JP3955611B2 - 複数の外科用ファスナを身体組織につけるための外科装置 - Google Patents

複数の外科用ファスナを身体組織につけるための外科装置 Download PDF

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JP3955611B2
JP3955611B2 JP2005337566A JP2005337566A JP3955611B2 JP 3955611 B2 JP3955611 B2 JP 3955611B2 JP 2005337566 A JP2005337566 A JP 2005337566A JP 2005337566 A JP2005337566 A JP 2005337566A JP 3955611 B2 JP3955611 B2 JP 3955611B2
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ジェイ ヴィオラ フランク
ピー ヤング ウェイン
イー アレッシー ダニエル
エヌ グレンジャー リチャード
エル マーストリ ドミニク
イー トーソ ケニス
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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/068Surgical staplers, e.g. containing multiple staples or clamps
    • A61B17/072Surgical staplers, e.g. containing multiple staples or clamps for applying a row of staples in a single action, e.g. the staples being applied simultaneously
    • A61B17/07207Surgical staplers, e.g. containing multiple staples or clamps for applying a row of staples in a single action, e.g. the staples being applied simultaneously the staples being applied sequentially
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B2017/0046Surgical instruments, devices or methods, e.g. tourniquets with a releasable handle; with handle and operating part separable
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/068Surgical staplers, e.g. containing multiple staples or clamps
    • A61B17/072Surgical staplers, e.g. containing multiple staples or clamps for applying a row of staples in a single action, e.g. the staples being applied simultaneously
    • A61B2017/07214Stapler heads
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/28Surgical forceps
    • A61B17/29Forceps for use in minimally invasive surgery
    • A61B2017/2926Details of heads or jaws
    • A61B2017/2927Details of heads or jaws the angular position of the head being adjustable with respect to the shaft
    • A61B2017/2929Details of heads or jaws the angular position of the head being adjustable with respect to the shaft with a head rotatable about the longitudinal axis of the shaft
