JPH10165361A - Treatment appliance for endoscope - Google Patents
Treatment appliance for endoscopeInfo
- Publication number
- JPH10165361A JPH10165361A JP9022268A JP2226897A JPH10165361A JP H10165361 A JPH10165361 A JP H10165361A JP 9022268 A JP9022268 A JP 9022268A JP 2226897 A JP2226897 A JP 2226897A JP H10165361 A JPH10165361 A JP H10165361A
- Authority
- JP
- Japan
- Prior art keywords
- endoscope
- coil pipe
- treatment tool
- flexible
- treatment
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Surgical Instruments (AREA)
- Endoscopes (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、内視鏡の処置具
挿通チャンネルに進退自在に挿通される可撓性シースが
コイルパイプで形成されている内視鏡用処置具に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a treatment tool for an endoscope in which a flexible sheath inserted through a treatment tool insertion channel of the endoscope so as to be able to advance and retreat is formed by a coil pipe.
【０００２】[0002]
【従来の技術】内視鏡用処置具は一般に、ステンレス鋼
細線を密着巻きしたコイルパイプ等により可撓性シース
を形成して、その先端に処置片を取り付けた構造をとっ
ている。2. Description of the Related Art In general, a treatment instrument for an endoscope has a structure in which a flexible sheath is formed by a coil pipe or the like tightly wound with a stainless steel thin wire, and a treatment piece is attached to the distal end thereof.
【０００３】[0003]
【発明が解決しようとする課題】そのような従来の処置
具で患部を狙撃すると、図１１に示されるように、処置
具の可撓性シース９１の先端部分が内視鏡９２の処置具
挿通チャンネル９３から患部に対して真っ直ぐに突き出
される。したがって、内視鏡９２の正面に位置させるこ
とのできない患部Ａ等に対しては、正確な処置を行うこ
とができない。When aiming the affected part with such a conventional treatment tool, the distal end portion of the flexible sheath 91 of the treatment tool is inserted into the endoscope 92 as shown in FIG. It projects straight from the channel 93 to the affected part. Therefore, accurate treatment cannot be performed on the affected part A or the like that cannot be positioned in front of the endoscope 92.
【０００４】そこで、処置具の先端を患部付近に押しつ
けた状態で、シース９１を処置具挿通チャンネル９３か
らさらに突き出せば、シース９１がたわんで先端の向き
が変わるが、ステンレス製のコイルパイプ等は弾発性が
強いので、たわんだ部分が跳ねて処置具の先端が患部Ａ
部分から外れ、結局元の真っ直ぐの状態に戻ってしま
う。Therefore, if the sheath 91 is further protruded from the treatment instrument insertion channel 93 with the distal end of the treatment instrument pressed against the affected part, the sheath 91 bends and the direction of the tip is changed. Since the elasticity is strong, the bent portion jumps and the tip of the treatment tool is
It comes off the part and eventually returns to its original straight state.
【０００５】そこで、シース９１の先端部分を遠隔操作
によって任意に屈曲させることができるようにしたもの
もある（実公昭５２−２２１４６号、実開平１−１１９
６２１号等）。In view of this, there is a device in which the distal end portion of the sheath 91 can be arbitrarily bent by remote control (Japanese Utility Model Publication No. 52-22146, Japanese Utility Model Application Laid-Open No. 1-119).
No. 621).
【０００６】しかし、そのような内視鏡用処置具では、
処置具の操作部で処置操作と屈曲操作とを行う必要があ
るので非常に操作性が悪く、先端を患部に正面から当接
させるのが容易でないばかりか、非常に細いシース内に
処置操作用の操作ワイヤと屈曲操作用の操作ワイヤとが
並挿されるので、シースが硬くなって処置具挿通チャン
ネルへの挿通性が悪くなってしまう。[0006] However, in such an endoscope treatment tool,
Since it is necessary to perform the treatment operation and the bending operation with the operation part of the treatment tool, the operability is very poor, and it is not easy to bring the tip into contact with the affected part from the front, and the treatment operation is performed in a very thin sheath. The operation wire and the operation wire for the bending operation are inserted side by side, so that the sheath is hardened and the insertion property to the treatment instrument insertion channel is deteriorated.
【０００７】そこで本発明は、操作性及び挿通性がよ
く、しかも簡単な構造で容易に患部を正面から狙撃する
ことができる内視鏡用処置具を提供することを目的とす
る。SUMMARY OF THE INVENTION It is an object of the present invention to provide a treatment tool for an endoscope which has good operability and penetrability and can easily aim at an affected part from the front with a simple structure.
