JPH05176941A - High-frequency snare - Google Patents

High-frequency snare

Info

Publication number
JPH05176941A
JPH05176941A JP3358406A JP35840691A JPH05176941A JP H05176941 A JPH05176941 A JP H05176941A JP 3358406 A JP3358406 A JP 3358406A JP 35840691 A JP35840691 A JP 35840691A JP H05176941 A JPH05176941 A JP H05176941A
Authority
JP
Japan
Prior art keywords
wire
loop
frequency snare
shape
tube
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.)
Withdrawn
Application number
JP3358406A
Other languages
Japanese (ja)
Inventor
Shigeo Hayashi
繁男 林
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Olympus Corp
Original Assignee
Olympus Optical Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Olympus Optical Co Ltd filed Critical Olympus Optical Co Ltd
Priority to JP3358406A priority Critical patent/JPH05176941A/en
Publication of JPH05176941A publication Critical patent/JPH05176941A/en
Withdrawn legal-status Critical Current

Links

Abstract

PURPOSE:To obtain the high-frequency snare which can be manufactured simply without necessitating skill of a worker, does not deform a loop shape even by a repeated opening/closing operation, and does not exert an undesirable influence on the inside of a celom. CONSTITUTION:A projecting part 7 is bent and formed in one part of a multiple stranded wire 1 of stainless steel. The stranded wire 1 is connected to an operating wire 8, and the operating wire 8 is inserted into a tube 2.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、内視鏡と共に用いる内
視鏡用処置具に関し、生体腔内に発生したポリープ等の
組織部分を外部操作によって切除する高周波スネアに関
する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an endoscopic treatment tool used with an endoscope, and more particularly to a high-frequency snare for excising a tissue portion such as a polyp generated in a living body cavity by an external operation.

【0002】[0002]

【従来の技術】従来、図3に示す如く、一般的には多重
巻きの弾性ワイヤ31を楕円形状に曲がるように癖をつ
けたスネアワイヤをチューブ32の先端から突き出した
時に元のループA状に戻るようにしてある。そのループ
Aを小径に絞ることにより、ポリープを切除するもので
ある。そのために、先のループAはその形状が楕円形
状、もしくは図4に示す六角形状に形成されたものがこ
れまで多く用いられてきた。
2. Description of the Related Art Conventionally, as shown in FIG. 3, when a snare wire, which is formed by bending a multi-winding elastic wire 31 into an elliptical shape, is protruded from a tip of a tube 32, the snare wire returns to the original loop A shape. I'm trying to return. By narrowing the loop A to a small diameter, the polyp is cut off. For this reason, the loop A described above has often been used in the form of an elliptical shape or a hexagonal shape shown in FIG.

【0003】これらのループ形状は以下のように成形さ
れていた。まず、ループが楕円形状の場合は、図5に示
すように、湾曲部を成形する際にピンセット33等でそ
のワイヤ31を両側から挟み、成形したい湾曲形状が得
られるまでピンセット33で挟んだ状態でワイヤ31の
所望部分を繰り返し図中m n方向に“しごく”作業が
行われていた。また六角形状の場合は、図6に示すよう
に、曲げ部p〜s点を治具34等で曲げ成形を行い成形
されていた。このようにポリープの形状や大きさに合わ
せて主に2種類のスネアが使い分けられていた。
These loop shapes were molded as follows. First, in the case where the loop has an elliptical shape, as shown in FIG. 5, when the curved portion is molded, the wire 31 is pinched from both sides with tweezers 33 and the like, and the wire 31 is sandwiched with the tweezers 33 until the curved shape desired to be molded is obtained. At this point, the desired portion of the wire 31 was repeatedly "squeezed" in the mn direction in the figure. Further, in the case of the hexagonal shape, as shown in FIG. 6, the bent parts p to s were bent and formed by a jig 34 or the like. Thus, two types of snares were mainly used according to the shape and size of the polyp.