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/28Surgical forceps
    • A61B17/29Forceps for use in minimally invasive surgery
    • A61B2017/2926Details of heads or jaws
    • A61B2017/2932Transmission of forces to jaw members
    • A61B2017/2933Transmission of forces to jaw members camming or guiding means

Description

本発明は、外科装置に関する。より詳細には、本発明は、複数の外科用ファスナを身体組織につけるための外科装置に関する。
先ず、組織を対向するジョー構造体の間で掴み或いはクランプし、次いで、外科用ファスナによって接合する外科具は、この分野で良く知られている。幾つかの器具では、ファスナによって接合された組織を切るためのナイフが設けられている。このファスナは、典型的には、外科用ステープルの形態であるが、2部ポリマ(two part polymeric)のファスナも利用される。この目的の器具は、組織を捕らえ或いはクランプするためにそれぞれ使用される2つの細長い部材を備える。典型的には、一方の部材が、少なくとも2つの横列に配置された複数のステープルを収容する使捨てカートリッジを支持し、他方の部材が、カートリッジから出されたときにステープルの脚を成形する表面を形成するアンビルを備える。一般に、ステープル留め作業は、カートリッジ支持部材の中を長手方向に進むプッシャによって行われ、該プッシャはステープルに作用し、次いで、ステープルを次々にカートリッジから押出す。ナイフが、ステープル列の間をプシャと共に進み、ステープルの間でステープル留めされた組織を長手方向に切り、そして/又は、開いてもよい。そのような器具が、ボブロブ等(Bovrov et al)の米国特許第3,079,606 号明細書(特許文献1)、グリーン(Green) の米国特許第3,490,675 号明細書(特許文献2)に開示されている。
米国特許第3,499,591 号明細書(特許文献3)で開示されているその後のステープラは、2列のステープルを切開の各側につける。このことは、カム部材が2組の互い違いにされたステープル支持溝の間の細長い案内通路の中を動くカートリッジ組立体を設けることによって、成し遂げられる。ステープル押出し部材は溝内に配置され、そして、長手方向に動くカムに接触されステープルを押出すように位置決めされる。このようなステープラの他の例が、米国特許第4,429,695 号明細書(特許文献4)、及び、米国特許第5,065,929 号明細書(特許文献5)に開示されている。上述の器具の各々は、外科医が手術部位に手で直接アクセスする従来の手術のために設計されたものである。しかしながら、内視鏡又は腹腔鏡を用いた手術では、手術は、小さな切開部を通して又は皮膚にあけられた小さな入口を通して投入された狭いカニューレを通して行われる。内視鏡手術及び/又は腹腔鏡手術における特有な要求に応えるために、内視鏡手術用ステープル留め用装置が開発されており、米国特許第5,040,715 号明細書(特許文献6)、及び、米国特許第5,318,221 号明細書(特許文献7)に開示されている。一般に、これらの器具は、アンビルの接近を行うためのクランプ用構造部材と、その間に組織を固定するカートリッジと、組織を固定した後にカートリッジから複数のファスナを次々に排出するステープル押出構造部材とを備える。
上述した器具は、組織をクランプし、固定し、そして/又は切るために、手で所定の力を加える必要がある。このため、外科医は、限られた大きさの物理的な力だけで作動可能な自家動力付き器具を使用する利点に気付いた。自家動力付き外科器具はこれらのニーズに応じて提供されてきており、このような器具には、例えば米国特許第5,312,023 号明細書(特許文献8)に記載された、気体作動外科用ステープラや、例えば米国特許第4,365,638 号明細書(特許文献9)、米国特許第5,258,007 号明細書(特許文献10)、及び、欧州特許出願第0552050 号明細書(特許文献11)に記載された、電動外科用ステープラがある。一般的に、従来の電動外科器具は、外部電源によって駆動されている。
