JP2000271140A - Ultrasonosurgery device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an ultrasonosurgery device to be set immediately for the condition for implementing ultrasonic operation by detecting whether an ultrasonosurgery instrument is in the normal condition for use or not. SOLUTION: Plural hand-pieces 3A, 3B, etc., including ultrasonic resonators 16a, 16b, etc., respectively driven with different resonance frequencies are selectively connected to the main body 2 of this device. When a starting means 24 of the device is turned on, a control circuit 9 starts to operate and is oscillated by a standard oscillating circuit 7 with different frequencies. Then, a resonance point detection circuit 15 sends a result of detection corresponding to the existence of a resonance point based on the phase, etc., of the voltage and electricity of drive signals applied to the hand-pieces 3A, 3B. When a resonance point is detected, information on the frequency at the resonance point is saved in a saving means 21. And when the operation to output treatment output is actually executed, the standard oscillating circuit 7 is oscillated based on the saved information. If no resonance point is judged to exist, the judgement is informed to a user by means of a display circuit 22, etc., so that whether an ultrasonic treatment is possible or not can be recognized before the actual operation of outputting treatment outputs.

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 performing an operation using ultrasonic waves.

[0002]

2. Description of the Related Art Generally, it is desirable that a vibrator used for an ultrasonic scalpel for a surgical operation be driven at or near its fundamental resonance frequency. With respect to such a technique, a drive device based on a PLL (Phase Locked Loop) system that controls the drive frequency and the resonance frequency so as to match each other is known as a known technique.

[0003] Among such prior art, Japanese Patent Laid-Open No.
Japanese Patent Application Laid-Open No. 245275 discloses a technology in which a reference signal oscillator, a switch means for switching between a feedback signal and the reference signal are provided, and driving is performed with the reference signal when oscillation is started.

FIG. 15 shows a first conventional example of Japanese Patent Laid-Open No.
This is an ultrasonic operation apparatus disclosed in Japanese Patent No. 245275. This ultrasonic surgical apparatus comprises an apparatus main body 2 'and a handpiece 3' connected to the apparatus main body 2 '. Ultrasonic energy supplied from the apparatus main body 2' is applied to the handpiece 3 'by an ultrasonic machine. An ultrasonic transducer for converting into a signal is included. The handpiece 3 'is 3a, 3b, 3
As shown in FIG. 3C, the ultrasonic transducers have various shapes, and the ultrasonic transducers inherent therein have their respective resonance frequencies.

[0005] A drive circuit 4 constituting the apparatus main body 2 'generates a signal for generating ultrasonic energy. An amplifier 5 is connected to the drive circuit 4. This amplifier 5
Power-amplifies the ultrasonic energy signal generated by the drive circuit 4.

[0006] The amplifier 5 is connected to a detection circuit 6.
The detection circuit 6 detects voltage and current phase signals θv and θi from the ultrasonic energy amplified by the amplifier 5. At this time, the detected voltage phase signal θv is transmitted to the drive circuit 4. The detection circuit 6 includes a handpiece 3 '.
And supplies ultrasonic energy to the handpiece 3.

Further, a reference oscillator 7 is provided in the apparatus main body 2 ', and the reference oscillator 7 is an oscillator which oscillates at an ultrasonic frequency which is firstly driven by the drive circuit 4. Since the handpiece 3 has each resonance frequency, the handpiece 3 is provided with reference oscillation frequency changing means Ra, Rb, Rc so as to oscillate at a frequency near each resonance frequency.

[0008] Switching means 8 is connected to the reference oscillator 7. The switching means 8 is transmitted with the current phase signal θi detected by the detection circuit 6 described above. The switching means 8 receives a signal of the reference frequency oscillated from the reference oscillator 7, and switches so that the signal of the reference frequency input from the reference oscillator 7 is transmitted to the drive circuit 4 during driving oscillation. Can be

A control circuit 9 is connected to the switching means 8. The output SW 10 is connected to the control circuit 9. The output SW 10 is used to drive the handpiece 3
The N / OFF signal is transmitted to the control circuit 9. The control circuit 9 controls the switching unit 8 so that the output of the switching unit 8 switches to the current phase signal θi detected by the detection unit 6 after a certain period of time after the output SW 10 is turned on.

The driving circuit 4 includes a phase comparator 11, a low-pass filter 12, and a VCO 13. The voltage phase signal θv detected by the detection circuit 6 is input to one end of the phase comparator 11, and the signal of the reference frequency or the current phase signal θi input from the switching means 8 is input to the other end. A signal is output to set the frequency so that the phases of the waveforms match.

The phase comparator 11 has a low-pass filter 12
Is connected. The signal output from the phase comparator 11 is filtered through a low-frequency component to generate a voltage necessary for matching the voltage phase with the current phase.

A VCO 13 is connected to the low-pass filter 12. The VCO 13 transmits a frequency at which the voltage phase and the current phase coincide with each other by the voltage generated by the low-pass filter 12 to the amplifier 5 to realize PLL control.

In contrast to the first conventional example, Japanese Patent Application Laid-Open No. Hei 2-265681 as a second conventional example has a switch means for switching between a reference oscillator, a feedback signal and the reference signal, and the reference oscillator has a resonance. A technique has been disclosed in which an oscillator is swept near a point and switched to a feedback signal at the moment of crossing a resonance point.

FIG. 16 shows an ultrasonic operation apparatus disclosed in Japanese Patent Application Laid-Open No. 2-265681. In the description of the second conventional example, a portion overlapping with the portion described in the first conventional example will be omitted.

A detection circuit 6 connected to the amplifier 5 detects the voltage phase signal θv and the current phase signal θi, and the impedance | z | when the handpiece 3 is driven.
Is detected. The detection circuit 6 includes a resonance point detection circuit 15.
Is connected.

