JP2015044055A - 外科手術ステープリング器具 - Google Patents

外科手術ステープリング器具 Download PDF

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JP2015044055A
JP2015044055A JP2014237771A JP2014237771A JP2015044055A JP 2015044055 A JP2015044055 A JP 2015044055A JP 2014237771 A JP2014237771 A JP 2014237771A JP 2014237771 A JP2014237771 A JP 2014237771A JP 2015044055 A JP2015044055 A JP 2015044055A
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shell
shell assembly
engagement feature
staple guide
assembly
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パテル ニヒル
Nihir Patel
パテル ニヒル
ペドロス グイド
Guido Pedros
ペドロス グイド
アール. ポール スティーブン
Stephen R Paul
アール. ポール スティーブン
エル. ミリマン キース
Keith L Milliman
エル. ミリマン キース
ウィリアムズ ライアン
Ryan Williams
ウィリアムズ ライアン
ジェイ. ハブリルコ マイケル
Michael J Havrilko
ジェイ. ハブリルコ マイケル
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Covidien LP
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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
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/11Surgical instruments, devices or methods, e.g. tourniquets for performing anastomosis; Buttons for anastomosis
    • A61B17/115Staplers for performing anastomosis in a single operation
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/10Surgical instruments, devices or methods, e.g. tourniquets for applying or removing wound clamps, e.g. containing only one clamp or staple; Wound clamp magazines
    • A61B17/105Wound clamp magazines
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/11Surgical instruments, devices or methods, e.g. tourniquets for performing anastomosis; Buttons for anastomosis
    • A61B17/115Staplers for performing anastomosis in a single operation
    • A61B17/1155Circular staplers comprising a plurality of staples
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/11Surgical instruments, devices or methods, e.g. tourniquets for performing anastomosis; Buttons for anastomosis
    • A61B17/1114Surgical instruments, devices or methods, e.g. tourniquets for performing anastomosis; Buttons for anastomosis of the digestive tract, e.g. bowels or oesophagus