【０００８】[0008]
【課題を解決するための手段】上記の目的を達成するた
め、本発明の内視鏡用処置具は、内視鏡の処置具挿通チ
ャンネル内に進退自在に挿通される可撓性シースが、金
属細線を巻いたコイルパイプによって形成された内視鏡
用処置具において、上記コイルパイプの先端部分が、外
表面部分が研削され且つコイル巻き時に加えられたプレ
ロードが除去されて、上記コイルパイプの他の部分より
も柔軟で任意方向に屈曲自在な屈曲自在部に形成されて
いることを特徴とする。Means for Solving the Problems To achieve the above object, a treatment instrument for an endoscope according to the present invention comprises a flexible sheath which is inserted into a treatment instrument insertion channel of the endoscope so as to be able to advance and retreat. In a treatment tool for an endoscope formed by a coil pipe wound with a thin metal wire, a distal end portion of the coil pipe has an outer surface portion ground and a preload applied at the time of coil winding is removed. It is characterized by being formed in a bendable portion which is more flexible than other portions and can be bent in any direction.
【０００９】また、本発明の内視鏡用処置具は、内視鏡
の処置具挿通チャンネル内に進退自在に挿通される可撓
性シースが、金属細線を巻いたコイルパイプによって形
成された内視鏡用処置具において、上記コイルパイプの
先端部分の５〜３０ｍｍの範囲が、外表面部分が研削さ
れて、上記コイルパイプの他の部分よりも柔軟で任意方
向に屈曲自在な屈曲自在部に形成されていることを特徴
とする。Further, in the treatment tool for an endoscope of the present invention, the flexible sheath inserted in the treatment tool insertion channel of the endoscope so as to be able to advance and retreat is formed by a coil pipe wound with a thin metal wire. In the treatment instrument for an endoscope, a range of 5 to 30 mm of the distal end portion of the coil pipe is formed into a bendable portion which has an outer surface portion ground and is more flexible than other portions of the coil pipe and can be bent in any direction. It is characterized by being formed.
【００１０】また、本発明の内視鏡用処置具は、内視鏡
の処置具挿通チャンネル内に進退自在に挿通される可撓
性シースが、金属細線を巻いたコイルパイプによって形
成された内視鏡用処置具において、上記コイルパイプの
先端部分が、他の部分よりも素線径の細い金属細線で形
成されて、上記コイルパイプの他の部分よりも柔軟で任
意方向に屈曲自在な屈曲自在部に形成されていることを
特徴とする。In the treatment instrument for an endoscope according to the present invention, the flexible sheath inserted into the treatment instrument insertion channel of the endoscope so as to be able to advance and retreat is formed by a coil pipe formed by winding a thin metal wire. In the treatment instrument for an endoscope, the distal end portion of the coil pipe is formed of a thin metal wire having a smaller element wire diameter than the other portions, and is more flexible than the other portions of the coil pipe and bendable in any direction. It is characterized in that it is formed in a free part.
【００１１】また、本発明の内視鏡用処置具は、内視鏡
の処置具挿通チャンネル内に進退自在に挿通される可撓
性シースが、金属細線を巻いたコイルパイプによって形
成された内視鏡用処置具において、上記コイルパイプの
先端部分が、他の部分よりも素線径の細い金属細線で形
成され且つコイル巻き時に加えられたプレロードが除去
されて、上記コイルパイプの他の部分よりも柔軟で任意
方向に屈曲自在な屈曲自在部に形成されていることを特
徴とする。Further, in the treatment tool for an endoscope of the present invention, the flexible sheath inserted through the treatment tool insertion channel of the endoscope so as to be able to advance and retreat is formed by a coil pipe formed by winding a thin metal wire. In the treatment instrument for an endoscope, a tip portion of the coil pipe is formed of a thin metal wire having a smaller element wire diameter than other portions, and a preload applied at the time of coil winding is removed, and another portion of the coil pipe is removed. It is characterized by being formed in a bendable portion that is more flexible and bendable in any direction.
【００１２】なお、上記屈曲自在部の長さが５〜３０ｍ
ｍの範囲にあるとよく、上記屈曲自在部が上記コイルパ
イプの他の部分に比べて２倍以上の柔軟性を有している
とよい。The length of the bendable portion is 5 to 30 m.
m, and the bendable portion preferably has twice or more flexibility as compared with other portions of the coil pipe.
【００１３】また、上記屈曲自在部においては上記コイ
ルパイプが隙間をあけて巻かれていて、その他の部分で
は上記コイルパイプが密着巻きされていてもよい。Further, the coil pipe may be wound with a gap in the bendable portion, and the coil pipe may be wound closely in other portions.
