JP3796805B2 - Endoscopic treatment tool - Google Patents

Endoscopic treatment tool Download PDF

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Publication number
JP3796805B2
JP3796805B2 JP09955896A JP9955896A JP3796805B2 JP 3796805 B2 JP3796805 B2 JP 3796805B2 JP 09955896 A JP09955896 A JP 09955896A JP 9955896 A JP9955896 A JP 9955896A JP 3796805 B2 JP3796805 B2 JP 3796805B2
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Japan
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treatment instrument
endoscope
length
treatment
guide tube
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JP09955896A
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Japanese (ja)
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JPH09262241A (en
Inventor
光夫 近藤
薫 荒井
伸治 高橋
嘉之 石川
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Fujinon Corp
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Fujinon Corp
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Description

【0001】
【発明の属する技術分野】
本発明は、鉗子や高周波処置具等、内視鏡の処置具挿通路を介して体腔内等に挿入される内視鏡用処置具に関するものである。
【0002】
【従来の技術】
内視鏡検査において、細胞を採取したり、患部の治療を行ったりするために、処置具が用いられる。この処置具は内視鏡に設けた処置具挿通路に挿入することによって、体腔内等に導かれる。
【0003】
図8に内視鏡用処置具の一例として、鉗子の構成を示す。この図から明らかなように、鉗子1は、先端に一対の把持爪2a,2bからなる作動部2を有し、この作動部2にはコントロールケーブル3が接続されている。コントロールケーブル3は、外套管として、金属線材を密着した螺旋状に巻回した密着コイル4内に把持爪2a,2bの開閉を遠隔操作で行うための操作ワイヤ5を挿通させたものであって、このコントロールケーブル3の基端部には、操作ワイヤ5を押し引き操作するための操作部6が連結されている。この鉗子1は、内視鏡に設けた処置具挿通路を介して体腔内に挿入し、この挿入部の先端から所定の長さ突出させて、操作部6により操作ワイヤ5を押し引き操作することにより把持爪2a,2bを開閉させることによって、患部の摘出等所要の処置が行われる。
【0004】
【発明が解決しようとする課題】
ところで、鉗子等の処置具が挿通される内視鏡には、その観察部に対物レンズが設けられるが、この対物レンズとしては焦点距離の短い広角レンズを用いているものもあり、良好な観察ができるのは観察部に近い位置であり、内視鏡の種類にもよるが、通常は、観察部で明確に観察できる範囲は、この観察部から例えば最大限50mm程度離れた位置までとなっている。従って、術者が処置具を操作する際に、処置具を挿入部の先端から50mm以上は突出させないことが必要になる。以上の点からは、前述した鉗子1におけるコントロールケーブル3の長さは、作動部2が挿入部の先端から所要長さ突出できる寸法とすれば良い。
【0005】
ただし、内視鏡の種類等に応じて、処置具挿通路の長さにはかなりの差があるために、コントロールケーブル3の長さを制限すると、使用する内視鏡によっては、処置具挿通路から作動部2を突出できなくなることがある。このために、コントロールケーブル3は、通常は、処置具挿通路の長さよりかなり長めに形成されている。従って、実際に処置具を使用して処置を行う際には、術者の側で挿入長さを制御しなければならず、この制御は極めて煩わしいものとなっていた。
【0006】
本発明は以上の点に鑑み、内視鏡をガイドとして挿入される処置具において、処置具の挿入部の先端からの最大突出長さを適正な範囲に規制できるようになし、かつ内視鏡の種類等による処置具挿通路の長さ寸法に違いに応じて、その規制位置を容易に調整できるようにすることを目的としている。
【0007】
【課題を解決するための手段】
前述した目的を達成するために、本発明は、先端に作動部を設け、この作動部から所定の長さ分にわたって密着コイルを延在させてなり、内視鏡の処置具挿通路に着脱可能に装着される筒状部材を介して挿通される処置具であって、前記密着コイルのコイルピッチとほぼ一致するめねじ部が形成されて、この密着コイルに軸線方向に位置調整可能に螺合させた検出部材を設け、また前記筒状部材には前記検出部材が当接するストッパ部を設けて、このストッパ部に前記検出部材が当接する位置を前記作動部の処置具導出部からの最大突出長さとする構成としたことをその特徴とするものである。
【0008】
【発明の実施の形態】
以下、本発明の好ましい実施の形態を図面を参照して説明する。なお、以下の説明では、内視鏡に挿通される処置具としては、図8に示されているように、先端に把持部を有する鉗子として構成したものについて説明するが、本発明の内視鏡用処置具は、この鉗子だけでなく、作動部に密着コイルが連結されている処置具一般に適用できる。また、鉗子自体の構成としては、図8のものと格別変わらないので、それと同一の構成については、同一の符号を付して、その説明は省略する。
【0009】
まず、図1に内視鏡に鉗子を挿通させた状態を示す。同図から明らかなように、内視鏡10は本体操作部11に体腔等の内部に挿入される挿入部12を連設してなるものであり、挿入部12は本体操作部11への連設部から大半の長さは軟性部12aからなり、この軟性部12aにはアングル部12bが、アングル部12bには先端部本体12cが連設されている。
【0010】