【0004】[0004]

【発明が解決しようとする課題】しかしながら、前記従
来の高周波スネアワイヤは以下の問題を抱えていた。楕
円形状のループは治具による成形が難しく、ワイヤ31
に癖をつける“しごき”工程により制作する。上記方法
は、図7および図8(図7のB−B′線端面図)に示す
様に、ワイヤ31の断面を楕円形に変形させ、かつ芯線
35に対する周囲のより線36の位置が湾曲部の外側に
偏らせることにより、ワイヤ31に癖をつけさせて湾曲
させるものであるが、作業を人手(熟練)に頼るため特
定の作業者しか製作できず、また完成品の形状のばらつ
きも大きいという問題があった。
However, the above-mentioned conventional high frequency snare wire has the following problems. The elliptical loop is difficult to form with a jig, and the wire 31
It is produced by the "ironing" process that creates a habit. In the above method, as shown in FIG. 7 and FIG. 8 (end view of line BB ′ in FIG. 7), the cross section of the wire 31 is deformed into an elliptical shape, and the position of the stranded wire 36 around the core wire 35 is curved. By biasing the wire 31 toward the outside of the part, the wire 31 is bent and bent, but only a specific worker can be manufactured because the work depends on manpower (skill), and there is variation in the shape of the finished product. There was a big problem.

【0005】また、図9に示す様に、このループAを体
腔内で絞る際にループA部分を二つ折り状にしてチュー
ブ32内に引き込むので、このループAを構成するワイ
ヤ31に大きい変形を強いる結果、図10の様にワイヤ
31の芯線35に対する周囲のより線36の位置が基に
戻り、均等に配置されるため、これがワイヤ31の復帰
力低下につながり、再使用時にループAの面積が初期の
ものより小さくなってしまい、ポリープの捕捉が困難に
なる。この現象を見込んで必要以上に大きなループを成
形しなければならないという不都合もあった。
Further, as shown in FIG. 9, when the loop A is squeezed in the body cavity, the loop A portion is folded in two and drawn into the tube 32, so that the wire 31 constituting the loop A is largely deformed. As a result of the force, as shown in FIG. 10, the position of the stranded wire 36 around the core wire 35 of the wire 31 returns to the original position and the wires are evenly arranged, which leads to a decrease in the restoring force of the wire 31 and the area of the loop A at the time of reuse. Becomes smaller than the initial one, making it difficult to capture polyps. There is also the inconvenience that an unnecessarily large loop must be formed in consideration of this phenomenon.

【0006】他の従来例としてループを外側に4ヶ所曲
折して突出させたいわゆる“六角型”の内視鏡用処置具
がある。これは楕円形状のものと異なり“しごき”工程
が無く、成形し易く、また芯線35とより線36との位
置の変化が無いので繰り返しの開閉動作に対しても復帰
力の低下が生じ難い。しかしながら、ポリープを閉めた
時にポリープと内視鏡用処置具の四隅(図6におけるp
〜s点)との間に隙間が生じ、切断性が悪くなるととも
に、四隅の突出部が体腔内壁の他の部分に接触して、そ
の箇所を焼いてしまうという事故が生ずる恐れがある。
[0006] As another conventional example, there is a so-called "hexagonal" endoscopic treatment instrument in which a loop is bent outward at four places and protruded. Unlike the elliptical shape, there is no "ironing" step, the molding is easy, and since there is no change in the position of the core wire 35 and the twisted wire 36, the return force is unlikely to decrease even after repeated opening and closing operations. However, when the polyp is closed, the polyp and the four corners of the endoscopic treatment tool (p in FIG.
There is a possibility that a gap may occur between the point and the point s), the cuttability may deteriorate, and the protrusions at the four corners may contact other portions of the inner wall of the body cavity to burn the portion.

【0007】因って、本発明は前記従来技術における多
くの欠点を解決することを目的とし、作業者の熟練作業
に依らず作り易く、また繰り返しの開閉動作によっても
そのループ形状が変化せず、さらには体腔内への悪影響
も無い高周波スネアを提供することを目的とする。
[0007] Therefore, the present invention aims to solve the many drawbacks of the prior art, is easy to make regardless of the skilled work of the operator, and the loop shape does not change even by repeated opening and closing operations. Moreover, it is an object of the present invention to provide a high-frequency snare that does not have a bad influence on the body cavity.

【0008】[0008]

【課題を解決するための手段】本発明は、非導電性のチ
ューブへ進退自在に挿通され、前記チューブの先端から
突き出してループを形成するワイヤを具備した高周波ス
ネアにおいて、前記ワイヤの形状を八角形以上の多角形
に形成したものである。また、前記ループを形成する素
材の形状を平板状にしたものである。
SUMMARY OF THE INVENTION The present invention provides a high frequency snare having a wire which is inserted into a non-conductive tube so as to be able to advance and retreat, and which protrudes from the tip of the tube to form a loop. It is formed into a polygon having a polygonal shape or more. Further, the shape of the material forming the loop is flat.