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B2017/00477Coupling
    • 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
    • A61B2017/07271Stapler heads characterised by its cartridge

Abstract

【課題】体組織に外科手術ステープルを適用する外科手術ステープリングデバイスを提供すること。【解決手段】ステープラを作動させる可動ハンドルを含むハンドルアセンブリと、ハンドルアセンブリから遠位に延びる細長い本体部分と、細長い本体部分の遠位部分に隣接して配置されかつアンビルアセンブリとシェルアセンブリとを含むヘッド部分であって、シェルアセンブリはシェルと複数のステープルを収納するステープルガイドとを含む、ヘッド部分と、ステープルガイドをシェルに取り付ける可撓性係合構造とを備えている、外科手術ステープリング器具。【選択図】図1

Description

(背景)
本出願は、2009年10月28日に出願された仮出願第61/255,544号からの優先権を主張し、該仮出願の内容全体が本明細書に参照によって援用される。
(技術分野)
本開示は、概して体組織に外科手術ステープルを適用する外科手術ステープリングデバイスに関する。より詳細には、本開示は、中空の組織器官の内壁に対する円形の吻合および/または治療を実行することに適した外科手術ステープリングデバイスに関する。
(関連技術の背景)
吻合は、別個の中空の器官の部分の外科手術接合である。典型的には、吻合処置は、中空の組織の罹患した部分または欠陥のある部分が除去され、残りの端部分が接合される外科手術の後に行われる。所望の吻合処置に従って、端部分は、円形、端部対端部または側部対側部のいずれかの器官再建方法によって接合され得る。
円形の吻合処置において、器官の切開部分の2つの端部はステープリング器具によって接合され、このステープリング器具は、各器官の切開部分の端部を通って円形のアレイのステープルを打ち込み、同時に、打ち込まれた円形のアレイのステープルの任意の組織内部の芯を抜き、管状の通路を開通させる。中空の器官の円形の吻合を実行する器具の例は、特許文献1、特許文献2、特許文献3、特許文献4、特許文献5、特許文献6、特許文献7、特許文献8、および特許文献9に説明される。典型的には、これらの器具は、近位端に器具を作動させるハンドル部分と、遠位端に配置されるステープル保持構成要素とを有する細長いシャフトを含む。アンビルヘッドが取り付けられたアンビルロッドを含むアンビルアセンブリは、ステープル保持構成要素に隣接して器具の遠位端に取り付けられる。ステープルで留められる、中空の器官の組織の向かい合う端部分は、アンビルヘッドとステープル保持構成要素との間でクランプされる。クランプされた組織は、ステープル保持構成要素から1つ以上のステープルを打ち込むことによってステープルで留められ、その結果、ステープルの端部は、組織を通過し、アンビルヘッドによって変形させられる。環状のナイフが同時に前進させられ、中空の器官内で組織の芯を抜き、器官内で管状の通路を開通させる。
中空の器官の吻合の他に、円形の吻合を実行する外科手術ステープリングデバイスは、直腸における内痔核を治療するために用いられてきた。典型的には、痔治療のために円形のステープリングデバイスを使用している間に、外科手術ステープリングデバイスのアンビルヘッドおよびステープル保持構成要素は、アンビルヘッドおよびステープル保持構成要素が開放位置または接近していない位置の状態で、肛門を通って直腸の中に挿入される。その後、巾着縫合糸が、内痔核組織をアンビルヘッドの方に引くために用いられる。次に、アンビルヘッドおよびステープル保持構成要素は、接近させられ、アンビルヘッドとステープル保持構成要素との間にある痔組織をクランプする。ステープリングデバイスは、発射され、痔組織を除去し、切断組織をステープルで留める。痔核切除術において、痔核が除去される。ステープルの痔核手術は、ステープリングデバイスが直腸内において痔を後退させるように引き、症状を軽減させるために、痔の真上の組織を除去するために用いられる外科手術処置である。ステープルは、上直腸動脈枝の血流を妨げ、組織への血液供給を遮断し、従って、痔を縮小させる。
