JPH0544295B2 - - Google Patents
Info
- Publication number
- JPH0544295B2 JPH0544295B2 JP60089968A JP8996885A JPH0544295B2 JP H0544295 B2 JPH0544295 B2 JP H0544295B2 JP 60089968 A JP60089968 A JP 60089968A JP 8996885 A JP8996885 A JP 8996885A JP H0544295 B2 JPH0544295 B2 JP H0544295B2
- Authority
- JP
- Japan
- Prior art keywords
- wire
- operating
- sheath
- biopsy
- force
- 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.)
- Expired - Lifetime
Links
- 238000011282 treatment Methods 0.000 claims description 18
- 238000012277 endoscopic treatment Methods 0.000 claims description 6
- 238000001839 endoscopy Methods 0.000 claims 1
- 238000001574 biopsy Methods 0.000 description 19
- 229910001220 stainless steel Inorganic materials 0.000 description 4
- 210000003811 finger Anatomy 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- 101150038956 cup-4 gene Proteins 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000001861 endoscopic biopsy Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 210000003813 thumb Anatomy 0.000 description 1
Landscapes
- Surgical Instruments (AREA)
- Endoscopes (AREA)
Description
【発明の詳細な説明】
〔発明の技術分野〕
本発明は生検鉗子や把持鉗子などの内視鏡用処
置具に関する。DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to endoscopic treatment tools such as biopsy forceps and grasping forceps.
内視鏡用処置具、たとえば生検鉗子は可撓性の
シースの先端に一対の生検カツプを設けてなり、
この生検カツプは上記シース内に挿通されたワイ
ヤを押し引きすることにより開閉されるようにな
つている(特開昭59−202576号公報)。
An endoscopic treatment tool, such as a biopsy forceps, has a pair of biopsy cups at the tip of a flexible sheath.
This biopsy cup is opened and closed by pushing and pulling a wire inserted into the sheath (Japanese Patent Laid-Open No. 59-202576).
ところが、上記操作用ワイヤは多数のステンレ
スワイヤ素線を撚合して1本のロープ状に構成し
たものが用いられている。そして、1本のワイヤ
をそのまま全長にわたり用いる場合と、同じもの
を途中で接続して1本のものとして用いる場合が
ある。 However, the above-mentioned operating wire is constructed by twisting a large number of stainless steel wires into a single rope shape. There are cases where one wire is used as it is over the entire length, and cases where the same wire is connected in the middle and used as a single wire.
しかしながら、このように操作ワイヤの全長に
わたりその撚り方向が同じであるため、操作ワイ
ヤを強く引いたときにその撚りが戻る方向に回転
しようとする力が生じる。そして、この回転力が
生検カツプの開閉操作部材に伝わり、その開閉操
作部材をねじり、動きによる摺動抵抗を増大させ
る。このため、充分な作動力を生検カツプに伝え
ることができない。また、操作ワイヤを押し込み
生検カツプを閉くときにも同様である。 However, since the twisting direction is the same over the entire length of the operating wire, when the operating wire is strongly pulled, a force is generated that tends to rotate the operating wire in the direction in which the twist returns. This rotational force is then transmitted to the opening/closing operation member of the biopsy cup, twisting the opening/closing operation member, and increasing the sliding resistance due to the movement. Therefore, sufficient actuation force cannot be transmitted to the biopsy cup. The same applies when pushing in the operating wire and closing the biopsy cup.
本発明は上記事情に着目してなされたもので、
その目的とするところは撚合してなる操作ワイヤ
に力が加わつてもその操作ワイヤ自身に回転力が
生ぜず、先端処置部の円滑かつ確実な動作を行な
う内視鏡用処置具を提供することにある。
The present invention has been made focusing on the above circumstances,
The purpose is to provide an endoscopic treatment instrument in which even if force is applied to the twisted operation wires, no rotational force is generated in the operation wires themselves, and the distal treatment section can operate smoothly and reliably. There is a particular thing.
本発明は処置部を操作する操作ワイヤが互いに
撚り方向の異なる少なくとも2本以上のワイヤ部
を連結して構成した内視鏡用処置具である。
The present invention is an endoscopic treatment instrument in which the operation wire for operating the treatment section is constructed by connecting at least two or more wire portions with mutually different twist directions.
