JP2001170066A - Ultrasonic treatment tool - Google Patents
Ultrasonic treatment toolInfo
- Publication number
- JP2001170066A JP2001170066A JP36294299A JP36294299A JP2001170066A JP 2001170066 A JP2001170066 A JP 2001170066A JP 36294299 A JP36294299 A JP 36294299A JP 36294299 A JP36294299 A JP 36294299A JP 2001170066 A JP2001170066 A JP 2001170066A
- Authority
- JP
- Japan
- Prior art keywords
- vibration
- ultrasonic
- frequency
- frequencies
- horn
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000009210 therapy by ultrasound Methods 0.000 title claims abstract description 26
- 230000005540 biological transmission Effects 0.000 claims abstract description 13
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 210000001519 tissue Anatomy 0.000 description 14
- 230000009466 transformation Effects 0.000 description 11
- 208000032843 Hemorrhage Diseases 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 230000000740 bleeding effect Effects 0.000 description 4
- 230000015271 coagulation Effects 0.000 description 3
- 238000005345 coagulation Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000003321 amplification Effects 0.000 description 2
- 238000004945 emulsification Methods 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910002113 barium titanate Inorganic materials 0.000 description 1
- JRPBQTZRNDNNOP-UHFFFAOYSA-N barium titanate Chemical compound [Ba+2].[Ba+2].[O-][Ti]([O-])([O-])[O-] JRPBQTZRNDNNOP-UHFFFAOYSA-N 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 230000023597 hemostasis Effects 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 229910052451 lead zirconate titanate Inorganic materials 0.000 description 1
- HFGPZNIAWCZYJU-UHFFFAOYSA-N lead zirconate titanate Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Ti+4].[Zr+4].[Pb+2] HFGPZNIAWCZYJU-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000029052 metamorphosis Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 210000004872 soft tissue Anatomy 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000010356 wave oscillation Effects 0.000 description 1
Landscapes
- Surgical Instruments (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は超音波振動を利用し
て治療を行なう超音波処置具に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ultrasonic treatment device for performing treatment using ultrasonic vibration.
【０００２】[0002]
【従来の技術】超音波処置具は、外科手術において生体
組織を出血することなく乳化、破砕、凝固、切開等する
ために用いられ、一般的には２０〜６０ｋＨｚの範囲に
おける１種類の固定周波数による手術システムが普及し
ている。2. Description of the Related Art An ultrasonic treatment instrument is used for emulsification, crushing, coagulation, incision and the like without bleeding a living tissue in a surgical operation, and is generally one kind of fixed frequency in a range of 20 to 60 kHz. Surgical systems are widely used.
【０００３】生体組織の弾性や脆性など物理的特性の差
異のため、超音波振動の周波数によって処置性能が異な
ることは当業者に良く知られているところである。例え
ば、硬い組織には２０ｋＨｚ程度の低い周波数が効果的
であり、柔らかい組織には４０〜６０ｋＨｚの高い周波
数がより有効である。また、低い周波数では組織の乳
化、破砕が良好に行なえ、高い周波数ではより凝固性が
増すことも知られている。It is well known to those skilled in the art that the treatment performance varies depending on the frequency of ultrasonic vibration due to the difference in physical properties such as elasticity and brittleness of living tissue. For example, a low frequency of about 20 kHz is effective for hard tissue, and a high frequency of 40 to 60 kHz is more effective for soft tissue. It is also known that at low frequencies, tissue emulsification and crushing can be favorably performed, and at high frequencies, coagulability increases.
【０００４】ここで、超音波振動が生体に与える総合的
な効果量（破砕量、凝固範囲、出血の有無）としては、
振動振幅ではなく振動速度（＝２π《振幅》×《周波
数》）が大きく影響し、２０〜１００ｋＨｚの範囲にお
いて５〜１５ｍ／ｓ2程度で出血することなく且つ有効
な効果を得ることが可能である。なお、特開平９−１３
５８４２号公報や特開平１１−１１３９２０号公報に
は、複数の周波数を選択的に或いは多周波調和振動とし
て出力可能な超音波処置具が開示されている。[0004] Here, the total effect amount (crushing amount, coagulation range, presence or absence of hemorrhage) given to the living body by the ultrasonic vibration is as follows.