いくつかの公知の円形ステープラは、シェルアセンブリを有し、シェルアセンブリは、ステープラプッシャと、複数の環状の列になった複数のステープラを収納するステープルガイドとを含む。これらの器具のいくつかにおけるステープルガイドは、超音波によってシェルアセンブリに溶接される。実際的であるが、全く別の取り付け方法が、安全上および製造上の観点から有利であり得る。
米国特許第7,303,106号明細書 米国特許第6,945,444号明細書 米国特許第6,053,390号明細書 米国特許第5,588,579号明細書 米国特許第5,119,983号明細書 米国特許第5,005,749号明細書 米国特許第4,646,745号明細書 米国特許第4,576,167号明細書 米国特許第4,473,077号明細書
(概要)
本開示は、一局面においてハンドルアセンブリと、細長い本体部分と、ヘッド部分とを含む外科手術ステープリング器具を提供する。ヘッド部分は、細長い本体部分の遠位部分に隣接して配置され、アンビルアセンブリとシェルアセンブリとを含む。シェルアセンブリは、シェルと複数のステープルを収納するステープルガイドとを含む。可撓性係合構造は、ステープルガイドをシェルに取り付ける。
一実施形態において、可撓性係合構造は、ステーブルガイドに少なくとも1つのフックを含む。シェルは、ステープルガイドのフックを受容するように構成され、寸法設定されるロッキング孔を含み得る。
別の実施形態において、可撓性係合構造は、シェルに可撓性タブを含む。可撓性タブは、ステーブルガイドに、フックを受容する孔を含み得る。フックは、実質的に剛性であり得る。
別の実施形態において、シェルアセンブリは、遠位に延び、遠位の力をステープルガイドに加える複数の突出部を含む。突出部は、ステープルガイドによって圧縮可能であり得る。
本開示は、別の局面において、ステープラを作動させる可動ハンドルを含むハンドルアセンブリと、ハンドルアセンブリから遠位に延びる細長い本体部分と、細長い本体部分の遠位部分に隣接して配置され、アンビルアセンブリとシェルアセンブリとを含むヘッド部分とを備えている外科手術ステープリング器具を提供する。シェルアセンブリは、シェルと、複数のステープルを収納するステープルガイドとを含む。ステープルガイドはタブを含み、シェルアセンブリは、第1のスロット部分と第1のスロット部分に対して斜めになった第2のスロット部分とを有するスロット領域を含む。タブは、ステープルガイドおよびシェルアセンブリを取り付けるために、スロット領域内において可動である。
一実施形態において、第1のスロット領域は実質的に軸方向に延び、第2のスロット領域は実質的に半径方向に延びる。一実施形態において、第2のスロット領域は、タブの外側寸法より小さい寸法を有する直径減少部を有する。
例えば、本発明は以下の項目を提供する。
(項目1)
ステープラを作動させる可動ハンドルを含むハンドルアセンブリと、
該ハンドルアセンブリから遠位に延びる細長い本体部分と、
該細長い本体部分の遠位部分に隣接して配置され、アンビルアセンブリとシェルアセンブリとを含むヘッド部分であって、該シェルアセンブリはシェルと複数のステープルを収納するステープルガイドとを含む、ヘッド部分と、
該ステープルガイドを該シェルに取り付ける可撓性係合構造と
を備えている、外科手術ステープリング器具。
(項目2)
上記可撓性係合構造は、上記ステーブルガイド上に少なくとも1つのフックを含む、上記項目に記載の器具。
(項目3)
上記シェルは、上記ステープルガイドの上記フックを受容するように構成され、寸法設定されたロッキング孔を含む、上記項目のいずれか1項に記載の器具。
(項目4)
上記可撓性係合構造は、上記シェル上に可撓性タブを含む、上記項目のいずれか1項に記載の器具。
(項目5)
上記可撓性タブは、上記ステーブルガイド上に、フックを受容する孔を含む、上記項目のいずれか1項に記載の器具。
(項目6)
上記フックは実質的に剛性である、上記項目のいずれか1項に記載の器具。
(項目7)
上記可撓性タブは、上記シェルの最遠位端に位置を決められる、上記項目のいずれか1項に記載の器具。
(項目8)
上記ステープルガイドによって圧縮可能な少なくとも1つの可撓性突出部材をさらに備えている、上記項目のいずれか1項に記載の器具。
(項目9)
上記フックは、斜めの表面を含み、該斜めの表面は、上記フックの屈曲を起こすように、組み立て中に上記ロッキング孔に隣接した壁と係合可能である、上記項目のいずれか1項に記載の器具。
(項目10)
上記シェルアセンブリは、遠位に延び、遠位の力を上記ステープルガイドに加える複数の突出部を含む、上記項目のいずれか1項に記載の器具。
(項目11)