本体操作部11の先端側の部位には、処置具導入部13が設けられており、また挿入部12の先端部本体12cの端面(または側面)には、図示は省略するが、ライトガイドの出射端が臨む照明用レンズを設けた照明部と、対物レンズを装着した観察部とが設けられ、また処置具導出部14が開口している。そして、処置具導入部13からこの処置具導出部14までの間は可撓性部材からなる処置具挿通路(図示せず)となっており、これら全体で処置具挿通路が構成される。従って、処置具としての鉗子1は、その作動部2を処置具導入部13から挿入して、挿入部12の先端まで導いて、処置具導出部14から突出させて、作動部2を構成する把持部2a,2bを開閉操作することにより所要の処置が行われる。
【0011】
ここで、鉗子1には検出手段15が設けられて、その作動部2の処置具導出部14からの突出長さを検出して、最大突出長さ以上は突出しないように規制できるようになっている。この検出手段15は、基本的には、本体操作部11側で、この検出手段15と処置具導入部13との相対位置関係に基づいて、作動部2が処置具導出部14からどの程度突出しているか、を表示する指標としての機能を発揮するものである。この検出手段15には、また作動部2の最大突出長さ位置で規制するための機能を持たせることができ、さらに作動部2が処置具導出部14に臨む位置も検出できるようにもなる。
【0012】
そこで、まず図2乃至図4には、検出手段の第1のタイプを示す。この検出手段は、図2に示したように、検出駒20とガイド筒21とから構成され、検出駒20は鉗子1におけるコントロールケーブル3に装着され、またガイド筒21は処置具導入部13に着脱可能に装着されるものである。
【0013】
検出駒20は、先端側が薄肉の筒状部20aで、この筒状部20aには外周面側の肉厚が連続的に大きくなるテーパ部20bが連設され、またテーパ部20bには均一な外径の太径部20cが、さらに太径部20cの端部にフランジ部20dが形成されている。そして、検出駒20の中心部には、軸線方向に貫通する通路22が形成されている。この通路22のうち、筒状部20aからテーパ部20bにかけての部位は、鉗子1のコントロールケーブル3の外套管である密着コイル4の外径より大きな挿通部22aとなっており、この挿通部22aに連なり、フランジ部20dの端部までの部位はめねじ部22bとなっている。めねじ部22bは、そのピッチが密着コイル4のピッチと一致しており、従って検出駒20は密着コイル4に嵌合させた状態で回転させることによって、この密着コイル4の軸線方向に変位できるものである。
【0014】
一方、ガイド筒21は、処置具導入部13に着脱可能に装着される筒状の部材である。このガイド筒21の先端部には処置具導入部13における硬質パイプからなる導入通路13aに嵌合される連結部21aに、検出駒20のテーパ部20bに対応するテーパ孔部21bを連設し、さらに検出駒20の太径部20cより僅かに大きい孔径を有する大径部21cとなっており、先端部分は外方に突出するフランジ部21dとなっており、これらテーパ孔部21b及びフランジ部21dの少なくとも一方がストッパ部を構成する。また、検出駒20における太径部20cとフランジ部20dとの移行部から筒状部20aの先端までの軸線方向の長さを、鉗子1の処置具導出部14からの最大突出長さまでのストロークに一致する寸法を持たせる。これによって、作動部2が処置具導出部14に臨む状態と、最大突出長さまで突出した状態とを検出できるようになる。
【0015】
また、ガイド筒21を処置具導入部13に固定するために、テーパ孔部21bの部位の外周面には、処置具導入部13に形成され、栓部材等を装着するためのねじ部13bに螺合されるねじ部23が形成されている。さらに、連結部21aと導入通路13aとの間、及びガイド筒21と処置具導入部13の入口部分との間には、それぞれOリング等からなるシール部材25が介装されている。
【0016】
検出手段は以上のように構成されるが、検出駒20は予めコントロールケーブル3の密着コイル4に嵌合されて、その通路22におけるねじ部22bを密着コイル4と螺合した状態に保持する。また、処置具導入部13には、通常は栓部材がねじ部13bに螺挿されているが、この栓部材を脱着して、この栓部材に代えてガイド筒21を、そのねじ部23を処置具導入部13のねじ部13bに螺挿させて、連結部21aを導入通路13aに連結するようにして固定する。
【0017】
鉗子1を実際に使用する前の段階で、処置具挿通路の長さに応じて、検出駒20の密着コイル4における軸線方向の位置を調整する。実際には、内視鏡10を体腔内に挿入する前の段階で、鉗子1を処置具挿通路に挿通させて、作動部2を最大長さまで突出する位置に送り込む。この状態で、検出駒20を螺回して、この検出駒20のフランジ部20dが、処置具導入部13に装着したガイド筒21のフランジ部21dに当接する位置まで変位させて、その位置に保持する。
【0018】
内視鏡10の挿入部12を体腔内に挿入し、挿入部12を所定の観察対象部に向けて観察窓から得られる体腔内の映像に基づいて、体腔内の検査・診断が行われる。この間において、鉗子1を用いて細胞の採取や臓器の把持等を行う必要がある場合には、鉗子1を処置具導入部13に装着したガイド筒21内に挿入する。鉗子1の作動部2は処置具導入部13から処置具導出部14に至る。
【0019】
内視鏡10の観察部の視野は鉗子1が導出される方向に向いているので、作動部2が処置具導出部14に至ったことは、内視鏡10の観察部では確認できない。しかしながら、術者は手元において、処置具導入部13を目視することによりその位置の確認を行える。即ち、検出駒20の太径部20cから筒状部20aの先端までの軸線方向の長さは鉗子1の処置具導出部14からの突出長さと一致しているので、図3に示したように、処置具導入部13に装着したガイド筒21の端部に検出駒20の筒状部20の先端部が到達すると、鉗子1の先端部が処置具導出部14の端部に至ったことを確認できる。従って、鉗子1を処置具挿通路内に挿入している間に、その作動部2が突然処置具導出部14から突出するということがなくなる。従って、鉗子1の作動部2が処置具導出部14から突出する寸前の状態で、内視鏡10の観察部で得られる映像に基づいて、体腔内壁が挿入部12の先端に異常に接近していないかの確認を行えば、鉗子1の作動部2が不意に処置具導出部14から突出して体腔内壁を傷付ける等のおそれはない。
【0020】
