JPH10295700A - 外科手術用具 - Google Patents

外科手術用具

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Publication number
JPH10295700A
JPH10295700A JP9109320A JP10932097A JPH10295700A JP H10295700 A JPH10295700 A JP H10295700A JP 9109320 A JP9109320 A JP 9109320A JP 10932097 A JP10932097 A JP 10932097A JP H10295700 A JPH10295700 A JP H10295700A
Authority
JP
Japan
Prior art keywords
ultrasonic vibration
tip
liquid
working
rear end
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
Application number
JP9109320A
Other languages
English (en)
Inventor
Shigeo Ito
重雄 伊藤
Shinetsu Harada
新悦 原田
Yukimasa Yamaguchi
幸正 山口
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.)
Sumitomo Bakelite Co Ltd
Original Assignee
Sumitomo Bakelite 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 Sumitomo Bakelite Co Ltd filed Critical Sumitomo Bakelite Co Ltd
Priority to JP9109320A priority Critical patent/JPH10295700A/ja
Publication of JPH10295700A publication Critical patent/JPH10295700A/ja
Pending legal-status Critical Current

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  • Surgical Instruments (AREA)

Abstract

(57)【要約】 【課題】超音波ホーン自体の熱劣化を防止し、細かい作
業に適し、深部まで挿入できて、骨等の硬組織を精密で
安全に切削することのできる外科手術用具を提供する。 【解決手段】長さ方向に延びた液体通路を有する振動伝
達具の先端作業部を、断面積が一定で直線状の挿入部7
の先端部に、長さ方向の軸に対して凹形状部3を設けた
形状にし、挿入部の後方近傍に開口した液体噴出孔6
は、作業部先端方向にイリゲーション液を噴出するよう
にした。