米国特許第3,079,606 号明細書 米国特許第3,490,675 号明細書 米国特許第3,499,591 号明細書 米国特許第4,429,695 号明細書 米国特許第5,065,929 号明細書 米国特許第5,040,715 号明細書 米国特許第5,318,221 号明細書 米国特許第5,312,023 号明細書 米国特許第4,365,638 号明細書 米国特許第5,258,007 号明細書 欧州特許出願第0552050 号明細書
これらの器具は、導線ケーブルによって電源に接続されている。しかしながら、このようなケーブルは、手術中に、からまり、これによって、操作を複雑にする。従って、外科用ファスナを身体組織につけるための自家動力付き外科装置を提供することが有益である。又、そのような自家動力付き装置が再装填可能であるならば、有益である。したがって、本発明は、複数の外科用ファスナを身体組織につけるための外科装置を提供することを目的とする。
本発明は、複数の外科用ファスナを身体組織につけるように構成された外科装置であって、
a)細長いボディ部分を備え、該細長いボディ部分の中に駆動シャフトが配置されており、
b)複数の外科用ファスナを支持するハウジングを備え、該ハウジングは、外科装置の前記細長いボディ部分の遠位端部分に配置されており、
c)前記細長いボディ部分の遠位端部分に配置され、かつ、前記ハウジングに対して開位置と閉位置との間で移動可能なように取付けられたアンビルと、
d)前記ハウジングおよび前記アンビルに対して並進運動して、前記アンビルを開位置から閉位置に移動させ、外科用ファスナを前記ハウジングから排出して、前記アンビルに対して形成するように構成された作動機構と、
e)前記作動機構の並進運動を行うために、前記作動機構にねじ結合した軸線方向駆動ネジとを備え、前記軸線方向駆動ネジの近位端は、前記駆動シャフトの遠位端に着脱自在に連結されるように構成され、それによって、前記軸線方向駆動ネジが軸線のまわりに回転することにより、前記作動機構を長手方向に並進運動させるようにした、ことを特徴としている
本発明に関連した技術においては、ハンドル組立体と、該ハンドル組立体内に配置されたモータ組立体と、前記ハンドル組立体内に配置されたモータ組立体に動力を供給する動力源と、前記ハンドル組立体から遠位端方向に延びる細長いボディと、該細長いボディの遠位端部材に着脱自在に連結されたカートリッジ組立体とを有する。カートリッジ組立体は、複数の外科用ファスナを支持するハウジングと、該ハウジングと関連し且つ開位置と閉位置との間を動けるように取付けられたアンビルと、ハウジング及びアンビルに対して並進移動してアンビルを開位置から閉位置に徐々に動かし且つアンビルに対して形成されるハウジングから外科用ファスナを次々に排出するように構成された作動機構と、アクチュエータと螺合してこれを長手方向に並進運動させる軸線方向駆動ネジとを有する。この自家動力付き外科装置は、更に、細長いボディの中を通り且つモータ組立体をカートリッジ組立体の軸線方向駆動ネジに連結する細長い駆動シャフトを有する。
ハンドル組立体は、内部にモータ組立体が配置される細長いバレル部分と、内部に動力源が配置される付随的なハンドルグリップ部分とを有するのが好ましい。モータ組立体を選択的に作動させるために引き金機構がハンドル組立体と関連し、そして、モータ組立体の極性を選択的に逆転させるためにスイッチ機構が引き金機構と関連する。細長いボディとカートリッジ組立体とは、細長いボディの長手方向軸線に対して軸回転できるのが好ましい。このような回転を防止するために設けられた手段は、ハンドル組立体の遠位端に形成され且つ該遠位端の回りに円周方向に配置された複数の窪みと、弾性材料で形成され且つ細長いボディの近位端部分の回りに取付けられた環状カラーとを備えるのが好ましい。環状カラーは、直径方向に対向し且つ半径方向内方に延びる一対の突起を有し、該突起は円周方向に配置された窪みに係合するように寸法決めされ且つ構成されている。この突起がそれぞれの窪みと係合したとき、細長い部分のハンドル組立体に対する回転は防止される。半径方向内方に向けられた力を加えると、突起は窪みから係合解除され、回転が可能になる。
図面と関連した外科装置の詳細な説明によって、本発明の外科装置の他の特徴は、当業者にとってより明らかになるであろう。
以下、図面を参照して本発明の外科装置の実施例を説明する。本明細書において「近位側」とは、装置の操作者に最も近い側を指し、「遠位側」とは装置の操作者から最も遠い側を指す。本発明の装置を、内視鏡手術及び装置の両方と関連して説明する。しかしながら、「内視鏡による」、「内視鏡により」及び「内視鏡部分」というような用語の本明細書における使用は、本発明を内視鏡管と関連してのみ使用される装置に限定するために解釈されるべきでない。むしろ、関節鏡手術及び/或いは腹腔鏡手術を含むがこれに限定されないアクセスが小さな切開に制限される処置での、本発明の用途が見つかるであろうと考えられる。