The vibration velocity (= 2π << amplitude >> × <frequency >>) has a large effect, not the vibration amplitude, and an effective effect can be obtained without bleeding at about 5 to 15 m / s 2 in the range of 20 to 100 kHz. is there. Incidentally, Japanese Patent Application Laid-Open No. 9-13 / 1997
Japanese Patent Application Laid-Open No. 5842 and Japanese Patent Application Laid-Open No. H11-113920 disclose an ultrasonic treatment instrument capable of selectively outputting a plurality of frequencies or as multifrequency harmonic vibration.
【０００５】[0005]
【発明が解決しようとする課題】一般に、超音波処置具
は、所定の駆動周波数で振動する超音波振動子と、超音
波振動子で発生する振動を伝達するための振動伝達部材
とを備えており、前記振動伝達部材の先端の処置部で生
体組織に処置を施す。また、前記振動子で発生する超音
波出力は、生体組織の処置を行なうためには振動エネル
ギが小さいため、通常は、振動伝達部材にホーンと呼ば
れる断面積縮小部を構成することにより、所望の振動エ
ネルギに増幅している。ところが、駆動周波数を切換え
た際に、振動伝達部材の振動分布が変化することによ
り、振動伝達部材のホーンによる振幅増加率あるいは振
動速度増幅率（以下、変成比という。）が大きく変わ
り、処置効果の低下や意図せぬ出血、さらに、応力集中
による振動伝達部材の破損を引き起こす可能性がある。Generally, an ultrasonic treatment instrument includes an ultrasonic vibrator vibrating at a predetermined driving frequency, and a vibration transmitting member for transmitting vibration generated by the ultrasonic vibrator. Then, a treatment section on the distal end of the vibration transmission member performs treatment on the living tissue. In addition, the ultrasonic output generated by the vibrator has a small vibration energy in order to perform treatment of a living tissue. Therefore, usually, by forming a cross-sectional area reducing portion called a horn in a vibration transmitting member, a desired ultrasonic output is obtained. It is amplified to vibration energy. However, when the drive frequency is switched, the vibration distribution of the vibration transmitting member changes, so that the amplitude increase rate of the vibration transmitting member due to the horn or the vibration speed amplification rate (hereinafter, referred to as the transformation ratio) greatly changes, and the treatment effect is obtained. Of the vibration transmitting member due to reduced stress, unintentional bleeding, and stress concentration.
【０００６】駆動電源装置から振動子に供給する電力を
周波数に応じて変化させて周波数間の振動エネルギの補
正を行なう従来の方法は、振動子の強度や発熱による特
性劣化が発生しない狭い範囲でのみしか実現できず、振
動伝達部材の変成比の補正を行なうことは事実上困難で
ある。また、複数の振動伝達部材から構成される超音波
処置システムを構築するためには、全ての振動伝達部材
の変成比を周波数間で同等にするか、あるいは、全ての
振動伝達部材において駆動周波数間での変成比の変化を
一定比率に揃える必要がある。The conventional method of correcting the vibration energy between the frequencies by changing the power supplied from the drive power supply to the vibrator in accordance with the frequency is limited to a narrow range in which the characteristics of the vibrator do not deteriorate due to the strength or heat generation. Only this can be realized, and it is practically difficult to correct the transformation ratio of the vibration transmitting member. Further, in order to construct an ultrasonic treatment system composed of a plurality of vibration transmitting members, it is necessary to make the transformation ratio of all vibration transmitting members equal between frequencies, or to set the It is necessary to make the change of the metamorphic ratio at a constant ratio.
【０００７】このように、従来の多周波数の超音波処置
具では、選択された駆動周波数ごとに処置部の振動速度
が異なり、十分な処置効果を確保できないという問題が
あった。As described above, in the conventional multi-frequency ultrasonic treatment instrument, there is a problem that the vibration speed of the treatment section differs for each selected driving frequency, and a sufficient treatment effect cannot be secured.
【０００８】本発明は前記事情に着目してなされたもの
であり、その目的とするところは、複数の周波数により
駆動可能で、選択された駆動周波数によらず処置部の振
動速度が一定な超音波処置具を提供することにある。The present invention has been made in view of the above circumstances, and it is an object of the present invention to be able to drive with a plurality of frequencies, and to provide a vibration speed of a treatment section which is constant regardless of the selected driving frequency. It is to provide a sonic treatment device.