以下、本発明の一実施例を図面にもとづいて説
明する。
Hereinafter, one embodiment of the present invention will be described based on the drawings.
この実施例は内視鏡用生検鉗子である。この生
検鉗子はシース1、操作部2および先端処置部3
とから構成されている。操作部2はシース1の基
端に取り付けられ、先端処置部3はシース1の先
端に取り付けられている。先端処置部3は一対の
生検カツプ4,4を軸ピン5に枢着してなり、上
記生検カツプ4,4はリンク機構6を介して後述
する操作ワイヤ7により開閉操作される。操作ワ
イヤ7はシース1内を通じて操作部2に導びか
れ、その操作部2のスライダ8に連結されてい
る。そして、操作部2の本体9に設けた指掛けリ
ング10に親指をかけ、同じ手の人差し指と中指
をスライダ8にかけてそのスライダ8を移動する
ことにより上記操作ワイヤ7を押し引き操作する
ようになつている。 This embodiment is an endoscopic biopsy forceps. This biopsy forceps includes a sheath 1, an operation section 2, and a tip treatment section 3.
It is composed of. The operating section 2 is attached to the proximal end of the sheath 1, and the distal treatment section 3 is attached to the distal end of the sheath 1. The distal treatment section 3 includes a pair of biopsy cups 4, 4 which are pivotally connected to a shaft pin 5, and the biopsy cups 4, 4 are opened and closed via a link mechanism 6 by an operating wire 7, which will be described later. The operating wire 7 is guided to the operating section 2 through the sheath 1 and connected to the slider 8 of the operating section 2. Then, by placing the thumb on the finger ring 10 provided on the main body 9 of the operation section 2 and placing the index finger and middle finger of the same hand on the slider 8 and moving the slider 8, the operation wire 7 can be pushed and pulled. There is.
一方、上記シース1は密巻きコイルからなる。
さらに、この密巻きコイルは先端側のコイル部1
1と後端側のコイル部12とに分かれ、この両コ
イル部11,12は接続管13を介して接続され
ている。また、各コイル部11,12は同じ太さ
のステンレス製のワイヤを密に巻回してなるが、
その巻き方向は反対である。各コイル部11,1
2の長さは同じにしてある。 On the other hand, the sheath 1 is made of a tightly wound coil.
Furthermore, this tightly wound coil has a coil part 1 on the tip side.
1 and a coil portion 12 on the rear end side, and both coil portions 11 and 12 are connected via a connecting tube 13. In addition, each coil part 11, 12 is made of stainless steel wire of the same thickness wound closely,
Its winding direction is opposite. Each coil part 11,1
The lengths of the two are the same.
また、上記操作ワイヤ7は第2図で示すように
先端側のワイヤ部13と後端部のワイヤ部14と
に分かれ、この各ワイヤ部13,14は接続管1
5を介して接続されている。そして、この各ワイ
ヤ部13,14はいずれも第3図で示すように1
本の芯ストランド16と複数本の側ストランド1
7,…とからなるが、その撚り方向は互いに逆に
なつている。つまり、側ストランド17,…の巻
き付け方向が第2図で示すように逆向きとなる。
なお、上記各ストランド16,17,…は第3図
で示すように多数のステンレスワイヤ素線18,
…を撚合してなり、芯ストランド16と側ストラ
ンド17,…の撚り方向は逆向きとなつている。
しかして、各ワイヤ部13,14の撚り方向とは
その全体的な特性を意味し、同じ外力を加えたと
きそのワイヤ部13,14が示す回転の向きが逆
であればその撚り方向が逆であるとする。 Further, as shown in FIG. 2, the operating wire 7 is divided into a wire portion 13 at the tip side and a wire portion 14 at the rear end, and each wire portion 13, 14 is connected to the connecting tube 1.
5. Each of these wire portions 13 and 14 is connected to one wire as shown in FIG.
Book core strand 16 and multiple side strands 1
7,..., but the twist directions are opposite to each other. In other words, the winding directions of the side strands 17, . . . are reversed as shown in FIG.
