JPH0464351A - 超音波治療装置 - Google Patents

超音波治療装置

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Publication number
JPH0464351A
JPH0464351A JP2176322A JP17632290A JPH0464351A JP H0464351 A JPH0464351 A JP H0464351A JP 2176322 A JP2176322 A JP 2176322A JP 17632290 A JP17632290 A JP 17632290A JP H0464351 A JPH0464351 A JP H0464351A
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JP
Japan
Prior art keywords
ultrasonic
rotating member
vibration
blade
tip
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.)
Granted
Application number
JP2176322A
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English (en)
Other versions
JP2987175B2 (ja
Inventor
Tetsumaru Kubota
窪田 哲丸
Tatsuya Kubota
達也 久保田
Mitsumasa Okada
光正 岡田
Hiroaki Kagawa
裕昭 加川
Hiroyuki Kusunoki
楠 博幸
Tomonao Sakurai
友尚 桜井
Toshihiko Suzuta
敏彦 鈴田
Koji Kanbara
神原 浩司
Kenji Yoshino
吉野 謙二
Tadao Hagino
萩野 忠夫
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Olympus Corp
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Olympus Optical Co Ltd
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Publication date
Application filed by Olympus Optical Co Ltd filed Critical Olympus Optical Co Ltd
Priority to JP2176322A priority Critical patent/JP2987175B2/ja
Publication of JPH0464351A publication Critical patent/JPH0464351A/ja
Application granted granted Critical
Publication of JP2987175B2 publication Critical patent/JP2987175B2/ja
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。