【００１４】[0014]
【発明の実施の形態】図面を参照して本発明の実施の形
態を説明する。図２は、内視鏡用処置具の一つである内
視鏡用生検鉗子を示している。ただし、本発明を生検鉗
子以外の内視鏡用処置具に適用してもよい。Embodiments of the present invention will be described with reference to the drawings. FIG. 2 shows an endoscope biopsy forceps, which is one of the endoscope treatment tools. However, the present invention may be applied to endoscope treatment tools other than biopsy forceps.
【００１５】内視鏡の処置具挿通チャンネルに挿脱自在
に通される可撓性シース１は、例えばステンレス鋼細線
を一定の直径でパイプ状に巻いたコイルパイプによって
形成されている。The flexible sheath 1 which is removably inserted into the treatment instrument insertion channel of the endoscope is formed of, for example, a coil pipe formed by winding a stainless steel thin wire into a pipe with a constant diameter.
【００１６】可撓性シース１の基端に連結された操作部
２には、シース１内に進退自在に全長にわたって挿通さ
れた操作ワイヤ３を進退操作するためのスライダ４が、
摺動自在に配置されている。An operating portion 2 connected to the proximal end of the flexible sheath 1 has a slider 4 for operating the operating wire 3 which is inserted into the sheath 1 so as to be able to advance and retreat freely over its entire length.
It is slidably arranged.
【００１７】シース１の先端には、先端処置片である一
対の組織採取カップ５，５が軸６を中心にして開閉自在
に取り付けられており、操作部２側でスライダ４を摺動
操作して操作ワイヤ３を進退させれば、組織採取カップ
５，５が軸６を中心にして扇状に開閉動作する。At the distal end of the sheath 1, a pair of tissue collecting cups 5 and 5 as distal treatment pieces are attached so as to be openable and closable about a shaft 6, and the slider 4 is slidably operated on the operation unit 2 side. When the operation wire 3 is advanced and retracted, the tissue collection cups 5 and 5 open and close in a fan shape about the shaft 6.
【００１８】図１は、その生検鉗子の先端部分付近を示
しており、一対の組織採取カップ５，５は、各々軸線方
向にやや細長い半球状に形成されており、一対の組織採
取カップ５，５を合わせると、先端表面が一つの球面を
なしている。そして、各組織採取カップ５，５のあい対
向する開口部の稜線部分には、刃が形成されている。FIG. 1 shows the vicinity of the distal end portion of the biopsy forceps. A pair of tissue sampling cups 5 and 5 are each formed in a hemispherical shape slightly elongated in the axial direction. , 5 together, the tip surface forms one spherical surface. A blade is formed at a ridgeline portion of the opening facing each other between the tissue collection cups 5 and 5.
【００１９】軸６は、シース１の先端に連結固着された
先端本体８の先端近傍に取り付けられており、先端本体
８の後半部（図１において右側の部分）は円筒状に形成
され、前半部は中央をスリットで切り分けられた平行腕
状に形成されている。The shaft 6 is mounted near the distal end of a distal end body 8 connected and fixed to the distal end of the sheath 1. The rear half (the right side in FIG. 1) of the distal end body 8 is formed in a cylindrical shape, The part is formed in the shape of a parallel arm whose center is cut by a slit.
【００２０】各組織採取カップ５，５には、軸６との係
合位置より後方に伸びるアーム９，９が一体に形成され
ており、先端本体８のスリット部内に配置されたパンタ
グラフ状のリンク機構１０に、各アーム９，９が連結さ
れている。Each of the tissue collection cups 5 and 5 is integrally formed with arms 9 and 9 extending rearward from an engagement position with the shaft 6, and has a pantograph-shaped link disposed in a slit portion of the distal end main body 8. Each arm 9 is connected to the mechanism 10.
【００２１】そして、操作ワイヤ３の先端がリンク機構
１０の後端部に連結固着されていて、操作部２側から操
作ワイヤ３を押し込み操作することにより、リンク機構
１０が作動して、図３に示されるように、組織採取カッ
プ５，５が軸６を中心にして扇状に開く。The distal end of the operation wire 3 is connected and fixed to the rear end of the link mechanism 10, and when the operation wire 3 is pushed in from the operation section 2 side, the link mechanism 10 is operated, and FIG. , The tissue collection cups 5, 5 open fan-shaped about the axis 6.
【００２２】その状態において、操作部２側から操作ワ
イヤ３を牽引操作すれば、組織採取カップ５，５が閉じ
て、患部Ａの生検組織などを組織採取カップ５，５内に
採取することができる。In this state, when the operation wire 3 is pulled from the operation section 2 side, the tissue collection cups 5 and 5 are closed, and the biopsy tissue or the like of the diseased part A is collected in the tissue collection cups 5 and 5. Can be.