前述した検出駒20の筒状部20の端部がガイド筒21の端部と一致する作動部2の処置具導出部14に臨む位置から、さらに鉗子1を押し込むと、図4のように、この検出駒20のテーパ部20bがガイド筒21に形成したテーパ孔部21bに当接するか、またはフランジ部20dがフランジ部21dに当接して、それ以上送り出せなくなる。この位置が最大突出位置であり、鉗子1はこの最大突出位置までのストロークで出し入れ操作が行われる。従って、処置具1をこのストローク範囲で適宜動かしながら、操作部6を操作して、作動部2における把持部2a,2bを開閉させることにより、処置を行うべき体内組織や臓器等を把持したり、切除したりすることができる。このように、鉗子1の作動部2の突出長さが検出駒20のガイド筒21への当接により規制されることから、この鉗子1の作動部2が必要以上突出することがなくなるので、鉗子1の操作の安全性を図ることができ、その操作性が向上する。
【0021】
処置具挿通路の長さ寸法が異なる内視鏡に鉗子1を用いる場合には、前述と同様にして、内視鏡の処置具導入部に鉗子1を挿入して、その作動部が最大突出長さまで処置具導出部から突出させた状態で、検出駒20を螺回させることにより、密着コイル4の軸線方向に変位させて、フランジ部20dをガイド筒21のフランジ部21dと当接させる位置に配置する。また、内視鏡の種類によっては、最大突出長さが変わってくることがある。この場合には、検出駒20の筒状部20の端部がガイド筒21の端部と一致する位置は、作動部2の処置具導出部14に臨む位置ではなく、筒状部20aがガイド筒21にある程度入り込んだ時に作動部2が処置具導出部14に臨む位置となる。従って、筒状部20aの外面に目盛りやマーク等の表示を設けておけば、この表示に基づいて処置具の先端が処置具導出部に臨んだことを検出できる。
【0022】
次に、図5乃至図7に第2のタイプの検出手段の構成を示す。このタイプの検出手段にあっても、検出駒30とガイド筒31が用いられる。ただし、検出駒30は所定の外径を有し、中心部に軸線方向に貫通するねじ孔30aを有し、中間部がくびれた円形ブロック状の部材である。このねじ孔30aはコントロールケーブル3の外套管を構成する密着コイル4と同じピッチを持ったものであり、これによって検出駒30は螺回することにより、軸線方向に位置調整できる。この点は第1のタイプの検出手段と実質的に変わるものではない。また、ガイド筒31は、処置具導入部13の導入通路13aに連結される連結部31aとテーパ孔部31bと、大径部31cとを有し、大径部31cは検出駒30を挿嵌させる孔径となっており、テーパ孔部31bは検出駒30が通過できない大きさであり、従ってテーパ孔部31bがストッパ部を構成する。そして、ガイド筒31における大径部31cの軸線方向の長さは、鉗子1の処置具導出部14からの突出長さと実質的に同じ寸法に形成されている。
【0023】
以上のように構成することによって、第1のタイプの検出手段と同様、予め鉗子1を内視鏡10の処置具導入部13から処置具挿通路内に挿入した状態で、検出駒30を螺回させて、検出駒30の位置調整を行うことにより、術者の手元側で鉗子1の処置具導入部13に臨む位置と、鉗子1を最大長さ突出させた位置とを検出でき、しかも最大突出長さ以上突出するのを規制できる。
【0024】
ここで、鉗子1の最大突出長さの状態では、検出駒30はガイド筒31内に完全に入り込んでしまうから、検出駒30は鉗子1の作動部2を処置具導出部14に臨ませた位置において、検出駒30がガイド筒31の端部に臨む位置となるように位置調整を行う。ガイド筒31の長さは、作動部2が処置具導出部14に臨む位置から最大突出長さ位置までの距離とほぼ同じであるから、検出駒30の位置調整を以上のようにして行えば、検出駒30がガイド筒31におけるテーパ孔部31bで規制される位置まで挿入された状態では、鉗子1の作動部2が最大突出長さ状態になる。
【0025】
以上のように、2つのタイプの検出手段を例示したが、鉗子のコントロールケーブル等のように、外套管が密着コイルで形成されており、これによって外面形状があたかもおねじの形状となっている処置具にあっては、このおねじ形状の部位に螺合する検出駒を装着して、この検出駒の螺回により密着コイルの軸線方向の位置調整を行い、この検出駒の位置を検出することにより、内視鏡の観察部の映像で確認しなくとも、手元において、検出駒の位置を目視するだけで、処置具の先端における作動部の位置を明確に認識できる。従って、内視鏡の種類等によって、処置具挿通路の長さが一様でないために、処置具におけるコントロールケーブルの長さを、処置具挿通路の長さよりかなり長くして、処置具挿通路内に挿入する長さを調整しながら行われる処置具の操作性が著しく向上する。しかも、最大突出長さに達すると、検出駒とガイド筒との間でストッパ機能を発揮して、処置具をそれ以上突出できなくなるので安全性の観点からも有利である。
【0026】
【発明の効果】
以上説明したように、本発明は、処置具における密着コイルに、そのコイルピッチとほぼ一致するめねじ部を形成して、螺回により密着コイルの軸線方向に位置調整可能な検出手段を設けて、処置具導出部からの処置具の作動部の最大突出長さを処置具導入部側で検出可能としているので、処置具の挿入部の先端からの突出長さを確実に適正な範囲に規制でき、しかも内視鏡の種類等に応じて処置具挿通路の長さが変化しても、この処置具挿通路の長さに応じて、検出手段の位置調整を容易に行える等の効果を奏する。
【図面の簡単な説明】
【図1】本発明の実施の一形態を示す処置具と内視鏡との外観図である。
【図2】第1のタイプの検出手段を、処置具導入部と共に示す断面図である。
【図3】処置具を処置具導出部に臨む位置まで挿入させた状態での検出手段を、処置具導入部と共に示す断面図である。
【図4】処置具の最大突出長さ状態での検出手段を、処置具導入部と共に示す断面図である。
【図5】第2のタイプの検出手段を、処置具導入部と共に示す断面図である。
【図6】処置具を処置具導出部に臨む位置まで挿入させた状態での検出手段を、処置具導入部と共に示す断面図である。
【図7】処置具の最大突出長さ状態での検出手段を、処置具導入部と共に示す断面図である。
【図8】処置具の一例としての鉗子を、一部を破断にして示す外観図である。
【符号の説明】
1 鉗子
2 作動部
3 コントロールケーブル
4 密着コイル
10 内視鏡
11 本体操作部
12 挿入部
13 処置具導入部
14 処置具導出部
15 検出手段
20,30 検出駒
20d フランジ部
21,31 ガイド筒
21b,31b テーパ孔部
21c,31c 大径部
21d フランジ部
22 通路
22a 挿通部
22b めねじ部
30a ねじ孔
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an endoscope treatment tool that is inserted into a body cavity or the like via a treatment tool insertion passage of an endoscope, such as forceps and a high-frequency treatment tool.