上記突出部は、上記ステープルガイドによって圧縮可能である、上記項目のいずれか1項に記載の器具。
(項目12)
上記突出部は、上記シェルの最遠位端から延びる、上記項目のいずれか1項に記載の器具。
(項目13)
ステープラを作動させる可動ハンドルを含むハンドルアセンブリと、
該ハンドルアセンブリから遠位に延びる細長い本体部分と、
該細長い本体部分の遠位部分に隣接して配置され、アンビルアセンブリとシェルアセンブリとを含むヘッド部分であって、該シェルアセンブリはシェルと複数のステープルを収納するステープルガイドとを含み、該ステープルガイドは、タブと、第1のスロット部分および該第1のスロット部分に対して斜めになった第2のスロット部分を有するスロット領域を含むシェルアセンブリとを含み、該タブは、該ステープルガイドおよびシェルアセンブリを取り付けるために、該スロット領域内において可動である、ヘッド部分と
を備えている、外科手術ステープリング器具。
(項目14)
上記第1のスロット領域は実質的に軸方向に延び、上記第2のスロット領域は実質的に半径方向に延びる、上記項目のいずれか1項に記載の器具。
(項目15)
上記第2のスロット領域は、上記タブの外側寸法より小さい寸法を有する直径減少部を有する、上記項目のいずれか1項に記載の器具。
(摘要)
近位端を有するハンドルアセンブリと、ハンドルアセンブリから遠位に延びる細長い本体部分と、細長い本体部分の遠位部分に隣接して配置され、アンビルアセンブリおよびシェルアセンブリを含むヘッド部分とを備えている外科手術ステープリング器具。シェルアセンブリは、シェルと複数のステープルを収納するステープルガイドとを含む。可撓性係合構造は、ステープルガイドをシェルに取り付ける。
ここで開示される外科手術ステープリングデバイスの様々な実施形態は、図面を参照して本明細書において開示される。
図1は、接近した位置における本明細書で開示される外科手術ステープリング器具の実施形態の斜視図である。 図2は、図1のステープリング器具のシェルアセンブリの分解組立図である。 図3は、図2のステープルガイドの拡大図である。 図4は、図3に示される領域の詳細な拡大図であり、ステープルガイドの可撓性フックを例示する。 図5は、図1および図2のシェルの拡大図である。 図6は、図5に示される領域の詳細な拡大図であり、傾斜部およびロッキング開口部を示す。 図7は、図2のシェルアセンブリの側面斜視図である。 図8は、図7の線8−8に沿って取られた、図7のシェルアセンブリの断面図である。 図9は、図8に示される領域の詳細な断面のクローズアップ図であり、ステープルガイドの可撓性フックの、シェルのロッキング開口部との係合を示す。 図10は、ステープルガイドの取り付け前のシェルアセンブリの断面図であり、可撓性フックの屈曲を示す。 図11は、図10に示される領域の詳細な断面のクローズアップ図である。 図12は、図11に類似したクローズアップ図であり、最終アセンブリにおけるステープルガイドとシェルとの係合を示す。 図13は、本開示の代替の実施形態のシェルアセンブリおよびステープルガイドの断面図である。 図14は、図13に示される領域の詳細なクローズアップ図であり、ステープルガイドの剛性フックを示す。 図15は、図13に示される領域の詳細なクローズアップ図であり、シェルの係合タブを示す。 図16は、フックを屈曲させる、図13のステープルガイドとシェルとの最初の係合を示すクローズアップ断面図である。 図17は、図16に類似したクローズアップ断面図であり、最終アセンブリにおけるステープルガイドとシェルとの係合を示す。 図18は、本開示の別の代替の実施形態のシェルおよびステープルガイドの分解組立図である。 図19は、図18に示される領域の詳細なクローズアップ図であり、ステープルガイドのフックを示す。 図20は、図19の20−20に沿って取られたクローズアップ断面図であり、最終アセンブリにおけるステープルガイドとシェルとの係合を示す。 図21は、本開示の別の代替の実施形態のシェルおよびステープルガイドの分解組立図である。 図22は、図21に示される領域の詳細な断面のクローズアップ図である。 図23は、シェルのスロットにおける図21のステープルガイドのロッキングタブの最初の係合を示すクローズアップ図である。 図24は、シェルのスロットにおいて半径方向に動く、図23のロッキングタブのクローズアップ図である。 図25は、図24の線25−25に沿って取られた断面図である。 図26は、シェルのスロット内のロッキング位置における図23のロッキングタブのクローズアップ図である。 図27は、図26の線27−27に沿って取られた断面図である。
(詳細な説明)
