JPH08336545A - Ultrasonic operation apparatus - Google Patents

Ultrasonic operation apparatus

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Publication number
JPH08336545A
JPH08336545A JP7169333A JP16933395A JPH08336545A JP H08336545 A JPH08336545 A JP H08336545A JP 7169333 A JP7169333 A JP 7169333A JP 16933395 A JP16933395 A JP 16933395A JP H08336545 A JPH08336545 A JP H08336545A
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circuit
ultrasonic
frequency
horn
vibration
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JP4219418B2 (en
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Yuichiro Sato
裕一郎 佐藤
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Miwa Tec:Kk
株式会社ミワテック
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Abstract

PURPOSE: To assure the safety to an operator and a patient by detecting the occurrence of a fault in the cooling mechanisms and other constituting parts of a handpiece section, in the event of such occurrence, and dropping or stopping the output of an ultrasonic oscillation circuit.
CONSTITUTION: The handpiece part M of this ultrasonic operation apparatus converts the high-frequency electric power outputted from the ultrasonic oscillation circuit E to the mechanical vibration energy of the knife part of a horn 4 and has a cooling mechanism using a physiological salt soln. for cooling an electrostrictive type vibrator. The natural oscillation frequency of a vibration system eventually decreases as well when the function of the cooling mechanism stops and the temp. of the electrostrictive type vibrator and the horn 4 rises. The natural vibration frequency is detected by a frequency detecting circuit 30 in a control section (e) and a discrimination signal indicating the abnormality is outputted from a discrimination circuit 31 when this detected frequency exceeds a set frequency range. As a result, the output of a stabilizing power source circuit 23 is set at the amplitude level lower than the amplitude level thus far by an amplitude level setting circuit 32.
COPYRIGHT: (C)1996,JPO

Description

【発明の詳細な説明】 DETAILED DESCRIPTION OF THE INVENTION

【0001】 [0001]

【産業上の利用分野】この発明は、超音波振動を発生するメス部によって生体組織の破砕・切断などを行うようにした超音波手術装置に関する。 BACKGROUND OF THE INVENTION This invention relates to an ultrasonic surgical apparatus that performs such crushing and cutting of body tissue by the female part for generating ultrasonic vibrations.

【0002】 [0002]

【従来の技術】現在、外科手術などにおいては、ステンレス刃や鋼刃等を形成した通常のメスの他に、超音波振動によって手術部位の破砕・切断を行う、いわゆる超音波メスが使用されている。 Presently, in such surgery, in addition to the normal female forming a stainless blade and steel blade or the like, and the crushing and cutting of the surgical site by ultrasonic vibration, so-called ultrasonic scalpel is used there.

【0003】この超音波メスは、超音波発振回路によって高周波を発生させ、その高周波電力を図3に示すようなハンドピース部1によりメス部3aの機械的超音波振動に変換するものとなっている。 [0003] The ultrasonic scalpel generates a high frequency by the ultrasonic oscillator, so as to convert the high-frequency power by the handpiece unit 1 as shown in FIG. 3 the mechanical ultrasonic vibration of the female portion 3a there. すなわち、図示のハンドピース部1には、その外郭をなす管状部材2内に図4 That is, the hand piece unit 1 shown, FIG. 4 to the tubular member 2 constituting the outer shell
に示すような電歪型振動子3が内蔵され、これが管状部材2から突出するホーン4に固定された構成となっている。 A built-in electrostrictive vibrator 3 as shown in, which has a structure that is fixed to the horn 4 projecting from the tubular member 2. この電歪型振動子3は、電歪素子3aとその両端に取り付けた金属製の裏打ち板3b及び前面板3cとにより構成されており、図外の超音波発振回路から供給された高周波電力は、この電歪型振動子3で機械的振動に変換され、その機械的振動はメス部であるホーン4の先端部4aに伝達される。 The electrostrictive vibrator 3 is configured by electrostrictive element 3a and a metal backing plate 3b and a front plate 3c attached to both ends, the high-frequency power supplied from the ultrasonic oscillation circuit outside the figure the electrostrictive vibrator 3 is converted to mechanical vibrations, the mechanical vibrations are transmitted to the distal end 4a of the horn 4 is a female portion.