【０００９】[0009]
【課題を解決するための手段】前記課題を解決するため
に、請求項１に記載された発明は、複数の周波数で駆動
可能な超音波振動子と、超音波振動子に着脱自在に取り
付けられ且つ超音波振動を先端の処置部に伝達する振動
伝達部材とから構成される超音波処置具において、駆動
周波数によらず、振動伝達部材の先端処置部における振
動速度がほぼ等しいことを特徴とする。In order to solve the above-mentioned problems, the invention described in claim 1 is directed to an ultrasonic vibrator which can be driven at a plurality of frequencies, and is detachably attached to the ultrasonic vibrator. In addition, in the ultrasonic treatment tool including the vibration transmitting member that transmits the ultrasonic vibration to the treatment section at the distal end, the vibration speed at the distal treatment section of the vibration transmission member is substantially equal regardless of the drive frequency. .
【００１０】また、請求項２に記載された発明は、複数
の周波数で駆動可能な超音波振動子と、超音波振動子に
着脱自在に取り付けられ且つ超音波振動を先端の処置部
に伝達する振動伝達部材とから構成される超音波処置具
において、駆動周波数によらず、振動速度変換率がほぼ
等しくなるホーンを振動伝達部材に具備したことを特徴
とする。According to a second aspect of the present invention, there is provided an ultrasonic vibrator which can be driven at a plurality of frequencies, and is detachably attached to the ultrasonic vibrator and transmits the ultrasonic vibration to a treatment section at the distal end. An ultrasonic treatment device including a vibration transmitting member is characterized in that a horn whose vibration speed conversion rate is substantially equal is provided in the vibration transmitting member regardless of the drive frequency.
【００１１】[0011]
【発明の実施の形態】以下、図面を参照しながら本発明
の実施形態について説明する。Embodiments of the present invention will be described below with reference to the drawings.
【００１２】図１〜図４は本発明の第１の実施形態を示
している。図１に示されるように、本実施形態の超音波
処置具は、トランスデューサーユニット１と、振動伝達
部材２と、シースユニット３とから構成されている。振
動伝達部材２の先端は、超音波振動エネルギによって生
体組織を処置する処置部１５として形成されている。ト
ランスデューサーユニット１は、ボルト締めランジュバ
ン型振動子４（以下、ＢＬＴという。）がケーシング９
に内蔵されて成る。ＢＬＴ４は、チタン酸バリウムまた
はジルコン酸チタン酸鉛などの圧電素子６と電極板７と
を複数枚ずつ交互に積層することによって構成されてお
り、ボルト部５ｄを有するフロントマス５とナット部８
ｄを有するバックマス８とが締め付けられることにより
組み立てられる。フロントマス５の先端５ａには、振動
伝達部材２が着脱自在に取り付ける雌ねじが切られてい
る。また、フロントマス５にはその全長にわたって貫通
孔５ｂが形成されている。FIGS. 1 to 4 show a first embodiment of the present invention. As shown in FIG. 1, the ultrasonic treatment device according to the present embodiment includes a transducer unit 1, a vibration transmitting member 2, and a sheath unit 3. The distal end of the vibration transmitting member 2 is formed as a treatment section 15 for treating a living tissue with ultrasonic vibration energy. The transducer unit 1 includes a bolt-fastened Langevin type vibrator 4 (hereinafter, referred to as BLT) having a casing 9.
It is built in. The BLT 4 is configured by alternately laminating a plurality of piezoelectric elements 6 such as barium titanate or lead zirconate titanate and electrode plates 7, and a front mass 5 having a bolt portion 5 d and a nut portion 8.
It is assembled by fastening the back mass 8 having d. The front end 5a of the front mass 5 is provided with a female screw to which the vibration transmitting member 2 is detachably attached. Further, a through hole 5b is formed in the front mass 5 over its entire length.
【００１３】ＢＬＴ４は、その全長を半波長とする周波
数ｆ１の基本振動モードと、基本振動ｆ１の３倍の周波
数ｆ２（＝３×ｆ１）における２つの振動モードで、共
に効率よく駆動できるように設計されている。 ここ
で、それぞれの周波数の波長をλ１、λ２とする。な
お、波長は素材の音速Ｃと周波数ｆとから決定され、λ
＝ｃ／ｆである。The BLT 4 has a fundamental vibration mode at a frequency f1 whose entire length is a half wavelength, and two vibration modes at a frequency f2 (= 3 × f1) three times the fundamental vibration f1 so that both can be efficiently driven. Designed. Here, the wavelengths of the respective frequencies are λ 1 and λ 2 . Note that the wavelength is determined from the sound speed C of the material and the frequency f, and λ
= C / f.