ここで開示される外科手術ステープリング器具の実施形態は、ここで図面を参照して詳細に説明され、図面において同様の参照数字は、いくつかの図の各々において同一かまたは対応する要素を示す。
この説明を通して、用語「近位」は、オペレータにより近い、器具の一部分をいい、用語「遠位」は、オペレータからより遠くに離れている、器具の一部分をいう。
最初に図1を参照すると、ここで開示される外科手術ステープリングデバイスの実施形態が全体に参照番号10として示される。簡潔にいうと、外科手術ステープリングデバイス10は、ハンドルアセンブリ12と、ハンドルアセンブリ12から延びる湾曲した細長い外部管15を含む細長い本体部分14と、外部管15から延びるヘッド部分16とを含む。代わりに、例えば痔疾の治療などいくつかの処置において、本体部分は、実質的にまっすぐであり得る。本体部分14およびヘッド部分16の長さ、形状および/または直径はまた、特定の外科手術処置に適するように変更され得る。
例示の実施形態において、ハンドルアセンブリ12は、固定ハンドル18と、発射トリガ20と、回転可能接近ノブ22と、インジケータ24とを含む。ヘッド部分16は、アンビルアセンブリ30と、シェルアセンブリ31とを含む。アンビルアセンブリ30は、シェルアセンブリ31に対して間隔を空けた(接近していない)位置と接近した位置との間で可動である。アンビルアセンブリは、外科手術ステープリング器具10のアンビルリテイナに取り付けられた(好ましくは可動に取り付けられた)アンビルシャフトを含む。
動作時、接近ノブ22が、アンビルアセンブリ30に接続されているアンビルリテイナ38(図1)と帯を介して機械的に係合されているので、接近ノブ22の回転は、シェルアセンブリ31に対して、間隔を空けた位置と接近した位置との間でアンビルアセンブリ30を移動させる。第1の方向(例えば、時計回り)への接近ノブ22の回転がアンビルアセンブリ30を接近した位置に近位に動かし、アンビルとシェルアセンブリとの間の組織をクランプし、第2の反対方向(例えば、反時計回り)への接近ノブ22の回転がアンビルアセンブリ30を接近していない位置に遠位に動かすことが想定される。
発射トリガ20の作動(すなわち、固定ハンドル18の方向への旋回)は、シェルアセンブリ31からアンビルアセンブリ30の方にステープルを排出させる。すなわち、発射トリガ20は、ステープルプッシャまたはプッシャバック50(図2)と機械的に協働するように配置され、その結果、発射トリガ20の作動は、プッシャ50を前進させ、ステープルガイド60を通ってステープルガイド60に環状のアレイで収納されているステープル70と接触させられる。このことは、ステープル70をステープルポケットまたはスロット33から出し、アンビルアセンブリ30のステープル変形ポケットの中に押し込む。プッシャ50は複数の遠位に延びるプッシャフィンガ52を含み、プッシャフィンガ52はステープル70と接触し、それらをアンビルと接触するように前進させる。円形ナイフ74は、プッシャバック50に対してナイフ74をしっかりと固定するプッシャバック50の中央スルーボア51によって摩擦で保持される。ナイフ74は、プッシャバック50と共に前進可能であり、環状の列のステープル70の間の組織を切断する。スルーボア51は、シェル31の内側ガイド部分35の周りにスライド可能に位置を決められる。プッシャ50の遠位の円筒形部分53は、シェル31の遠位の円筒形部分34内にスライド可能に位置を決められる。プッシャバック50の近位端は、プッシャリンク(図示されていない)をロックして係合するように構成される部材55を含む。シェル31はまた、通気孔32を含み得る。
接近アセンブリおよび発射アセンブリなど、外科手術ステープリングデバイス10の特徴のさらなる詳細は、同一人所有の例えば米国特許第7,303,106号、第7,234,624号および第7,168,604号に開示され、該特許の内容全体は本明細書に参照によって援用される。
図2〜図12は、ステープルガイド60をシェルセンブリ31に取り付ける可撓性係合構造の第1の実施形態を例示する。最初に図3および図4を参照すると、ステープルガイド60の外側表面上の可撓性フック80は、近位方法に延び、好ましくはステープルガイド60の近位端において終結する。フック80は、ステープルガイド60のフランジ61の近位にある。フックは、ステープルガイド60の外側表面63と実質的に同一平面であり得る。フック80は、ステープルガイド60から延びる長手方向または軸方向の領域89に対して斜めである斜めの近位表面82を有する。フック80は、好ましくはステープルガイド60と一体的に形成される。しかしながら代わりに、フック80は、ステープルガイド60に取り付けられる別個の要素であり得る。好ましくは2つ以上のフックが、シェル31に沿って間隔を空けた領域で係合するように備え付けられる。例えば、2つのフックがおおよそ180度離れて配置され得、3つのフックがおおよそ120度離れて配置され得るなど。例示的実施形態は、おおよそ90度離れて間隔を空けて置かれる4つのフック80を示す。フックの非等距離間隔を含む他の間隔もまた意図される。