【0004】また、ホーンの先端部4a近傍にはイリゲーションパイプ5が配設されており、ここから手術部位に対して洗浄用の生理食塩水などが供給される一方、手術部位に発生した血液や洗浄水などをホーン4の中心に形成された吸引孔4bから吸引し、吸引パイプ6を介して排出されるようになっている。 Further, in the vicinity of the distal end portion 4a of the horn is disposed the irrigation pipe 5, while such as physiological saline for washing against the surgical site from which is supplied blood Ya generated at the surgical site and washing water sucked from the suction hole 4b formed in the center of the horn 4, and is discharged through a suction pipe 6.

【0005】ところで、上記のような超音波振動装置に用いられる電歪型振動子3にあっては、電気振動を機械振動に変換する際に生じる電気的ロスによって熱が発生し、これがホーン4の異常発熱や電歪素子3aの寿命低下を招くため、一般には電歪型振動子3及びメス部(ホーンの先端部)4aに対して冷却処理を施す必要がある。 [0005] In the electrostrictive vibrator 3 for use in the ultrasonic vibration device as described above, heat is generated by electrical losses caused by transforming an electrical vibration into mechanical vibration, which horn 4 because it causes the reduction in the life of the abnormal heat generation or electrostrictive elements 3a, generally it is necessary to perform cooling processing for 4a (distal portion of the horn) electrostrictive vibrator 3 and the female part. この冷却処理方法としては、電歪素子3a及びホーン4に対して冷却水などを供給することが従来より行われているが、この場合には冷却水の供給機構を付設することによりハンドピース1が大型化するため、現在では、図5に示すように、電歪型振動子3の中央部にホーン4の吸引孔4bと連通する吸引経路3dを形成し、ここに吸引孔4bから吸引した生理食塩水を通過させることによって電歪型振動子3を冷却するという冷却処理構造も提案・実施されている。 As the cooling treatment method, although it has been conventionally performed to supply such coolant against electrostrictive elements 3a and the horn 4, the handpiece 1 by attaching a supply mechanism of the cooling water in this case There to large, at present, as shown in FIG. 5, the suction path 3d communicating with the suction hole 4b of the horn 4 in the central portion of the electrostriction type transducer 3 is formed, it sucked from the suction hole 4b here cooling processing structure has also been proposed and implemented that cools the electrostrictive vibrator 3 by passing saline.

【0006】 [0006]

【発明が解決しようとする課題】このように、現在の超音波手術装置では電歪型振動子3やホーン4に対して冷却処理を施すようになっているが、冷却処理機構に何等かの故障、例えば、イリゲーションパイプ5が詰まることによる冷却水の供給停止、ホーン4や吸引経路3dが詰まることによる吸引動作の停止などが発生した場合には、電歪型振動子3やホーン4が高温化してしまい、患者や手術者が火傷するとか、ホーン4や電歪素子3a等が熱によって破損されるといった問題が生じる。 BRIEF Problem to be Solved] Thus, although the current ultrasonic surgical device is adapted to apply a cooling process on the electrostrictive vibrator 3 and the horn 4, what like of the cooling processing mechanism failure, for example, stop of the supply of cooling water due to irrigation pipe 5 is clogged, when such stop of the suction operation by the horn 4 and the suction passage 3d is clogged occurs, electrostrictive vibrator 3 and the horn 4 is a high temperature turned into and will, Toka patient and operator are burned, a problem horn 4 and electrostrictive element 3a and the like are damaged by heat.

【0007】この発明は上記従来技術の課題に着目してなされたもので、ハンドピース部の異常加熱等の発生を防止することができる安全性及び耐久性に優れた超音波メスの提供を目的とする。 An object of this invention is the one that has been made in view of the prior art problems, providing an ultrasonic knife having excellent safety and durability can be prevented the occurrence of abnormality such as heating of the handpiece portion to.

【0008】 [0008]

【課題を解決するための手段】この発明は、超音波発振回路の出力に応じてメス部に機械的超音波振動を発生させるハンドピース部と、このハンドピース部における電歪型振動子とホーンとからなる振動系を冷却する冷却機構と、前記振動系の振動周波数を検出する周波数検出回路と、前記周波数検出回路によって検出された周波数が所定の周波数範囲外であるとき判別信号を出力する判別回路と、前記判別回路に接続され判別信号の受信時に超音波発振回路の出力を低減または遮断する出力制御回路とを備えたものである。 SUMMARY OF THE INVENTION This invention includes a handpiece unit which generates a mechanical ultrasonic vibration to the female part in accordance with the output of the ultrasonic oscillator, and the electrostrictive vibrator in the handpiece portion horn a cooling mechanism for cooling the vibration system consisting of a frequency detecting circuit for detecting the vibration frequency of the vibration system, determine said frequency detection circuit frequency detected by outputs a determination signal when it is outside the predetermined frequency range circuit and is obtained by an output control circuit that reduces or blocks the output of the ultrasonic oscillation circuit upon receipt of the discrimination circuit connected to the determination signal.

