle-driven, the probe 13 vibrates with a larger amplitude than when it is actually driven. Then, since this fact is detected by the detection element 15, the detection signal is input to the signal processing section]7 of the power supply control device 16.

The signal processing section 17 processes the signal from the detection element 15 and outputs a control signal for controlling the amplitude of vibration of the ultrasonic transducer 12. As a control signal, as shown by lines a and bSc in Fig. 2, the ultrasonic transducer 1
2 or the ultrasonic transducer 12
A second control is performed to weaken the oscillation to a predetermined amplitude. Therefore, since the vibration of the probe 13 is stopped or weakened, the probe 13 will not continue to vibrate with a large amplitude and be damaged.

FIG. 3 shows a second embodiment of the invention, in which the support member 5
A detection element 31 consisting of an optical sensor is provided on the support member 32, and this detection element 31 detects the amplitude and frequency of vibration of the writing probe 13.

FIG. 4 shows a third embodiment of the present invention, in which the ultrasonic transducer 12 is covered with a cover 33, and a microphone 3 is attached to the cover 33.
4 is provided, and after picking up the oscillation sound of the ultrasonic vibrator 12 with this microphone 34, only the sound near the oscillation frequency is detected through a filter circuit (not shown), and the amplitude of the vibration is detected based on the volume. It is.

Further, although not shown, a strain gauge may be attached to the probe 13, and the strain due to vibrations occurring in the probe 3 may be detected by this strain gauge.

〔Effect of the invention〕

As described above, the present invention detects the amplitude of the vibration of the main body of the device consisting of the ultrasonic transducer and the ultrasonic transmitter, and detects when the amplitude of the vibration exceeds a predetermined value based on this detection signal. The vibration of the sonic vibrator was controlled. therefore,
Since it is possible to prevent the ultrasonic vibrator from being idle-driven and continuing to vibrate with a large amplitude, it is possible to prevent the ultrasonic transmitter from being damaged at an early stage.

[Brief explanation of the drawing]

FIG. 1 is a partially sectional side view of an ultrasonic treatment device according to a first embodiment of the present invention installed in an optical viewing tube;
The figure also shows the configuration of the power supply control device, FIG. 3 is a partially sectional side view of an ultrasonic treatment device according to a second embodiment of the present invention incorporated into an optical viewing tube, and FIG. 4 is a side view of this device. Third invention
FIG. 2 is a side view of a portion of an ultrasonic transducer showing an embodiment of the present invention. 11... Ultrasonic treatment device, 12... Ultrasonic vibrator,
13... Probe, 15... Detection element, 16...
Power control device.

Claims (3)

[Claims] (1) An apparatus main body having an ultrasonic transducer and an ultrasonic transmitter that transmits the ultrasonic waves generated by the ultrasonic transducer;
The apparatus is equipped with a detection means for detecting the amplitude of vibration of the main body of the apparatus, and a control means for controlling the vibration of the ultrasonic transducer when the amplitude of the vibration detected by the detection means exceeds a predetermined value. Features of ultrasonic treatment equipment. (2) The ultrasonic treatment apparatus according to claim 1, wherein the control of vibration by the control means reduces vibration. (3) The ultrasonic treatment apparatus according to claim 1, wherein the vibration control by the control means keeps the amplitude of the vibration constant.