図5、図6および図9を参照すると、シェルセンブリ31は、好ましくは、シェル31の遠位縁31aからわずかに近位に間隔を空けて置かれるロッキング穴36を含み、各ロッキング穴36は、フック80を受容するように構成されかつそのように寸法設定される。シェル31の内側壁上の斜めの壁またはランプ37は、以下に説明されるように、フックの係合を容易にする。
図10〜図12を見ることによって理解され得るように、組み立て中ステープルガイド60が矢印Aの方向に配置することによってシェルアセンブリ31に取り付けられるとき、シェル31の斜めの壁31の表面がステープルガイド60のフック80の斜めの表面82によって係合されると、各フック80は、最初に矢印Bの方向に半径方向内側に(図10の配向において下方に)屈曲する。フック80の近位端が製造時に矢印Aの方向に十分に遠位に前進すると、フック80の近位端は、斜めの表面37を越え、壁38を越え、ついでもはや半径方向内側に(図11の図において下方に)付勢されないで、矢印Cの方向にフック80の正常の応力の掛からない状態に半径方向外側に(上方に)動き得、ロッキング孔36内に延び得る。示されるように、この位置において、フック80のショルダ84の壁表面37aとの係合は、ステープルガイド60の遠位の移動を妨げ、シェル31に固定された位置にステープルガイド60を保持する(図9も参照されたい)。使用中、器具の操作中またはステープルの発射中にステープルガイドに加えられる遠位の力は、遠位への移動が壁37aによって妨げられるので、シェルアセンブリ31からステープルガイド60を移動させない。フック80の各々は、上記の説明と同じ態様で、対応するロッキング孔36を係合する。好ましくはフック80がシェル31の外側表面39を通過して延びないように孔36の外側境界(外側直径)を越えて延びないことに注意されたい。
図13〜図17に例示される代替の実施形態において、剛性フックが利用される。シェル110は、ステープルガイドのフックと協働する構造以外、図2のシェル31と同一である。より具体的には、シェル110は、シェル110の遠位端112において切欠き122、124によって形成される可撓性タブ120を有する。可撓性タブ120は、そこに形成されるロッキング孔126を有する。ステープルガイド140は、フック構成以外、図2のステープルガイド140と同一である。より具体的には、ステープルガイド140は、そこに形成されるフック142を有し、フック142は、好ましくは実質的に剛性である。示されるように、フック142は、ステープガイド140から近位に延び、ステープルガイド140の遠位端において、斜めの近位表面144と、ステープルガイド140の長手方向軸に実質的に垂直である垂直表面147とを有する。長手方向または軸方向の領域145は遠位に延びる。複数のタブ120がシェル110に備え付けられ、各々のタブは、フック142を受容するように構成される。
図16〜図17を見ることによって理解され得るように、ステープルガイド140が組み立て中に矢印Dの方向に配置することによってシェルアセンブリ110に取り付けられるとき、フック142の斜めの表面144がタブ120の遠位タブ部分123の縁121を係合すると、シェル110のタブ120は、最初に、矢印Eの方向にシェル110から離れるように半径方向に離れて(図16の配向において上方に)屈曲する。縁121は、オプションで、フック140の斜めの表面142を係合するように斜めにされ得る。フック140の斜めの壁144が製造時に矢印Dの方向に十分に遠位に前進すると、フック140の斜めの壁144は、縁121を越え、遠位タブ部分123を越えて通過し、ついで遠位タブ部分123は、もはや上方に(半径方向に)付勢されないで、シェル110の方に矢印Gの方向に下方に(長手方向軸の方に内側に)動き得、それでフック142はロッキング孔126内に据え付けられる。示されるように、この位置において、フック142のショルダ145aの遠位タブ部分123の壁127との係合は、ステープルガイド140の遠位の移動を妨げ、適切な位置にステープルガイド140を保持する。使用中、器具の操作中またはステープルの発射中にステープルガイド140に加えられる遠位の力は、遠位の移動が壁127によって妨げられるので、シェルアセンブリ110からステープルガイド140を移動させない。
