JPH07265328A - 電気外科装置用の電極アセンブリ、及びそれを用いた電気外科装置 - Google Patents

電気外科装置用の電極アセンブリ、及びそれを用いた電気外科装置

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JPH07265328A
JPH07265328A JP6293925A JP29392594A JPH07265328A JP H07265328 A JPH07265328 A JP H07265328A JP 6293925 A JP6293925 A JP 6293925A JP 29392594 A JP29392594 A JP 29392594A JP H07265328 A JPH07265328 A JP H07265328A
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shaft
electrode assembly
handpiece
electrosurgical
electrode
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JP3638324B2 (ja
Inventor
Nigel M Goble
マーク ゴーブル ナイジェル
Colin C O Goble
チャールズ オーウェン ゴーブル コリン
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Gyrus Medical Ltd
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
    • A61B18/12—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
    • A61B18/14—Probes or electrodes therefor
    • A61B18/1442—Probes having pivoting end effectors, e.g. forceps
    • A61B18/1445—Probes having pivoting end effectors, e.g. forceps at the distal end of a shaft, e.g. forceps or scissors at the end of a rigid rod
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
    • A61B18/12—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
    • A61B18/14—Probes or electrodes therefor
    • A61B18/1402—Probes for open surgery
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • A61B17/28—Surgical forceps
    • A61B17/29—Forceps for use in minimally invasive surgery
    • A61B2017/2948—Sealing means, e.g. for sealing the interior from fluid entry
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M3/00—Medical syringes, e.g. enemata; Irrigators
    • A61M3/02—Enemata; Irrigators
    • A61M3/0279—Cannula; Nozzles; Tips; their connection means

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  • Health & Medical Sciences (AREA)
  • Surgery (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biomedical Technology (AREA)
  • Otolaryngology (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Plasma & Fusion (AREA)
  • Physics & Mathematics (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Surgical Instruments (AREA)

Abstract

(57)【要約】 （修正有） 【目的】 腹腔鏡器具、及びこれらの器具に用いる電極
アセンブリにおいて、ハンドピースの部分消毒を可能に
し、従来の器具を使った通常の場合に比べてより多数回
利用できるようにする。 【構成】 電気伝導体２０が、シャフトを抜けて電極１
２Ｅから、高周波源との接続を得るために配された装着
部１２Ｍ上の接触へと通っている。装着部は、回転不能
状態にあるハンドピース１０と、ハウジング内に回転可
能に配され、シャフト１２Ｓに固定されたスリーブ１２
ＳＬとに取付けに適したハウジング１２Ｈという形状を
有している。電極と、シャフトと、伝導体の部品と、ス
リーブとが、ハウジングと接触部とに対して、シャフト
の軸を中心として回転可能となるように形成されてい
る。