【００２３】一対の組織採取カップ５，５の各先端部分
の表面には、図４に拡大図示されるように、前方に向い
た尖端を有する突部１１，１１が組織採取カップ５，５
の外径より内側の位置に突設されている。As shown in an enlarged view in FIG. 4, projections 11, 11 having forward-pointed tips are provided on the surfaces of the tip portions of the pair of tissue collection cups 5, 5, respectively.
Is protruded at a position inside the outer diameter.
【００２４】図５は組織採取カップ５，５の正面図であ
り、突部１１，１１は、前方から見て組織採取カップ
５，５の半分程度の直径の環状に形成されている。そし
て、図４に示されるように、突部１１，１１の尖端は、
組織採取カップ５，５の先端から前方に突出しないよう
に、組織採取カップ５，５の先端位置とほぼ同一面に位
置している。FIG. 5 is a front view of the tissue collection cups 5, 5, and the projections 11, 11 are formed in an annular shape having a diameter of about half of the tissue collection cups 5, 5 when viewed from the front. Then, as shown in FIG.
In order not to protrude forward from the distal ends of the tissue collection cups 5, 5, they are located on substantially the same plane as the distal end positions of the tissue collection cups 5, 5.
【００２５】図１に示されるように、可撓性シース１の
先端部分１ａは、可撓性シース１の外表面部分が研削さ
れて素線の断面積が小さくされ、弱い力で曲げることが
できるようになっている。As shown in FIG. 1, the distal end portion 1a of the flexible sheath 1 can be bent with a small force by grinding the outer surface portion of the flexible sheath 1 to reduce the cross-sectional area of the wire. I can do it.
【００２６】また、可撓性シース１には、腰を強くする
ために隣り合う素線を密着させる方向の荷重（いわゆる
プレロード）がコイル巻き時に加えられているが、その
プレロードが除去されて曲がり易くなっている。A load (so-called preload) is applied to the flexible sheath 1 at the time of winding the coil in the direction of bringing adjacent wires into close contact with each other in order to strengthen the waist, but the preload is removed to bend. It's easier.
【００２７】その結果、可撓性シース１の先端部分１ａ
は、他の部分の２倍以上の柔軟性を有して、任意方向に
屈曲自在な屈曲自在部１ａになっている。屈曲を遠隔操
作するための操作ワイヤは設けられていない。As a result, the distal end portion 1a of the flexible sheath 1
Is a bendable portion 1a which is twice as flexible as the other portions and is bendable in any direction. No operation wire is provided for remotely controlling the bending.
【００２８】２倍以上の柔軟性とは、軸線方向と直角方
向に力を加えて同じだけ撓ませるのに、２分の１以下の
力しか必要としないことをいう。なお、プレロードを除
去しなくてもその程度の柔軟性が得られる場合には、プ
レロードを除去しなくてもよい。More than twice the flexibility means that less than half the force is required to apply the force in the direction perpendicular to the axial direction and to deflect the same amount. Note that if the degree of flexibility can be obtained without removing the preload, the preload need not be removed.
【００２９】シース１の全体の長さは例えば１〜２ｍで
あり、屈曲自在部１ａの長さは後述するように例えば５
〜３０ｍｍ程度である。屈曲自在部１ａ以外の部分の可
撓性シース１は研削されておらず、コイル巻き時に１０
０〜１５０ｇ程度のプレロードがかけられたままの状態
になっている。The overall length of the sheath 1 is, for example, 1 to 2 m, and the length of the bendable portion 1a is, for example, 5 m, as described later.
It is about 30 mm. The portion of the flexible sheath 1 other than the bendable portion 1a is not ground, and is not ground when the coil is wound.
The preload of about 0 to 150 g is still applied.
【００３０】また、この実施の形態の屈曲自在部１ａに
おいては、コイルを軸線方向に引き伸ばして、隣り合う
素線と素線との間に隙間をあけてある。ただし、必ずし
も隙間をあけなくてもよい。屈曲自在部１ａ以外の部分
の可撓性シース１は、密着巻きされたままの状態になっ
ている。In the bendable portion 1a of this embodiment, the coil is stretched in the axial direction so that a gap is provided between adjacent strands. However, it is not always necessary to leave a gap. The portions of the flexible sheath 1 other than the bendable portion 1a remain tightly wound.