図18〜図20の代替の実施形態において、可撓性係合バンプが提供される。ステープルガイド170は、図2のステープルガイド60と同一であり、シェル180は、ステープルガイドのフックおよび可撓性バンプと協働する構造以外、図2のシェル31と同一である。より具体的には、ステープルガイド170は、近位に延びる可撓性フック172を有する。シェル180は、フック172を受容するように寸法設定され、構成されるロッキング孔182を有する。フック172は、ロッキング孔182の遠位に位置を決められる壁183を通過して挿入されると、屈曲する。壁183の遠位端は、好ましくは、フック172の斜めの表面174と協働する斜めの表面185を有し、挿入を容易にする。組み立て中、壁183は、図2のフック84に類似する態様で半径方向に内側にフック172を付勢し、フック172が壁183を越えて近位に通過することを可能にし、次いで
フック172は、図20に示されるようにロッキング孔182に受容されるフック172の正常位置に戻る。使用中、ステープルガイド170に加えられる遠位の力は、遠位の移動がショルダ175の壁189との係合によって妨げられるので、シェルダアセンブリ180からステープルガイド170を移動させない。
シェル180はまた、一連の可撓性のバンプまたは突出部186を有し得、ステープルガイド170の固定を強化する。バンプ186は、シェル180の遠位縁187から遠位に延びる。ステープルガイド170がシェル180に取り付けられたとき、可撓性のバンプまたは突出部186は内側に圧される。その結果、組み立て後、バンプ186は、ステープルガイド170に遠位の力を提供し、それによって、組み立てられたときフック172のショルダ175とロッキング孔182に隣接した壁189との間に緩みがある程度まで、壁183の表面189に対して遠位に(フック172ショルダ175)を押し付ける。その結果、バンプ/突出部186は、シェル180に組み立てられたときステープルガイド170を遠位方向に付勢するばねに似た機能を果たす。バンプまたは突出部が必要に応じ本明細書に開示される他の実施形態のシェルに備え付けられ得、遠位の付勢力を提供し得ることが理解されるべきである。
図21〜図27は、バヨネットマウントを利用してシェルアセンブリにステープルガイドを取り付ける別の代替の実施形態を例示する。シェル210は、ステープルガイドのタブと協働する構造以外、図2のシェル31と同一である。より具体的には、シェル210は、スロット領域212を有する。スロット領域212は、シェル210の遠位縁214から長手方向(軸方向)に近位に延び、スロット212の軸方向スロット領域212aを形成する。スロット212はまた、軸方向の領域212aを横切る半径方向に延びる領域212bを有し、それによって、実質的にL形のスロット構成を形成する。ロッキングくぼみ213は、半径方向領域212bの中に延びる。説明を容易にするため、ロッキング凹部または阻止くぼみ213は、半径方向領域212bを2つの区画に分割するものとして考えられ得る。
ステープルガイド230は、シェル210に取り付けるためのシェル210を係合する構造以外、図2のステープルガイド60と同一である。より具体的には、ステープルガイド230は、近位縁234にロッキングタブ232を有する。図23〜図27を見ることによって理解されるように、ステープルガイド230が組み立て中に矢印Eの方向への配置によってシェルアセンブリ110に取り付けられたとき、ロッキングタブ232はスロット212の軸方向領域212aに入る。ロッキングタブ232が軸方向領域212aの縁212cに挿入された後(図23を参照されたい)、ステーブルガイド230は、次いで回転させられ、図24の矢印Fの方向にスロット212の半径方向領域212bに動かされる。回転は、タブ232が図26に示されるようにブロッキング凹部213を通過して押し込まれるまで継続する。すなわち、タブ232がスロット212の半径方向領域212bに沿って動くと、タブ232はブロッキング凹部213を通過して押し込まれ、ブロッキング凹部213はスロット212の領域212bの直径減少領域212fを形成する(領域212fは、ロッキングタブ232の横寸法より小さい寸法を有する)。この直径減少領域212fを通過して動かされると、ブロッキング凹部(くぼみ)213に打ち勝ち、直径減少領域を通過するのに十分な力がシェルガイド230の回転によって加えられない限り、領域は、ロッキングタブ232の引っ込み、すなわち矢印Fの方向の反対方向の動きを妨げる。タブ232が屈曲するかまたはブロッキング凹部213を形成する引っ込んだ壁が屈曲するかのいずれかになり、それでタブがくぼみを通過するように動き得るように、構造が提供され得ることに注意されたい。使用中、器具の操作またはステープルの発射中にステープルガイド230に加えられる遠位の力は、遠位への移動が壁233によって妨げられ、切断がステープルガイド230をスロット212から取り外すためにステープルガイド230の逆方向の回転を必要とするので、シェルアセンブリ31からステープルガイド60を移動させない。
