JP2010520009A - 粘膜切除術用ステイプラー - Google Patents

粘膜切除術用ステイプラー Download PDF

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JP2010520009A
JP2010520009A JP2009552331A JP2009552331A JP2010520009A JP 2010520009 A JP2010520009 A JP 2010520009A JP 2009552331 A JP2009552331 A JP 2009552331A JP 2009552331 A JP2009552331 A JP 2009552331A JP 2010520009 A JP2010520009 A JP 2010520009A
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レビュファ、カルロ
デーヴィッド、ダンテ
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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods
    • A61B17/11Surgical instruments, devices or methods for performing anastomosis; Buttons for anastomosis
    • A61B17/115Staplers for performing anastomosis, e.g. in a single operation
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods
    • A61B17/11Surgical instruments, devices or methods for performing anastomosis; Buttons for anastomosis
    • A61B17/115Staplers for performing anastomosis, e.g. 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
    • A61B17/34Trocars; Puncturing needles
    • A61B17/3417Details of tips or shafts, e.g. grooves, expandable, bendable; Multiple coaxial sliding cannulas, e.g. for dilating
    • A61B17/3421Cannulas
    • A61B17/3423Access ports, e.g. toroid shape introducers for instruments or hands
    • AHUMAN NECESSITIES
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    • A61B17/00Surgical instruments, devices or methods
    • A61B17/00234Surgical instruments, devices or methods for minimally invasive surgery
    • A61B2017/00238Type of minimally invasive operation
    • A61B2017/00269Type of minimally invasive operation endoscopic mucosal resection EMR
    • AHUMAN NECESSITIES
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    • A61B17/00Surgical instruments, devices or methods
    • A61B17/11Surgical instruments, devices or methods for performing anastomosis; Buttons for anastomosis
    • A61B2017/1142Purse-string sutures
    • AHUMAN NECESSITIES
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    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
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Abstract

端部に環状ブレード3を固定して取り付けたゴブレット状内挿体(2)と、同軸上で摺動可能なゴブレット状外殻体(1)とを備える粘膜切除術用ステイプラーのヘッド部分に関する。ゴブレット状内挿体(2)にはロッド(6)が摺動可能に挿入される中心軸穴(5)が備えられ、ロッド端部にはアンビル(8、8’)が固定して取り付けられる。1以上のリング状溝(11)は、ロッド(6)の外周面に軸と直交方向に相互に適切な間隔を置いて平行に形成される。この溝(11)は粘膜をロッドに巾着縫合した時に巾着部分の粘膜(9a)を収納するために設けたものである。ゴブレット状内挿体(2)の管軸部(2a)の中心軸穴(5)へとロッドを引っ張ると、切除する粘膜がゴブレット状内挿体(2)の中に引き込まれる。アンビル(8、8’)と環状ブレード(3)は適当な手段によって一方から他方へと近づけてステイプラーが閉位置になったら組織を切断する。