【００１４】図２の（ａ）中には、基本振動の振動分布
が実線で、また、３倍の周波数ｆ２の振動分布が破線で
示されている。In FIG. 2A, the vibration distribution of the fundamental vibration is indicated by a solid line, and the vibration distribution of the triple frequency f2 is indicated by a broken line.
【００１５】一般に、複数の周波数で駆動可能なＢＬＴ
４において、基本振動の整数倍の高次周波数振動におけ
る振動速度は、基本振動の振動速度より減少する傾向に
ある。本実施形態では、フロントマス５に断面積縮小部
を設け、主にｆ２の振動を増幅することにより、ｆ１と
ｆ２の周波数によらずフロントマス５の先端部での振動
速度をほぼ同等としている。また、ＢＬＴ４にあって
は、図２の（ｂ）に示すように、それぞれの振動モード
の節点付近に圧電素子６と電極板７とが配置されること
により、ｆ１とｆ２の振動速度の差異を極力小さくする
ことが可能である。あるいは、駆動電源装置（図示しな
い）からＢＬＴ４に供給される電力の制御を行なうこと
により、ＢＬＴ４の振動モード間で発生する振動速度の
差異を補正することも可能である。Generally, a BLT that can be driven at a plurality of frequencies
In 4, the vibration speed of the higher-frequency vibration that is an integral multiple of the fundamental vibration tends to be lower than the vibration speed of the fundamental vibration. In the present embodiment, the cross-sectional area reduction portion is provided in the front mass 5 to amplify mainly the vibration of f2, so that the vibration speed at the front end of the front mass 5 is substantially equal regardless of the frequencies of f1 and f2. . In addition, in the BLT 4, as shown in FIG. 2B, the piezoelectric elements 6 and the electrode plates 7 are arranged near the nodes of the respective vibration modes, so that the difference in vibration speed between f1 and f2 is obtained. Can be reduced as much as possible. Alternatively, by controlling the power supplied to the BLT 4 from a driving power supply device (not shown), it is possible to correct a difference in vibration speed between the vibration modes of the BLT 4.
【００１６】周波数ｆ１，ｆ２両方の振動モードにて振
動の節となる位置にはフランジ部５ｃが形成されてい
る。フランジ部５ｃの前後をゴム部材１０で挟み込み、
ケーシング９と締め付けリング１１とをネジ止めするこ
とにより、ＢＬＴ４がケーシング９に保持されている。A flange portion 5c is formed at a position serving as a node of vibration in both vibration modes of frequencies f1 and f2. Sandwiching the front and rear of the flange portion 5c with the rubber member 10,
The BLT 4 is held by the casing 9 by screwing the casing 9 and the fastening ring 11 together.
【００１７】ＢＬＴ４の基端側ではボトル部５ｄがバッ
クマス８から後方に突出しており、このボルト部５ｄに
は、シール部材１２を挟んでケーシング９に取り付けら
れた口金１３が水密状態で接続されている。なお、口金
１３には吸引ポンプ（図示しない）から延びる吸引チュ
ーブが接続される。At the base end of the BLT 4, a bottle portion 5d projects rearward from the back mass 8, and a cap 13 attached to the casing 9 with a sealing member 12 interposed therebetween is connected to the bolt portion 5d in a watertight state. ing. The base 13 is connected to a suction tube extending from a suction pump (not shown).
【００１８】電極板７にはリード線１４ａ，１４ｂが半
田付けされている。これらのリード線１４ａ，１４ｂ
は、ケーシング９の後端に取付けられたコード１４ｃに
接続されている。なお、コード１４ｃは電源装置（図示
しない）に接続される。The lead wires 14a and 14b are soldered to the electrode plate 7. These lead wires 14a, 14b
Is connected to a cord 14c attached to the rear end of the casing 9. The cord 14c is connected to a power supply (not shown).
【００１９】図１に示されるように、シースユニット３
は、樹脂性のシース１９と、シース取り付け部材２０
と、シース取り付け部材２０に取り付けられた送水用口
金２１とから構成されている。シース取り付け部材２０
の基端部２０ａには、トランスデューサーユニット１の
ケーシング９がクリック状に着脱自在に嵌合されてい
る。As shown in FIG. 1, the sheath unit 3
Is a resin sheath 19 and a sheath mounting member 20
And a water supply mouthpiece 21 attached to the sheath attachment member 20. Sheath mounting member 20
The casing 9 of the transducer unit 1 is clickably and detachably fitted to the base end portion 20a.