同じ参照番号が本発明の同様の構造部分を示す図面を参照すると、図1には、本発明の好ましい実施形態に従って構成された自家動力付きの外科装置すなわち外科用装置が図示され、その外科用装置の全体が参照番号10で示されている。外科用装置10は、腹腔鏡による手術中に、身体組織をクランプし、複数の外科用ステープルを身体組織につけ、留められた身体組織に切開部を形成するように構成されている。概説すれば、外科用装置10は、ハンドル部分12と、ハンドル部分12から遠位端方向に延びる細長いボディ部分14と、ボディ部分14の遠位端に連結されたカートリッジ組立体16とを有する。
図2及び図3を参照すると、外科用装置10のハンドル部分12は、2つのハウジング半部からなり、細長いバレル部分18とハンドルグリップ部分20とを有する。出力シャフト(図示せず)を有するモータ組立体22がバレル部分18内に配置され、該モータ組立体22は、出力シャフトの回転速度を落とし且つモータ組立体によって送られるトルクを増大させるためのギアセット24を有する。ギアセット24は、モータ組立体22の出力シャフトによって直接駆動されるピニオンギア26を有する。ピニオンギア26は、キャリア30に支持される第1の遊星歯車セット28を駆動する。次いで、キャリア30のピニオン部分が、第2の遊星歯車セット34を駆動し、次いで、第2の遊星歯車セット34がハブ部材36を駆動する。リングギア32は静止したままであり、遊星歯車セット28、34の作用点として機能する。受入れポート38が、細長い駆動シャフト42の近位端を受けれるためにハブ部材36に形成されている。駆動シャフト42は、ハブ36から、外科装置10の細長いボディ部分14を通って、カートリッジ組立体16まで延びている。シャフトカップリングが、駆動シャフト42の遠位端に設けられ、カートリッジ組立体16を駆動シャフト42に着脱自在に連結している。この構成は、図8に関連して後に詳述する。
引き続き図2及び図3を参照すると、モータ組立体22は、ハンドル部分12のハンドルグリップ部分20に内蔵された一対の電池45a、45bから動力を供給される。図示するように、ハンドル部分12は、バレル部分18に略垂直に延びている。電池45a、45bは、リチウム、アルカリ、或いは、ニッケルカドミウム型電池であるのがよい。トリガ即ち引き金44は、グリップ部分20から突出し、モータ組立体22の作動を制御している。引き金44は、リンクバー48によって、スイッチ組立体46に連結されているのが好ましい。スイッチ組立体は、二極双投(double-pole-double-throw:DPDT) スイッチであるのが好ましく、選択的にモータ組立体に電気接続される。スイッチは、モータ組立体の出力シャフトが第1の方向に回転するのに対応する第1位置と、出力シャフトが第2の方向に回転するのに対応する第2位置と、モータ組立体が作動しない第3位置とを有するのが好ましい。このタイプのDPDTスイッチ組立体は、当業者に良く知られている。
図4は、スイッチ機構の略図である。図示するように、端子T3はモータの端子Aに結線され、端子T4はモータの端子Bに結線されている。電池45aの正極が、正極端子T5に結線され、電池45bの負極が負極端子T6に結線されている。引き金44が引かれてリンクバー48が近位端方向に動かされると、2つの中間端子T3、T4が、それぞれの後方端子T5、T6に接続される。従って、モータの端子Aがスイッチの正極側端子に接続されることになり、モータの端子Bがスイッチの負極側端子に接続されることになり、これによって、モータシャフトを第1方向に回転させ、シャフト42を第1方向に回転させ、ファスナを押出す。押出しを止めたいときには、引き金44を放して端子T3、T4のT5、T6との接続を断つ。押し出し行程が始まった後に、組織のクランプを緩めたいなら、引き金44を遠位端方向に引き、中間端子T3、T4を前側端子T1、T2に接続する。従って、モータの端子Aがスイッチの負極側端子に接続されることになり、端子Bがスイッチの正極側端子に接続されることになり、これによって、モータ及び駆動シャフトの回転方向が逆転する。