【0009】また、上記判別回路からの判別信号受信時に告知手段を駆動して警告を手術者等に発するようにしても良く、この場合の告知手段としては音声発生装置や表示器などを用いることが考えられる。 [0009] may be issued a warning by driving the notification means when the discrimination signal received from the determination circuit to the operator or the like, be used as the sound generation device and indicator as notifying means in this case It can be considered.

【0010】 [0010]

【作用】上記構成において、冷却機構の動作が何等かの原因によって停止すると、振動系の温度は上昇し始めるが、この発明では、温度変化に伴って振動系の固有振動数が変化することに着目し、振動系の周波数を周波数検出回路によって検出し、その検出周波数が予め設定した適正周波数範囲外であるときには、判別回路から判別信号を出力し、その判別信号に応じて出力制御回路手段が超音波発振回路の出力を低減または遮断する。 [Action] In the above structure, when the operation of the cooling mechanism is stopped by the cause of any incident, the temperature of the oscillating system begins to rise, in this invention, to vary the natural frequency of the vibration system in accordance with the temperature change interest, and the frequency of the vibration system detected by the frequency detection circuit, when the detected frequency is out of the proper frequency range set in advance, and outputs a discrimination signal from the discrimination circuit, the output control circuit means in response to the discrimination signal to reduce or shut off the output of the ultrasonic oscillator. これにより、振動系及びホーンにおける発熱は抑えられ、これらが異常に加熱されることはなくなる。 Thus, heat generation is suppressed in the vibration system and the horn ceases to that they are abnormally heated.

【0011】また、判別回路から出力された異常を表す判別信号によって音声発生装置や表示器等の告知手段を作動させるようにすれば、手術者等に装置の使用停止を促すことができ、事故の発生を未然に防ぐことができる。 Further, if the discrimination signal representative of the output from the determination circuit fault to actuate a notification means such as a sound generation device and a display device, it is possible to prompt the deactivation of the device to the surgeon or the like, an accident the occurrence can be prevented.

【0012】 [0012]

【実施例】次に、この発明の一実施例を図1及び図2に基づき説明する。 BRIEF DESCRIPTION OF basis of an embodiment of the present invention in FIGS. この実施例における超音波手術装置としては、図1に示すように、高周波電力を発生させる超音波発振回路Eと、この超音波発振回路Eから出力された高周波電力をメス部の機械的振動エネルギーに変換するハンドピース部Mとからなり、ハンドピース部Mは上記従来技術に示したものと同様に、管体2,電歪型振動子3,ホーン4及びイリゲーションパイプ6等を備えたものとなっている。 The ultrasonic surgical apparatus in this embodiment, as shown in FIG. 1, an ultrasonic oscillator E for generating a high-frequency power, mechanical vibration energy of the female part of the high-frequency power output from the ultrasonic oscillator E It consists of a handpiece portion M to be converted to, handpiece unit M is similar to that shown in the prior art, the tubular body 2, electrostrictive vibrator 3, and those with horns 4 and irrigation pipes 6 or the like going on. 但し、ここに用いる電歪型振動子3 However, electrostrictive vibrator 3 used here
は、図4に示すように内部に吸引孔4bを形成したものを用いている。 It is used after forming the suction hole 4b inside as shown in FIG. 従って、この実施例におけるホーン及び電歪型振動子3に対する冷却機構は、生理食塩水を供給するイリゲーションパイプ6と、ホーン4の吸引孔4b Thus, the cooling mechanism for the horn and the electrostrictive vibrator 3 in this embodiment, the irrigation pipe 6 for supplying a physiological saline, the suction hole 4b of the horn 4
及びこれに連通する吸引経路4bとにより構成されている。 And it is constituted by a suction path 4b communicating thereto.