A voltage phase signal θv, a current phase signal θi and an impedance | z | detected by the detection circuit 6 are transmitted to the resonance point detection circuit 15. Resonant point detection circuit 1
5 is a phase comparator for judging whether the phases match from the voltage phase signal θv and the current phase signal θi, and the impedance | z | inherent in the handpiece 3 when driven at the resonance frequency is minimized. It is composed of a minimum voltage value detecting means utilizing the characteristic of taking a value.

The control circuit 9 is connected to the output SW 10 and the reference oscillator 7. When the output ON signal is transmitted to the control circuit 9 by the output SW 10, the frequency near the resonance frequency of the handpiece 3 is swept from the high frequency to the low frequency relative to the resonance frequency and vice versa with respect to the reference oscillator 7. Is controlled.

At this time, the voltage phase signal θv, current phase signal θi and impedance | z detected by the detection circuit 6
The value of | changes. Among the changes, the resonance point detection circuit 15
It is determined that the frequency swept at is the resonance point.

At this time, the PLL control is performed by switching the switching means 8 from the reference oscillator 7 sweeping the frequency to the current phase signal θi of the detection circuit 6.

[0020]

Problems to be Solved by the Invention
In the configuration disclosed in Japanese Patent Application Laid-Open No. 5 (1999) -1995, if a certain fixed reference signal generated by the reference oscillator 7, that is, the frequency divergence between the reference frequency and the resonance frequency is large, the frequency fluctuates rapidly when switching to the current phase signal θi, ie, the feedback signal. In some cases, the drive is not stable because the PLL control that attempts to make it work works.

Therefore, in the configuration of Japanese Patent Application Laid-Open No. 2-265681, a frequency near the resonance frequency is once swept by the reference oscillator 7, and the current phase signal θi is The above problem is solved by switching to a feedback signal.

However, according to this known technique, the reference signal from the reference oscillator 7 can be made to coincide with the resonance frequency only after the output SW10 is turned on, so that it takes time until the PLL control is performed and a desired output is selected. It takes time.

This indicates a poor response after the output SW 10 is pressed, which may cause some discomfort to the surgeon and lead to a redundant operation time for the patient. May increase.

In endoscopic surgery, ultrasonic treatment tools having various treatment section shapes are prepared, and an ultrasonic vibrator and an ultrasonic transducer for actually generating ultrasonic mechanical vibration from an electric signal. The treatment tool is usually configured to be detachable by a method such as screw fastening.

Naturally, the transmission of the ultrasonic mechanical vibration from the ultrasonic transducer to the ultrasonic treatment section is performed through the screw fastening section.
If the mechanical fastening is weak, 100% of the ultrasonic mechanical vibration is not transmitted from the ultrasonic transducer to the ultrasonic treatment instrument, and the treatment efficiency of the distal end portion may be reduced.

Further, since heat and stress due to ultrasonic mechanical vibration are constantly applied to the ultrasonic treatment section, cracks may occur at one corner of the ultrasonic treatment section. This may reduce the efficiency of transmission of mechanical vibration due to the cracks, making it impossible to obtain the desired incision ability and coagulation ability in the treatment section.

In such a case, in the above-mentioned known prior art, when the operator actually performs the treatment, the operator can judge only by outputting the output with the output SW 10 for outputting the treatment output. A complicated action such as replacing the handpiece 3 as an ultrasonic surgical instrument may occur.

(Object of the Invention) The present invention has been made in view of the above-mentioned points, and detects whether or not an ultrasonic surgical instrument is in a normal use state and quickly sets an ultrasonic surgical instrument to a state in which an ultrasonic operation is performed. It is an object of the present invention to provide an ultrasonic surgical apparatus that can perform the operation.

More specifically, the ultrasonic vibrator is driven efficiently, stably and speedily, and the ultrasonic treatment instrument is detected in the case of inadequate fastening condition or possible damage in the unlikely event that the operator is in advance. It is an object of the present invention to provide an ultrasonic surgical apparatus that notifies a user such as the above and enables a safe and efficient operation.

[0030]

In an ultrasonic surgical apparatus to which a plurality of different ultrasonic surgical instruments are detachably connected, a reference signal capable of supplying a frequency-changeable reference signal to the ultrasonic surgical instrument. Generating means, a resonance point detection circuit for detecting a resonance frequency of the ultrasonic surgical instrument based on the reference signal supplied to the ultrasonic surgical instrument, and a detection result detected by the resonance point detection circuit Determining means for determining whether or not the ultrasonic surgical instrument connected thereto is usable; and storage means for storing resonance frequency information when the resonance point detection circuit detects a resonance frequency. With this arrangement, it is possible to quickly determine whether or not the connected ultrasonic surgical instrument is in a usable state based on the determination result of the determination means, and to detect the resonance frequency when the resonance frequency is detected. It can be set to a state to perform quickly ultrasonic surgical by the resonance frequency information storage means for storing the resonance frequency information.

[0031]

Embodiments of the present invention will be described below with reference to the drawings. (First Embodiment) FIGS. 1 to 5 relate to a first embodiment of the present invention, and FIG. 1 shows an overall configuration of an ultrasonic surgical apparatus according to the first embodiment of the present invention. 2 shows a configuration of the starting means, FIG. 3 shows a configuration of a control circuit and the like, FIG. 4 shows an operation content, and FIG. 5 shows a characteristic diagram for explaining the operation.

As shown in FIG. 1, an ultrasonic operation apparatus 1 according to the first embodiment of the present invention is different from the ultrasonic operation apparatus 1 'shown in FIG. 16 in that a reference oscillator 7 is further oscillated at a resonance frequency. The configuration includes a frequency storage unit 21 for storing information, a display circuit 22 for visually notifying and a sound source circuit 23 for audibly notifying as a notifying unit, and a starting unit 24 for starting operation of the control circuit 9 and the like. .

More specifically, the configuration is as follows. The ultrasonic surgical apparatus 1 includes an apparatus main body 2 and a handpiece 3 as an ultrasonic surgical instrument detachably connected to the apparatus main body 2, and an ultrasonic wave supplied from the apparatus main body 2 is supplied to the handpiece 3. It has a built-in ultrasonic transducer for converting energy into ultrasonic mechanical signals.