Description

【発明の詳細な説明】
【０００１】
【産業上の利用分野】本発明は、電気外科用器具に関
し、特に、腹腔鏡器具、及びこれらの器具に用いる電極
アセンブリに関する。
【０００２】
【従来の技術】ハンドピース、そのハンドピースに装着
された管状のシャフトと、（そのシャフトの末端に設け
られた）少なくとも１個の固定又は可動の電極という形
態で電気外科用器具を製造することが知られている。こ
の場合、この電極には、シャフトとハンドピースを通っ
ている導体を経由して高周波電位が供給されている。
【０００３】
【発明が解決しようとする課題】とりわけ腹腔鏡利用の
ための装置においては、前記単数または複数の電極がハ
ンドピースに対して前記シャフトの軸を中心に回転可能
にすれば都合がよい。加えて、個々の外科的行為毎に新
しい電極が利用できるように、電極を取り外して、交換
できるようにするのが普通である。一般に、前記器具の
残りの部分は、消毒可能であり、破棄されるまで何回も
の（通常は１０回）処置に利用される。
【０００４】
【課題を解決するための手段】本発明によると、改良さ
れた電気外科用装置用の電極のアセンブリは、その末端
部に少なくとも１つ電極が設けられた管状シャフトと、
前記シャフトを通って前記電極に接続され且つ前記シャ
フトの基端部に装着された電気伝導体と、前記電気外科
装置のハンドピースに回転不能に取り付けられるように
形成された第１部品と前記シャフトに固定され且つこの
シャフトの軸を中心として前記第１部品に対して回転可
能な第２部品とを有するとともに、前記伝導体が前記第
１部品内に収容された接触部において終結し、前記電極
と前記シャフトと前記電気伝導体の前記シャフトの末端
部内に存する部分と前記第２部品とが前記軸を中心とし
て前記第１部品及び前記接触部に対して回転可能になる
ように形成されている前記電極アセンブリを前記電気外
科装置に着脱可能に装着するための装着部とを備えてい
る。
【０００５】これにより、前記シャフトと電極との前記
ハンドピースに対する回転を許容しつつ、前記電極アセ
ンブリが脱着可能にハンドピースに装着されることが可
能となる。各々の前記接触部を、前記第１部品に対して
固定し、それにより、前記接触部と前記ハンドピース内
の電源供給用伝導体との間の摺動回転接触と同時に生じ
させることなく、シャフト及び電極の回転を可能とする
ことにより信頼性が向上されることが好ましい。
【０００６】このような配置は、前記ハンドピースの部
分消毒を可能にし、結果として、前記ハンドピースは、
従来の器具を使った通常の場合に比べてより多数回利用
できるようになる。加えて、前記電極アセンブリは、電
極と共に完全に消毒され、多数回の利用が可能になる。
したがって、電気外科治療の経費が減免できるようにな
る。前記伝導体は、少なくともその長さ分にわたって柔
軟であることが好ましく、実際にも、ほとんど前記シャ
フトの全長にわたって柔軟である単一の金属部品で形成
されるであろう。
【０００７】２極式の電気外科装置としての、前記電極
アセンブリは、前記シャフトの末端部に装着された２つ
の電極と、互いに絶縁されかつ前記装着部の第１部品内
に収容された２つのそれぞれの接触部とを有した、２つ
のそれぞれの柔軟な伝導体を有する。前記伝導体は、細
長い金属片を嵌入しており、各々の金属片は、スプリン
グ鋼のような弾力性のある材料で形成され、各々の前記
接触部は、前記それぞれの金属片と一体である。
【０００８】前記接触部は、前記ハンドピース内で適正
に位置づけられた接触部に接続する前記装着部の前記第
１部品の外側に設けられるために、前記伝導体の前記シ
ャフトへ延びる部分に対して末端方向へ折り返されてい
る。本発明の好適な実施例においては、前記装着部の前
記第２部品は、前記シャフトの前記基端部に固定された
スリーブであり、回転制御手段が前記スリーブには設け
られている。
【０００９】前記管状ハウジングは各々の前記接触部の
端部を固定する手段を有し、また、前記ハンドピース内
の対応するキー形状を嵌入するための縦方向のキー隆起
またはレールのような、縦方向のキー形状を有してい
る。このことにより、前記電極アセンブリが前記ハンド
ピースに取り付けられ、しかも同時に、前記ハンドピー
スに対する前記ハウジングの回転を防いでいるときに、
前記ハンドピース内への前記ハウジングの摺動挿入が可