Description

【発明の詳細な説明】
【0001】
【発明の属する技術分野】本発明は、超音波振動により
生物組織の骨化した組織、硬組織等を切削、分離する外
科手術用具に関するものである。
【0002】
【従来の技術】従来、生物組織、特に硬骨組織及び軟骨
組織の切削には外科用メスが用いられているが、頸椎等
の手術では精密な作業が要求されるために、長時間を有
し、手術者に多大の労力がかかり、且つ切断分離に高度
の技術を必要とすると言う欠点があった。また、超音波
を利用した外科手術用具も多数開発されており、超音波
振動源に接続された作業部を超音波振動させ、接触した
生物組織を破砕し、吸引除去する為の外科手術用具(例
えば、特公昭47−39197号公報)が知られてい
る。しかし、前述の破砕、吸引除去するための外科手術
用具などは、硬い生物組織を切削するには不適当であっ
たり、また押しながら精密切削が必要な部位に対しては
切削位置が予定部位よりずれてしまい周囲の組織を傷つ
けてしまうという恐れがあった。
【0003】
【発明が解決しようとする課題】本発明は、従来の外科
手術用具のこのような問題点を解決することを目的とし
たもので、ホーンの発熱によるホーン自体が劣化すると
いう問題を解消すると共に切削部の位置を確認しなが
ら、かつ視野を確保し、超音波振動による先端作業部の
位置ずれをおこさず、細かい作業を安全に行うのに適し
た形状の外科手術用具を提供しようとするものである。
【0004】
【課題を解決するための手段】即ち本発明は、超音波振
動により生体組織の骨化した組織もしくは硬組織を切
削、分離する外科手術装置の、先端部は超音波振動の腹
となり生体組織に接する作業部を有し、長さ方向に延び
た液体通路を有する振動伝達具であって、該作業部は、
振動の腹となる先端部が凹形状となし、該凹部に続く後
端側近傍には挿入部を有し、さらに好ましくは該液体通
路の先端側には、該挿入部の後方近傍或いは凹部中央近
傍に開口し、該作業部の先端方向にイリゲーション液を
噴出する液体噴出孔を設けたことを特徴とする外科手術
用具である。
【0005】
【発明の実施の形態】以下、図面を参照して、本発明を
詳細に説明する。図1は本発明の一実施例となる外科手
術用具の全体を示す図で、図2はその先端作業部の形状
を示す図である。振動伝達具(1)は、後端部の接続ネ
ジ(4)により同じ共振周波数の超音波振動源(図示し
ていない)に接続され、超音波振動源に共振周波数の高
周波電力を加えることにより発生させた超音波振動を、
先端の作業部(2)を介して生物組織に伝える。超音波
振動源と振動伝達具(1)の接続は、超音波振動の腹面
で行えば、ネジ接続の他、溶接、圧着等の方法が可能で
あり、特に限定されない。また、振動伝達具自体にネジ
部を設けず、袋ナット等を用いて接続しても良い。
【0006】超音波振動源としては、内部に液体通路を
有する電歪型、磁歪型のいずれの振動子も使用でき、特
に限定はされないが、電気、機械変換効率の優れた電歪
型動子を用いるのが好ましい。超音波振動源で発生した
超音波振動は、振動伝達具(1)によって伝達拡大さ
れ、作業部(2)の先端で最大振幅となるが、その振幅
は、100〜200μmに達する。これ以上に振幅を上
げると、切削速度はより大きくなるが、切削部の焦げや
作業部(2)の耐久性の劣化、切削音が大きい等の問題
を生ずるので、上限振幅は200μm程度とするのが好
ましいが、技術的には特に限定されるものではない。ま
た、共振周波数は20〜45KHzが好ましく、22〜
40KHzで特に良い振動が得られる。
【0007】振動伝達具(1)の内部には、超音波振動
源内部の液体通路に連通して長さ方向に延びた液体通路
(5)を有し、液体通路(5)の先端側は作業部(2)
の後方近傍に設けられた液体噴出孔(6)で開口してい
る。そして、作業部(2)の形状は、図2に示したよう
に、断面積が一定で直線状をなす挿入部(7)の先端部
に、凹形状部(3)が設けられている。
【0008】図3は、振動伝達具(1)の断面積を変化
させて、超音波振動の振幅を拡大させる形状の例を示し
たものであるが、切削に必要な振幅が振動体で発生した
振幅にほぼ等しい場合には、作業部(2)までの断面積
を変化させずに、(c)図に示すように細い形状にする
のが狭い箇所での作業に適し、また視野を確保でき良
い。図3(a)(b)のように、振動伝達具(1)の後
方側の径を太くする場合でも先端側は細くする。さらに
それに続く挿入部(7)は、特に限定はされないが、超
音波振動に対する耐久性や、施術対象となる脊椎等の生
体構造に応じて先端から3〜50mmの範囲で断面積を
一定にするのが良い。これによって、先端の作業部
(2)を狭い場所で深く挿入することができる。挿入部
(7)の外径形状は、特に限定されるものではなく、円
筒形や、図2に示すような角柱形、角椎形等の対称形で
あればいずれでも良い。
【0009】作業部(2)あるいは挿入部(7)の幅
は、術式や、生体の施術対象部位によっても異なるが、
刃形状とは異なり、1.5〜4.0mm程度とするのが
好ましい。また、作業部(2)の先端には凹形状部
(3)が設けられていて、施術時には、図4に示したよ
うに、荒削りした後の生体組織(9)の角部に接触面
(8)を押し当て位置決めを行い、切削する構造となっ
ている。また、表面からの溝状削開も可能であり、その
際凹型の形状により位置ズレをおこさず安全性に優れて
いる。その為少ない力で削除、削開が可能であり更に安
全性が高くなる。凹形状部の(3)の深さ形状は特に限
定されず、接触面(8)を生体組織に押し当て超音波振
動を加えても位置がずれない形状であればよい。また、
接触面(8)は平面には限らず曲面でも良い。
【0010】作業部(2)あるいは挿入部(7)の後方
近傍に設けられた液体噴出孔(6)は、作業部(2)の
先端の方向に向かってイリゲーション液を噴出するよう
に調整されていれば、液体噴出孔(6)の開口位置は特
に限定されない。しかし作業性からみて開口位置は作業
部凹部中央近傍が望ましい。イリゲーション液の液体噴
出孔(6)より超音波振動によって噴出したイリゲーシ
ョン液は、図4に示すように、作業部(2)先端もしく
は生体組織(9)の切削部位周辺に噴出し、超音波振動
によって切削する際の摩擦熱の冷却と、術部の洗浄に使
用される。また、液体噴出孔(6)の開口径について
は、特に限定はないが、液体通路(5)の直径より小さ
い方が好ましい。
【0011】
【発明の効果】本発明の従うと超音波振動により生体組
織の骨化した組織や硬組織を切削、分離する作業を従来
の外科手術用具に比べて技術の熟練を必要とせず、かつ
迅速に切断でき、また、長時間連続して高振幅で使用で
きるので外科手術用具として好適である。
【図面の簡単な説明】
【図1】本発明の一実施例となる外科手術用具の全体構
造を示す図である。
【図2】本発明の一実施例となる外科手術用具の、先端
作業部の形状を示す図である。
【図3】本発明の外科手術用具の、振動伝達具後方側の
形状を示す図である。
【図4】本発明の外科手術用具の、使用状況とイリゲー
ション液の噴出方向を示す図である。
【図5】本発明の外科手術用具の使用状況を示す図であ
る。
【図6】本発明の外科手術用具の使用状況を示す図であ
る。
【符号の説明】
1 振動伝達具 2 作業部 3 凹形状部 4 接続ネジ 5 液体通路 6 液体噴出孔 7 挿入部 8 接触面 9 生体組織 10 術者の視野

Claims (2)

    【特許請求の範囲】
  1. 【請求項1】 超音波振動により生体組織の骨化した組
    織もしくは硬組織を切削、分離する外科手術装置の、先
    端部は超音波振動の腹となり生体組織に接する作業部を
    有し、長さ方向に延びた液体通路を有する振動伝達具で
    あって、該作業部は、振動の腹となる先端部が凹形状と
    なし、該凹部に続く後端側近傍には挿入部を有すること
    を特徴とする外科手術用具。
  2. 【請求項2】 液体通路の先端側には、該挿入部の後方
    近傍に開口し、該作業部の先端部の方向にイリゲーショ
    ン液を噴出する液体噴出孔を設けた請求項1記載の外科
    手術用具。
JP9109320A 1997-04-25 1997-04-25 外科手術用具 Pending JPH10295700A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9109320A JPH10295700A (ja) 1997-04-25 1997-04-25 外科手術用具

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9109320A JPH10295700A (ja) 1997-04-25 1997-04-25 外科手術用具

Publications (1)

Publication Number Publication Date
JPH10295700A true JPH10295700A (ja) 1998-11-10

Family

ID=14507245

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9109320A Pending JPH10295700A (ja) 1997-04-25 1997-04-25 外科手術用具

Country Status (1)

Country Link
JP (1) JPH10295700A (ja)

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