【００３１】このように構成された実施の形態の内視鏡
用処置具を使用するときは、処置具の先端部分を内視鏡
の処置具挿通チャンネルから突き出して、組織採取カッ
プ５，５を患部のある部分に押しつける。When using the endoscope treatment tool of the embodiment configured as described above, the distal end portion of the treatment tool is protruded from the treatment tool insertion channel of the endoscope, and the tissue collection cups 5, 5 are removed. Press against the affected area.
【００３２】図３に示されるように、患部Ａに対して斜
め方向からしか狙撃できない場合でも、突部１１が体腔
内粘膜に食い込んで組織採取カップ５，５の位置を固定
することができる。As shown in FIG. 3, even when the target A can be aimed only at an oblique direction, the protrusion 11 can bite into the mucous membrane in the body cavity and fix the positions of the tissue collection cups 5, 5.
【００３３】そのような状態から、シース１をさらに押
し出すと、図６に示されるように、患部Ａ近くに押しつ
けられた組織採取カップ５，５の軸６を支点として、屈
曲自在部１ａが自然な状態でスムーズに屈曲して内視鏡
２０の処置具挿通チャンネル２１の出口２２を支点とし
て膨れ上がり、組織採取カップ５，５が患部Ａに対して
正面に近い方向から当接する状態になる。この時に、患
部Ａが先端本体８の軸線方向に押される力をＰとする。When the sheath 1 is further extruded from such a state, as shown in FIG. 6, the bendable portion 1a is spontaneously supported by the shaft 6 of the tissue collection cups 5, 5 pressed close to the affected part A. The endoscope 20 is bent smoothly and swells with the outlet 22 of the treatment instrument insertion channel 21 of the endoscope 20 as a fulcrum, and the tissue collection cups 5 and 5 come into contact with the diseased part A from a direction close to the front. At this time, P is the force with which the affected part A is pushed in the axial direction of the distal end main body 8.
【００３４】屈曲自在部１ａは、柔軟性が高く、自然状
態で真っ直ぐになろうとする直線復元性がある。したが
って、図６に示されるように屈曲自在部１ａが屈曲した
状態では、組織採取カップ５，５部分に軸線方向と直角
方向の力Ｑが作用する。The bendable portion 1a has a high flexibility and has a straight line restoring property to be straightened in a natural state. Therefore, when the bendable portion 1a is bent as shown in FIG. 6, a force Q in a direction perpendicular to the axial direction acts on the tissue sampling cups 5,5.
【００３５】その結果、患部Ａには、ＰとＱの合成力Ｆ
が作用して組織採取カップ５，５が患部Ａに対して強く
押しつけられ、処置具が生検鉗子の場合には患部Ａの生
検組織を正確に採取することができ、内視鏡用処置具が
生検鉗子以外の種類の場合でも、患部Ａに対して正確に
処置を行うことができる。As a result, the combined force F of P and Q is applied to the affected area A.
Acts, the tissue collection cups 5, 5 are strongly pressed against the affected area A, and when the treatment tool is a biopsy forceps, the biopsy tissue of the affected area A can be accurately sampled. Even when the tool is of a type other than the biopsy forceps, the treatment can be accurately performed on the affected part A.
【００３６】このように作用する屈曲自在部１ａの長さ
は、消化管内視鏡用処置具の場合には３０ｍｍ程度以下
が好ましい。あまり長いと、狭い体腔内で適当な大きさ
に曲がらなくて具合が悪い。ミニマムとして５ｍｍ程度
の長さは必要である。The length of the bendable portion 1a acting as described above is preferably about 30 mm or less in the case of a gastrointestinal endoscopic treatment instrument. If it is too long, it will not bend to an appropriate size in a narrow body cavity, and it will be uncomfortable. A length of about 5 mm is required as a minimum.
【００３７】図７は本発明の内視鏡用処置具の第２の実
施の形態を示しており、屈曲自在部１ａを、可撓性シー
ス１の他の部分よりも素線径の細いコイルパイプで形成
したものである。FIG. 7 shows a second embodiment of the treatment tool for an endoscope according to the present invention, in which a bendable portion 1a is formed by a coil having a smaller element wire diameter than other portions of the flexible sheath 1. It is formed with a pipe.
【００３８】そのような屈曲自在部１ａを可撓性シース
１の先端部分に継ぎ目なく形成するには、例えば図８に
示されるように、コイルパイプを形成する素線となるス
テンレス鋼線１ｃの径を途中で変えればよい。屈曲自在
部１ａ部分のプレロードは除去するのがよい。In order to form such a bendable portion 1a seamlessly at the distal end portion of the flexible sheath 1, for example, as shown in FIG. 8, a stainless steel wire 1c serving as a wire forming a coil pipe is used. The diameter may be changed halfway. It is preferable to remove the preload of the bendable portion 1a.