【００２０】振動伝達部材２の振動分布が図２の（ａ）
に示されている。本実施形態では、振動伝達部材２は、
周波数ｆ１で半波長×２、ｆ２で半波長×６の定在波振
動となる。振動伝達部材２の基端部にはＢＬＴ４の先端
ネジ部５ａに対応したネジ部２ａが形成されており、し
たがって、振動伝達部材２はＢＬＴ４に着脱可能に接続
される。また、振動伝達部材２にはその全長にわたって
貫通穴２ｂが形成されている。The vibration distribution of the vibration transmitting member 2 is shown in FIG.
Is shown in In the present embodiment, the vibration transmitting member 2
At the frequency f1, a standing wave oscillation of half wavelength × 2 and at f2 a half wavelength × 6 is generated. At the base end of the vibration transmitting member 2, a screw portion 2a corresponding to the distal screw portion 5a of the BLT 4 is formed. Therefore, the vibration transmitting member 2 is detachably connected to the BLT 4. The vibration transmitting member 2 has a through hole 2b formed over its entire length.
【００２１】振動伝達部材２は、図２の（ａ）中のＡ，
Ｂで示す位置にステップホーンを備えおり、これらのス
テップホーンで振動速度を増幅している。この振動速度
の増幅率（以下、変成比という。）は、後述するよう
に、ｆ１，ｆ２の両方の周波数で同程度となる。なお、
物理的に振幅の増加率と振動速度の増加率は等しくな
る。The vibration transmitting member 2 is formed by A, A in FIG.
Step horns are provided at positions indicated by B, and the vibration speed is amplified by these step horns. As will be described later, the amplification rate of the vibration speed (hereinafter referred to as the transformation ratio) is substantially the same at both frequencies f1 and f2. In addition,
Physically, the rate of increase in amplitude is equal to the rate of increase in vibration velocity.
【００２２】図２の（ａ）中の＊で示された部分に関
し、断面積をＳ１からＳ２に縮小させたステップホーン
の面積縮小位置（図中、Ｌで示されている）と変成比と
の関係が図３に示されている。周波数ｆ１での変成比が
実線で、また、ｆ２の周波数の変成比が破線で示されて
いる。図３において、変成比は周波数によらず振動の節
位置において極大値Ｓ１／Ｓ２をとる。ここで、実線と
破線の交点位置（Ａ，Ａ’，Ａ”）にてステップホーン
を構成すると、ｆ１とｆ２の両方の周波数にて変成比を
ほぼ同等とすることができる。このような点は、周波数
ｆ１の半波長の範囲において３箇所存在するが、本実施
形態では、変成比が最大となるＡの位置にてホーンを構
成している。これと同様に、先端側のλ1／２の振動系
においても、Ｂにてステップホーンを構成している。With respect to the portion indicated by * in FIG. 2A, the area reduction position (indicated by L in the figure) of the step horn whose cross-sectional area is reduced from S1 to S2, and the transformation ratio Is shown in FIG. The transformation ratio at the frequency f1 is indicated by a solid line, and the transformation ratio at the frequency f2 is indicated by a broken line. In FIG. 3, the metamorphic ratio takes the maximum value S1 / S2 at the node position of the vibration regardless of the frequency. Here, when the step horn is formed at the intersection (A, A ', A ") of the solid line and the broken line, the transformation ratio can be made substantially equal at both frequencies f1 and f2. is present three in the range of the half wavelength of the frequency f1, in the present embodiment, transformation ratio constitutes the horn at a position a of maximum. Similarly, the distal lambda 1 / In the vibration system 2 also, B constitutes a step horn.
【００２３】最大変成比（Ｓ１／Ｓ２）を変化させた時
のｆ１，ｆ２の振動拡大率が図４に示されている。基本
周波数ｆ１の節位置以外の破線と実線との交点は僅かに
その位置を変えるため、基本周波数ｆ１の節位置にてホ
ーンを構成することが設計を行なう上で容易である。FIG. 4 shows the vibration expansion rates of f1 and f2 when the maximum transformation ratio (S1 / S2) is changed. Since the intersection between the broken line and the solid line other than the nodal position of the fundamental frequency f1 is slightly changed, it is easy to design the horn at the nodal position of the fundamental frequency f1 in designing.
【００２４】次に、上記構成の超音波処置具の作用につ
いて説明する。Next, the operation of the ultrasonic treatment device having the above configuration will be described.