[0002]
[Prior art]
In endoscopy, a treatment tool is used to collect cells or treat an affected area. The treatment instrument is guided into a body cavity or the like by being inserted into a treatment instrument insertion path provided in the endoscope.
[0003]
FIG. 8 shows a configuration of forceps as an example of an endoscope treatment tool. As is clear from this figure, the forceps 1 has an operating part 2 composed of a pair of gripping claws 2a and 2b at the tip, and a control cable 3 is connected to the operating part 2. The control cable 3 is an outer tube in which an operation wire 5 for remotely opening and closing the gripping claws 2a and 2b is inserted into a close contact coil 4 wound in a spiral shape with a metal wire closely attached thereto. An operation portion 6 for pushing and pulling the operation wire 5 is connected to the base end portion of the control cable 3. The forceps 1 is inserted into a body cavity through a treatment instrument insertion passage provided in the endoscope, protrudes a predetermined length from the distal end of the insertion portion, and the operation wire 5 is pushed and pulled by the operation portion 6. Thus, by opening and closing the grip claws 2a and 2b, necessary treatment such as extraction of the affected area is performed.
[0004]
[Problems to be solved by the invention]
Incidentally, the endoscope treatment tool such as forceps is inserted, there is an objective lens is provided in the observation unit, even those with a short wide-angle lens of focal length as the objective lens, good The position that can be observed is close to the observation part, and depending on the type of endoscope, the range that can be clearly observed by the observation part is usually up to about 50 mm away from this observation part. It has become. Therefore, when the surgeon operates the treatment tool, it is necessary that the treatment tool does not protrude more than 50 mm from the distal end of the insertion portion. From the above points, the length of the control cable 3 in the above-described forceps 1 may be set to a dimension that allows the operating portion 2 to project a required length from the distal end of the insertion portion.
[0005]
However, since there is a considerable difference in the length of the treatment instrument insertion path depending on the type of endoscope, if the length of the control cable 3 is limited, depending on the endoscope used, the treatment instrument insertion The operating unit 2 may not be able to protrude from the passage. For this reason, the control cable 3 is usually formed considerably longer than the length of the treatment instrument insertion path. Therefore, when the treatment is actually performed using the treatment tool, the insertion length must be controlled by the operator, and this control is extremely troublesome.