【0013】また、前記超音波発振回路Eは、図2に示すように構成されている。 Further, the ultrasonic oscillator E is configured as shown in FIG. 図中、aは電源回路であり、 In the figure, a is the power supply circuit,
この電源回路において、21は所定の商用電源20から供給された交流電圧を整流する整流回路、22はこの整流回路から出力された直流電圧に含まれる脈流を低減する平滑回路、23は前記平滑回路の出力を振幅レベル設定回路32の信号に応じて安定した電圧に変える安定化電源回路である。 In this power supply circuit, the rectifier circuit 21 for rectifying an AC voltage supplied from a predetermined commercial power source 20, a smoothing circuit for reducing the ripple contained in the DC voltage outputted from the rectifier circuit 22, 23 the smoothing a stabilized power supply circuit for changing to a stable voltage according to an output of the circuit to a signal amplitude level setting circuit 32.

【0014】また、24は後述のトランジスタドライブ回路29と共に増幅部bを構成する電力増幅回路、25 [0014] 24 power amplifier circuit constituting the amplifying section b with the transistor drive circuit 29 will be described later, 25
は前記整合部cとしての整合回路兼振幅調整回路である。 Is a matching circuit and amplitude adjusting circuit as the alignment portion c. この整合回路兼振幅調整回路25は、前述のハンドピース部Mにおける電歪型振動子3に対し低損失で高周波電力を投入し得ると共に、電歪型振動子3を安定動作させるために適正な駆動振幅を保つようになっており、 The matching circuit and the amplitude adjusting circuit 25 is adequate to together may high frequency power, allow stable operation of electrostrictive vibrator 3 with low loss with respect electrostrictive vibrator 3 in the handpiece portion M of the above It is adapted to maintain the drive amplitude,
メス部(ホーン4の先端部)4aにかかる負荷の増減に対しメス部4aの振動を一定に保つようになっている。 Female part so that the relative increase or decrease of load on the 4a (distal portion of the horn 4) maintain the vibration of the female portion 4a constant.

【0015】また、dは前記整合回路兼振幅調整回路からの出力を帰還信号として前記増幅部bへ正帰還させる帰還部である。 Further, d is a feedback section for positive feedback to the amplifier unit b outputs from the matching circuit and the amplitude adjusting circuit as a feedback signal. この帰還部dは、前記帰還信号に含まれる電歪型振動子3のスプリアス周波数成分を除去する帰還信号フィルター26と、帰還回路のQを調整する帰還信号Q回路27と、この帰還信号Q回路27から出力された帰還信号をトランジスタドライブ回路29及び制御部eへと出力する帰還信号検出回路28とよりなる。 The feedback section d has a feedback signal filter 26 to remove spurious frequency components of the electrostrictive vibrator 3 included in the feedback signal, the feedback signal Q circuit 27 to adjust the Q of the feedback circuit, the feedback signal Q circuit a feedback signal output from the 27 the more the feedback signal detecting circuit 28 for outputting to the transistor drive circuit 29 and the control unit e.

【0016】一方、制御部eは、前記帰還信号検出回路17から出力された帰還信号の周波数に基づき告知手段等の駆動を制御するものであり、帰還信号の周波数を検出する周波数検出回路30と、帰還信号の周波数が予め設定した周波数範囲内であるか否かを判別する判別回路31と、この判別回路31から出力される判別結果に応じて安定化電源回路23における出力の振幅レベルを設定する出力制御回路としての振幅レベル設定回路32 [0016] On the other hand, the control unit e is for controlling the drive, such as notification means based on the frequency of the output feedback signal from the feedback signal detecting circuit 17, the frequency detection circuit 30 for detecting the frequency of the feedback signal , a determination circuit 31 that the frequency of the feedback signal to determine whether it is within the frequency range set in advance, set the amplitude level of the output of the stabilized power supply circuit 23 according to the determination result output from the determination circuit 31 amplitude level setting circuit 32 as an output control circuit for
と、告知手段の駆動を制御する駆動制御回路33とからなる。 When, a driving control circuit 33 for controlling the driving of the notification means. また、前記制御部eによって制御される告知手段fは、所定の音声信号を出力する音声発生回路34とこの音声発生回路34からの出力に応じて音声を発するスピーカ35とからなる。 Furthermore, notification means f which is controlled by the control unit e is composed of a speaker 35 for emitting sound in response voice generating circuit 34 for outputting a predetermined sound signal to the output from the sound generation circuit 34.