【００３９】ただし、プレロードを除去しなくても可撓
性シース１の他の部分の２倍以上の柔軟性が得られる場
合には、プレロードを除去しなくてもよい。However, if the flexibility of the other portion of the flexible sheath 1 can be obtained twice or more without removing the preload, the preload need not be removed.
【００４０】その結果、屈曲自在部１ａは第１の実施の
形態と同様の柔軟性と直線復元性を有することができ、
第１の実施の形態の場合と同様に作用する。なお、この
実施の形態においては屈曲自在部１ａは密着巻きになっ
ているが、第１の実施の形態と同様にコイルパイプの隣
り合う素線間に隙間をあけてもよい。As a result, the bendable portion 1a can have the same flexibility and straight line restorability as in the first embodiment.
It works in the same way as in the first embodiment. In this embodiment, the bendable portion 1a is tightly wound, but a gap may be provided between adjacent strands of the coil pipe as in the first embodiment.
【００４１】なお、本発明は上記実施の形態に限定され
るものではなく、例えば組織を採取する部分の腫瘍が硬
い場合や、組織採取カップ５が滑り易い使用環境等の場
合には、突部１１を組織採取カップ５から前方に突出さ
せた形状のものを用いることにより、組織採取カップ５
を患部に対して確実に固定することができる。The present invention is not limited to the above embodiment. For example, when the tumor at the portion where the tissue is to be collected is hard, or when the tissue collection cup 5 is in a slippery use environment, the protrusion may be used. 11 is used to protrude forward from the tissue collection cup 5 so that the tissue collection cup 5
Can be securely fixed to the affected part.
【００４２】また、組織採取カップ５の外面に設けられ
た突部１１を図９に示されるように角状に形成してもよ
く、図１０に示されるように一つの組織採取カップ５に
角状突部１１を複数設けてもよい。Further, the protrusion 11 provided on the outer surface of the tissue collection cup 5 may be formed in a square shape as shown in FIG. 9, and as shown in FIG. A plurality of protrusions 11 may be provided.
【００４３】[0043]
【発明の効果】本発明によれば、可撓性シースを形成す
るコイルパイプの先端部分の外表面部分を研削し且つコ
イル巻き時に加えられたプレロードを除去することによ
り、或いは可撓性シースの他の部分よりも素線径の細い
金属細線を巻いて且つプレロードを除去することによ
り、シースの先端部分に他の部分よりも柔軟で任意方向
に屈曲自在な屈曲自在部に形成したので、処置具の先端
部分を内視鏡の処置具挿通チャンネルから突き出して患
部のある部分に押しつけておき、可撓軸をさらに押し出
すと、患部に押しつけられた先端部分を支点として屈曲
自在部が自然な状態でスムーズに屈曲して先端部分の向
きが変わり、患部に対して正面から当接させることがで
きる。According to the present invention, the outer surface of the distal end portion of the coil pipe forming the flexible sheath is ground and the preload applied when the coil is wound is removed, or the flexible sheath is formed. By winding a thin metal wire having a smaller element wire diameter than the other portions and removing the preload, the sheath is formed at the distal end portion as a bendable portion that is more flexible than the other portion and can be bent in any direction. When the distal end of the tool protrudes from the treatment tool insertion channel of the endoscope and is pressed against the affected part, and the flexible shaft is further pushed out, the bendable part is in a natural state with the distal end pressed against the affected part as a fulcrum. To bend smoothly and change the direction of the distal end portion so that it can be brought into contact with the affected part from the front.
【００４４】したがって、操作性がよくて簡単な構造で
患部を容易に正面から狙撃することができ、湾曲操作ワ
イヤ等を必要としないので、処置具挿通チャンネルに対
する挿入性もよい。Therefore, the affected part can be easily aimed at the affected part from the front with a simple structure having good operability, and a bending operation wire or the like is not required.
【図１】本発明の第１の実施の形態の内視鏡用処置具の
先端部分の側面断面図である。FIG. 1 is a side sectional view of a distal end portion of an endoscope treatment tool according to a first embodiment of the present invention.
【図２】本発明の第１の実施の形態の内視鏡用処置具の
全体側面図である。FIG. 2 is an overall side view of the treatment tool for an endoscope according to the first embodiment of the present invention.
【図３】本発明の第１の実施の形態の内視鏡用処置具の
使用状態の先端部分の側面図である。FIG. 3 is a side view of a distal end portion of the treatment tool for an endoscope according to the first embodiment of the present invention in a used state.