[0006]
In view of the above points, the present invention provides a treatment instrument to be inserted using an endoscope as a guide so that the maximum protruding length from the distal end of the insertion portion of the treatment instrument can be regulated within an appropriate range, and the endoscope It is an object of the present invention to make it possible to easily adjust the restriction position according to the difference in the length dimension of the treatment instrument insertion path depending on the type of the treatment tool.
[0007]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, the present invention is provided with an operating portion at the distal end, and a contact coil is extended from the operating portion over a predetermined length so that it can be attached to and detached from the treatment instrument insertion passage of the endoscope. A treatment instrument inserted through a cylindrical member attached to the inner surface of the contact coil, wherein a female thread portion that substantially matches the coil pitch of the contact coil is formed and screwed into the contact coil so that the position thereof can be adjusted in the axial direction. The cylindrical member is provided with a stopper portion against which the detection member abuts, and the position where the detection member abuts against the stopper portion is defined as the maximum projecting length from the treatment instrument derivation portion of the operating portion. it is an its features that it has a structure to be.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. In the following description, the treatment instrument inserted through the endoscope will be described as a forceps having a grasping portion at the tip as shown in FIG. The treatment tool for a mirror can be applied not only to the forceps but also to a treatment tool in which a close-contact coil is connected to an operating part. Further, since the configuration of the forceps itself is not particularly different from that of FIG. 8, the same configuration is denoted by the same reference numeral, and the description thereof is omitted.
[0009]
First, FIG. 1 shows a state where forceps are inserted through an endoscope. As is apparent from the figure, the endoscope 10 has a main body operation unit 11 and an insertion unit 12 inserted into a body cavity or the like, and the insertion unit 12 is connected to the main body operation unit 11. Most of the length from the installation portion is composed of a soft portion 12a, and an angle portion 12b is connected to the soft portion 12a, and a tip end body 12c is connected to the angle portion 12b.
[0010]
A treatment instrument introducing portion 13 is provided at a distal end side portion of the main body operation portion 11, and the end surface (or side surface) of the distal end portion main body 12 c of the insertion portion 12 is omitted from illustration, although not shown. An illuminating unit provided with an illuminating lens facing the emission end and an observation unit equipped with an objective lens are provided, and the treatment instrument deriving unit 14 is opened. And between the treatment tool introduction part 13 and this treatment tool derivation | leading-out part 14, it is a treatment tool insertion path (not shown) which consists of a flexible member, and these treatment tool insertion paths are comprised by these. Therefore, the forceps 1 as the treatment instrument inserts the operation part 2 from the treatment instrument introduction part 13, guides it to the distal end of the insertion part 12, and protrudes from the treatment instrument lead-out part 14 to constitute the operation part 2. Necessary measures are performed by opening and closing the grips 2a and 2b.
[0011]
Here, the forceps 1 is provided with a detecting means 15 so that the protruding length of the operating portion 2 from the treatment instrument outlet portion 14 can be detected and regulated so as not to protrude beyond the maximum protruding length. ing. This detection means 15 is basically the extent to which the operating part 2 protrudes from the treatment instrument deriving part 14 on the main body operation part 11 side based on the relative positional relationship between this detection means 15 and the treatment instrument introduction part 13. It serves as an index for displaying whether or not. This detecting means 15 can also have a function for regulating the position of the operating portion 2 at the maximum protruding length position, and can also detect the position at which the operating portion 2 faces the treatment instrument deriving portion 14. .
[0012]
First, FIGS. 2 to 4 show a first type of detection means. As shown in FIG. 2, the detection means includes a detection piece 20 and a guide tube 21, the detection piece 20 is attached to the control cable 3 in the forceps 1, and the guide tube 21 is attached to the treatment instrument introduction unit 13. It is detachably mounted.
[0013]
The detection piece 20 has a thin cylindrical portion 20a on the tip side, and a tapered portion 20b having a continuously increasing thickness on the outer peripheral surface side is continuously connected to the cylindrical portion 20a, and the tapered portion 20b is uniform. A large-diameter portion 20c having an outer diameter is formed, and a flange portion 20d is further formed at the end of the large-diameter portion 20c. A passage 22 penetrating in the axial direction is formed at the center of the detection piece 20. A portion of the passage 22 from the cylindrical portion 20a to the tapered portion 20b is an insertion portion 22a larger than the outer diameter of the close contact coil 4 that is the outer tube of the control cable 3 of the forceps 1, and this insertion portion 22a. The portion to the end of the flange portion 20d is a female screw portion 22b. The pitch of the female screw portion 22b matches the pitch of the close contact coil 4. Therefore, the detection piece 20 can be displaced in the axial direction of the close contact coil 4 by rotating it while being fitted to the close contact coil 4. Is.