【0017】以上のように、この実施例における超音波手術装置は、電源部a、増幅部b、整合部c、帰還部d、及び制御部e及び告知手段fなどからなる超音波発振回路Eを有しており、この回路Eでは、トランジスタドライブ回路29から供給された信号を、増幅部bにて増幅した後、その信号を整合部c及び帰還部dを介して増幅部dへと正帰還させることにより電気的超音波振動を発生させ、さらにその電気的超音波振動を整合部cを介してハンドピース部1の電歪型振動子3に投入することにより高周波電力を機械的振動エネルギーへと変換し、その機械振動エネルギーをホーン4へと伝達する。 [0017] As described above, the ultrasonic surgical apparatus in this embodiment, the power supply unit a, the amplification unit b, the matching section c, the feedback portion d, and the like controller e and notification means f ultrasonic oscillator E the has, in the circuit E, the signal supplied from the transistor drive circuit 29, after amplified by the amplifier portion b, or the signal to the amplifying unit d via the matching section c and the feedback unit d positive to generate electrical ultrasonic vibration by causing the feedback is mechanical vibration energy frequency power by further introducing the electrical ultrasonic vibration to the electrostrictive vibrator 3 handpiece unit 1 through the matching unit c converted to, it communicates the mechanical vibration energy into the horn 4.
これにより、ホーン4の先端部4aは、所定の振幅で超音波振動を行い、生体組織等の切断を行うメス部として作用する。 Thus, the distal end portion 4a of the horn 4 is subjected to ultrasonic vibration at a predetermined amplitude, it acts as a female part which performs cutting of the biological tissue and the like.

【0018】この際、電歪型振動子3とホーン4とからなる振動系には、振動変換動作に伴って発熱を生じるが、ハンドピース部Mに設けられた冷却機構が適正に作動している場合には、電歪型振動子3及びホーン4が高温化することはなく、手術者や患者に対して安全に使用することができる。 [0018] At this time, the vibration system consisting of the electrostrictive vibrator 3 and the horn 4 which, although generate heat in association with the vibration conversion operation, cooling mechanism provided in the handpiece portion M is operating properly If you are, rather than the electrostrictive vibrator 3 and the horn 4 is high temperature, it can be used safely for the operator and patient. 但し、冷却機構は生理食塩水の供給パイプ5や吸引経路3dが詰まるなどして動作不能状態に陥ることもあり、このよう場合に、従来の装置では電歪型振動子3及びホーン4の温度が異常に高まり極めて危険な状態となるが、この実施例においては冷却機構の動作不良が発生した場合にも、電歪型振動子3及びホーン4が異常に加熱されるのを抑えることができる。 However, the cooling mechanism is also falling into inoperative state by such feed pipe 5 and the suction passage 3d saline is clogged, in this case, the temperature of the electrostrictive vibrator 3 and the horn 4 is a conventional apparatus Although an extremely dangerous condition increases abnormally, even if the malfunction of the cooling mechanism occurs in this embodiment, it is possible to suppress the electrostrictive vibrator 3 and the horn 4 is abnormally heated .

【0019】すなわち、冷却機構の機能が停止し、電歪型振動子3及びホーン4の温度が適正温度から上昇し始めると、その上昇に従って、ホーン4と電歪型振動子3 [0019] That is, the function of the cooling mechanism is stopped, the temperature of the electrostrictive vibrator 3 and the horn 4 starts to rise from the appropriate temperature, in accordance with the increase, the horn 4 and the electrostrictive vibrator 3
とからなる振動系の固有振動数も低下し始める。 The natural frequency of the vibration system consisting of a also starts to decrease. この固有振動数は、制御部eにおける周波数検出回路30によって検出されており、その検出周波数が予め設定した周波数範囲を越えた場合には、判別回路31から異常を表す判別信号が出力され、これが振幅レベル設定回路32 The natural frequency is detected by the frequency detection circuit 30 in the control unit e, when exceeding the frequency range the detected frequency is set in advance, the determination signal indicating an abnormality from the discriminating circuit 31 is outputted, which is the amplitude level setting circuit 32
及び駆動制御回路33に入力される。 And is input to the drive control circuit 33.