【００２５】まず、処置を行なうべき生体組織を最も効
果的に処置が可能な周波数を電源装置の周波数切換えス
イッチ（図示せず）にて選択する。また、電源装置の出
力設定レベルを選択する。First, a frequency at which a living tissue to be treated can be most effectively treated is selected by a frequency switch (not shown) of the power supply device. Further, the output setting level of the power supply device is selected.
【００２６】以上の設定が完了したら、先端処置部１５
を組織に接触させてフットスイッチ（図示せず）を踏
む。これにより、選択された周波数および出力レベルに
て超音波振動が制御される。同時に、送水用口金２１か
ら冷却水が振動伝達部材２とシースユニット３との間か
ら先端側に流れる。また、吸引用口金１３には吸引ポン
プが接続され、先端処置部１５にて破砕された組織を吸
引することができる。When the above settings are completed, the distal treatment section 15
Is brought into contact with the tissue and a foot switch (not shown) is depressed. Thereby, the ultrasonic vibration is controlled at the selected frequency and output level. At the same time, the cooling water flows from the water transmission base 21 to the distal end side from between the vibration transmitting member 2 and the sheath unit 3. Further, a suction pump is connected to the suction base 13 so that the tissue crushed by the distal treatment section 15 can be sucked.
【００２７】ｆ１，ｆ２で駆動される超音波振動の先端
処置部１５での振動速度は、電源装置の出力設定レベル
が同じであれば略同等となり、破砕量自体は略等しくな
る。特に、出血しやすい組織を処置する場合には、一般
に、出力設定を下げて用いられるが、選択する周波数間
での振動速度の差がないため、違和感なく出力設定を行
なうことが可能である。さらに、振動速度拡大によるホ
ーン部での応力の著しい増加を回避することができる。The vibration speeds of the ultrasonic vibrations driven by f1 and f2 in the distal end treatment section 15 are substantially equal if the output setting level of the power supply device is the same, and the crushing amount itself is substantially equal. In particular, when treating a tissue that is likely to bleed, the output setting is generally lowered, but since there is no difference in the vibration speed between the selected frequencies, the output setting can be performed without discomfort. Further, it is possible to avoid a remarkable increase in stress at the horn portion due to the expansion of the vibration speed.
【００２８】図５〜図７は本発明の第２の実施形態を示
している。FIGS. 5 to 7 show a second embodiment of the present invention.
【００２９】図５に示されるように、本実施形態では、
ホーンの形状のみが第１の実施形態と異なる。すなわ
ち、本実施形態では、長さＬｈのエクスポーネンシャル
ホーン２２が振動伝達部材２に設けられている。一般的
に、エクスポーネンシャルホーン２２はステップホーン
と比較して応力を低減することができる。As shown in FIG. 5, in this embodiment,
Only the shape of the horn differs from the first embodiment. That is, in the present embodiment, the exponential horn 22 having the length Lh is provided on the vibration transmission member 2. Generally, the exponential horn 22 can reduce the stress as compared with the step horn.
【００３０】図６には、Ｌｈが比較的短い（Ｌｈ《λ2
／４）場合における周波数ｆ１，ｆ２の各振動モードの
振動拡大率がそれぞれ実線および破線で示されている。
この場合は、ステップホーンと同様に、ｆ１での節位置
にてｆ１，ｆ２の振動拡大率を同等にすることができ
る。FIG. 6 shows that Lh is relatively short (Lh << λ 2
In the case of / 4), the vibration magnification of each of the vibration modes of the frequencies f1 and f2 is shown by a solid line and a broken line, respectively.
In this case, similarly to the step horn, the vibration expansion rates of f1 and f2 can be made equal at the node position at f1.
【００３１】また、図７には、Ｌｈが比較的長い（Ｌh
≒λ2／４）場合におけるのｆ１，ｆ２の各振動モード
の振動拡大率がそれぞれ実線および破線で示されてい
る。図７から分かるように、ｆ１の節位置にてホーンを
構成すると、ｆ２の振動拡大率が小さくなる。このた
め、ホーン長が長い場合は、ｆ１の節とｆ２の節との間
で振動拡大率が同等なホーンを構成する。FIG. 7 shows that Lh is relatively long (Lh
≒ λ 2/4) Vibration magnification of each of the vibration modes of the f1, f2 of the case are respectively shown in solid and dashed lines. As can be seen from FIG. 7, when the horn is configured at the node position of f1, the vibration expansion rate of f2 decreases. For this reason, when the horn length is long, a horn having the same vibration expansion rate between the node f1 and the node f2 is formed.