【0009】[0009]

【作用】本発明では、治具を用いて曲折加工のみで簡単
に作製できるとともに、患部以外の体腔内に接触してそ
の箇所を焼く事故を阻止する作用を有する。
According to the present invention, it can be easily manufactured only by bending using a jig, and has an action of preventing an accident of burning the body part other than the affected part by burning it.

【0010】[0010]

【実施例1】図1は本実施例を示す平面図である。ステ
ンレスの多重より線ワイヤ1により、1ヶ所に凸部7を
曲折形成し、この凸部7に対応する箇所が操作ワイヤ8
に連結されており、この操作ワイヤ8はチューブ2内に
挿入されている。より線ワイヤ1は八角形以上の多角形
に治具9を用いて曲折形成されループを形成している。
このように成形された処置具では従来の“六角型”に比
べ、ループは比較的円に近いループを形成することがで
き、小さいポリープから大きいポリープに至るまで非常
にはめ易い。しかも、“六角型”に比べ突出部が小さく
なるので患部以外の体腔内への悪影響も小さくなる等の
効果がある。
Embodiment 1 FIG. 1 is a plan view showing this embodiment. A convex portion 7 is bent and formed in one place by the stainless multi-strand wire 1, and the portion corresponding to the convex portion 7 is the operation wire 8.
The operation wire 8 is inserted into the tube 2. The twisted wire 1 is bent into a polygon having an octagonal shape or more using a jig 9 to form a loop.
In the treatment tool thus formed, the loop can form a loop that is relatively close to a circle as compared with the conventional "hexagonal type", and it is very easy to fit from a small polyp to a large polyp. In addition, since the protruding portion is smaller than that of the “hexagonal type”, the adverse effect on the body cavity other than the affected area is reduced.

【0011】また、従来の“楕円型”のように人手によ
る“しごき”工程を用いず治具9による曲折成形のみで
製作できるため、従来技術に比べ熟練を要しない分、至
極簡単に製作できる。また、形状のばらつきも無い。そ
の上、前記図8における“しごき”工程で生じる芯線3
5とより線36との湾曲部全体に渡る位置ずれによる変
形では無く、曲折点10のみの変形であるので繰り返し
開閉作動によっても、従来のものに比べ復帰力が大きく
なる。
Further, since it can be manufactured only by bending and forming by the jig 9 without using a manual "ironing" step unlike the conventional "elliptical type", it can be manufactured extremely easily as compared with the prior art because it requires no skill. . Also, there is no variation in shape. Moreover, the core wire 3 produced in the "ironing" step in FIG.
Since the deformation is not caused by the positional deviation of the curved line 5 and the stranded wire 36 over the entire curved portion, but only the bending point 10 is deformed, the restoring force becomes larger than that of the conventional one even by repeated opening and closing operations.

【0012】[0012]

【実施例2】図2は本実施例を示す斜視図である。本実
施例は、前記実施例1と同様に八角形以上のループ11
を有するが、本実施例でループを形成するのは板厚0.
1mm以下の板材でバネ性の高いステンレス材を用いて
いる。本実施例による効果は前記実施例1の効果に加
え、ループを形成するのに同一平面内での形成がより可
能になり、その結果、ポリープに対してループを水平に
向けてポリープにはめる作業がより容易になる。また、
ループをはめて閉めていく過程においてループがねじれ
てポリープを根元から切除できずに根元を残してしまう
というような従来技術の欠点が解消される。
Second Embodiment FIG. 2 is a perspective view showing the present embodiment. This embodiment is similar to the first embodiment and has an octagonal loop 11 or more.
However, in the present embodiment, the loop is formed with a plate thickness of 0.
A stainless steel material having a high spring property is used as a plate material of 1 mm or less. In addition to the effect of the first embodiment, the effect of the present embodiment makes it possible to form a loop in the same plane, and as a result, work for fitting the loop horizontally to the polyp and fitting it into the polyp. Will be easier. Also,
The drawbacks of the prior art that the loop is twisted during the process of fitting and closing the loop and the polyp cannot be excised from the root and the root remains is solved.