That is, the handpiece 3 has the reference numerals 3A, 3A
B and 3C have various shapes, and the built-in ultrasonic vibrators 16a, 16b, 1
6c has respective resonance frequencies. The resonance frequency also varies depending on the length and thickness of the probes 17a, 17b, 17c.

The drive circuit 4 constituting the apparatus main body 2 generates a signal for generating ultrasonic energy. An amplifier 5 is connected to the drive circuit 4. This amplifier 5
The power of the ultrasonic energy signal generated by the drive circuit 4 is amplified.

The detection circuit 6 is connected to the amplifier 5.
The detection circuit 6 detects the voltage phase signal θv and the current phase signal θi from the ultrasonic energy amplified by the amplifier 5, and detects the handpiece 3I (I = A, B, C,
..) Are detected.

At this time, the detected voltage phase signal θv is transmitted to the drive circuit 4. The detection circuit 6 is connected to the handpiece 3I and outputs ultrasonic energy to the handpiece 3I.
To supply.

The apparatus main body 2 is provided with a reference oscillator 7, which is an oscillator that oscillates at an ultrasonic frequency that is first driven by the drive circuit 4.

Switching means 8 is connected to the reference oscillator 7. The current phase signal θi detected by the aforementioned detection circuit 6 is applied to the contact b to the switching means 8. Further, a signal of the reference frequency oscillated from the reference oscillator 7 is applied to the contact a to the switching means 8,
At the time of driving oscillation, switching is performed so that a signal of the reference frequency input from the reference oscillator 7 is transmitted to the driving circuit 4.

A control circuit 9 is connected to a switching control terminal of the switching means 8. This control circuit 9 is connected to the reference oscillator 7 and the output SW10. Output SW10
Transmits an ON / OFF signal for driving the handpiece 3 to the control circuit 9.

The drive circuit 4 includes a phase comparator 11 for performing phase comparison, a low-pass filter 12 for passing a low-frequency signal component in an output signal of the phase comparator 11,
It comprises a VCO 13 as a voltage-controlled oscillator that oscillates at a frequency corresponding to the voltage of the low-frequency signal component passed through 2.

The voltage phase signal θv detected by the detection circuit 6 is input to one end of the phase comparator 11, and the signal of the reference frequency or the current phase signal θi input from the switching means 8 is input to the other end. And outputs a signal for setting the frequency so that the phases of both waveforms coincide with each other.

The phase comparator 11 has a low-pass filter 12
Is connected. The signal output from the phase comparator 11 is filtered through a low-frequency component to generate a voltage necessary for matching the voltage phase with the current phase.

The VCO 13 is connected to the low-pass filter 12. The VCO 13 transmits a frequency at which the voltage phase and the current phase coincide with each other by the voltage generated by the low-pass filter 12 to the amplifier 5 to realize PLL control.

A resonance point detection circuit 15 is connected to an output terminal of the detection circuit 6. The voltage phase signal θv, the current phase signal θi, and the impedance | z | detected by the detection circuit 6 are input to the resonance point detection circuit 15.

The resonance point detecting circuit 15 generates a voltage phase signal θ
A phase comparator for judging whether the phases match from v and the current phase signal θi, or a characteristic in which the impedance | z | inherent in the handpiece 3 when driving at the resonance frequency takes a minimum value is used. And a minimum voltage value detecting means. In the present embodiment, the output signal of the resonance point detection circuit 15 is input to the control circuit 9.

The control circuit 9 is connected to a frequency storing means 21 for storing frequencies, a display circuit 22 and a sound source circuit 23 as a notifying means, and a starting means 24 for starting a control start operation.

The start means 24 is connected to the handpiece 3I. When the start means 24 is turned on, an operation start signal (actually, electric power) is input to the control circuit 9 and also input to the handpiece 3I. (The drive signal is input to the ultrasonic vibrator 16i).

In this embodiment, the control circuit 9 sends the handpiece 3I to the reference oscillator 7 before the output SW 10 sends the output ON signal, that is, when the control means 9 permits the control circuit 9 to start the control. Is swept from a high resonance frequency to a low resonance frequency, or vice versa.

At this time, when the handpiece 3I is connected, the resonance frequency is determined by the resonance point detection circuit 15. The detection result by the resonance point detection circuit 15 is sent to the control circuit 9.

FIG. 2 shows the structure of the starting means 24. As shown in FIG. 2, the starting means 24 includes a commercial power source 26 and a power source switch 27.
A control start signal is transmitted to the control circuit 9 at the same time when the power of the apparatus main body 2 is turned on (power is supplied to start operation).

FIG. 3 shows a specific configuration of the reference oscillator 7, the control circuit 9, and the frequency storage means 21. Reference oscillator 7
Is composed of a VCO 7a. The control circuit 9 operates as a read-only memory storing an operation program and the like.
It comprises a CPU 28 having a built-in OM 28a, and a D / A converter 29 connected to the CPU 28 for D / A converting and outputting the digital signal. The frequency storage means 21 is constituted by a RAM 21a.

In the case of the above configuration, the digital data for oscillating at a value near the resonance frequency output from the CPU 28 is converted into analog data (voltage value) by the D / A converter 29, and VCO that constitutes
7a.

At the time of frequency sweeping, this can be realized by changing this analog data (voltage value) every moment. that time,
When the resonance point detection result from the above-described resonance point detection circuit 15 is transmitted to the control circuit 9 (CPU 28 therein), the result is transmitted to the VCO 7a constituting the reference oscillator 7 via the D / A converter 29 at that time. The stored data is stored as data to be stored in the RAM 21a as the frequency storage means 21 in parallel. That is, the CPU 28 stores (stores) the voltage data for causing the reference oscillator 7 to oscillate at the resonance frequency in the RAM 21a.

At the time of treatment output at the time of treatment by the output SW 10, the CPU 28 operates as the frequency storage means 21 in the RAM 2.
By extracting data from 1a, the VCO 7a as the reference oscillator 7 can be oscillated at the resonance frequency.