【0020】これにより、振幅レベル設定回路32は、 [0020] Thus, the amplitude level setting circuit 32,
前記判別信号出力前に設定されていた振幅レベルより低い振幅レベルに安定化電源回路23の出力を設定する。 To set the output of the stabilized power supply circuit 23 in the discrimination signal output lower amplitude level than the amplitude level that has been set before.
その結果、増幅部b及び整合部cを介してハンドピース部Mの電歪型振動子3に投入される高周波電力は低下するため、電歪型振動子3及びホーン4における超音波出力も低下し、それに伴って発熱も低減される。 Lowering a result, since the high-frequency power applied to the electrostrictive vibrator 3 of the handpiece portion M via the amplification section b and the matching unit c decreases, also the ultrasonic output at electrostrictive vibrator 3 and the horn 4 and, heat generation is reduced accordingly. 従って、 Therefore,
手術者や手術部位が高温化したハンドピース部Mによって火傷するといった危険性を完全に排除することができる共に、装置の構成部品の破損、または性能劣化等を防止することもできる。 Both the operator and the surgical site can be completely eliminate the risk such burn injury resulting handpiece unit M, which is high temperature, it is also possible to prevent breakage of the components of the device, or the performance deterioration.

【0021】また、この振幅レベル設定回路32のレベル変更動作に加え、この実施例においては、判別信号を受けた駆動制御回路33が音声発生回路34を駆動してスピーカ35から警告音を発生させるようになっている。 Further, in addition to the level change operation of the amplitude level setting circuit 32, in this embodiment, the drive control circuit 33 that has received the discrimination signal to generate a warning sound from the speaker 35 by driving the sound generating circuit 34 It has become way. このため手術者は、超音波手術装置の動作不良の発生を、警告音によって直ちに認識することができる。 Therefore operator has the operation occurrence of the failure of the ultrasonic surgical device can be recognized immediately by a warning sound.

【0022】なお、手術者や患者、及び構成部品等に対して安全に使用できる固有振動数の範囲F1は、適正状態における固有振動数をFとすると、例えば、(F− [0022] Incidentally, the operator and the patient, and the range F1 of the natural frequency can be safely used for components or the like, when the F natural frequencies in the proper state, for example, (F-
0.01F)<F1<(F+0.01F)となる。 0.01F) the <F1 <(F + 0.01F). 従って、上記判別回路31は上記範囲外の検出周波数が入力された場合に判別信号を出力するものとなっている。 Therefore, the discrimination circuit 31 is assumed to output a discriminating signal when the detection frequency outside the range is input. 但し、ここに示す範囲は一例であり、使用する振動系に応じて種々異なるものとなる。 However, the range shown here is an example, and different ones depending on the vibration system to be used.

【0023】また、電歪型振動子3やホーン4等の固有振動数の変動は、上記のような冷却機構の動作不良により異常加熱が発生した場合だけでなく、構成部品に亀裂が生じた場合、例えば、ホーン4に亀裂が生じた場合などにも発生する。 Further, variation in the natural frequency of such electrostrictive vibrator 3 and the horn 4, not only when the operation abnormality heated by failure of above-described cooling mechanism occurs, a crack occurs in the component If, for example, also occur in a case where a crack occurs in the horn 4. このため警告音の発生時において、冷却装置が適正に作動していれば、ハンドピース部4等に何等かの故障が発生しているとの判断を下すことができる。 In the event of this for a warning sound, if the cooling device if operating properly, failure of what like the handpiece portion 4 or the like can make a determination that has occurred. すなわち、この実施例における装置は故障検出機能をも有することとなる。 That is, apparatus in this embodiment will have also a failure detection function.

【0024】なお、上記実施例においては、周波数検出回路30を帰還信号検出回路28に接続して帰還信号周波数を検出するようにしたが、周波数検出回路30は、 [0024] In the above embodiment has been designed to detect the feedback signal frequency by connecting a frequency detection circuit 30 in the feedback signal detecting circuit 28, the frequency detection circuit 30,
整合回路兼振幅調整回路25、帰還フィルター26,帰還信号Q回路27,トランジスタドライブ回路29などの出力に接続しても、上記実施例と同様に周波数の検出を行うことができる。 The matching circuit and the amplitude adjusting circuit 25, a feedback filter 26, the feedback signal Q circuit 27, also connected to the output, such as a transistor drive circuit 29, similarly to the above embodiment can detect the frequency.

【0025】また、上記実施例では、判別回路31から出力された判別信号に応じて、振幅レベル設定回路32 [0025] In the above embodiment, according to the determination signal output from the determination circuit 31, an amplitude level setting circuit 32
が安定化電源回路23の振幅レベルを低減させるものとなっているが、安定化電源回路23の出力停止、または、その他の回路部分の遮断などを行うことにより、ハンドピース部Mに対して高周波電力の供給を完全に遮断しても良い。 Although becomes as reducing the amplitude level of the regulated power supply circuit 23, the output stop of the stabilized power supply circuit 23, or by performing such interruption of other circuit parts, a high frequency relative to the handpiece portion M it may be completely shut off the supply of power.