【図４】本発明の第１の実施の形態の内視鏡用処置具の
先端部分の部分拡大側面断面図である。FIG. 4 is a partially enlarged side sectional view of a distal end portion of the endoscope treatment tool according to the first embodiment of the present invention.
【図５】本発明の第１の実施の形態の内視鏡用処置具の
先端部分の拡大正面図である。FIG. 5 is an enlarged front view of a distal end portion of the treatment tool for an endoscope according to the first embodiment of the present invention.
【図６】本発明の第１の実施の形態の内視鏡用処置具の
使用状態の先端部分の側面図である。FIG. 6 is a side view of a distal end portion of the endoscope treatment tool according to the first embodiment of the present invention in a used state.
【図７】本発明の第２の実施の形態の内視鏡用処置具の
先端部分の側面図である。FIG. 7 is a side view of a distal end portion of an endoscope treatment tool according to a second embodiment of the present invention.
【図８】本発明の第２の実施の形態の内視鏡用処置具の
シースを形成する素線の部分側面図である。FIG. 8 is a partial side view of a strand forming a sheath of the endoscope treatment tool according to the second embodiment of the present invention.
【図９】本発明の実施の形態における組織採取カップの
変形例の部分拡大斜視図である。FIG. 9 is a partially enlarged perspective view of a modification of the tissue sampling cup according to the embodiment of the present invention.
【図１０】本発明の実施の形態における組織採取カップ
の変形例の部分拡大斜視図である。FIG. 10 is a partially enlarged perspective view of a modification of the tissue sampling cup according to the embodiment of the present invention.
【図１１】従来の内視鏡用処置具の使用状態の先端部分
の側面図である。FIG. 11 is a side view of a distal end portion of a conventional endoscope treatment tool in a used state.
１ 可撓性シース １ａ 屈曲自在部 ２１ 処置具挿通チャンネル DESCRIPTION OF SYMBOLS 1 Flexible sheath 1a Flexible part 21 Treatment tool insertion channel
Claims (7)
在に挿通される可撓性シースが、金属細線を巻いたコイ
ルパイプによって形成された内視鏡用処置具において、 上記コイルパイプの先端部分が、外表面部分が研削され
且つコイル巻き時に加えられたプレロードが除去され
て、上記コイルパイプの他の部分よりも柔軟で任意方向
に屈曲自在な屈曲自在部に形成されていることを特徴と
する内視鏡用処置具。1. A treatment instrument for an endoscope, wherein a flexible sheath inserted into a treatment instrument insertion channel of an endoscope so as to be able to advance and retreat is formed by a coil pipe wound with a thin metal wire. The tip portion is formed into a bendable portion that is more flexible and can bend in any direction than the other portions of the coil pipe, with the outer surface portion ground and the preload applied during coil winding removed. An endoscope treatment tool characterized by the following.
在に挿通される可撓性シースが、金属細線を巻いたコイ
ルパイプによって形成された内視鏡用処置具において、 上記コイルパイプの先端部分の５〜３０ｍｍの範囲が、
外表面部分が研削されて、上記コイルパイプの他の部分
よりも柔軟で任意方向に屈曲自在な屈曲自在部に形成さ
れていることを特徴とする内視鏡用処置具。2. A treatment instrument for an endoscope, wherein a flexible sheath inserted into a treatment instrument insertion channel of the endoscope so as to be able to advance and retreat is formed by a coil pipe wound with a thin metal wire. The range of 5 to 30 mm at the tip is
An endoscope treatment tool, wherein an outer surface portion is ground to form a bendable portion that is more flexible and bendable in an arbitrary direction than other portions of the coil pipe.
在に挿通される可撓性シースが、金属細線を巻いたコイ
ルパイプによって形成された内視鏡用処置具において、 上記コイルパイプの先端部分が、他の部分よりも素線径
の細い金属細線で形成されて、上記コイルパイプの他の
部分よりも柔軟で任意方向に屈曲自在な屈曲自在部に形
成されていることを特徴とする内視鏡用処置具。3. A treatment tool for an endoscope, wherein a flexible sheath inserted into a treatment tool insertion channel of the endoscope so as to be able to advance and retreat is formed by a coil pipe wound with a thin metal wire. The distal end portion is formed of a thin metal wire having a smaller element wire diameter than the other portion, and is formed as a bendable portion that is more flexible and can be bent in any direction than the other portion of the coil pipe. Endoscope treatment tool.