In the present embodiment, the resonance point detection circuit 1
It is determined from the detection result of 5 whether a normal resonance frequency has been detected. When a normal resonance frequency can be detected, the CPU 28 of the control circuit 9
After the reference oscillator 7 is caused to oscillate with the stored data stored in the step (a), the switching means 8 is switched to a state in which a treatment can be performed.

On the other hand, when a normal resonance frequency cannot be detected, the CPU 28 of the control circuit 9 makes a visual notification by the display circuit 22 as a notification means and an audible notification by the sound source circuit 23. .

This notification allows the operator to know that the handpiece 3I is in a state where it cannot be used normally before performing the actual operation, that is, from the power-on state.

The operation of the ultrasonic surgical apparatus 1 having such a configuration will be described. FIG. 4 shows a flow of the operation content of the present embodiment. As shown in FIG. 1, a handpiece 3I is
And the power cord (plug) of the apparatus main body 2 is connected to the commercial power supply 26.

Then, as shown in step S1, the power switch 27 of the starting means 24 is turned on. Then, power is supplied from the start means 24 (constituting the first drive start means) to the control circuit 9, and the control circuit 9 starts operating.

Next, as in step S2, the control circuit 9 controls the reference oscillator 7 to sweep the reference oscillator 7 so as to include a frequency range near the resonance frequency of the ultrasonic transducer.

In this case, the oscillation signal of the reference oscillator 7 is applied to the handpiece 3 via the drive circuit 4, the amplifier 5 and the detection circuit 6 via the contact a of the switching means 8, and the voltage detected by the detection circuit 6 at that time. The phase signal θv, the current phase signal θi, and the impedance | z | are input to the resonance point detection circuit 15. Then, the resonance point detection circuit 15 outputs a resonance point detection result to the CPU 28 of the control circuit 9.

As shown in step S3, C in the control circuit 9
The PU 28 determines whether or not there is a resonance frequency from the resonance point detection result by the resonance point detection circuit 15. C of control circuit 9
If the PU 28 determines that there is no normal resonance frequency, the display circuit 22 and the sound source circuit 2 are switched as shown in step S4.
At 3, the user is notified.

On the other hand, if it is determined in step S3 that there is a resonance frequency, the CPU 28 of the control circuit 9 stores data corresponding to the resonance frequency in the RAM 21a as the frequency storage means 21 as shown in step S5.

Thereafter, as shown in step S6 (second
When the output SW 10 is turned on (as a drive start means), the ON signal is input to the CPU 28 of the control circuit 9.

Then, as shown in step S7, the control circuit 9 extracts the resonance frequency data from the frequency storage means 21 and drives the reference oscillator 7 at the resonance frequency with the resonance frequency data. Next, as shown in step S8, the control circuit 9 switches so that the contacts a to b of the switching means 8 are turned on, and shifts to the PLL control operation near the resonance frequency.

Next, when the handpiece 3I is connected in a normal connection state, when the handpiece 3I is not connected, the ultrasonic vibrator 16i (i = a, b, c,...) and ultrasonic transducer 1
The detection operation and the like by the resonance point detection circuit 15 when the probe 17i connected to 6i is damaged or loosened will be specifically described with reference to FIG.

In FIGS. 5A, 5C and 5E, the horizontal axis represents frequency f and the vertical axis represents impedance | z |. The portion shown by the thick solid line shows the characteristics in the sweep frequency range (frequency fa to fb).

For example, in FIG. 5A, Ra indicates the characteristic of impedance | z | when sweeping from frequency fa to resonance frequency fr, and Rb indicates impedance | z | when sweeping from frequency fr to fb. The characteristics of Rc shows the characteristic of the impedance | z | at the resonance frequency (resonance point), and is minimized.

In FIG. 5C, Rc indicates the characteristic of impedance | z | when sweeping from frequency fa to the maximum frequency, Rd indicates the maximum impedance | z | portion, and Re indicates the impedance. This shows the characteristics of impedance | z | when sweeping from the frequency at which | z | is maximized to fb. In this case, the frequency fc at which the impedance | z | is minimum is outside fb. Further, in FIG. 5E, the frequency fa to the resonance frequency f
The characteristic shows that the impedance | z | is minimized at a plurality of frequencies fd, fr, and fe when sweeping to b.

The frequency characteristic (impedance | z | with respect to frequency) of the handpiece 3I near the resonance frequency in a normal state is as shown in FIG. When sweeping from the frequency fa lower than the resonance frequency fr, the voltage phase signal θv and the current phase signal θi have a relationship as shown in FIG. That is, the frequency range Ra from the frequency fa to fr
In the frequency range Rb from the frequency fr to the frequency fb, the phases of the voltage phase signal θv and the current phase signal θi are shifted.

In the resonance frequency range Rc, the resonance frequency fr
, The output signal of the resonance point detection circuit 15 is inverted from “H” to “L” immediately before the voltage phase signal θv advances from the current phase signal θi.

The above signal is transmitted to the CPU 28 of the control circuit 9. The data sent for sweeping to the reference oscillator 7 at that moment is, in other words, digital data of a voltage oscillated at the resonance frequency, and the data is the CPU 2 of the control circuit 9.
8 to the RAM 21a of the frequency storage means 21 for storage.

When actually outputting, the output SW 10
When the output ON signal is transmitted to the CPU 28 of the control circuit 9, the control is performed so that the VCO 7a of the reference oscillator 7 is driven by the resonance frequency data obtained by sweeping the frequency from the RAM 21a of the frequency storage means 21. The switching means 8 is switched to the contact b side to perform PLL control.

If the handpiece 3I is not connected during the above series of control operations, there is no load of impedance | z | as shown in FIG. Even if the frequency is swept in the range, the resonance frequency fr cannot be obtained by the resonance point detection circuit 15.

At that time, the information is transmitted to the CPU 28 of the control circuit 9, and the CPU 28 of the control circuit 9
2 and a sound source circuit 23 to visually and aurally notify a user such as an operator.