【0026】さらに、使用する告知手段fとしては、上記実施例のように音声を発生するものに限らず、表示器などを用い、これによって温度の異常な上昇などをはじめとする種々の故障の発生を警告表示するようにしても良い。 Furthermore, as the notifying means f used is not limited to generating a sound as in the above embodiment, using a display device, whereby a variety of faults, including such abnormal rise of temperature it may be warning the occurrence. また、超音波手術装置に対し、告知手段fと出力制御回路32のうち、いずれか一方のみを設けても良く、この場合にも安全性は従来の装置に比べて大幅に向上する。 Further, with respect to ultrasonic surgical devices, among notification means f an output control circuit 32 may be provided only one safety even in this case significantly improved as compared with the conventional device.

【0027】 [0027]

【発明の効果】以上説明したとおり、この発明に係る超音波手術装置は、ハンドピース部において冷却機構やその他の構成部品に故障が発生した場合には、これを検出して超音波発振回路の出力を低下または停止させるようになっているため、ハンドピース部が異常加熱される危険性もなくなり、手術者及び患者に対する安全性を十分に確保することができる。 As described above, according to the present invention, the ultrasonic surgical apparatus according to the present invention, when a failure in the cooling mechanism and other components in the handpiece portion is generated, detects this ultrasonic oscillator since adapted to reduce or stop the output, eliminates the risk of the handpiece portion is abnormally heated, it is possible to sufficiently ensure the safety for the operator and patient. また、ハンドピース部の高温化を防止し得るようにしたため、振動系等の構成部品が熱により破損するのを防止することができ、装置の耐久性は大幅に向上する。 Also, because you adapted to prevent high temperature of the handpiece unit, the components of the vibration system and the like can be prevented from being damaged by heat, the durability of the device is greatly improved.

【0028】さらに、ハンドピース部の故障検出時に告知手段を作動させるようにすれば、故障の発生を手術者などに直ちに認識させることができ、事故の発生を未然に防止することができる。 Furthermore, if to activate the notification means when the failure detection of the handpiece unit, it is possible to immediately recognize the occurrence of a failure such as the operator, it is possible to prevent the occurrence of accidents.

【図面の簡単な説明】 BRIEF DESCRIPTION OF THE DRAWINGS

【図1】この発明の一実施例を示す説明図であり、主としてハンドピース部の構成を示す。 Figure 1 is an explanatory diagram showing an embodiment of the present invention, mainly showing the configuration of the handpiece unit.

【図2】同上実施例における超音波発振回路の構成を示すブロック図である。 2 is a block diagram showing a configuration of an ultrasonic oscillator in the high frequency embodiments.

【図3】従来の超音波手術装置におけるハンドピース部を示す側面図である。 3 is a side view showing the handpiece portion of the conventional ultrasonic surgical device.

【図4】図3に示したハンドピース部に内蔵される電歪型振動子を示す側面図である。 4 is a side view showing an electrostriction type transducer incorporated in the handpiece part of FIG. 3.

【図5】従来の他の電歪型振動子を示す側面図である。 5 is a side view showing another conventional electrostrictive vibrator.

【符号の説明】 DESCRIPTION OF SYMBOLS

E 超音波発振回路 M ハンドピース部 f 告知手段 3 電歪型振動子 3d 吸引経路 4 ホーン 4a メス部 4b 吸引孔 5 イリゲーションパイプ 30 周波数検出回路 31 判別回路 32 振幅レベル設定回路(出力制御回路) 33 駆動制御回路 34 音声発生装置 35 スピーカ E ultrasonic oscillator M handpiece portion f notification means 3 electrostrictive vibrator 3d suction passage 4 horn 4a female portion 4b suction holes 5 irrigation pipe 30 frequency detecting circuit 31 determines the circuit 32 the amplitude level setting circuit (output control circuit) 33 drive control circuit 34 sound generation device 35 speaker

Claims (4)