在に挿通される可撓性シースが、金属細線を巻いたコイ
ルパイプによって形成された内視鏡用処置具において、 上記コイルパイプの先端部分が、他の部分よりも素線径
の細い金属細線で形成され且つコイル巻き時に加えられ
たプレロードが除去されて、上記コイルパイプの他の部
分よりも柔軟で任意方向に屈曲自在な屈曲自在部に形成
されていることを特徴とする内視鏡用処置具。4. A treatment tool for an endoscope, wherein a flexible sheath inserted into a treatment tool insertion channel of the endoscope so as to be able to advance and retreat is formed by a coil pipe wound with a thin metal wire. The distal end portion is formed of a thin metal wire having a smaller element wire diameter than the other portions, and the preload applied at the time of coil winding is removed, so that the bending is more flexible than the other portions of the coil pipe and can be freely bent in any direction. An endoscope treatment tool formed on a free part.
囲にある請求項１、３又は４記載の内視鏡用処置具。5. The endoscope treatment tool according to claim 1, wherein the length of the bendable portion is in the range of 5 to 30 mm.
部分に比べて２倍以上の柔軟性を有している請求項１、
２、３、４又は５記載の内視鏡用処置具。6. The flexible part according to claim 1, wherein said flexible part has twice or more flexibility as compared with other parts of said coil pipe.
6. The treatment tool for an endoscope according to 2, 3, 4 or 5.
プが隙間をあけて巻かれていて、その他の部分では上記
コイルパイプが密着巻きされている請求項１、２、３、
４、５又は６記載の内視鏡用処置具。7. The coil pipe is wound with a gap in the bendable portion, and the coil pipe is wound tightly in other portions.
7. The treatment tool for an endoscope according to 4, 5, or 6.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP02226897A JP3732911B2 (en) | 1996-10-08 | 1997-02-05 | Endoscopic treatment tool |
| US08/832,817 US5904647A (en) | 1996-10-08 | 1997-04-04 | Treatment accessories for an endoscope |
| DK97106748T DK0835637T3 (en) | 1996-10-08 | 1997-04-23 | Endoscope treatment accessories |
| EP97106748A EP0835637B1 (en) | 1996-10-08 | 1997-04-23 | Treatment accessories for an endoscope |
| DE69723193T DE69723193T2 (en) | 1996-10-08 | 1997-04-23 | Treatment accessories for an endoscope |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8-267186 | 1996-10-08 | ||
| JP26718696 | 1996-10-08 | ||
| JP02226897A JP3732911B2 (en) | 1996-10-08 | 1997-02-05 | Endoscopic treatment tool |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH10165361A true JPH10165361A (en) | 1998-06-23 |
| JP3732911B2 JP3732911B2 (en) | 2006-01-11 |
Family
ID=26359444
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP02226897A Expired - Fee Related JP3732911B2 (en) | 1996-10-08 | 1997-02-05 | Endoscopic treatment tool |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3732911B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004190167A (en) * | 2002-12-11 | 2004-07-08 | Asahi Intecc Co Ltd | Hollow twisted wire coil, tool for medical application obtained by using the same, and method for producing the same |
| JP2009240761A (en) * | 2008-03-28 | 2009-10-22 | Olympus Medical Systems Corp | Endoscope treatment instrument |
| US8814890B2 (en) | 2004-04-06 | 2014-08-26 | Asahi Intecc Co., Ltd. | Vascular catheter |
| WO2020036085A1 (en) * | 2018-08-14 | 2020-02-20 | 日本発條株式会社 | Bending structure and joint function part |
-
1997
- 1997-02-05 JP JP02226897A patent/JP3732911B2/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004190167A (en) * | 2002-12-11 | 2004-07-08 | Asahi Intecc Co Ltd | Hollow twisted wire coil, tool for medical application obtained by using the same, and method for producing the same |
| US7117703B2 (en) | 2002-12-11 | 2006-10-10 | Asahi Intecc Co., Ltd. | Wire-stranded hollow coil body, a medical equipment made therefrom and a method of making the same |
| CN100399976C (en) * | 2002-12-11 | 2008-07-09 | 朝日印帝克股份有限公司 | One steel wire stranded hollow coil, one medical apparatus produced with the same, and producing method thereof |
| US8814890B2 (en) | 2004-04-06 | 2014-08-26 | Asahi Intecc Co., Ltd. | Vascular catheter |
| JP2009240761A (en) * | 2008-03-28 | 2009-10-22 | Olympus Medical Systems Corp | Endoscope treatment instrument |
| US8728089B2 (en) | 2008-03-28 | 2014-05-20 | Olympus Medical Systems Corp. | Endoscope treatment instrument |
| WO2020036085A1 (en) * | 2018-08-14 | 2020-02-20 | 日本発條株式会社 | Bending structure and joint function part |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3732911B2 (en) | 2006-01-11 |
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