In the case where the ultrasonic vibrator 16i built in the handpiece 3I and the probe 17i connected to the ultrasonic vibrator 16i are damaged or loosened, FIG. 5C and FIG. It should have impedance characteristics as shown in (E).

In the case of FIG. 5C, when the sweep is performed according to the flow described in FIG. 4, the resonance frequency fr is not found, and the voltage phase signal θv and the current phase signal θi as shown in FIG. At a frequency different from fr, the output of the resonance point detection circuit 15 inverts from "L" to "H" at the position where the impedance | z | peaks (in a normal case, as shown in FIG. 5B). (Inverts from "H" to "L" when passing the resonance frequency fr.)

The CPU 28 of the control circuit 9 to which the signal of the resonance point detection circuit 15 has been transmitted determines that the connected handpiece 3I does not have a resonance frequency within a desired frequency range, and the display circuit 22 And the sound source circuit 23 visually and audibly notifies the user.

Further, when FIG. 5 (E) is swept according to the above flow, the operation becomes such that there are many resonance frequencies.
That is, in this case, as shown in FIG. 5F, the output of the resonance point detection circuit 15 is repeatedly inverted from "L" to "H" or "L".

The CPU 28 of the control circuit 9, to which the detection result from the resonance point detection circuit 15 is transmitted, operates the connected handpiece 3I so that the resonance frequency fr does not exist within the desired frequency range and that the handpiece 3I operates normally. It is determined that the sound signal cannot be output,
The user is notified visually and audibly by a speaker or a buzzer sound of a buzzer.

Accordingly, the power switch 27 is turned on (before the operator or the surgical assistant) before the operator actually performs the treatment.
Such a result can be obtained immediately after the above. For this reason, in a normal state, the treatment can be smoothly performed.

Further, even in the case where the state is not normal, it is possible to know that this state is present before the state in which the treatment is performed, and to proceed to the operation of quickly setting the state to the normal state. .

For example, in response to the notification that the handpiece is not normal, the connected handpiece 3I is exchanged, the state of the screwed portion is corrected, etc.
It is easy to set the connection state of I smoothly and promptly.

Therefore, according to the present embodiment, it is possible to set the ultrasonic diagnostic apparatus 1 to a state in which a treatment for treatment can be performed smoothly and quickly with a simple configuration.

Further, according to the present embodiment, when the power is turned on, the vicinity of the resonance frequency of the handpiece 3I is swept in advance to search for the resonance frequency and the data is held, thereby actually driving the handpiece 3I. Can be driven with the resonance frequency as the reference frequency, so that the response at the time of driving the handpiece can be improved, and the probe 17i and the ultrasonic vibrator 16i in the handpiece 3I having no resonance frequency or having a resonance frequency can be fastened. If the situation is bad, or if the ultrasonic vibrator 16i or the probe 17i is damaged by any chance, the user can be immediately notified of the condition, the complexity of the user is reduced, and the patient is operated during and after the operation. The burden may be reduced.

The control circuit 9 comprises a CPU 28, a D / A converter 29, and a frequency storage means 21 with a RAM 21a.
Since the complexity of adjustment and the like can be solved by a program, development is easy.

(Second Embodiment) Next, a second embodiment of the present invention will be described with reference to FIG. FIG. 6 shows a configuration around the frequency storage means 21 according to the second embodiment of the present invention. In the present embodiment, for example, the frequency storage unit 21 of the first embodiment is not the RAM 21a but the second D / D
The input terminal is connected to the CPU 28, and the output terminal is connected to the VCO 7a.

In the present embodiment, when the detection result of the resonance point detection circuit 15 is input to the CPU 28, the CPU 28 detects the resonance frequency, and the first D / A converter 2
9 is transmitted to the second D / A converter 21b which is the frequency storage means 21.

At the time of output by the output SW 10, the VCO 7 a constituting the reference oscillator 7 oscillates at the resonance frequency by selecting the second D / A converter 21 b, which is the frequency storage means 21, by the CPU 28 of the control circuit 9. Voltage value can be output.

The other configuration is the same as that of the first embodiment.

In the present embodiment, in the first embodiment, the frequency storage means 21 is stored in the expensive RAM 21a from the expensive RAM 21a.
There is an effect that it can be constituted by relatively inexpensive means such as the / A converter 21b.

Further, an operation program that shares the frequency sweep data up to the resonance frequency with the first D / A converter 29 may be adopted, so that the program configuration can be simplified. Others have substantially the same effects as the first embodiment.

(Third Embodiment) Next, a third embodiment of the present invention will be described with reference to FIG. FIG. 7 shows a configuration around the control circuit 9 according to the third embodiment of the present invention. In the present embodiment, the control circuit 9 includes the voltage varying unit 3.
1, first switching means 32, second switching means 33
It consists of. The frequency storage means 21 is constituted by a voltage storage circuit 21c.

The voltage varying means 31 is connected to the starting means 24 and is connected to the reference oscillator 7 via the first switching means 32.
Is applied to the VCO 7a, which oscillates at a frequency in the vicinity including the resonance frequency. At the same time, this voltage is supplied to the voltage storage means 21 via the second switching means 33.
c.

When the resonance frequency is detected as a result of the resonance point detection circuit 15, the second switching means 33 is closed by the output of the resonance point detection circuit 15, and the VCO 7a, which is the reference oscillator 7, is closed at that time. The applied voltage value is stored in the voltage storage unit 21c.

When the output ON operation is performed by the output SW 10, the first switching means 32 is operated so that the voltage of the voltage storage means 21 c which is the frequency storage means 21 is applied to the VCO 7 a which is the reference oscillator 7. The switching is performed by the output SW10, and the VCO 7a can oscillate at the resonance frequency. Other configurations are the same as those of the first embodiment.

In the present embodiment, the control circuit 9 and the frequency storage means 21 in the first embodiment are replaced by an expensive CPU.
28, the RAM 21a, and the D / A converter 29. The other effects are almost the same as those of the first embodiment.