能となる。
【００１０】したがって、前記接触部は、前記ハンドピ
ース内での１回または複数回の接触に合わせるために、
所定の回転可能な位置で保持される。前記スリーブを縦
方向内方に位置決めするための、前記ハウジングの内面
の環状レールまたは溝という形態で設けられた不連続部
が存在する。前記ハウジングは、少なくとも２つの部品
からなり、うち１つはカバーであり、この場合、前記不
連続部はこのカバー状に設けられていることが好まし
い。
【００１１】洗浄液を前記シャフトに沿って送水するた
めに、第２部品内に前記シャフト内部に連通した洗浄液
通路が設けられ、この際、前記シャフトの基端部には、
前記シャフト内部をその端部で密封するために柔軟なシ
ール材が配される。
【００１２】本発明は、ハンドピースと、前記ハンドピ
ースに着脱可能に装着された上述したような電極アセン
ブリとからなり、前記ハンドピースは、少なくとも１つ
が前記電極アセンブリの前記接触面と摺動可能に接触す
る接触部を有する電源供給用の電気伝導体を備えた電気
外科装置をも対象としている。
【００１３】前記電極アセンブリの接触部と前記ハンド
ピースの電流供給伝導体の接触部との間の電気的接続
は、前記電極アセンブリが前記ハンドピースに挿入され
または取り外されるときでも、長さ方向あるいは軸方向
での摺動接触により最も良好に達成される。前記接触ま
たは接触部のどちらかを、あるいは双方を、ハンドピー
スや電極アセンブリの寸法の誤差に備えて、弾性的に撓
むように構成してもよい。
【００１４】
【作用】前記電極と前記シャフトと前記電気伝導体の前
記シャフトの末端部内に存する部分と前記第２部品とが
前記軸を中心として前記第１部品及び前記接触部に対し
て回転可能なので、前記シャフトと電極との前記ハンド
ピースに対する回転を供しつつ、前記電極アセンブリが
脱着可能にハンドピースに装着されることが可能とな
る。
【００１５】
【実施例】本発明を、図を参照しつつ説明する。図１か
ら図４によると、本発明による腹腔鏡電気外科用器具
は、ハンドピースを有している。このハンドピースは、
中空の口部１０Ｎを有しいる。この口部１０Ｎには、脱
着可能な電極アセンブリ１２用の収容部１０Ｒが備えら
れている。図１に、ハンドピース収容部１０Ｒの内部に
装着された電極アセンブリが示される。
【００１６】前記電極アセンブリは、前記収容部１０Ｒ
内に収容される、装着部１２Ｍと、前記ハンドピース先
端部１０Ｎの外周面に螺合する止め輪１４とからなって
いる。この装着部１２Ｍは、この装着部１２Ｍの外周面
上に形成された環状隆起をとらえる前記螺合する螺合す
る止め輪１４によって前記収容部１０Ｒで適所に保持さ
れる前記電極アセンブリは、さらに、管状のステンレス
鋼シャフト１２Ｓを備えている。このシャフト１２Ｓの
基端部は、前記装着部１２Ｍ内に固定され、前記シャフ
ト１２Ｓの末端部には、例えば、二極式の電気外科用焼
灼法のための一対の電極１２Ｅが装着されている。
【００１７】前記管状シャフト１２Ｓ内には、一対の柔
軟な電気伝導体２０が通っている。各電気伝導体２０
は、それぞれの電極１２Ｅから、前記装着部１２Ｍの外
周面上に設けられた一体のスプリング鋼接触部２０Ｃへ
延びている。実際には、接触部２０Ｃは、前記装着部１
２Ｍの径方向に対向した両位置に夫々装着されている。
そして、長さ方向のキーレール１２Ｋは、前記ハンドピ
ース１０の収容部１０Ｒ中に形成されたキー溝２２に嵌
入するために前記装着部１２Ｍの下方の面において、一
体にモールド形成されている。このキー溝２２は、図３
において、前記ハンドピース先端の横断面内に見える。
接触部２０Ｃを前記キー溝２２の上方に配置したので、
前記装着部１２Ｍ上において前記キーレール１２Ｋに対
して９０°の位置に配置された両接触部２０Ｃは、図２
及び３に示されるように、前記収容部１０Ｒの対向面上
に収容される。そこでは、両接触部２０Ｃは、前記ハン
ドピース先端部１０Ｎ内に垂直方向に向いた金属製接触
棒２４に接触する。前記ハンドピース１０内の供給伝導
体（図示せず）は、前記接触棒２４を高周波電力の発生
源に接続している。
【００１８】前記電極アセンブリ装着部１２Ｍの前記構
造により、前記電極１２Ｅは、前記接触部２０Ｃと接触
棒２４との相対的位置関係に影響を与えることなしに、