【００３２】以上は、コニカルホーン（テーパーホー
ン）、カテノイダルホーンについても同様である。すな
わち、ホーン部が長い場合には、互いに隣り合うｆ１と
ｆ２の節位置の中間部にホーンを構成することにより、
変成比を同等にすることが可能である。The same applies to the conical horn (taper horn) and the catenoidal horn. That is, when the horn portion is long, the horn is formed at an intermediate portion between the node positions of f1 and f2 adjacent to each other,
It is possible to make the metamorphic ratio equal.
【００３３】図８は本発明の第３の実施形態を示してい
る。本実施形態では、振動伝達部材２の先端に鍵型部１
８が設けられている。なお、それ以外の構成は第１また
は第２の実施形態と同一である。FIG. 8 shows a third embodiment of the present invention. In the present embodiment, the key-shaped portion 1
8 are provided. The other configuration is the same as that of the first or second embodiment.
【００３４】このような構成によれば、鍵型部１８の内
側１８ａで生体組織を引掛け、低い周波数ｆ１にて振動
させることにより、出血することなく組織を切開するこ
とができる。また、鍵型部１８の先端１８ｂを組織に押
し当てて、高い周波数ｆ２にて振動させることにより止
血凝固することができる。According to such a configuration, the living tissue is hooked on the inside 18a of the key-shaped portion 18 and vibrated at a low frequency f1, so that the tissue can be incised without bleeding. Further, the distal end 18b of the key-shaped portion 18 is pressed against the tissue and vibrated at a high frequency f2 so that hemostasis and coagulation can be performed.
【００３５】なお、以上説明してきた技術内容によれ
ば、以下に示されるような各種の構成が得られる。According to the technical contents described above, various configurations as described below can be obtained.
【００３６】１．複数の周波数で駆動可能な超音波振動
子と、超音波振動子に着脱自在に取り付けられ且つ超音
波振動を先端の処置部に伝達する振動伝達部材とから構
成される超音波処置具において、駆動周波数によらず、
振動伝達部材の先端処置部における振動速度がほぼ等し
いことを特徴とする超音波処置具。1. An ultrasonic treatment device comprising: an ultrasonic vibrator that can be driven at a plurality of frequencies; and a vibration transmission member detachably attached to the ultrasonic vibrator and transmitting ultrasonic vibrations to a treatment section at a distal end. Regardless of frequency,
An ultrasonic treatment device, wherein the vibration speed in the distal treatment section of the vibration transmission member is substantially equal.
【００３７】２．複数の周波数で駆動可能な超音波振動
子と、超音波振動子に着脱自在に取り付けられ且つ超音
波振動を先端の処置部に伝達する振動伝達部材とから構
成される超音波処置具において、駆動周波数によらず、
振動速度変換率がほぼ等しくなるホーンを振動伝達部材
に具備したことを特徴とする超音波処置具。2. An ultrasonic treatment device comprising: an ultrasonic vibrator that can be driven at a plurality of frequencies; and a vibration transmission member detachably attached to the ultrasonic vibrator and transmitting ultrasonic vibrations to a treatment section at a distal end. Regardless of frequency,
An ultrasonic treatment instrument comprising a vibration transmitting member provided with a horn whose vibration velocity conversion rates are substantially equal.
【００３８】３．一方の周波数が他方の約３倍の周波数
であり、振動伝達部材の小さい周波数における振動の節
付近に少なくとも１つのホーンを構成することを特徴と
する第2項に記載の超音波処置具。 ４．一方の周波数が他方の約３倍の周波数であり、振動
伝達部材の小さい周波数における振動の節と前記節に最
も近い大きい周波数における振動の節との中間位置にホ
ーンを構成したことを特徴とする第２項に記載の超音波
処置具。3. 3. The ultrasonic treatment device according to claim 2, wherein one frequency is about three times as high as the other, and at least one horn is formed near a node of vibration at a small frequency of the vibration transmitting member. 4. One frequency is about three times the frequency of the other, and the horn is formed at an intermediate position between a vibration node at a small frequency of the vibration transmitting member and a vibration node at a large frequency closest to the node. Item 3. The ultrasonic treatment device according to Item 2.
【００３９】[0039]
【発明の効果】以上説明したように、本発明によれば、
複数の周波数により駆動可能で、選択された駆動周波数
によらず処置部の振動速度が一定な超音波処置具を提供
できる。As described above, according to the present invention,
It is possible to provide an ultrasonic treatment tool that can be driven at a plurality of frequencies and has a constant vibration speed of the treatment section regardless of the selected drive frequency.