図2及び図3と共に図5及び図6を参照すると、動力付き外科用装置10は、ボディ部分14がハンドル部分12に対して軸線方向に回転できるようにし、装置の作動範囲を大きくするために、回転体機構50を備える。回転体機構50は、弾性材料ででき且つネジ山付き留め具51によってボディ部分14の近位端に連結された環状カラー52を有する。直径方向に対向した一対の突起56a、56bが、カラー52の内面52aから半径方向内方に延び、該突起がバレル部分18の遠位端部分の周囲に形成された対応した形状の窪みと選択的に係合するようになっている。突起56a、56bがバレルの窪み58に係合したとき、カラー52は、その位置にロックされ、ボディ部分14は回転できなくなる。このようにして、ファスナ付け作業中、その中を延びる駆動シャフト42が回転しているとき、ボディ部分14は固定状態に維持される。
直径方向に対向した一対の係合解除パッド60a、60bが、突起を解放し、カラー52が回転できるようにするために、突起から90°ずれて、カラー52の外周面52bに設けられている。従って、ボディ部分14をハンドル部分12に対して軸回転させるためには、図6に示すように、半径方向に内方に向ってパッド60a、60bに力を加え、弾性カラー52の部分53a、53bを半径方向外方に撓ませる。この撓みが、突起56a、56bを対応する窪み58a、58bから係合解除する。これにより、カラー52が解放され回転でき、これによって、ボディ部分14をハンドル部分12に対して回転させ、カートリッジ組立体16を所望位置に配向できる。図7を参照してカートリッジ組立体16を見ると、カートリッジ組立体16は、細長いボディ部分14の遠位端に着脱自在に連結される別体のユニットとして構成されている。このことにより、この装置は、追加のファスナ列を付けるために、新しいカートリッジを再装填できる。着脱自在であるという特徴は、所望なら、この器具を、使用後、ハンドル部分12と細長いボディ部分14を再消毒し、カートリッジ組立体を廃棄する半再使用可能器具として製造することを可能にする。器具全体を使い捨てにすることも考えられる。
カートリッジ組立体16は、2つの主構成部分、即ち、カートリッジアダプタ70と、細長いハウジングすなわちハウジングチャネル80とを有する。これらは、ネジ山付き留め具75によって互いに取付けられている。カートリッジアダプタ70は、近位端に細長いボディ部分14の遠位端内に収容されるように寸法決めされた取付け部分72を有する。軸線方向のボア74が、円筒状カートリッジカップリング76を回転可能に支持できるように、取付け部分72の中を延びている。カートリッジカップリング76は、その遠位端が軸線方向駆動ネジ78の近位端に連結するように構成されている。カートリッジカップリング76は、その近位端が、駆動シャフト42の遠位端に連結されたシャフトカップリング140に着脱自在に連結される。回転運動を駆動シャフト42から駆動ネジ78まで伝えるこのカップリングについては、後に詳細に説明する。
ハウジングチャネル80は、対向する側壁80a、80bと、床80cとを有する。開口82が、ハウジングチャネル80の近位端に隣接した床80cに形成され、留め具75を受入れるようになっている。対向する開口83a、83bが、ハウジングチャネル80の側壁80a、80bに形成され、アンビル部材すなわちアンビル86の近位端に隣接して形成された一対の外方に延びるフランジ84a、84bを受け入れるようになっており、該フランジを中心として、アンビル86は開位置と閉位置の間を枢動し、組織を掴んだり離したりする。一対のバネ部材58a、85bが、アンビル86を開位置に付勢するように、開口83a、83b内に配置されている。対向する係合ノッチ88a、88bが、一方が図示され参照番号89で示される保持カートリッジ90の一対の戻り止めを受け入れるように、ハウジングチャネル80の遠位端に隣接して側壁80a、80bに設けられている。戻り止めは、ファスナ保持カートリッジ90と一体的に形成され、ハウジングチャネル80の遠位側部分内にカートリッジを固定する。
引き続き図7を参照すると、カートリッジ組立体16は、保持カートリッジ90に対してアンビル86を開位置から閉位置まで徐々に動かし、付随して、保持カートリッジ90から複数のカートリッジを次々に排出させるための細長い作動ビーム100を備える。作動ビーム100は、上述のように駆動シャフト42によって駆動される軸線方向駆動ネジ78によって駆動される。作動スレッド即ち作動そり120が、保持カートリッジ90の中を並進移動し、そこから外科用ファスナを排出するように構成されている。作動そり120は、基部122と、間隔をおいた複数の直立カムプレート124と、中央駆動板すなわち駆動プレート125とを有する。各カムプレート124は、外科用ファスナを保持カートリッジ90から身体組織の中に押出してアンビル86に形成されたアンビル窪みと係合させる複数のステープルドライバ(図示せず)に、順次、係合する角度付きカム面を有する。作動ビーム100の前縁100aは駆動プレート125と係合し、作動そり120を保持カートリッジ90の中で駆動する。切断ブレード130が、前縁100aに隣接して作動ビーム100に取付けられ、切断ブレード130は、スレッド120の後についてカートリッジ組立体16の中を並進するように構成され、ステープル留めした組織に切開部を形成する。