前記管状シャフト１２Ｓとともに前記ハンドピース１０
に対して、このシャフトの軸を中心に回転することがで
きる。
【００１９】図２によれば、前記装着部１２Ｍは、二つ
の主要な部品を有している。第１部品は、第２部品を収
容する伸長されたキャップ形状の環状のハウジング１２
Ｈからなる。第２部品は、前記管状シャフト１２Ｓの基
端部を包囲し、かつそれに固定される、スリーブ１２Ｓ
Ｌから構成される。両方の部品ともプラスチック塑造品
である。前記スリーブ１２ＳＬは、前記ハウジング１２
Ｈ内において前記シャフト１２Ｓの縦軸を中心に回転可
能であって、前記ハウジング１２Ｈ内における長軸方向
位置を定めるための前記ハウジング１２Ｈ内に形成され
た内方環状隆起２８を収容する環状溝２６を有してい
る。 前記スリーブ１２ＳＬは、前記シャフト１２Ｓに
固定されているので、また、上述したように、前記ハウ
ジング１２Ｈは前記ハンドピース１０に対して回転不可
能なように前記ハンドピース先端部１０Ｎ内に装着され
ているので、前記スリーブ１２ＳＬの回転は、前記ハン
ドピース１０に対する前記シャフト１２Ｓの軸を中心と
した前記シャフト１２Sと電極１２Ｅとの回転を生じさ
せる。図１，図２，及び図４に示される前記スリーブ１
２ＳＬの襟部１２Ｃは、前記電極組立品１２が前記ハン
ドピース１０内に装着されたときには、前記ハンドピー
ス先端１０Ｎの端部を越えて露出する。この状態におい
て、前記襟部１２Ｃは、腹腔鏡電気外科用器具使用中の
必要に応じて、前記電極１２Ｅを回転させるために把持
される。
【００２０】回転襟部１２内には、その内部通路３０Ｐ
を前記管状シャフト１２Ｓの内の開口３２にぴったり合
わせた状態にて、一体成形の短い突出パイプ３０が組み
込まれている（図２参照）。これにより、前記管状シャ
フト１２Ｓ内部、及びそこから前記電極１２Ｅ周辺の領
域への、洗浄液の供給が可能となる。
【００２１】図１とともに図４を参照すると、前記装着
部１２Ｍの前記ハウジングは、二つの部分よりなってい
る。このハウジングの主要部品を構成する第１部品１２
ＨＡは、前記ハウジングの全長にわたって延びており、
前記回転襟部１２Ｃ全体を包含している。前記装着部１
２Ｍにおける前記電極１２Ｅから最も遠い端部の領域に
おいて、前記主要部品１２ＨＡは、円筒を半分にした形
状となっている。この円筒の他の半分は、前記主要部品
１２ＨＡ上にスナップではまるカバーとして機能する第
２部品１２ＨＢにより、形成されている。図１及び２を
比較することにより理解されるように、前記ハウジング
１２Ｈの主要部品１２ＨＡ，及びカバー部品１２ＨＢが
前記ハウジング１２Ｈの対向する壁部を形成している場
所に、前記スリーブ１２ＳＬを位置決めするための前記
環状隆起２８が形成されている。そのため、前記隆起２
８の一部は、前記カバー部品１２ＨＢの一特徴部として
形成されている。これにより、図２に示すように、ハウ
ジング１２Ｈの主要部品１２ＨＡ内にスリーブ１２Ｍを
配置し、その位置決め溝２６が前記隆起２８を収容した
状態にて前記スリーブ１２Ｍを固定するように、前記カ
バー部品ＨＢをスナップさせて配置することで、装着部
１２Ｍの組み立てが可能になる。
【００２２】図１，図３，及び図４を参照すると、電極
１２Ｅに接続された電気伝導体２０は、各々、シャフト
１２Ｓ，及び電極１２Ｅの動きを操作するためにシャフ
ト１２Ｓ内に通された操作ロッド３４からこの電気伝導
体２０を絶縁するための絶縁コーティング（図示せず）
がなされた細長いステンレス鋼片として、形成されてい
る。前記シャフト１２Ｓの前記電極１２Ｅから最も離れ
た端部において、前記伝導体は、（例えば、シリコンラ
バー製の）弾性部材からなるシーリングキャップ３６を
通り抜けている。このシーリングキャップ３６は、管状
シャフト１２Ｓの基端部分の内部空間を密にして、通路
３０Ｐを通って供給される洗浄液の漏れを防止するため
に、ハウジング１２Ｈによって、スリーブ１２ＳＬの端
部に外側から押しつけられている。前記電極アセンブリ
をハンドピース１０内の収容部に案内するための略円錐
型のキャップ端部１２ＨＣを有しているといったハウジ
ング１２Ｈのキャップ形状により、上述の締め付けが果
たされるのである。上述したように、接触部２０Ｃは、
図４に示す通り、ハウジング１２Ｈの外側における互い
に正反対の位置に配置されている。実際には、前記接触