(Fourth Embodiment) Next, a fourth embodiment of the present invention will be described with reference to FIG. FIG. 8 shows a configuration around a control circuit 9 according to the fourth embodiment of the present invention. This embodiment corresponds to a configuration of a modified example of the first embodiment.

The reference oscillator 7 is constituted by a DDS (direct digital synthesizer) 7b. Control circuit 9
Is composed of a CPU 28 having a built-in ROM 28a. The frequency storage means 21 is constituted by a RAM 21a.

In the case of the above configuration, the digital data output from the CPU 28 and having a value near the resonance frequency is directly input to the DDS 7b as the reference oscillator 7. At the time of frequency sweep, this can be realized by digital data changing every moment.

At this time, when the resonance point detection result from the resonance point detection circuit 15 described above is transmitted to the CPU 28 of the control circuit 9, the digital data transmitted at that time is transferred to the RAM 21a as the frequency storage means 21. save. At the time of output by the output SW 10, the CPU 28 extracts data from the RAM 21 a as the frequency storage means 21, so that the DDS 7 b as the reference oscillator 7 can oscillate at the resonance frequency.

FIG. 9 shows a case where the impedance | z | is input to the resonance point detection circuit 15. The resonance point detection circuit 15 includes a variable reference voltage means 35 and a comparator 36. FIG. 10 shows the variable reference voltage 35, the input impedance | z |
It can be seen that the same result as in the case where the resonance point detection circuit 15 is constituted by a phase comparator can be obtained.

FIGS. 10A, 10C, and 10E are substantially the same as FIGS. 5A, 5C, and 5E. When such characteristics are exhibited, the variable reference voltage means is used. 35, a reference voltage is set, and the reference voltage is compared with a voltage that changes with the impedance | z |
6A, 10 (A), (C),
In the case of (E), FIGS. 10 (B), (D),
It is possible to obtain a detection output as shown in FIG.

That is, in a normal case, as shown in FIG. 10B, a detection signal that changes from the "L" level to the "H" level in a pulse manner at the resonance frequency fr is obtained. In contrast,
In an abnormal state, it is always “L” as shown in FIG.
Level, and a pulse-like detection signal that goes to the “H” level cannot be obtained, or a plurality of pulse-like detection signals that go to the “H” level are detected as shown in FIG. It can be distinguished from the normal state. In the present embodiment, in addition to the third embodiment, analog control is eliminated from the variable oscillator (reference oscillator 7), so that more accurate control can be performed, and temperature characteristics, component variations, and the like. Since the element due to is eliminated, a more stable effect can be achieved. Otherwise, substantially the same effects as in the first embodiment can be obtained.

(Fifth Embodiment) Next, a fifth embodiment of the present invention will be described with reference to FIG. The ultrasonic operation apparatus 1 shown in FIG. 11 is different from the ultrasonic operation apparatus 1 in FIG.
The VCO 12 constituting the drive circuit 4 is replaced by a variable oscillator, more specifically, a DDS (Direct Digital Synthesizer) 37. This DDS 37 is connected to the control circuit 9.

In the ultrasonic surgical apparatus 1 shown in FIG.
The configuration is such that the reference oscillator 7 and the switching means 8 are deleted. Then, the voltage phase signal θv and the current phase signal θi of the detection circuit 6 are input to the resonance point detection circuit 15 and also to the phase comparator 13.

The output of the phase comparator 13 is input to the low-pass filter 11 and also to the control circuit 9. Other configurations are the same as those of the first embodiment.

First, before the output ON signal of the output SW 10 is transmitted, the control circuit 9 sends a DDS3 as a variable oscillator.
7, the frequency near the resonance frequency is shifted from a high frequency to a low frequency or vice versa.
The digital data is transmitted as if sweeping.

At this time, the voltage phase signal θv and the current signal θi detected by the detection circuit 6 are transmitted to the phase comparator 13 and the resonance point detection circuit 15. When the frequency oscillated by the DDS 37 as the variable oscillator is the resonance frequency as a result obtained by the resonance point detection circuit 15, the digital data transmitted to the DDS 37 at that time is stored in the frequency storage unit 21. Let me save.

Thereafter, the control and operation when the output is turned on by the output SW 10 and when the resonance frequency is not detected by the resonance point detection circuit 15 are the same as those in the first embodiment. In the present embodiment, in addition to the fourth embodiment, the reference oscillator 7 and the variable oscillator of the drive circuit 4 are shared by the DDS 37 with respect to the configuration. Since it is not necessary, there is an effect that the cost can be reduced. Otherwise, substantially the same effects as in the first embodiment can be obtained.

Further, in the present embodiment, a configuration of a modified example in which the resonance point detecting circuit 15 is omitted may be adopted. That is, since the output result of the phase comparator 13 is also transmitted to the control circuit 9, this is the case in the first embodiment in which the resonance point detection circuit 15 is a phase comparator. It is obvious that the same operation and effect can be obtained by transmitting the result of the detector 13 directly to the control circuit 9.
This shows that the resonance point detection circuit 15 at that time can be deleted as a configuration.

Further, in this modification, in addition to the third embodiment, the resonance frequency detection performed by the resonance point detection circuit 15 is shared with the phase comparator 13 constituting the drive circuit 4, so that Since the resonance point detection circuit 15 can be separately reduced, there is an effect that the cost can be further reduced. Otherwise, substantially the same effects as in the first embodiment can be obtained.

(Sixth Embodiment) FIG. 12 shows the configuration of the starting means 24 according to a seventh embodiment of the present invention.
In the present embodiment, the start means 24 is constituted by the button means 30. The control circuit 9 and the like are supplied with power required for operation by turning on a power switch from a commercial power supply. Other configurations are the same as those in the first embodiment, for example.

In the present embodiment, after the power switch is turned on, the user presses the button means 30 after completing the connection preparation, and the signal is transmitted to the control circuit 9 to start operations such as resonance point detection. .