Description

【発明の詳細な説明】 [産業上の利用分野] この発明は組織切除用の外刃と内刃とを備えた超音波治
療装置に関する。
[従来の技術] 一般に、超音波治療装置として手元側のハンドピース内
に超音波振動子が配設されるとともに、このハンドピー
スに連結された外套管内に振動伝達部材が挿通され、超
音波振動子で発生する超音波振動がこの振動伝達部材を
介して先端部側に伝達される構成のものが知られている
。この場合、超音波振動子は例えばPZT等の圧電素子
と電極とか積層状態で連結されて構成されている。さら
に、この超音波振動子には略円錐形状のホーンが連結さ
れ、このホーンの先端には管体によって形成された振動
伝達部材か連結されている。そして、超音波振動子で発
生させた超音波振動はホーンおよび振動伝達部材によっ
て生体組織および結石等の破砕作業に必要な振幅に増幅
されるようになっており、この超音波治療装置の使用時
には振動伝達部材の先端を体腔内にある結石や生体組織
等に押し当てて超音波振動させることにより、結石を破
砕したり、生体組織を切除したりするようになっている
ところで、この種の超音波治療装置として例えば実開昭
60−3.7310号公報に示されているように超音波
振動子の基端部側に電動モータを連結し、このモータに
よって振動伝達部材を超音波振動子とともに一体的に回
転させることにより、生体組織の切除を効率よく行なう
構成のものか開発されている。
[発明が解決しようとする課題] 従来構成のものにあっては手元側の/\ンドピース内に
配設された超音波振動子の基端部側に電動モータが連結
されていたので、ノ1ンドビースが大形化するとともに
、重量が大きくなり、操作性が悪くなる問題があった。
この発明は上記事情に着目してなされたもので、ハンド
ピースを小形軽量化することができ、操作性の向上を図
ることができる超音波治療装置を提供することを目的と
するものである。
[課題を解決するための手段] この発明は先端部近傍に外刃が形成された外套管と、こ
の外套管の内部に挿通され、手元側の超音波振動子から
の超音波振動を伝達する振動伝達部材と、この振動伝達
部材の先端部側に回転可能に連結され、前記外刃と対応
する部位に内刃が形成された回転部材と、超音波振動に
よってこの回転部材を前記振動伝達部材の周方向に沿っ
て回転駆動する超音波モータとを備えたものである。
[作用コ 内刃が形成された回転部材を超音波モータによって振動
伝達部材の周方向に沿って回転駆動し、外套管の先端部
近傍に形成された外刃とこの回転部材の内刃とによって
生体組織を切除することにより、ハンドピースを小形軽
量化して操作性の向上を図るようにしたものである。
[実施例] 以下、この発明の第1の実施例を第1図乃至第3図を参
照して説明する。
第2図は超音波治療装置1の概略構成を示すもので、2
はこの超音波治療装置1の/%ンドビース部である。こ
のハンドピース部2の内部にはランジュバン型の超音波
振動子3が収容されている。
この超音波振動子3には例えばPZT等の圧電素子と電
極とか交互に積層されている。また、この超音波振動子
3の前部には略円錐形状のホーン4、この超音波振動子
3の後部には裏打ち板5がそれぞれ配置されている。こ
の場合、ホーン4の後端面中央部位には取付は軸として
のボルト6の一端部が螺着されている。このボルト6は
超音波振動子3の圧電素子、電極および裏打ち板5の各
中心部にそれぞれ形成されたボルト挿通孔内に挿通され
ている。そして、このボルト6の他端部は裏打ち板5の
後方に延出されており、この延出端部にナツト7が螺着
されてホーン4、超音波振動子3の圧電素子、電極およ
び裏打ち板5が連結状態で保持固定されている。
また、ホーン4の前端部には管体によって形成された振
動伝達部材8が着脱可能に連結されている。さらに、こ
の振動伝達部材8の管内には吸引管路9が形成されてい
る。この吸引管路9にはホーン4およびボルト6の軸心
部に形成された吸引管路10が連結されている。
また、振動伝達部材8の周囲は外套管11によって覆わ
れている。この外套管11の基端部はノ\ンドビース部
2に連結されている。さらに、この外套管11の先端部
には生体組織の切除を行なう外刃12が形成されている
。この外刃12は外套管11の先端部に形成された略矩
形状の開口部の端縁部によって形成されている。
また、振動伝達部材8の先端部側には円筒状の回転部材
13が回転可能に連結されている。この回転部材13に
は外套管11の外刃12と対応する部位に内刃14が形
成されている。この内刃14は略矩形状の開口部の端縁
部によって形成されている。
さらに、この回転部材13は第3図に示す円環形超音波
モータ15によって振動伝達部材8の周方向に沿って回
転駆動されるようになっている。
この円環形超音波モータ15のステータ16には金属材
料によって形成されるリング状の振動体16aの底面に
圧電素子16bが接着されている。
この圧電素子16bは円周方向に沿って多数に分割して
正負交互に分極処理されており、これらに対応して2組
の電極群が設けられている。さらに、このステータ16
のリング状振動体16の上面には超音波モータ15のロ
ータ17を形成するリング状の移動体17aが加圧接触
されている。この場合、振動伝達部材8の先端部には第
1図に示すように小径な突設部18が突設されている。
この突設部18の外周面にはリング状の溝19が形成さ
れている。そして、この突設部18のリング状溝1つ内
に回転部材13の基端部が回転可能に連結されている。
さらに、回転部材13の基端部には内方向に突設された
リング状の係合部20か形成されている。そして、この
係合部20が振動伝達部材8のリング状溝19内に挿入
された状態で係合されており、この係合部20によって
超音波モータ15のリング状移動体17aが形成されて
いる。また、超音波モータ15のステータ16は振動伝
達部材8の突設部18によって形成されるリング状の段
部21に装着されている。
なお、第1図中で、22はハンドピース部2内のホーン
4に形成された振動伝達部材8の着脱部、23はこのハ
ンドピース部2に設けられた送水口である。
次に、上記構成の作用について説明する。
まず、超音波治療装置1の使用時に生体組織の切除作業
を行なう場合には第1図に示すように外套管11の外刃
12の開口部と回転部材13の内刃14の開口部とを合
致させた状態でこれらの開口部内に切除対象となる生体
組織を挿入する。そして、この状態で円環形超音波モー
タ15を駆動し、回転部材13を振動伝達部材8の周方
向に沿って回転させる。このように回転部材13が回転
すると外套管11の外刃12とこの回転部材13の内刃
14とによってこれらの両開口部内に挿入された生体組
織が切除される。
そこで、上記構成のものにあっては内刃14が形成され
た回転部材13を超音波モータ15によって振動伝達部
材8の周方向に沿って回転駆動し、外套管11の先端部
近傍に形成された外刃12とこの回転部材13の内刃1
4とによって生体aatを切除するようにしたので、従
来のようにノ\ンドピース部2内に配設された超音波振
動子3の基端部側に電動モータを連結させた場合に比べ
て/%ンドピース部2を小形軽量化して操作性の向上を
図ることができる。
また、第4図および第5図はこの発明の第2の実施例を