[0014]
On the other hand, the guide cylinder 21 is a cylindrical member that is detachably attached to the treatment instrument introducing portion 13. A tapered hole portion 21 b corresponding to the tapered portion 20 b of the detection piece 20 is continuously provided at the distal end portion of the guide tube 21 to the connecting portion 21 a fitted into the introduction passage 13 a made of a hard pipe in the treatment instrument introducing portion 13. Furthermore, a large-diameter portion 21c having a slightly larger hole diameter than the large-diameter portion 20c of the detection piece 20 is formed, and a tip end portion is a flange portion 21d that protrudes outward. The tapered hole portion 21b and the flange portion At least one of 21d constitutes a stopper portion. In addition, the length in the axial direction from the transition portion between the large-diameter portion 20c and the flange portion 20d of the detection piece 20 to the distal end of the cylindrical portion 20a is the stroke from the treatment instrument deriving portion 14 of the forceps 1 to the maximum protruding length. Have dimensions that match Accordingly, it is possible to detect the state in which the operating unit 2 faces the treatment instrument deriving unit 14 and the state in which the operating unit 2 protrudes to the maximum protruding length.
[0015]
Further, in order to fix the guide tube 21 to the treatment instrument introducing portion 13, a treatment instrument introducing portion 13 is formed on the outer peripheral surface of the tapered hole portion 21b, and a screw portion 13b for attaching a plug member or the like is provided. A screw part 23 to be screwed is formed. Further, seal members 25 each composed of an O-ring or the like are interposed between the connecting portion 21a and the introduction passage 13a and between the guide tube 21 and the inlet portion of the treatment instrument introduction portion 13.
[0016]
Although the detection means is configured as described above, the detection piece 20 is fitted in the close contact coil 4 of the control cable 3 in advance and holds the screw portion 22b in the passage 22 in a state of being screwed with the close contact coil 4. In addition, a plug member is usually screwed into the threaded portion 13b in the treatment instrument introducing portion 13, but this plug member is detached, and the guide tube 21 is replaced with the screw member 23 instead of the plug member. The connecting portion 21a is fixed so as to be connected to the introducing passage 13a by being screwed into the screw portion 13b of the treatment instrument introducing portion 13.
[0017]
Before the forceps 1 is actually used, the position of the detection piece 20 in the close contact coil 4 in the axial direction is adjusted according to the length of the treatment instrument insertion path. Actually, before inserting the endoscope 10 into the body cavity, the forceps 1 is inserted into the treatment instrument insertion path, and the operating portion 2 is sent to a position protruding to the maximum length. In this state, the detection piece 20 is screwed, and the flange portion 20d of the detection piece 20 is displaced to a position where it abuts on the flange portion 21d of the guide tube 21 attached to the treatment instrument introduction portion 13, and is held at that position. To do.
[0018]
The insertion portion 12 of the endoscope 10 is inserted into the body cavity, and the inspection / diagnosis in the body cavity is performed based on the image in the body cavity obtained from the observation window with the insertion portion 12 directed toward a predetermined observation target portion. During this time, when it is necessary to collect cells or grasp an organ using the forceps 1, the forceps 1 is inserted into the guide tube 21 attached to the treatment instrument introduction unit 13. The operating part 2 of the forceps 1 extends from the treatment tool introduction part 13 to the treatment tool lead-out part 14.
[0019]
Since the visual field of the observation part of the endoscope 10 is directed in the direction in which the forceps 1 is led out, it cannot be confirmed by the observation part of the endoscope 10 that the operation part 2 has reached the treatment instrument lead-out part 14. However, the operator can confirm the position by visually observing the treatment instrument introducing portion 13 at hand. That is, the length in the axial direction from the large-diameter portion 20c of the detection piece 20 to the tip of the cylindrical portion 20a coincides with the protruding length of the forceps 1 from the treatment instrument deriving portion 14, and as shown in FIG. When the distal end of the cylindrical portion 20 a of the detection piece 20 reaches the end of the guide tube 21 attached to the treatment instrument introducing portion 13, the distal end of the forceps 1 reaches the end of the treatment instrument deriving portion 14. I can confirm that. Therefore, the operating portion 2 does not suddenly protrude from the treatment instrument outlet 14 while the forceps 1 is being inserted into the treatment instrument insertion path. Accordingly, the inner wall of the body cavity approaches the distal end of the insertion portion 12 abnormally based on the image obtained by the observation portion of the endoscope 10 in a state just before the operation portion 2 of the forceps 1 protrudes from the treatment instrument lead-out portion 14. If confirmation is made, there is no risk that the operating portion 2 of the forceps 1 will unexpectedly protrude from the treatment instrument outlet 14 and damage the inner wall of the body cavity.
[0020]
From a position facing the treatment instrument lead-out portion 14 of the actuating unit 2 ends of the cylindrical portion 20 a of the detection piece 20 described above is coincident with the end of the guide tube 21, is further pushed forceps 1, as shown in FIG. 4 The taper portion 20b of the detection piece 20 comes into contact with the taper hole portion 21b formed in the guide tube 21, or the flange portion 20d comes into contact with the flange portion 21d, and cannot be fed any further. This position is the maximum protruding position, and the forceps 1 are put in and out with a stroke up to the maximum protruding position. Accordingly, by operating the operation unit 6 while appropriately moving the treatment instrument 1 within this stroke range, the grasping units 2a and 2b in the operating unit 2 are opened and closed, thereby grasping a body tissue or organ to be treated. Can be excised. In this way, since the protruding length of the operating portion 2 of the forceps 1 is regulated by the contact of the detection piece 20 to the guide tube 21, the operating portion 2 of the forceps 1 does not protrude more than necessary. The safety of the operation of the forceps 1 can be achieved, and the operability is improved.