【図１】本発明の第１の実施形態に係る超音波処置具の
側断面図である。FIG. 1 is a side sectional view of an ultrasonic treatment device according to a first embodiment of the present invention.
【図２】図１の超音波処置具の各振動モードでの振動分
布を示す図である。FIG. 2 is a diagram showing a vibration distribution in each vibration mode of the ultrasonic treatment device in FIG.
【図３】図２の（ａ）中の＊で示された部分に関し、断
面積をＳ１からＳ２に縮小させたステップホーンの面積
縮小位置と変成比との関係を示す図である。FIG. 3 is a diagram showing a relationship between an area reduction position of a step horn whose cross-sectional area is reduced from S1 to S2 and a metamorphosis ratio with respect to a portion indicated by * in FIG. 2A.
【図４】最大変成比（Ｓ１／Ｓ２）を変化させた時のｆ
１，ｆ２の振動拡大率を示す図である。FIG. 4 shows f when the maximum transformation ratio (S1 / S2) is changed
It is a figure which shows the vibration magnification rate of 1 and f2.
【図５】本発明の第２の実施形態に係る超音波処置具の
エクスポーネンシャルホーンを有する振動伝達部材の要
部側面図である。FIG. 5 is a side view of a main part of a vibration transmission member having an exponential horn of an ultrasonic treatment device according to a second embodiment of the present invention.
【図６】エクスポーネンシャルホーンの長さＬｈが比較
的短い（Ｌｈ《λ2／４）場合における周波数ｆ１，ｆ
２の各振動モードの振動拡大率を示す図である。[6] of the exponential horn is relatively short length Lh (Lh "λ 2/4 ) frequency f1 in the case, f
It is a figure which shows the vibration expansion rate of each vibration mode of 2.
【図７】Ｌｈが比較的長い（Ｌh≒λ2／４）場合におけ
るのｆ１，ｆ２の各振動モードの振動拡大率を示す図で
ある。7 is a diagram showing the vibration magnification of each of the vibration modes of the f1, f2 of when Lh is relatively long (Lh ≒ λ 2/4) .
【図８】本発明の第３の実施形態に係る超音波処置具の
振動伝達部材の要部側面図である。FIG. 8 is a side view of a main part of a vibration transmission member of an ultrasonic treatment device according to a third embodiment of the present invention.
２…振動伝達部材 ４…超音波振動子 １５…処置部 2: Vibration transmitting member 4: Ultrasonic vibrator 15: Treatment unit
Claims (2)
と、超音波振動子に着脱自在に取り付けられ且つ超音波
振動を先端の処置部に伝達する振動伝達部材とから構成
される超音波処置具において、 駆動周波数によらず、振動伝達部材の先端処置部におけ
る振動速度がほぼ等しいことを特徴とする超音波処置
具。1. An ultrasonic wave comprising: an ultrasonic vibrator which can be driven at a plurality of frequencies; and a vibration transmitting member which is detachably attached to the ultrasonic vibrator and transmits ultrasonic vibration to a treatment section at a distal end. An ultrasonic treatment device, wherein the vibration speed at the distal treatment portion of the vibration transmission member is substantially equal regardless of the drive frequency.
と、超音波振動子に着脱自在に取り付けられ且つ超音波
振動を先端の処置部に伝達する振動伝達部材とから構成
される超音波処置具において、 駆動周波数によらず、振動速度変換率がほぼ等しくなる
ホーンを振動伝達部材に具備したことを特徴とする超音
波処置具。2. An ultrasonic wave comprising: an ultrasonic vibrator which can be driven at a plurality of frequencies; and a vibration transmitting member which is detachably attached to the ultrasonic vibrator and transmits ultrasonic vibration to a treatment section at a distal end. An ultrasonic treatment device, comprising: a vibration transmission member having a horn whose vibration speed conversion rate is substantially equal regardless of a driving frequency.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP36294299A JP2001170066A (en) | 1999-12-21 | 1999-12-21 | Ultrasonic treatment tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP36294299A JP2001170066A (en) | 1999-12-21 | 1999-12-21 | Ultrasonic treatment tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2001170066A true JP2001170066A (en) | 2001-06-26 |
Family
ID=18478125
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP36294299A Pending JP2001170066A (en) | 1999-12-21 | 1999-12-21 | Ultrasonic treatment tool |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2001170066A (en) |
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