JPH0595955A - 超音波治療装置 - Google Patents

超音波治療装置

Info

Publication number
JPH0595955A
JPH0595955A JP3259476A JP25947691A JPH0595955A JP H0595955 A JPH0595955 A JP H0595955A JP 3259476 A JP3259476 A JP 3259476A JP 25947691 A JP25947691 A JP 25947691A JP H0595955 A JPH0595955 A JP H0595955A
Authority
JP
Japan
Prior art keywords
transmitting member
vibration transmitting
ultrasonic
vibration
sheath
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.)
Withdrawn
Application number
JP3259476A
Other languages
English (en)
Inventor
Hiroaki Kagawa
裕昭 加川
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Olympus Corp
Original Assignee
Olympus Optical Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Olympus Optical Co Ltd filed Critical Olympus Optical Co Ltd
Priority to JP3259476A priority Critical patent/JPH0595955A/ja
Publication of JPH0595955A publication Critical patent/JPH0595955A/ja
Withdrawn legal-status Critical Current

Links

Abstract

(57)【要約】 【目的】振動伝達部材とシ−スが摺接しても、摩擦によ
り振動伝達部材の側面が磨耗するのを防止できる超音波
治療装置を提供すること。 【構成】超音波振動子6と、超音波振動子6に連結され
た振動伝達部材12と、超音波振動子6を覆う振動子カ
バ−10と、振動子カバ−10に連結され、振動伝達部
材12の先端部を除いて振動伝達部材12を覆うシ−ス
32とを備え、超音波振動子6で発生した超音波振動に
よる被処置部の治療と、振動伝達部材12に高周波電流
を流し、高周波電流による被処置部の治療とが可能な超
音波治療装置において、振動伝達部材12の側面の少な
くとも一部分に表面硬化処理を施したことを特徴として
いる。