In the above-described embodiment, when the power switch is turned on in a state where the handpiece 3 is not connected to the apparatus main body 2, a notification that the connection state is not normal is performed. Therefore, in the present embodiment, when the connection or the like is terminated and the user wants to start the operation of resonance point detection, the user can operate the button means 30 to perform the operation.

In this embodiment, in addition to the first and fifth embodiments, since the control is started by the user's intention without performing the control from the time of turning on the power, careless control is performed. And does not notify the user.

In other words, according to the present embodiment, the operation can be started when it is desired to perform the resonance point detection. The other effects are the same as those of the first embodiment.

(Seventh Embodiment) FIG. 13 shows the configuration of the starting means 24 in an eighth embodiment of the present invention. In the present embodiment, the starting means 24 is constituted by an inverting circuit 31 for inverting and outputting an input signal. The output ON / OFF signal of the output SW 10 is input to the control circuit 9 and also to the inversion circuit 31 constituting the starting means 24.

That is, while the output is not turned on by the output SW 10, the control start signal is transmitted to the control circuit 9,
Control with the above configuration may be started.

In this embodiment, in addition to the sixth embodiment, since the resonance frequency is always swept while the output is not performed, the resonance frequency immediately before the output and the handpiece 3I There is an effect that the states of the ultrasonic transducer 16i and the probe 17i can be monitored.

(Eighth Embodiment) FIG. 14 shows a configuration of the starting means 24 according to a ninth embodiment of the present invention. In the present embodiment, the starting means 24 is constituted by a handpiece connection detecting means 32 for confirming the connection of the handpiece 3 (3A in FIG. 14). The control circuit 9 performs a control operation such as resonance point detection based on a handpiece connection detection signal. That is, when the handpiece 3 is connected to the apparatus main body 2, the control according to the above configuration is started. Others are the same as in the first embodiment.

According to the present embodiment, if the operation of the resonance point detection is performed when the handpiece 3 is not connected, the notification of an error is performed. In this case, the resonance point detection is not performed. Do not operate.

In this embodiment, since it is confirmed that the handpiece 3I is connected, it is a logic as to whether or not there is a resonance point as a criterion, and the program can be further simplified. The other effects are the same as those of the first embodiment. It should be noted that embodiments and the like configured by partially combining the above-described embodiments and the like also belong to the present invention.

[Supplementary Notes] An ultrasonic oscillator driving oscillator for driving the ultrasonic oscillator, and feedback means for feeding back a driving signal supplied from the ultrasonic oscillator driving oscillator to the ultrasonic oscillator, wherein the feedback means By controlling the ultrasonic transducer drive oscillator according to the feedback signal from the feedback means from,
A driving device for an ultrasonic vibrator for driving the ultrasonic vibrator at a resonance point thereof, wherein a reference signal generating means for generating a reference signal whose frequency changes, and a reference signal from the reference signal generating means, Signal drive means for switching one of the feedback signals and supplying the feedback signal to the phase comparator; first drive start means for starting the drive of the reference signal generation means; and the ultrasonic wave based on the feedback signal. Resonance point detection means for detecting whether the drive frequency of the transducer is substantially equal to the resonance frequency of the ultrasonic transducer, and the resonance obtained by feedback from the reference generation means driven by the drive start means Frequency holding means for holding frequency information corresponding to a resonance point at a frequency from the reference signal generating means based on the detection result of the point detecting means; Ri and second drive start means for driving the reference generating means at the resonance frequency, ultrasonic surgical apparatus characterized by comprising notification means for performing notification by the results of the resonance point detecting means.

1-1. 2. The ultrasonic surgical apparatus according to claim 1, wherein the reference signal generating means for generating the reference signal whose frequency changes is a voltage controlled oscillator. 1-2. 2. The ultrasonic surgical apparatus according to claim 1, wherein the control means for changing the frequency of the reference signal generating means comprises a microprocessor means and a digital-to-analog converting means. 1-3. The control means for changing the frequency of the reference signal generating means comprises an opening / closing means for opening and closing the variable voltage means and the frequency storage means, and a switching means for switching between the variable voltage means and the frequency storage means by a second drive start means. 2. The ultrasonic surgical apparatus according to claim 1, wherein 1-4. 2. The ultrasonic surgical apparatus according to claim 1, wherein the frequency storage unit that holds the frequency information corresponding to the resonance point is a digital-to-analog conversion unit.

1-5. 2. The ultrasonic surgical apparatus according to claim 1, wherein the frequency storage unit that stores the frequency information corresponding to the resonance point is a memory unit. 1-6. 2. The ultrasonic surgical apparatus according to claim 1, wherein the frequency storage unit that stores the frequency information corresponding to the resonance point is a voltage storage unit. 1-7. 2. The ultrasonic surgical apparatus according to claim 1, wherein the reference signal generating means for generating the reference signal whose frequency changes is a digital synthesizer means.

1-8. 2. The ultrasonic surgical apparatus according to claim 1, wherein the first drive start means is a switch means that can be turned on / off by a user operation. 1-9. 2. The ultrasonic operation apparatus according to claim 1, wherein the first drive start means is logic means for assuming a result obtained by inverting a logic for driving by the second drive start means. 1-10. 2. The ultrasonic surgical apparatus according to claim 1, wherein the first drive start means is connection determination means for determining whether connection with the ultrasonic transducer to be driven is appropriate.

[0129] 2. In an ultrasonic surgical apparatus to which a plurality of different ultrasonic surgical instruments are detachably connected, reference signal generating means capable of supplying a reference signal having a frequency that changes to the ultrasonic surgical instrument, and the ultrasonic surgical instrument A resonance point detection circuit for detecting a resonance frequency of the ultrasonic surgical instrument based on the reference signal supplied to the ultrasonic surgical instrument, and an ultrasonic surgical instrument connected from a detection result detected by the resonance point detection circuit. A determination means for determining whether or not is in a usable state, and a storage means for storing resonance frequency information when the resonance point detection circuit detects a resonance frequency, Ultrasonic surgery equipment.