Description

本発明は管状臓器の粘膜切除術で使用されるステイプラーに関し、特に中心ロッドに溝を設けて、より多くの粘膜組織を的確に切除可能としたステイプラーに関する。
粘膜切除術は、痔核、直腸ヘルニア、脱漏した直腸粘膜の治療に最適な手術である。リング形状のステイプラーは既に公知であり、例えば分解式リングのように、粘膜をステイプルによって綴じる機能と粘膜を圧縮する機能の両方を兼ね備えたものがある。このようなステイプラーの中心にはロッドが設けられる。粘膜切除術では、管状臓器の粘膜をステイプラーの内部へと引き込んで、できるだけ多くの粘膜を切除する必要がある。
このような目的を達成するために、特許文献1(US6102271)が開示する環状のステイプラーは、そのヘッド部分が2つのゴブレット状外殻体と内挿体(軸方向に摺動可能に嵌合されたゴブレット状外殻体と内挿体、以下両者を表す場合にゴブレット状嵌合体と称する)で構成される。このゴブレット状外殻体の管軸部(stem:ハンドルに近い部分)近傍の外面には2つの貫通孔が設けられており、粘膜を巾着縫合した糸はこの貫通孔を通してゴブレット型ボディの外部に出される。この糸をゴブレット状外殻体の外に向けて引っ張ることにより、ボディ内部に入る限りの粘膜が引き込まれる。ボディ内部に入った粘膜はゴブレット状内挿体先端に設けた環状ブレードによって切断される。先端にアンビル(ステイプルの筒状台座部)を取り付けた中心シャフトを動かすとアンビルがゴブレット状外殻体の先端へと接近し、粘膜の切断と同時に縫合用ステイプルで綴じることができる。しかし、特許文献1に開示された上記のステイプラーでは、手動で縫合糸を引っ張るので、均一な制御方法で正確に粘膜を切除できないという欠点がある。
US6102271
本発明の目的は、このような欠点がない粘膜切除術用ステイプラーを提供することである。この目的は主要な特徴を第1請求項(ヘッド部分に、ロッド(6)が摺動可能に挿入される中心軸穴(5)を備えたゴブレット状外殻と該外殻に摺動自在に嵌挿される内挿体からなるゴブレット状嵌合体(1、2)を少なくとも備える粘膜切除術用ステイプラーにおいて、前記ロッド(6)の外周面には、1以上のリング状溝(11)が軸方向に的確に間隔を規定して設けられ、前記溝(11)は前記ロッド(6)の周囲に巾着縫合を施した部分の粘膜(9a)が収納されるよう構成したことを特徴とする)で詳細に説明したステイプラーによって達成される。他の特徴に関しては第2請求項以降で説明する。
上記目的を達成するために、本発明のステイプラーは中心ロッドを備え、その外周面にはロッド軸と直交する外周方向にリング状の溝が1以上形成されている。この溝に粘膜組織が収納されるように溝の周りで糸を巾着縫合すると、中心ロッドをゴブレット状内挿体管軸部内へと引っ張っても巾着縫合部分がロッド上をスライド移動することがない。ロッドを引っ張った時にゴブレット状内挿体へと引き込まれる管状粘膜組織の量を均一に制御できるように、溝の形状を適切に設計し、その相互間隔を厳密に決める。
本発明によるステイプラーの他の利点はロッド上に位置調整して形成された複数のリング状溝から特定のリング状溝を選択するだけで、切除する粘膜の量を的確に調節できる点である。
本発明によるステイプラーの更なる特徴や利点は以下に図面を参照して詳細に説明する2つの実施例から当業者には理解されるであろう。尚、以下の実施例は限定する目的で記載したものではない。
本発明によるステイプラーの第1実施形態において、ヘッド部分を開位置にした状態の一部切り欠き側面図である。 図1で示したステイプラーのヘッド部分を中空筒状の導入部材によって、一部切断して図示した管状臓器内に挿入した状態を示す縦断面図である。 中空筒状の導入部材を通して管状の臓器内部に挿入したステイプラーのヘッド部分を閉位置にした状態を示す縦断面図である。 本発明によるステイプラーの第2実施形態を開位置にした状態の、ヘッド部分の一部切り欠き側面図である。 中空筒状の導入部材を通して管状臓器内に挿入した図4に記載のステイプラーのヘッド部分を閉位置にした状態を、管状臓器を一部切り欠いて示した不等角投影図(鳥瞰図)である。 図5に示したステイプラーのヘッド部分の長手方向断面図である。
図1及び2は、ステイプラーのヘッド部分を示しており、第1の中空管軸部1aを有するゴブレット状外殻体1と、その内側に同軸上で摺動可能に嵌挿されたゴブレット状内挿体2を備える。ゴブレット状外殻体1よりもゴブレット状内挿体2の方が(背高が)小さい。
ゴブレット状内挿体2の先端には環状ブレード3が取り付けられ、ゴブレット状内挿体2が外殻体1内の奥まで後退した位置では、環状ブレード3はゴブレット状外殻体1の先端部4から突出せずに外殻体1内に収納されている。環状ブレード3と反対側のゴブレット状内挿体2の端部には、ロッド6が摺動可能に挿入される中心軸穴5を備えた第2の中空管軸部2aが設けられる。ロッド6は、前記中心軸穴5の摺動部と反対側の端部7にアンビル8が取り付けられるよう構成される。
図示したステイプラーのヘッド部分において、ゴブレット状外殻体1の中空管軸部1aは公知の方法でハンドル(不図示)に接続される。ステイプラーのハンドルには公知のロッド引っ張り手段(不図示)が設けられ、該手段によってロッド6を第2管軸部2aの中心軸穴5へと徐々に引き込むと、アンビル8と環状ブレード3が徐々に接近する。こうしてステイプラーのヘッド部分を閉位置にして粘膜切除をする。