本明細書において開示される実施形態に対して様々な修正がなされ得ることは理解される。従って、上記の説明は、限定することとして解釈されるべきではなく、単に、開示される実施形態の実例として解釈されるべきである。当業者は、本明細書に添付される特許請求の範囲の範囲および精神内における他の修正を想定する。
10 外科手術ステープリングデバイス
12 ハンドルアセンブリ
14 本体部分
15 外側管
16 ヘッド部分
18 固定ハンドル
20 発射トリガ
22 接近ノブ
24 インジケータ
30 アンビルアセンブリ
31 シェルアセンブリ
50 プッシャバック
60 ステープルガイド
70 ステープル

Claims (16)

  1. 外科手術器具と共に用いられるシェルアセンブリであって、前記シェルアセンブリは、
    傾斜部とロッキング孔とを含むシェルと、
    複数のステープルを収納するように構成されたステーブルガイドと、
    前記ステーブルガイド上に配置された少なくとも1つの係合特徴であって、前記少なくとも1つの係合特徴は、前記少なくとも1つの係合特徴が前記ロッキング孔と係合する前に前記シェルの傾斜部にスライド可能に接触するように構成された表面を含む、少なくとも1つの係合特徴と
    を含む、シェルアセンブリ。
  2. 前記少なくとも1つの係合特徴の前記表面は、前記シェルの外側壁に対して非平行の角度で配置されている、請求項1に記載のシェルアセンブリ。
  3. 前記シェルの前記ロッキング孔は、可撓性タブ上に形成されている、請求項1に記載のシェルアセンブリ。
  4. 前記可撓性タブは、前記シェルの遠位端に隣接して配置されている、請求項3に記載のシェルアセンブリ。
  5. 前記少なくとも1つの係合特徴は、剛性である、請求項1に記載のシェルアセンブリ。
  6. 前記ステープルガイドによって圧縮可能な少なくとも1つの可撓性突出部をさらに含む、請求項1に記載のシェルアセンブリ。
  7. 前記ステープルガイドに遠位の力を加えるように構成された複数の遠位に延びる突出部をさらに含む、請求項1に記載のシェルアセンブリ。
  8. 前記複数の遠位に延びる突出部は、前記ステープルガイドによって圧縮可能である、請求項7に記載のシェルアセンブリ。
  9. 前記複数の遠位に延びる突出部は、前記シェルの遠位端から延びる、請求項7に記載のシェルアセンブリ。
  10. 前記ステープルガイドは、前記ステープルガイド上に環状に配置されたフランジを含み、前記少なくとも1つの係合特徴は、前記フランジの近位に配置されている、請求項1に記載のシェルアセンブリ。
  11. 前記少なくとも1つの係合特徴は、前記ステープルガイドの外側表面と実質的に同一平面である、請求項1に記載のシェルアセンブリ。
  12. 前記少なくとも1つの係合特徴は、前記ステープルガイド上に半径方向に配置された第1の係合特徴および第2の係合特徴を含み、前記ロッキング孔は、第1のロッキング孔および第2のロッキング孔を含み、前記第1の係合特徴および前記第2の係合特徴の各々は、前記第1のロッキング孔および前記第2のロッキング孔のうちの1つと係合するように構成されている、請求項1に記載のシェルアセンブリ。
  13. 前記第1の係合特徴および前記第2の係合特徴は、約180度離れて配置されている、請求項12に記載のシェルアセンブリ。
  14. 前記少なくとも1つの係合特徴と前記ロッキング孔との間で係合が起こると、前記少なくとも1つの係合特徴の遠位のショルダが、前記ロッキング孔によって画定された遠位の壁と係合する、請求項1に記載のシェルアセンブリ。
  15. 前記ロッキング孔は、前記シェルの最遠位端から近位方向に間隔を空けて配置されている、請求項1に記載のシェルアセンブリ。
  16. 前記シェル内に少なくとも部分的に配置されたプッシャであって、前記ステープルガイドに対して前進可能であるプッシャをさらに含む、請求項1に記載のシェルアセンブリ。
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