部２０Ｃは、前記伝導体２０に一体の部品である。即
ち、各電気伝導体２０の端部がハウジング１２Ｈのエン
ドキャップに形成された夫々のスロット又は開口１２Ｈ
Ｓを通り抜けた範囲において、この電気伝導体２０の絶
縁カバーが除去され、各場合における前記細長い金属片
が外部に露出している。そして、露出した細長い金属片
がハウジング１２Ｈの外面を覆うようにアセンブリの先
端方向に向けて折り返されて、各金属片がハウジング１
２Ｈの窪み内をもう一度アセンブリの基端側を向いて這
うように各金属片の末端部２０Ｅが内側に曲げられてい
る。このようにして、露出した接触部２０Ｃの固定がな
されているのである。図４を参照すれば、スロット１２
ＨＳ，及び前記末端部２０Ｅを収容する窪みがハウジン
グの両パーツ１２ＨＡ，及び１２ＨＢに形成されている
ことは、明らかである。
【００２３】各々の接触部２０Ｃは、前記電極アセンブ
リが前記ハンドピースの収容部１０Ｒ内に挿入されたと
きに、接触棒２４（図２及び３参照）によって前記外周
面１２ＨＯの方に弾性的に撓まされるように、その全長
に亙り、前記ハウジング１２Ｈの外周面１２ＨＯから離
れて位置するように形成されている。
【００２４】前記電極用の前記操作ロッド３４は、ハン
ドピース１０内に取り込まれるように、シールキャップ
３６，及びハウジング１２Ｈのキャップ端部を、貫通し
ている。
【００２５】本実施例による器具を使用のために準備す
るには、その保持リング１４が管状隆起１６回りの適所
に配置されている装着部１２Ｍ（図１）をハンドピース
１０内の収容部１０Ｒに押し込むことにより、消毒済み
の電極アセンブリ１２をハンドピース１０内に装着す
る。この際、そのガイドレール１２Ｋがハンドピース先
端１０Ｎ内のキー溝に係合するように、両接触部２０Ｃ
がハンドピース１０内の互いに対向する側面に向き合わ
せる。この装着部１２Ｍが収容部１０Ｒ内の収容位置
に、完全に押し込まれると、ハンドピースの接触棒２４
は、電極アセンブリの接触部２０Ｃに係合する。これに
より、ハンドピース内の電源供給用導電部と電極１２Ｅ
との間に、電気回路が形成される。図２に示すように、
保持リング１４をハンドピース先端１０Ｎのネジ切りさ
れた外周面上にて回転させることにより、この電極アセ
ンブリはハンドピース内に固定される。保持部１２Ｍの
スリーブ部１２ＳＬは、ハウジング部１２Ｈ内で回転可
能であり，かつ、管状シャフト１２Ｓに固定されている
ので、回転襟部１２Ｃを回転させると、前記電極１２Ｅ
をも回転させられる。これにより、術者は、この器具を
操るとともにそのハンドル１０Ｈを操作するために最も
適した方向にハンドピースを向け続けながら、必要によ
って電極の方向調整を行うことができる。電気伝導体２
０は、管状シャフト１２Ｓの内側を自由に動くことがで
きるので、接触部２０Ｃが回転しなくても、前記電極１
２Ｅは前記シャフトの軸を中心に回転可能である。従っ
て、必然的な接続の確実性向上のために、ハンドピース
内において、接触部２０Ｃと接触棒２４との間をスライ
ド回転させて導通させる必要がない。
【００２６】
【発明の効果】本発明によれば、ハンドピースの部分消
毒を可能にし、結果として、従来の器具を使った通常の
場合に比べてより多数回利用できるようになる。加え
て、本発明の電極アセンブリは、電極が完全に消毒さ
れ、多数回の利用が可能になる。したがって、電気外科
治療の経費が減免できるようになる。
【図面の簡単な説明】
【図１】 本発明による電極アセンブリを有する電気外
科用器具の部分断面側面図
【図２】 図１に示した器具におけるハンドピース及び
電極アセンブリ基端部の縦断面図
【図３】 図１中のIII−III線でハンドピースを切った
横断面図
【図４】 前記電極アセンブリの基端部の斜視図
【符号の説明】
１０ ハンドピース １２ 電極アセンブリ １２Ｅ 電極 １２Ｈ ハウジング １２Ｍ 装着部 １２Ｓ 管状シャフト １２ＳＬ スリーブ ２０ 電気伝導体 ２０Ｃ 接触部
───────────────────────────────────────────────────── フロントページの続き (72)発明者 コリン チャールズ オーウェン ゴーブ ル イギリス，ＣＦ64 １ＡＴ，サウス グラ モーガン，ペナース，オズボーン クライ ブ クレセント ５番地