ステイプラーのハンドルに設けた当業者には公知のブレード移動手段(不図示)によって環状ブレード3を前進させて粘膜を切除する。ゴブレット状外殻体2の端部4には、金属製ステイプル等の縫合手段を収納する収納部4aを設けてもよい。図2では、ステイプラーのヘッド部分が開位置で、フランジ10a、10bを備えた中空筒状の導入部材10を通して管状臓器9の中に挿入されている。
本発明では、1以上のリング状溝11がロッド6の外周面に軸方向に間隔を置いて設けられている。このリング状溝11は、糸(不図示)で巾着縫合した管状臓器9の粘膜9aが溝の中に収納されるよう設けたものである。リング状溝11の数とその間隔を調整してロッド外周面の様々な位置に巾着縫合する固定部を設けることができる。よって、切除する量が異なる場合にもそれに応じた最大量の粘膜を切除することができる。
ロッド6のリング状溝11の深さは0.5mm〜3mmとし、好ましくは約1mmにする。ロッド6の断面は断面円形であることが好ましいが、多角形であってもよい。
リング状溝11はそれぞれ、ロッド6の外周面よりも径を小さくした円軸状溝部(cylindrical surface)12と、該円軸状溝部12とロッドの外周面とを繋ぐ傾斜面(fillet surface)13より構成されている。円軸状溝部12とロッド6の外周面の外径差(傾斜面13の高低差)は、約1mm(1±0.1mm)であることが好ましい。
本発明によるステイプラーで粘膜切除術を行う場合、最初に、チューブ状臓器9の切除する粘膜9aの脱漏部を巾着縫合する。それから、開位置にあるステイプラーのヘッド部分を管状臓器9の中に挿入する。即ち、アンビル8とゴブレット状外殻体1の端部4を離間させた状態で、アンビル8を巾着縫合部に通す。このようにして、ゴブレット状外殻体1の端部4とアンビル8に挟まれた部分のロッド6周囲に、粘膜が巾着縫合された状態にする。粘膜9aの巾着縫合部をロッド6のリング状溝11の部分に位置させると、巾着縫合部分がロッド6の上をスライドしてずれることがないので、定位置に固定することができる。均一な制御方法で正確に大量の粘膜を切除するために、相互間隔を調整してロッド6に設けた複数のリング状溝11の中から1つを選択する。
図3に示すように、ゴブレット状内挿体2の管軸部2aに設けられる中心軸穴5にロッド6を引っ張るとステイプラーのヘッド部分が閉じて、切除する部分の粘膜がゴブレット状外殻体1内に入ると同時に、切除する粘膜がアンビル8によってゴブレット状外殻体1の端部4へと押圧される。
ロッド引っ張り手段でステイプラーのヘッド部分を閉じた後、ゴブレット状外殻体1の端部4の粘膜を接合手段14によって接合する。このような接合手段14は例えば、金属製のステイプルなどがよい。ゴブレット状内挿体2とその端部に設けられる環状ブレード3を適切な移動手段を使ってアンビル8の方向へ移動させることにより、ゴブレット状内挿体2の中に入った粘膜と接合手段14で接合された管状臓器9の粘膜とを分離する。そして最後に、ステイプラーのヘッド部分を管状臓器9から引き抜く。
図4、5、6は、ステイプラーのヘッド部分に分解式圧縮器具を適用した本発明の第2実施形態を説明したものである。本実施例では、アンビル8’は圧縮手段の主構成部材14’を支持している。この構成部材14’は、ステイプラーのヘッド部分を閉じた時にゴブレット状外殻体1の端部4に設けた相互補完部14’’、14’’’と相補的に連結する構成である。
粘膜切除術中は、図2、3、5、6に示されるように管状臓器9は中空筒状の導入部材10で開放状態を保つことが好ましい。
以下に本発明によるステイプラーの一実施例を参照して説明するが、ロッド6に複数のリング状溝11を設けることの利便性を説明し、アンビル8、8’と溝11間の距離と切除される粘膜の量の関係が一定していることを強調するために説明しただけで、限定する意図はない。
直径24mmの環状ブレード3と直径5mmのロッド6を備えたステイプラーにおいて、ロッド6には深さ1mmのリング状溝11が形成されており、溝11の部分でのロッド6の直径は3mmである。
例えばリング状溝11をロッド6とアンビル8、8’のつなぎ部分に配置した場合、この溝11の部分で巾着縫合すると21mmの粘膜が切除できる。これは環状ブレード3からリング状溝11までの長さ、つまり環状ブレード3の半径である12mmから溝11部分におけるロッド6の半径を引いた長さの2倍である。
更に大量の粘膜を切除するためには、アンビル8、8’からそれぞれ10mm、20mm、30mmの3カ所にリング状溝11を設けることが好ましい。これらの溝における切除可能な粘膜の長さはそれぞれ、約29mm、45mm、63.5mmとなる。図3及び図6に示す通り、アンビル8、8’と間隔をあけて溝11を設けると、ロッド6をゴブレット状内挿体2の管軸部2aへと引っ張った時に、ゴブレット状内挿体2の中に大量の粘膜を引き込むことができる。環状ブレード3から粘膜9aを巾着縫合したリング状溝11までの長さが長くなるほど引き込まれる粘膜の量も多くなる。このように、本発明のステイプラーを使用するとより迅速で、正確且つ安全な外科手術ができることは明白である。