示すものである。
これは、第4図に示すようにハンドピース部2の内部に
配設された超音波振動子31として第5図に示すように
一面側に2分割された電極33゜34が形成され、他面
側に共通電極35が形成されるとともに、各電極33.
34毎に分極方向を反転させた2組の圧電素子32を設
け、この超音波振動子31によって超音波モータ15の
ステータを兼用させるようにしたものである。この場合
、2組の圧電素子32.32の各電極33.34間の分
割部36を一致させ、残留分極の方向を対向させてU字
状に形成された2個の電極板37゜38を間にして電極
33.34を重ね合わせ、中心部に絶縁筒39を挿通さ
せている。そして、方の圧電素子32の共通電極35の
面にはホーン4、他方の圧電素子32の共通電極35の
面には共通電極板40かそれぞれ接合され、この共通電
極板40には裏打ち板5を接合させてボルト6によって
これらを一体的に固定させている。さらに、電極33.
34と共通電極35とには電極板37゜38と共通電極
板40とを介して図示しない駆動制御回路か接続されて
いる。
そこで、上記構成のものにあっては共通電極板40に対
して電極板37.38に位相制御可能な駆動電源を接続
させ、その駆動周波数をたわみ共振周波数に調節する。
そして、その位相差をOにして駆動することにより、励
振電圧を2組の圧電素子32に同一に印加させ、一方が
延びたとき他方が縮む状態のたわみ共振振動を行なわせ
てホーン4に連結された振動伝達部材8の出力端部に軸
に直角方向の直線運動を行なわせるようになっている。
この場合、一方の電極板37に対し、他方の電極板38
に印加する駆動電圧の位相を変化させることにより、振
動伝達部材8の出力端部8aの振動状態を変化させるこ
とができるようになっている。さらに、この振動伝達部
材8の出力′端部8aには第1の実施例と略同様の回転
部材13によって形成される超音波モータ15のロータ
が加圧接触されており、このロータに形成された略矩形
状の開口部の端縁部によって内刃14が構成されている
したがって、上記構成のものにあっては内刃14が形成
されたロータを超音波モータ15によって振動伝達部材
8の周方向に沿って回転駆動し、外套管11の先端部近
傍に形成された外刃12とこのロータの内刃14とによ
って生体組織を切除するようにしたので、第1の実施例
と略同様にハンドピース部2を小形軽量化して操作性の
向上を図ることができる。
さらに、第6図はこの発明の第3の実施例を示すもので
ある。
これは、第1の実施例の円環形超音波モータ15のステ
ータ16の電極構造を変形させたものである。すなわち
、このステータ16の圧電素子16bには半径方向に分
割された2組の電極群51、.52か設けられている。
この場合、内周部側の電極群51と外周部側の電極群5
2とは幾何学的にπ/2の位相の異なる振動を励振でき
るように配置されている。
したがって、この場合には超音波モータ15の動作特性
を向上させることができるので、操作性の一層の向上を
図ることができる。
なお、この発明は上記各実施例に限定されるものではな
い。
例えば、第7図に示すように第1の実施例の外套管26
の先端部に形成された外刃27aの開口部61の端縁形
状を略波形に形成しても良く、また第8図に示すように
開口部62の端縁形状か略楕円形の外刃27b1或いは
第9図に示すように開口部63の端縁形状が略矩形の外
刃27cを使用しても良い。さらに、第10図および第
11図に示すように第1の実施例の外套管26の先端部
に傾斜状の切欠部71を設け、この切欠部71から外部
側に突没可能に設けられた略球状の研磨具72゜73を
それぞれ第1の実施例の超音波モータ15によって回転
駆動する構成にしても良く、また第12図に示すように
略円柱状の研磨具74を第1の実施例の超音波モータ]
5によって回転駆動する構成にしても良い。
さらに、その他この発明の要旨を逸脱しない範囲で種々
変形実施できることは勿論である。
[発明の効果コ この発明によれば内刃が形成された回転部材を超音波モ
ータによって振動伝達部材の周方向に沿って回転駆動し
、外套管の先端部近傍に形成された外刃とこの回転部材
の内刃とによって生体組織を切除するようにしたので、
ハンドピースを小形軽量化することができ、操作性の向
上を図ることができる。
【図面の簡単な説明】
第1図乃至第3図はこの発明の第1の実施例を示すもの
で、第1図は超音波治療装置の要部構成を示す縦断面図
、第2図は超音波治療装置の概略構成を示す縦断面図、
第3図は円環状超音波モータの概略構成を示す斜視図、
第4図および第5図はこの発明の第2の実施例を示すも
ので、第4図は超音波振動子の装着状態を示す縦断面図
、第5図は圧電素子を示す斜視図、第6図はこの発明の
第3の実施例の電極構造を示す平面図、第7図乃至第1
2図はそれぞれ異なる他の実施例の要部構成を示す斜視
図である。 2・・・ハンドピース部、3・・・超音波振動子、8・
・・振動伝達部材、11・・・外套管、12・・・外刃
、13・・・回転部材、14・・・内刃、15・・・超
音波モータ。 出願人代理人 弁理士 坪井  淳 第 図 ムn 第 図 第 図 第 図 第 図 第 図 第 図

Claims (1)

  1. 【特許請求の範囲】 先端部近傍に外刃が形成された外套管と、 この外套管の内部に挿通され、手元側の超音波振動子か
    らの超音波振動を伝達する振動伝達部材と、 この振動伝達部材の先端部側に回転可能に連結され、前
    記外刃と対応する部位に内刃が形成された回転部材と、 超音波振動によってこの回転部材を前記振動伝達部材の
    周方向に沿って回転駆動する超音波モータと を具備したことを特徴とする超音波治療装置。
JP2176322A 1990-07-05 1990-07-05 超音波治療装置 Expired - Fee Related JP2987175B2 (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2176322A JP2987175B2 (ja) 1990-07-05 1990-07-05 超音波治療装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2176322A JP2987175B2 (ja) 1990-07-05 1990-07-05 超音波治療装置

Publications (2)

Publication Number Publication Date
JPH0464351A true JPH0464351A (ja) 1992-02-28
JP2987175B2 JP2987175B2 (ja) 1999-12-06

Family

ID=16011559

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2176322A Expired - Fee Related JP2987175B2 (ja) 1990-07-05 1990-07-05 超音波治療装置

Country Status (1)

Country Link
JP (1) JP2987175B2 (ja)

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