静止支持体取付け部材92が、カートリッジ組立体16の中に配置され、作動ビーム100の長手方向の並進運動を案内し、且つ、軸線方向駆動ネジ78の遠位端78を支持している。駆動ネジ78の近位端78bは、上述したように、シャフトカップリング140を介して駆動シャフト42に連結されているカートリッジカップリング76に係合している。フォロワナット94が、駆動ネジ78と螺合的に関連し、且つ、フォロワハウジング95内に取付けられている。フォロワハウジング95は、駆動ネジ78の軸線方向の回転に応答して長手方向に並進運動するように取付けられている。作動ビーム100の近位側の細長いビーム延長部96、98は、作動ビーム100がフォロワハウジング95と一緒に遠位方向に並進運動するように、作動ビーム100をフォロワハウジング95に作動的に連結させる。
作動ビーム100の遠位端は、略円筒状のカムローラ104を支持する保持フランジ102と、略平らなカムビーム108を保持する係合スロット106とを有する。カムローラ104は、フォロワハウジング95及び作動ビーム100がハウジングチャネル80の中を並進運動しファスナを押し出すとき、アンビル86の上側カム面110と係合し、且つ、これに対して並進運動してアンビル86を徐々に閉じる。カムビーム108は、ハウジングチャネル80の床80cの外側面と係合しこれ対して並進運動し、アンビル86を閉じている間、カムローラ104によってアンビル86に加えられる力を調整する。作動ビーム100の長手方向の並進運動に適合するように、長手方向スロット112がハウジングチャネル80の床89cに形成され、そして、アンビル86に対応する長手方向スロット114が形成されている。横方向のスロット114aが、カムローラ104をその並進運動の終わりで受け入れるように、アンビル86のスロット114の遠位端に形成されており、これによって、留め作業の後、アンビル86が、バネ部材85a、85bの付勢力によって開位置に戻る。
図8から図11を参照すると、上述したように、外科用装置10のカートリッジ組立体16が、バヨネットカップリング即ち差込みカップリングによって、ボディ部分14の遠位端に着脱自在に取付けられた別のユニットとして構成されている。加えて、上述したように、軸線方向の駆動ネジ78は、カートリッジカップリング76及びシャフトカップリング140を介して駆動シャフト42に着脱自在に連結されている。図8に示すように、シャフトカップリング140は、駆動シャフト42の遠位端に形成されたキャビティ142内に摺動自在に支持されている。カップリング140の遠位端に、カートリッジカップリング76から延びる対応する歯145に係合するように横方向のスロット144が形成されている(図7も参照のこと)。対向するシャフトスロット148a、148bに支持され且つシャフトカップリング140の開口141の中を通るピン146が、シャフトカップリング140をキャビティ142に支持し、カップリングバネ150の付勢力に抗してシャフトカップリング140が長手方向に並進運動できるようにする。カップリングバネ150は2つの機能を有する。第1には、カートリッジ組立体16をボディ部分14の遠位端に挿入したとき、もし、シャフトカップリング140のスロット144とカートリッジカップリング76の歯145とが合わなかったら、カップリングバネ150は、この不整合を補償し、駆動シャフト42が初期回転したときに、カップリングの係合を容易にする。これは、歯145がシャフトカップリング140の面143に当接したときに、カップリングバネ150の初期圧縮によって起こる。