[0021]
When the forceps 1 is used for an endoscope having a different length of the treatment instrument insertion passage, the forceps 1 is inserted into the treatment instrument introduction portion of the endoscope in the same manner as described above, and the operating portion protrudes to the maximum. A position where the flange 20d is brought into contact with the flange portion 21d of the guide tube 21 by being displaced in the axial direction of the contact coil 4 by screwing the detection piece 20 in a state of protruding from the treatment instrument leading portion to the length. To place. In addition, the maximum protruding length may vary depending on the type of endoscope. In this case, the position where the end portion of the cylindrical portion 20 a of the detection piece 20 coincides with the end of the guide tube 21 is not a position facing to the treatment instrument lead-out portion 14 of the operating portion 2, the tubular portion 20a When the guide tube 21 enters the guide tube 21 to some extent, the operating unit 2 faces the treatment instrument lead-out unit 14. Therefore, if a display such as a scale or a mark is provided on the outer surface of the cylindrical portion 20a, it is possible to detect that the distal end of the treatment instrument has faced the treatment instrument deriving portion based on this display.
[0022]
Next, FIGS. 5 to 7 show the configuration of the second type detection means. Even in this type of detection means, the detection piece 30 and the guide cylinder 31 are used. However, the detection piece 30 is a circular block member having a predetermined outer diameter, a screw hole 30a penetrating in the axial direction at the center, and a constricted middle portion. The screw holes 30a have the same pitch as that of the contact coil 4 constituting the outer tube of the control cable 3, and the detection piece 30 can be screwed to adjust the position in the axial direction. This point is not substantially different from the first type detection means. The guide tube 31 has a connecting portion 31 a connected to the introduction passage 13 a of the treatment instrument introducing portion 13, a tapered hole portion 31 b, and a large diameter portion 31 c, and the large diameter portion 31 c is inserted into the detection piece 30. The tapered hole portion 31b has a size that the detection piece 30 cannot pass through, and therefore the tapered hole portion 31b constitutes a stopper portion. The length of the large diameter portion 31 c in the guide tube 31 in the axial direction is formed to have substantially the same dimension as the protruding length of the forceps 1 from the treatment instrument lead-out portion 14.
[0023]
With the configuration described above, the detection piece 30 is screwed in a state in which the forceps 1 is previously inserted into the treatment instrument insertion path from the treatment instrument introduction portion 13 of the endoscope 10 as in the first type detection means. By rotating and adjusting the position of the detection piece 30, it is possible to detect the position of the forceps 1 facing the treatment instrument introducing portion 13 on the operator's hand side and the position where the forceps 1 protrudes the maximum length. Protrusion beyond the maximum protrusion length can be restricted.
[0024]
Here, in the state of the maximum protruding length of the forceps 1, the detection piece 30 completely enters the guide tube 31, so that the detection piece 30 faces the operating part 2 of the forceps 1 to the treatment instrument outlet 14. In the position, the position adjustment is performed so that the detection piece 30 faces the end of the guide tube 31. Since the length of the guide tube 31 is substantially the same as the distance from the position where the operating unit 2 faces the treatment instrument outlet 14 to the maximum protruding length position, the position of the detection piece 30 can be adjusted as described above. In the state where the detection piece 30 is inserted to the position regulated by the tapered hole portion 31b in the guide tube 31, the operating portion 2 of the forceps 1 is in the maximum projecting length state.
[0025]
As described above, two types of detection means have been exemplified, but the outer tube is formed of a close-contact coil, such as a forceps control cable, so that the outer surface is shaped like a male screw. In the treatment instrument, by attaching a detection piece to be screwed to the male screw-shaped portion, adjusting the position of the close contact coil in the axial direction by screwing the detection piece, and detecting the position of the detection piece Without confirming with the image of the observation part of the endoscope, the position of the operating part at the distal end of the treatment tool can be clearly recognized only by visually observing the position of the detection piece at hand. Accordingly, since the length of the treatment instrument insertion path is not uniform depending on the type of endoscope, the length of the control cable in the treatment instrument is considerably longer than the length of the treatment instrument insertion path, The operability of the treatment tool performed while adjusting the length to be inserted into the inside is remarkably improved. Moreover, when the maximum protrusion length is reached, a stopper function is exhibited between the detection piece and the guide tube, and the treatment instrument cannot protrude any further, which is advantageous from the viewpoint of safety.
[0026]
【The invention's effect】
As described above, the present invention provides a close-fitting coil in a treatment instrument with a female thread portion that substantially matches the coil pitch, and is provided with detection means that can be adjusted in the axial direction of the close-contact coil by screwing. Since the maximum protrusion length of the operating part of the treatment tool from the treatment tool lead-out part can be detected on the treatment tool introduction part side, the protrusion length from the distal end of the insertion part of the treatment tool can be reliably restricted to an appropriate range. In addition, even if the length of the treatment instrument insertion passage changes depending on the type of endoscope, the position of the detection means can be easily adjusted according to the length of the treatment instrument insertion passage. .
[Brief description of the drawings]
FIG. 1 is an external view of a treatment tool and an endoscope showing an embodiment of the present invention.
FIG. 2 is a cross-sectional view showing a first type detection means together with a treatment instrument introducing section.