Description

【発明の詳細な説明】
【0001】
【産業上の利用分野】本発明は、超音波振動によって生
体内の患部組織を切除する等の処置を行う超音波治療装
置に関する。
【0002】
【従来の技術】一般に、超音波治療装置は、超音波振動
子の先端に振動伝達部材を連結して構成され、超音波振
動子と振動伝達部材とは、振動子カバ−とシ−スによっ
て各々覆われている。そして、振動伝達部材の先端を患
部組織に接触させ、超音波振動子で発生する超音波振動
を振動伝達部材から患部組織に伝達し、それによって例
えば患部組織を切除するように構成されている。
【0003】このような超音波治療装置を用いて生体組
織を切除する際には、切除した組織から出血がしばしば
起こる。そこで、特開平3−139343号公報には、
出血が発生した際に振動伝達部材に高周波電流を流すこ
とで、組織の止血を行う技術が示されている。
【0004】
【発明が解決しようとする課題】従来の超音波治療装置
を用いて生体組織を切除し、止血を行う場合、超音波振
動している振動伝達部材の側面と振動伝達部材を覆うシ
−スの内面とが接触すると、その摩擦により接触した部
分の振動伝達部材が磨耗し、破損に至るおそれがある。
【0005】本発明は上記課題に着目してなされたもの
であり、その目的は振動伝達部材とシ−スとが接触して
も、摩擦により振動伝達部材の側面が磨耗するのを防ぐ
とともに、組織から出血した際に振動伝達部材に高周波
電流を流すことで、組織の止血を行うことが可能な超音
波治療装置を提供することにある。
【0006】
【課題を解決するための手段】発明の超音波治療装置
は、超音波振動子と、この超音波振動子に連結された振
動伝達部材と、前記超音波振動子を覆う振動子カバ−
と、この振動子カバ−に連結され、前記振動伝達部材の
先端部を除いて振動伝達部材を覆うシ−スとを備え、前
記超音波振動子で発生した超音波振動による被処置部の
治療と、前記振動伝達部材に高周波電流を流し、この高
周波電流による被処置部の治療とが可能な超音波治療装
置において、前記振動伝達部材の側面の少なくとも一部
分に表面硬化処理を施したことを特徴としている。
【0007】
【作用】本発明の超音波治療装置では、振動伝達部材の
側面に施された表面硬化処理により、例えば被処置部の
治療中に振動伝達部材に横方向の強い力が作用したり、
ハンドピ−ス組立て時に振動伝達部材の中心軸とシ−ス
の中心軸がずれて、振動伝達部材とシ−スが摺接して
も、表面の摩擦により振動伝達部材が磨耗することはな
い。
【0008】
【実施例】以下、図面を参照しながら本発明の実施例に
ついて説明する。
【0009】図1及び図2は本発明の第1の実施例を示
している。
【0010】図1に示すように、この超音波治療装置は
生体内の患部組織の治療時に使用されるハンドピ−ス2
を備え、このハンドピ−ス2の把持部4には、ランジュ
バン型の超音波振動子6が設けられ、この超音波振動子
6は、超音波振動の振幅を増幅するためのホ−ン9と、
圧電素子と電極とを交互に積層して形成された振動発生
部8とを備えている。振動発生部8は図示しないボルト
とナットによってホ−ン9に締め付け固定されている。
ホ−ン9の後端部外周にはフランジ9aが突設され、こ
のフランジ9aは、超音波振動子6を覆う振動子カバ−
10に対して固定されている。振動発生部8の電極に
は、超音波電源コ−ド11のリ−ド線11aが接続さ
れ、超音波電源ユニット15に接続されている。
【0011】また、ホ−ン9の先端には、金属製の中空
パイプからなる振動伝達部材12が固着されている。ホ
−ン9および振動発生部8には貫通孔が形成され、この
貫通孔と連通する振動伝達部材12の中空孔と共に吸引
通路14を形成している。この吸引通路14は、振動子
カバ−10を貫通して設けられた吸引口金16に連通
し、この吸引口金16には、吸引チュ−ブ18を介して
吸引ビン20が接続されている。さらに、吸引ビン20
には、吸引ポンプユニット22が接続されている。 上
記ホ−ン9には、高周波電源コ−ド24のリ−ド線24
aが接続され、この高周波電源コ−ド24を介して高周
波電源ユニット26が接続されている。従って、ホ−ン
9に固着されている振動伝達部材12に高周波電流を通
電することができる。また、高周波電源ユニット26に
はPコ−ド28を介して生体側電極としてのPプレ−ト
30が接続されている。このPプレ−ト30は、生体組
織Aに接触させて使用される。
【0012】上記振動子カバ−10の前部には、振動伝
達部材12を覆うシ−ス32が装着されている。このシ
−ス32の後端部には、シ−ス32と振動伝達部材12
との間の送水路33に連通する送水口金34が設けら
れ、この送水口金34には送水チュ−ブ36を介して送
水タンク38が接続されている。この送水チュ−ブ36
の途中には、ロ−ラ−ポンプからなる送水ポンプ40が
取付けられ、この送水ポンプ40により送水路33に生
理食塩水等の灌流液を供給し、シ−ス32の先端から放
出することができる。
【0013】上記振動伝達部材12は、チタン合金等の
金属で形成され、ホ−ン9に通電された高周波電流をシ
−ス32から突出している先端部12aまで伝達できる
ようになっている。そして、振動伝達部材12の側面全
体には、イオンプレ−ティング、スパッタリング等の物
理蒸着(PVD)法やプラズマCVD等の化学蒸着(C
VD)法等によりセラミックコ−ティング42が施され
ている。コ−ティングの材質は窒化チタン、炭化チタ
ン、炭窒化チタン等が用いられる。これらの材質は電気
抵抗が小さく金属と同程度なので、高周波電流はコ−テ
ィング42を通して通電可能である。
【0014】また、コ−ティングの代わりに振動伝達部
材12の側面にイオン窒化、イオン注入、侵炭等の浸透
拡散処理を施して表面を硬化させてもよい。
【0015】このように構成された超音波治療装置で
は、振動発生部8で励起された超音波振動は、ホ−ン9
によって増幅され、振動伝達部材12を介して伝達され
る。そして、振動伝達部材12の先端が超音波振動する
ことにより、これに接触する患部組織Aの切除を行い、
また、これと同時にシ−ス32と振動伝達部材12との
間の送水路33を通じて送水タンク38から灌流液を供
給するとともに、吸引通路14を通じて吸引ポンプユニ
ット22によって吸引を行うことができる。
【0016】そして、このような生体組織の切除時にお
いて、生体組織から出血した場合には、ホ−ン9を介し
て振動伝達部材12に高周波電流を流すと、高周波電流
が出血を起こしている組織に通電され、その凝固作用に
よって止血することができる。 上記振動伝達部材12
には、セラミックコ−ティングが施されているため、例
えば治療操作中に振動伝達部材12に横方向に強い力が
作用したり、ハンドピ−ス組立て時に振動伝達部材12
の中心軸とシ−ス32の中心軸とがずれる等によって、
振動伝達部材12とシ−ス32とが接触し、この状態で
振動伝達部材12が超音波振動したとしても、振動伝達
部材12の側面は磨耗することがない。
【0017】また、コ−ティングの材質としては、電気
抵抗の小さいものが使用されているので、コ−ティング
42が施されている振動伝達部材12の側面を出血して
いる組織に当てて、高周波電流を通電することにより止
血することができる。
【0018】図3は上記振動伝達部材の変形例を示して
いる。この変形例では、振動伝達部材12のシ−ス32
から突出している先端部12bを除く側面全体にアルミ
ナ等の電気抵抗の大きい材質でセラミックコ−ティング
43が施されている。
【0019】このような構成により振動伝達部材12の
表面は、先端部12bを除いて絶縁されるので高周波電
流の漏れを防ぎ、電気安全性が向上する。また、コ−テ
ィングが施されていない部分は、振動伝達部材の先端部
12bのみであるため、高周波電流が通電する範囲が狭
く、正常組織を含む広い範囲を焼灼してしまうのを防ぐ
ことができる。さらに、高周波電流は狭い範囲に集中し
て流れるため凝固の効率が良くなる。
【0020】図4は本発明の第2の実施例を示してい
る。この第2実施例では、シ−ス32の先端部がセラミ
ックス等の耐熱絶縁部材35で形成され、振動伝達部材
12に高周波電流を流した時に発生する熱や振動伝達部
材12の超音波振動により発生する熱によって、シ−ス
先端が焼け焦げたり、溶けたりするような損傷を防止す
ることができる。
【0021】振動伝達部材12の側面には、第1の実施
例と同様にセラミックコ−ティング42が施されてい
る。また、シ−ス先端の耐熱絶縁部材35は、アルミ
ナ、ジルコニア等の非常に硬い材質で形成されている。
従って、絶縁部材と金属製の振動伝達部材が摺接した場
合には、振動伝達部材の表面が簡単に磨耗してしまう
が、本実施例では振動伝達部材の側面に施されたセラミ
ックコ−ティング42により、表面の磨耗はほとんど防
止できる。
【0022】なお、コ−ティングの範囲は必ずしも振動
伝達部材12の側面全体に施さなくても良く、図4に示
すように耐熱絶縁部材35と摺接する部分付近のみに施
しても十分な効果が得られる。
【0023】上記第2の実施例の超音波治療装置を内視
鏡下手術で用いる場合、耐熱絶縁部材35は、白色系の
酸化物系セラミックスでできているため、内視鏡で術部
を観察しているとハレ−ションが発生し、観察が困難に
なり危険である。そこで、耐熱絶縁部材35を窒化ケイ
素、炭化ケイ素、サイアロン等の黒色あるいは灰色の非
酸化物系セラミックスで形成することにより、ハレ−シ
ョンを防止することができる。
【0024】また、ハレ−ションはシ−ス32でも発生
する可能性がある。そこで、シ−スを黒く着色した弗素
樹脂やポリサルホン、変性PPE等の樹脂で形成した
り、ガラス繊維やカ−ボン繊維、セラミックス繊維等を
混ぜて表面に凹凸を形成すると共に、強度を向上させた
繊維強化プラスチックで形成することにより、シ−スに
よるハレ−ションを防止してより良い視野を得ることも
できる。
【0025】なお、ハレ−ションの防止には、シ−ス3
2や耐熱絶縁部材35の材質を変更する代わりに黒色も
しくは灰色の塗装を施してもよい。
【0026】
【発明の効果】以上説明したように、本発明の超音波治
療装置では、振動伝達部材の側面の少なくとも一部分に
表面硬化処理を施したので、例えば患部組織の治療中に
振動伝達部材に横方向の強い力が作用したり、ハンドピ
−ス組立時に振動伝達部材の中心軸とシ−スの中心軸と
がずれて振動伝達部材とシ−スが接触し、この状態で振
動伝達部材を超音波振動させても、振動伝達部材の磨耗
による破損を防止することができる。また、生体組織か
ら出血した時には、振動伝達部材に高周波電流を流して
組織の止血を行うことができる。
【図面の簡単な説明】
【図1】本発明の第1実施例に係わる超音波治療装置の
部分断面図である。
【図2】本発明の第1実施例に係わる超音波治療装置の
全体構成を示すブロック図である。
【図3】第1実施例に係わる超音波治療装置の変形例を
示す要部断面図である。
【図4】本発明の第2実施例に係わる超音波治療装置の
部分断面図である。
【符号の説明】
2…ハンドピ−ス、6…超音波振動子、10…振動子カ
バ−、12…振動伝達部材、32…シ−ス、42…コ−
ティング。