駆動シャフト42が、最初に回転し、スロット144が歯145と整合したとき、カップリングバネ150が、シャフトカップリング140を遠位端方向に押しやり、スロット144が歯145に係合する。カップリングバネ150の第2の機能は、図9及び図10に最も良く示すように、カートリッジ組立体16をボディ部分14に維持している差込みカップリングを係合したときに、カートリッジアダプタ70を遠位端方向に付勢することである。差込むカップリングは、ボディ部分14に形成され、カートリッジアダプタ70(図7参照)から半径方向外方に延びる係合ピン158a、158bに対応する略J字形状の係合スロット156を有する。カートリッジ組立体16を取付中、カートリッジアダプタ70の近位端を、ボディ部分14の遠位端内に軸線方向に挿入して、そして、約20°回転させてピン158a、158bを対応するスロット156a、156bに係合させる(図1)。そのとき、カップリングバネ150が、シャフトカップリング140とカートリッジアダプタ70を遠位端方向に付勢し、ピン158a、158bをスロット156a、156b内の係合位置に維持する。
図11から図13を参照すると、手術中、手術部位にアクセスするために、本発明に係る装置がトロカールカニューレ200の中に挿入されている。身体組織をアンビル86と保持カートリッジ90の間で捕らえたとき、引き金44を引いてモータ組立体22を作動させ、ギアセット24が駆動シャフト42に回転運動を伝えるようにさせ、次いで、駆動シャフト42が回転運動を軸線方向駆動ネジ78に伝達する。そのとき、フォロワハウジング95が長手方向に並進運動し、作動ビーム100を遠位端方向に駆動する。作動ビーム100が、遠位端方向に並進運動したとき、カムローラ104が、アンビル86を、図11に示す通常の付勢された開位置から、図12に示す、閉じたクランプ位置まで、徐々に動かす。
これに付随して、作動そり120が、図11に示す近位端位置から保持カートリッジ90の中を図12に示す最も遠位側の位置まで動かされ、外科用ファスナを次々にボディ組織の中に押し出す。カムローラ104が細長いスロット114の遠位端に到達したとき、カムローラは横方向スロット114aの中に落ち、アンビル86が開位置に戻り、ステープル留めされた身体組織を解放するようにする。ファスナ付け作業が終了すると、ピン158a、158bをスロット156a、156bから係合解除して、カートリッジアダプタ70をボディ部分14から取り外すように、カートリッジ組立体16を操作する。その後、複数の外科用ファスナを収容した新しいカートリッジ組立体と、近位端側位置に配置されたステープル押出しそりとが、上述したのと同じ方法で、装置に取付けられ、もう一度ステープル留めができるようにする。
好ましい実施態様に関連して本発明の外科用ステープル留め装置(外科装置)について説明してきたが、特許請求の範囲の記載の思想及び範囲から逸脱することなく、この実施態様に変更し又は変形することは、本発明の属する技術分野における当業者にとって極めて明白なことであろう。
本発明の好ましい実施例によって構成された外科用装置の斜視図である。 図1に示す外科用装置のハンドル組立体の側断面図である。 モータ組立体を図示するためにハウジングの半部の一方を取外した状態での、細長いボディ及びハンドル組立体の斜視図である。 外科用装置の作動を選択的に制御するスイッチング機構を示す略図である。 回転カラーがハンドル組立体のバレル部分と係合した状態での、図2のA−A線に沿った断面図である。 回転カラーがハンドル組立体から係合解除されて細長いボディ部分の回転が可能となった状態での、図2のA−A線に沿った断面図である。 図1に示す外科用装置のカートリッジ組立体の分解斜視図である。 図7のカートリッジ組立体を駆動シャフトに着脱自在に連結する連結構成を示す、図1に示す外科用装置の駆動シャフトの遠位端の斜視図である。 図7のカートリッジ組立体の細長いボディ部分への連結を示す、装置ボディの遠位端を部分的に断面にした正面図である。 図7のカートリッジ組立体の細長いボディ部分への連結を示す、装置ボディの遠位端を部分的に断面にした正面図である。 ファスナを出す前の図1に示す外科用装置のカートリッジ組立体を示す断面図である。 ファスナを出した図1に示す外科用装置のカートリッジ組立体を示す断面図である。 トロカールカニューレの中に挿入された、図1に示す外科用装置の斜視図である。
符号の説明
10 外科用装置
12 ハンドル部分
14 ボディ部分
16 カートリッジ組立体
18 バレル部分
20 ハンドルグリップ部分
22 モータ組立体
24 ギアセット
26 ピニオンギア
28 第1の遊星歯車セット
30 キャリア
32 リングギア
34 第2の遊星歯車セット
36 ハブ部材
38 受入れポート
42 駆動シャフト
44 引き金
45a、45b 電池
46 スイッチ組立体
48 リンクバー
52 環状カラー
56a 突起
56b 突起
58a 窪み
58b 窪み
60a 係合解除パッド
60b 係合解除パッド
70 カートリッジアダプタ
76 カートリッジカップリング
78 軸線方向駆動ネジ
80 ハウジングチャネル
86 アンビル
90 ファスナ保持カートリッジ