Claims (14)

    【特許請求の範囲】
  1. 【請求項１】電気外科装置用の電極アセンブリにおい
    て、 その末端部に少なくとも１つ電極が設けられた管状シャ
    フトと、 前記シャフトを通って前記電極に接続され且つ前記シャ
    フトの基端部に装着された電気伝導体と、 前記電気外科装置のハンドピースに回転不能に取り付け
    られるように形成された第１部品と前記シャフトに固定
    され且つこのシャフトの軸を中心として前記第１部品に
    対して回転可能な第２部品とを有するとともに、前記伝
    導体が前記第１部品内に収容された接触部において終結
    し、前記電極と前記シャフトと前記電気伝導体の前記シ
    ャフトの末端部内に存する部分と前記第２部品とが前記
    軸を中心として前記第１部品及び前記接触部に対して回
    転可能になるように形成されている前記電極アセンブリ
    を前記電気外科装置に着脱可能に装着するための装着部
    とを備えたことを特徴とする電気外科装置用の電極アセ
    ンブリ。
  2. 【請求項２】２つの前記電極が前記シャフトの末端部に
    装着され、 互いに絶縁された前記２つの伝導体が前記シャフトの内
    側に設けられ、 ２つの前記接触部が前記装着部の前記第１部品内に収容
    されていることを特徴とする請求項１記載の電気外科装
    置用の電極アセンブリ。
  3. 【請求項３】前記伝導体は細長い金属片として形成され
    ていることを特徴とする請求項１または２記載の電気外
    科装置用の電極アセンブリ。
  4. 【請求項４】前記接触部は前記金属片と一体であること
    を特徴とする請求項３記載の電気外科装置用の電極アセ
    ンブリ
  5. 【請求項５】前記接触部は、前記伝導体の前記シャフト
    を通っている部分から前記シャフトの末端方向へ折り返
    されていることを特徴とする請求項３または４記載の電
    気外科装置用の電極アセンブリ。
  6. 【請求項６】前記第２部品は、前記シャフトの末端部に
    固定されたスリーブ部と、前記スリーブ部に設けられた
    回転制御手段とからなり、 前記第１部品は、前記スリーブを収容するための管状ハ
    ウジングからなることを特徴とする請求項１から５の何
    れかに記載の電気外科用の電極アセンブリ。
  7. 【請求項７】前記管状ハウジングは、各々の前記接触部
    を固定する手段を有していることを特徴とする請求項６
    記載の電気外科用の電極アセンブリ。
  8. 【請求項８】前記管状ハウジングは、この管状ハウジン
    グの前記ハンドピース内への摺動挿入を可能にするキー
    形状を有していることを特徴とする請求項６または７記
    載の電気外科用の電極アセンブリ。
  9. 【請求項９】前記管状ハウジングは、前記ハウジングを
    前記第２部品に対して縦方向に位置決めするための不連
    続部を有していることを特徴とする請求項６から８の何
    れかに記載の電気外科用の電極アセンブリ。
  10. 【請求項１０】前記ハウジングはカバーを有していると
    ともに、前記不連続部はこのカバー上にあることを特徴
    とする請求項９記載の電気外科用の電極アセンブリ。
  11. 【請求項１１】前記第２部品は、前記シャフトの内部に
    連通した洗浄液通路を有するとともに、 前記シャフト
    の末端部の内部を密封するために配置された柔軟なシー
    ル部材を更に備えたことを特徴とする請求項６から１０
    の何れかに記載の電気外科用の電極アセンブリ。
  12. 【請求項１２】ハンドピースと、前記ハンドピースに着
    脱可能に装着された請求項１記載の電極アセンブリとか
    らなり、 前記ハンドピースは、少なくとも１つが前記電極アセン
    ブリの前記接触面と摺動可能に接触する接触部を有する
    電源供給用の電気伝導体を備えていることを特徴とする
    電気外科装置。
  13. 【請求項１３】前記ハンドピースの電源供給用伝導体の
    接触部と前記電極アセンブリの接触部とは、軸方向に相
    互に摺動自在に接触するように配置され、この前記ハン
    ドピースの電源供給用伝導体の接触部又は前記電極アセ
    ンブリの接触部が弾性的に撓むことを特徴とする請求項
    １２記載の電気外科装置。
  14. 【請求項１４】前記電気外科装置は腹腔鏡を含むことを
    特徴とする請求項１２または１３記載の電気外科装置。
JP29392594A 1993-11-01 1994-11-01 電気外科装置用の電極アセンブリ、及びそれを用いた電気外科装置 Expired - Lifetime JP3638324B2 (ja)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9322464.0 1993-11-01
GB939322464A GB9322464D0 (en) 1993-11-01 1993-11-01 Electrosurgical apparatus

Publications (2)

Publication Number Publication Date
JPH07265328A true JPH07265328A (ja) 1995-10-17
JP3638324B2 JP3638324B2 (ja) 2005-04-13

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DE69417342D1 (de) 1999-04-29
JP3638324B2 (ja) 2005-04-13
EP0650701B1 (en) 1999-03-24
GB9322464D0 (en) 1993-12-22
DE69417342T2 (de) 1999-08-26
EP0650701A1 (en) 1995-05-03

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