Claims (1)

    【特許請求の範囲】
  1. 【請求項1】 超音波振動子と、この超音波振動子に連
    結された振動伝達部材と、前記超音波振動子を覆う振動
    子カバ−と、この振動子カバ−に連結され、前記振動伝
    達部材の先端部を除いて振動伝達部材を覆うシ−スとを
    備え、前記超音波振動子で発生した超音波振動による被
    処置部の治療と、前記振動伝達部材に高周波電流を流
    し、この高周波電流による被処置部の治療とが可能な超
    音波治療装置において、前記振動伝達部材の側面の少な
    くとも一部分に表面硬化処理を施したことを特徴とする
    超音波治療装置。
JP3259476A 1991-10-07 1991-10-07 超音波治療装置 Withdrawn JPH0595955A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3259476A JPH0595955A (ja) 1991-10-07 1991-10-07 超音波治療装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3259476A JPH0595955A (ja) 1991-10-07 1991-10-07 超音波治療装置

Publications (1)

Publication Number Publication Date
JPH0595955A true JPH0595955A (ja) 1993-04-20

Family

ID=17334611

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3259476A Withdrawn JPH0595955A (ja) 1991-10-07 1991-10-07 超音波治療装置

Country Status (1)

Country Link
JP (1) JPH0595955A (ja)

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JP2011505198A (ja) * 2007-11-30 2011-02-24 エシコン・エンド−サージェリィ・インコーポレイテッド 超音波手術刃
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