2-1. The ultrasonic surgical apparatus according to claim 2, further comprising a drive circuit that drives the ultrasonic surgical instrument based on the resonance frequency information stored in the storage unit. 2-2. 3. The ultrasonic surgical apparatus according to claim 2, further comprising: resonance point information notifying means for notifying the resonance point information based on the detection result of the resonance point detection circuit.

2-3. 3. The ultrasonic surgical apparatus according to claim 2, wherein the reference signal generating unit is a voltage-controlled oscillating unit whose oscillation frequency changes with an applied voltage. 2-4. 3. The ultrasonic operation according to claim 2, wherein when the resonance frequency is detected when the frequency oscillated by the reference signal generation unit is changed, information corresponding to the resonance frequency is stored in the storage unit. apparatus. 2-5. 3. The ultrasonic surgical apparatus according to claim 2, wherein the storage unit is a memory unit.

2-6. 3. The ultrasonic surgical apparatus according to claim 2, wherein the storage unit is a voltage holding unit. 2-7. 3. The ultrasonic surgical apparatus according to claim 2, wherein the reference signal generating unit is a digital synthesizer unit. 2-8. 3. The ultrasonic surgical apparatus according to claim 2, further comprising a first drive start unit that starts operation of the determination unit and the like. 2-9. The ultrasonic surgical apparatus according to attachment 2-8, wherein the first drive start means is a power switch for supplying operation power to a determination means or the like or a SW means that can be turned on / off by a user operation.

2-10. 3. The apparatus according to claim 2, further comprising a second drive start means for generating the reference signal generating means based on the resonance frequency information stored in the storage means and applying a drive signal of the resonance frequency to the ultrasonic surgical instrument. Ultrasound surgery device. 2-11. The ultrasonic surgical apparatus according to Supplementary Note 2-2, wherein the resonance point information notification means visually or audibly notifies when the determination means determines that the ultrasonic surgical instrument is not in a usable state. 2-12. 3. The ultrasonic operation according to claim 2, wherein the ultrasonic instrument includes an ultrasonic oscillator that generates ultrasonic vibration, and a handpiece including a probe that transmits the ultrasonic vibration from the ultrasonic oscillator to a treatment unit. apparatus.

[0134]

As described above, according to the present invention, in an ultrasonic surgical apparatus to which a plurality of different ultrasonic surgical instruments are detachably connected, a reference whose frequency changes with respect to the ultrasonic surgical instruments is provided. Reference signal generating means capable of supplying a signal, a resonance point detection circuit for detecting a resonance frequency of the ultrasonic surgical instrument based on the reference signal supplied to the ultrasonic surgical instrument, and the resonance point detection Determining means for determining whether or not the connected ultrasonic surgical instrument is in a usable state from the detection result detected by the circuit; and, when the resonance point detection circuit detects a resonance frequency, Storage means for storing frequency information,
It is possible to quickly determine whether or not the connected ultrasonic surgical instrument is in a usable state based on the determination result of the determination unit, and when the resonance frequency is detected, the storage unit that stores the resonance frequency information is used. A state in which ultrasonic surgery is performed quickly can be set based on the resonance frequency information.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an overall configuration of an ultrasonic surgical apparatus according to a first embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration of a starting unit.

FIG. 3 is a block diagram illustrating a configuration of a control circuit and the like.

FIG. 4 is a flowchart showing operation contents.

FIG. 5 is a diagram showing characteristics and detection signals for explaining operation.

FIG. 6 is a block diagram showing a configuration around a control circuit according to a second embodiment of the present invention.

FIG. 7 is a block diagram showing a configuration around a control circuit according to a third embodiment of the present invention.

FIG. 8 is a block diagram showing a configuration around a control circuit according to a fourth embodiment of the present invention.

FIG. 9 is a diagram illustrating a configuration of a resonance point detection circuit.

FIG. 10 is a diagram showing characteristics and detection signals for explaining the operation;

FIG. 11 is a block diagram showing an overall configuration of an ultrasonic surgical apparatus according to a fifth embodiment of the present invention.

FIG. 12 is a diagram showing a configuration of a starting unit according to a sixth embodiment of the present invention.

FIG. 13 is a diagram showing a configuration of a starting unit according to a seventh embodiment of the present invention.

FIG. 14 is a diagram illustrating a configuration of a starting unit according to an eighth embodiment of the present invention.

FIG. 15 is a block diagram showing a configuration of a first conventional example.

FIG. 16 is a block diagram showing a configuration of a second conventional example.

[Description of Signs] 1 ... Ultrasonic surgery apparatus 2 ... Device main body 3 ... Handpiece 4 ... Drive circuit 5 ... Amplifier 6 ... Detection circuit 7 ... Reference oscillator 7a ... VCO 8 ... Switching means 9 ... Control circuit 10 ... Output SW 11 ... Phase comparator 12 ... Low-pass filter 13 ... VCO 15 ... Resonant point detection circuit 21 ... Frequency storage means 21a ... RAM 22 ... Display circuit 23 ... Sound source circuit 24 ... Starting means 16a, 16b ... Ultrasonic transducer 17a, 17b ... Probe 28 ... CPU 29 ... D / A converter

Claims (3)

[Claims] 1. An ultrasonic surgical apparatus to which a plurality of different ultrasonic surgical instruments are detachably connected, reference signal generating means capable of supplying a reference signal having a variable frequency to the ultrasonic surgical instruments, Based on the reference signal supplied to the ultrasonic surgical instrument, a resonance point detection circuit that detects a resonance frequency of the ultrasonic surgical instrument, and connected from a detection result detected by the resonance point detection circuit. Determining means for determining whether the ultrasonic surgical instrument is in a usable state, and when the resonance point detection circuit detects a resonance frequency,
And a storage means for storing the resonance frequency information. 2. The ultrasonic surgical apparatus according to claim 1, further comprising a drive circuit that drives the ultrasonic surgical instrument based on the resonance frequency information stored in the storage unit. 3. The ultrasonic surgical apparatus according to claim 1, further comprising resonance point information notifying means for notifying the resonance point information based on a detection result of the resonance point detection circuit.