    【特許請求の範囲】 [The claims]
  1. 【請求項1】 超音波発振回路からの高周波電力に応じてメス部に超音波振動を発生させるハンドピース部を備え、前記メス部の超音波振動によって生体組織などの破砕・切断を行うようにした超音波手術装置であって、 前記ハンドピース部は、 先端部をメス部とするホーンと、 前記ホーンに接続され、超音波発振回路から出力される高周波電力を機械的超音波振動に変換し、その機械的振動をホーンの先端部に伝達する電歪型振動子と、 この電歪型振動子とホーンとからなる振動系を冷却する冷却機構と、を備えると共に、 前記超音波発振回路には、 前記振動系の振動周波数を検出する周波数検出回路と、 前記周波数検出回路によって検出された周波数が所定の周波数範囲外であるとき所定の判別信号を出力する判別回路と、 前記判別 [Claim 1 further comprising a handpiece portion which generates ultrasonic vibrations to the female part in accordance with the high frequency power from the ultrasonic oscillation circuit, so as to perform crushing and cutting, such as biological tissue by the ultrasonic vibration of the female portion an ultrasonic surgical apparatus, the handpiece unit, and the horn to the female portion the tip portion is connected to said horn to convert the high-frequency power output from the ultrasonic oscillator into mechanical ultrasonic vibrations the electrostrictive vibrator for transmitting the mechanical vibration to the tip portion of the horn, and a cooling mechanism for cooling the vibration system consisting of the electrostrictive vibrator and the horn provided with a, to the ultrasonic oscillator includes a frequency detecting circuit for detecting the vibration frequency of the vibration system, a determination circuit for outputting a predetermined determination signal when said detected by the frequency detection circuit frequency is outside a predetermined frequency range, the determination 路に接続され、判別信号の受信時に超音波発振回路の出力を低減または遮断する出力制御回路とを設けることを特徴とする超音波手術装置。 Is connected to the road, the determination signal ultrasonic surgical apparatus characterized by providing an output control circuit that reduces or blocks the output of the ultrasonic oscillation circuit upon receipt of.
  2. 【請求項2】 超音波発振回路からの高周波電力に応じてメス部に超音波振動を発生させるハンドピース部を備え、前記メス部の超音波振動によって生体組織などの破砕・切断を行うようにした超音波手術装置であって、 前記ハンドピース部は、 先端部をメス部とするホーンと、 前記ホーンに接続され、超音波発振回路から出力される高周波電力を機械的超音波振動に変換し、その機械的振動をホーンの先端部に伝達する電歪型振動子と、 この電歪型振動子とホーンとからなる振動系を冷却する冷却機構と、を備えると共に、 前記超音波発振回路には、 前記振動系の振動周波数を検出する周波数検出回路と、 前記周波数検出回路によって検出された周波数が所定の周波数範囲外であるとき所定の判別信号を出力する判別回路と、 駆動状態 2. A includes a handpiece unit for generating ultrasonic vibration to the female part in accordance with the high frequency power from the ultrasonic oscillation circuit, so as to perform crushing and cutting, such as biological tissue by the ultrasonic vibration of the female portion an ultrasonic surgical apparatus, the handpiece unit, and the horn to the female portion the tip portion is connected to said horn to convert the high-frequency power output from the ultrasonic oscillator into mechanical ultrasonic vibrations the electrostrictive vibrator for transmitting the mechanical vibration to the tip portion of the horn, and a cooling mechanism for cooling the vibration system consisting of the electrostrictive vibrator and the horn provided with a, to the ultrasonic oscillator includes a frequency detecting circuit for detecting the vibration frequency of the vibration system, a determination circuit for outputting a predetermined determination signal when said detected by the frequency detection circuit frequency is outside a predetermined frequency range, the driving state おいて前記ハンドピース部の異常を告知する告知手段と、 前記判別回路に接続され、判別信号の受信時に前記告知手段を駆動する駆動制御回路とを設けることを特徴とする超音波手術装置。 And notification means for notifying the abnormality of Oite the handpiece unit, the determination is circuitry connected ultrasonic surgical apparatus characterized by providing a drive control circuit for driving the notification means when the reception of the discrimination signal.
  3. 【請求項3】 告知手段は、所定の警告音を発生させる音声発生装置により構成されることを特徴とする請求項2記載の超音波手術装置。 Wherein notification means is ultrasonic surgical apparatus according to claim 2, characterized in that it is constituted by a sound generation device for generating a predetermined alarm sound.
  4. 【請求項4】 告知手段は、所定の警告表示を行う表示器により構成されることを特徴とする請求項2記載の超音波手術装置。 Wherein notification means is ultrasonic surgical apparatus according to claim 2, characterized in that it is composed of the display unit for performing a predetermined warning display.
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