Claims (8)

  1. ヘッド部分に、ロッド(6)が摺動可能に挿入される中心軸穴(5)を備えたゴブレット状外殻と該外殻に摺動自在に嵌挿されるゴブレット状内挿体からなるゴブレット状嵌合体(1、2)を少なくとも備える粘膜切除術用ステイプラーにおいて、
    前記ロッド(6)の外周面には、1以上のリング状溝(11)が軸方向に的確に間隔を規定して設けられ、前記溝(11)は前記ロッド(6)の周囲に巾着縫合を施した部分の粘膜(9a)が収納されるよう構成したことを特徴とする粘膜切除術用ステイプラー。
  2. 前記ロッド(6)の溝(11)の深さは0.5mmから3mmの間としたことを特徴とする請求項1記載のステイプラー。
  3. 前記ロッド(6)の溝(11)の深さを約1mm(1±0.1mm)としたことを特徴とする請求項2記載のステイプラー。
  4. 前記ロッド(6)の断面は円形であることを特徴とする請求項1〜3のいずれか1項に記載のステイプラー。
  5. 前記ロッド(6)の各リング状溝(11)は、ロッド(6)の外周面よりも直径が短い円軸状溝部(12)と、該円軸状溝部(12)とロッド(6)外周面とを繋ぐように傾斜する傾斜面(13)により形成されることを特徴とする請求項1〜4のいずれか1項に記載のステイプラー。
  6. 前記傾斜面(13)において、前記円軸状溝部(12)側と前記ロッド(6)外周面側の高低差が1mmであることを特徴とする請求項5に記載のステイプラー。
  7. ゴブレット状外殻体(1)の中により小さい背高サイズのゴブレット状内挿体(2)が同軸上に摺動可能に設けられ、
    該ゴブレット状内挿体(2)は、先端部には環状ブレード(3)が取り付けられ、管軸部(2a)には前記ロッド(6)が摺動可能に挿入される中心軸穴(5)が備えられることを特徴とする請求項1〜6のいずれか1項に記載のステイプラー。
  8. 前記ロッド(6)の端部(7)にアンビル(8、8’)が固定して取り付けられることを特徴とする請求項1〜7のいずれか1項に記載のステイプラー。
JP2009552331A 2007-03-07 2007-03-07 粘膜切除術用ステイプラー Expired - Fee Related JP5070300B2 (ja)

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ATE499048T1 (de) 2011-03-15
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