FIG. 3 is a cross-sectional view showing the detection means together with the treatment instrument introduction section in a state where the treatment instrument is inserted to a position facing the treatment instrument lead-out section.
FIG. 4 is a cross-sectional view showing detection means in a state where the treatment tool is in a maximum protruding length together with a treatment tool introduction unit.
FIG. 5 is a cross-sectional view showing a second type of detection means together with a treatment instrument introducing section.
FIG. 6 is a cross-sectional view showing the detection means together with the treatment instrument introduction section in a state where the treatment instrument is inserted to a position facing the treatment instrument lead-out section.
FIG. 7 is a cross-sectional view showing the detection means in the state in which the treatment instrument is in the maximum protruding length together with the treatment instrument introduction part.
FIG. 8 is an external view showing a forceps as an example of a treatment tool with a part broken away.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Forceps 2 Actuation part 3 Control cable 4 Adhesion coil 10 Endoscope 11 Main body operation part 12 Insertion part 13 Treatment tool introduction part 14 Treatment tool lead-out part 15 Detection means 20, 30 Detection piece 20d Flange part 21, 31 Guide cylinder 21b, 31b Taper hole 21c, 31c Large diameter part 21d Flange part 22 Passage 22a Insertion part 22b Female thread part 30a Screw hole

Claims (3)

先端に作動部を設け、この作動部から所定の長さ分にわたって密着コイルを延在させてなり、内視鏡の処置具挿通路に着脱可能に装着される筒状部材を介して挿通される処置具において、前記密着コイルのコイルピッチとほぼ一致するめねじ部が形成されて、この密着コイルに軸線方向に位置調整可能に螺合させた検出部材を設け、また前記筒状部材には前記検出部材が当接するストッパ部を設けて、このストッパ部に前記検出部材が当接する位置を前記作動部の処置具導出部からの最大突出長さとする構成としたことを特徴とする内視鏡用処置具。An operating portion is provided at the distal end, and a contact coil extends from the operating portion over a predetermined length, and is inserted through a cylindrical member that is detachably attached to the treatment instrument insertion path of the endoscope. treatment instrument odor Te, the formed female thread substantially coincides with the coil pitch of the contact coil, the detection member adjustable in position so screwed in the axial direction provided in the tightly wound coil and said in the tubular member An endoscope having a configuration in which a stopper portion that contacts the detection member is provided, and a position at which the detection member contacts the stopper portion is set to a maximum projecting length from the treatment instrument lead-out portion of the operating portion . Treatment tool. 前記処置具挿通路における処置具導入部には前記筒状部材としてのガイド筒を着脱可能に装着し、このガイド筒に前記ストッパ部を設け、また前記検出部材の先端がガイド筒に臨む位置が前記作動部の前記導出部に臨む位置に対応するように、検出部材またはガイド筒の軸線方向の長さを設定する構成としたことを特徴とする請求項1記載の内視鏡用処置具。The treatment instrument introduction portion in the treatment instrument insertion passage and detachably attached to the guide tube as the cylindrical member, the stopper portion provided on the guide tube, also the position of the tip of the detecting member faces the guide cylinder The endoscope treatment tool according to claim 1, wherein the length of the detection member or the guide tube in the axial direction is set so as to correspond to the position of the operating portion facing the lead-out portion. 前記処置具挿通路における処置具導入部には前記筒状部材としてのガイド筒を着脱可能に装着し、このガイド筒に前記ストッパ部を設け、また前記検出部材の先端がガイド筒内に入り込んだ位置が前記作動部の前記導出部に臨む位置に対応するようになし、前記検出部材にはこの位置を表示する表示部を設ける構成としたことを特徴とする請求項1記載の内視鏡用処置具。A guide tube as the cylindrical member is detachably attached to the treatment instrument introduction portion in the treatment instrument insertion path, the stopper is provided on the guide cylinder, and the tip of the detection member enters the guide cylinder. The endoscope according to claim 1, wherein the position corresponds to a position facing the derivation unit of the operating unit, and the detection member is provided with a display unit that displays the position. Treatment tool.
JP09955896A 1996-03-29 1996-03-29 Endoscopic treatment tool Expired - Fee Related JP3796805B2 (en)

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US7828720B2 (en) * 2005-04-20 2010-11-09 Nico Corporation Surgical adapter
JP4692166B2 (en) * 2005-09-05 2011-06-01 富士フイルム株式会社 High frequency treatment tool
WO2007055032A1 (en) * 2005-11-14 2007-05-18 Olympus Medical Systems Corp. Method of endoscopical diagnosis or treatment and medical device
JP4398479B2 (en) 2007-03-02 2010-01-13 オリンパスメディカルシステムズ株式会社 Endoscope device
JP5717991B2 (en) * 2010-07-09 2015-05-13 株式会社トップ Endoscope device
JP5587703B2 (en) * 2010-08-26 2014-09-10 富士フイルム株式会社 Endoscope system
JP5331943B2 (en) * 2013-04-01 2013-10-30 オリンパスメディカルシステムズ株式会社 Medical device
JP6392095B2 (en) * 2014-11-20 2018-09-19 株式会社トップ Endoscopic device insertion prevention tool

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