【0013】[0013]

【発明の効果】以上説明した様に、本発明に関わる高周
波スネアによれば、従来の“楕円型スネア”に比べ、治
具を使った曲折加工のみで簡単に作成できループの繰り
返し開閉に対して変形も生じ難い。また、従来の“六角
型スネア”に比べ、八角形以上の多角形にしたことによ
り突出部が小さくなり、患部以外の体腔内に接触して、
その箇所を焼いてしまうという事故が生ずるおそれが極
めて少なくなるとともに、ワイヤ成形のそれぞれの角度
が平角に近づくので、チューブに対する抵抗が減少し、
ワイヤの出し入れが良くなり操作性が向上する。さら
に、ループの同一平面性が向上するのでポリープを根元
から除去できずに残してしまうというような従来技術の
欠点が克服される。
As described above, according to the high-frequency snare according to the present invention, compared with the conventional "elliptical snare", it can be easily created by only the bending process using a jig, and the loop can be repeatedly opened and closed. It is difficult for it to deform. In addition, compared to the conventional "hexagonal snare", by making the polygon more than octagonal, the protrusion becomes smaller, and it contacts the body cavity other than the affected area,
The risk of accidental burning at that location is extremely low, and since each angle of wire forming approaches a rectangular angle, resistance to the tube decreases,
The wire can be put in and taken out easily and the operability is improved. In addition, the improved coplanarity of the loops overcomes the disadvantages of the prior art, which left the polyp unable to be removed from the root.

【図面の簡単な説明】[Brief description of drawings]

【図1】実施例1を示す平面図である。FIG. 1 is a plan view showing a first embodiment.

【図2】実施例2を示す斜視図である。FIG. 2 is a perspective view showing a second embodiment.

【図3】従来例を示す平面図である。FIG. 3 is a plan view showing a conventional example.

【図4】従来例を示す平面図である。FIG. 4 is a plan view showing a conventional example.

【図5】従来例を示す平面図である。FIG. 5 is a plan view showing a conventional example.

【図6】従来例を示す平面図である。FIG. 6 is a plan view showing a conventional example.

【図7】従来例を示す平面図である。FIG. 7 is a plan view showing a conventional example.

【図8】図7のB−B′線端面図である。FIG. 8 is an end view taken along line BB ′ of FIG.

【図9】従来例を示す断面図である。FIG. 9 is a cross-sectional view showing a conventional example.

【図10】従来例を示す端面図である。FIG. 10 is an end view showing a conventional example.

【符号の説明】[Explanation of symbols]

1 より線ワイヤ 2 チューブ 8 操作ワイヤ 9 治具 10 曲折点 1 Strand wire 2 Tube 8 Operating wire 9 Jig 10 Bending point

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 非導電性のチューブへ進退自在に挿通さ
れ、前記チューブの先端から突き出してループを形成す
るワイヤを具備した高周波スネアにおいて、前記ワイヤ
の形状を八角形以上の多角形に形成したことを特徴とす
る高周波スネア。
1. A high-frequency snare including a wire which is inserted into a non-conductive tube so as to be able to move back and forth and protrudes from the tip of the tube to form a loop, wherein the wire is formed into an octagonal or more polygonal shape. A high-frequency snare characterized by
【請求項2】 前記ループを形成する素材の形状を平板
状にしたことを特徴とする請求項1記載の高周波スネ
ア。
2. The high-frequency snare according to claim 1, wherein the material forming the loop has a flat plate shape.
JP3358406A 1991-12-27 1991-12-27 High-frequency snare Withdrawn JPH05176941A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3358406A JPH05176941A (en) 1991-12-27 1991-12-27 High-frequency snare

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3358406A JPH05176941A (en) 1991-12-27 1991-12-27 High-frequency snare

Publications (1)

Publication Number Publication Date
JPH05176941A true JPH05176941A (en) 1993-07-20

Family

ID=18459132

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3358406A Withdrawn JPH05176941A (en) 1991-12-27 1991-12-27 High-frequency snare

Country Status (1)

Country Link
JP (1) JPH05176941A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5947979A (en) * 1997-08-07 1999-09-07 Asahi Kogaku Kogyo Kabushiki Kaisha Wire loop type instrument for endoscope and method of producing the same
US6224611B1 (en) 1998-09-14 2001-05-01 Asahi Kogaku Kogyo Kabushiki Kaisha Snare for endoscope
US6299612B1 (en) 1998-09-02 2001-10-09 Asahi Kogaku Kogyo Kabushiki Kaisha Wire loop type instrument for endoscope and method of producing the same

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5947979A (en) * 1997-08-07 1999-09-07 Asahi Kogaku Kogyo Kabushiki Kaisha Wire loop type instrument for endoscope and method of producing the same
US6299612B1 (en) 1998-09-02 2001-10-09 Asahi Kogaku Kogyo Kabushiki Kaisha Wire loop type instrument for endoscope and method of producing the same
US6224611B1 (en) 1998-09-14 2001-05-01 Asahi Kogaku Kogyo Kabushiki Kaisha Snare for endoscope

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