92 静止支持体取付け部材
100 作動ビーム
104 カムローラ
108 カムビーム
120 作動そり
124 カムプレート
125 駆動プレート
130 切断ブレード
140 シャフトカップリング
144 スロット
145 歯
150 カップリングバネ

Claims (9)

  1. 複数の外科用ファスナを身体組織につけるように構成された外科装置であって、
    a)細長いボディ部分(14)を備え、該細長いボディ部分(14)の中に駆動シャフト(42)が配置されており、
    b)複数の外科用ファスナを支持するハウジング(80)を備え、該ハウジング(80)は、外科装置の前記細長いボディ部分(14)の遠位端部分に配置されており、
    c)前記細長いボディ部分(14)の遠位端部分に配置され、かつ、前記ハウジング(80)に対して開位置と閉位置との間で移動可能なように取付けられたアンビル(86)と、
    d)前記ハウジング(80)および前記アンビル(86)に対して並進運動して、前記アンビル(86)を開位置から閉位置に移動させ、外科用ファスナを前記ハウジング(80)から排出して、前記アンビル(86)に対して形成するように構成された作動機構(100)と
    e)前記作動機構(100)の並進運動を行うために、前記作動機構(100)にねじ結合した軸線方向駆動ネジ(78)とを備え、前記軸線方向駆動ネジ(78)の近位端は、前記駆動シャフト(42)の遠位端に着脱自在に連結されるように構成され、それによって、前記軸線方向駆動ネジ(78)が軸線のまわりに回転することにより、前記作動機構(100)を長手方向に並進運動させるようにした、
    ことを特徴とする外科装置。
  2. 前記駆動シャフト(42)の遠位端は、バネによって付勢されたカップリング機構によって、前記軸線方向駆動ネジ(78)の近位端に着脱自在に連結されることを特徴とする、請求項1に記載の外科装置。
  3. 前記カップリング機構は、圧縮バネを含んでおり、前記圧縮バネは、軸線方向駆動ネジ(78)と、前記駆動シャフト(42)の遠位端との係合を容易にするように構成されることを特徴とする、請求項2に記載の外科装置。
  4. さらに、前記駆動シャフト(42)と前記軸線方向駆動ネジ(78)を相互に連結するシャフトカップリング(140)を備え、該シャフトカップリング(140)は、前記駆動シャフト(42)に対して回転可能に固定され、かつ、前記細長いボディ部分(14)に対して長手方向に摺動可能であり、かつ、前記シャフトカップリング(140)は、長手方向に付勢されて、前記軸線方向駆動ネジ(78)と作動可能に係合するようになっており、さらに、前記軸線方向駆動ネジ(78)に作動可能に連結されたカートリッジカップリング(76)を備えており、該カートリッジカップリング(76)は、近位方向に延びる歯(145)を有しており、前記シャフトカップリング(140)は、遠位方向に延びるスロット(144)を有しており、前記シャフトカップリング(140)のスロット(144)は付勢されて、前記カートリッジカップリング(76)の歯(145)と係合するようになっていることを特徴とする、請求項2に記載の外科装置。
  5. さらに、ステープル留めされた身体組織に切開部を形成するために、前記作動機構(100)に関連して、前記ハウジング(80)および前記アンビル(86)に対して並進運動するように構成された切断ブレード(130)を備えることを特徴とする、請求項1に記載の外科装置。
  6. 前記アンビル(86)は、通常、開位置になるように付勢されることを特徴とする、請求項1に記載の外科装置。
  7. 前記アンビル(86)は、前記ハウジング(80)からファスナが排出されるときに、該ファスナを押しつけるファスナ成形面と、対向するカム面とを有することを特徴とする、請求項1に記載の外科装置。
  8. 前記作動機構は、円筒状のカムローラ(104)を支持するビーム(100)を含んでおり、前記作動機構が長手方向に並進運動する間に、前記アンビルの対向するカム面を移動させるために、前記円筒状のカムローラ(104)は、前記アンビル(86)の対向するカム面と係合するように寸法決めされ且つ形成されていることを特徴とする、請求項7に記載の外科装置。
  9. 前記カムローラ(104)を受け入れ、かつ、ファスナ付け作業の終了のときに、前記アンビル(86)を通常の付勢された開位置に戻すためのスロットが、前記アンビル(86)に形成されることを特徴とする、請求項8に記載の外科装置。
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