In addition, each of the above-mentioned strands 16, 17, ... is composed of a large number of stainless steel wire strands 18,
The core strand 16 and the side strands 17, . . . are twisted in opposite directions.
Therefore, the twist direction of each wire section 13, 14 means its overall characteristics, and if the direction of rotation of the wire sections 13, 14 is opposite when the same external force is applied, the twist direction is opposite. Suppose that
さらに、上記各ワイヤ部13,14はその撚り
方向が逆であるだけで、その他は同じであるとと
もに、その長さも等しくしてある。 Further, each of the wire portions 13 and 14 is the same except for the direction in which the wires are twisted, and the length thereof is also the same.
操作ワイヤ7の先端には第2図で示すように先
端操作部材21が取り付けられており、この先端
操作部材21にはピン22を介して上記リンク機
構6のリンク23,23に枢着されている。上記
リンク23,23の他端は別のピン24,24を
介して生検カツプ4,4の基端部に枢着されてい
る。 As shown in FIG. 2, a tip operating member 21 is attached to the tip of the operating wire 7, and is pivotally connected to the links 23, 23 of the link mechanism 6 via a pin 22. There is. The other ends of the links 23, 23 are pivotally connected to the proximal ends of the biopsy cups 4, 4 via further pins 24, 24.
しかして、上記生検鉗子を使用する場合、その
先端処置部3およびシース1を内視鏡の挿通チヤ
ンネルを通じて体腔内に導入するとともに、その
内視鏡による観視下で生検鉗子を操作する。すな
わち、生検カツプ4,4を開くときには本体8に
対してスライダ7を押し込む。また、生検カツプ
4,4を閉じるときには本体8に対してスライダ
7を手元側に引く。このとき、先端処置部3の各
部材が操作ワイヤ7を介して操作部2側に引かれ
ることによつてシース1には圧縮力が加わるとと
もに、その操作ワイヤ7には引張り力が加わる。
そして、まず、シース1に加わる圧縮力は各コイ
ル部11,12にそれぞれ加わり、第1図で示す
巻き方向では先端正面側から見て先端側のコイル
部11は右回転、後端側のコイル部12は左回転
する。しかも、各コイル部11,12の長さは同
じであるから回転方向は逆でも同量の回転が起
る。したがつて、この各回転は互いに打ち消さ
れ、シース1の全体としての回転は生じない。つ
まり、先端処置部3には何ら回転が伝わらない。 When using the biopsy forceps, the tip treatment section 3 and sheath 1 are introduced into the body cavity through the insertion channel of the endoscope, and the biopsy forceps are operated under observation using the endoscope. . That is, when opening the biopsy cups 4, 4, the slider 7 is pushed into the main body 8. Further, when closing the biopsy cups 4, 4, the slider 7 is pulled toward the proximal side with respect to the main body 8. At this time, each member of the distal treatment section 3 is pulled toward the operating section 2 via the operating wire 7, so that a compressive force is applied to the sheath 1, and a tensile force is applied to the operating wire 7.
First, the compressive force applied to the sheath 1 is applied to each of the coil parts 11 and 12, and in the winding direction shown in FIG. The portion 12 rotates to the left. Moreover, since the lengths of each coil portion 11 and 12 are the same, the same amount of rotation occurs even if the rotation direction is reversed. Therefore, these rotations cancel each other out, and no rotation of the sheath 1 as a whole occurs. In other words, no rotation is transmitted to the distal treatment section 3.
なお、生検カツプ4を開くときにはシース1に
引張り力が加わるが、このときも上記同様の作用
により先端処置部3は回転をしない。 Although a tensile force is applied to the sheath 1 when the biopsy cup 4 is opened, the distal treatment section 3 does not rotate at this time due to the same action as described above.
このため、被処置部位に対する狙いが付け易
く、また、狙つた部位を正確に処置できる。 Therefore, it is easy to aim at the region to be treated, and the targeted region can be treated accurately.
一方、引張り力が加わる操作ワイヤ7のワイヤ
部13,14ではその撚り方向に応じて撚りを戻
す方向の回転力が生じる。特に、生検カツプ4,
4で生体組織をくいちぎろうとして強い力で引け
ば引くほど大きな回転力が生じる。しかし、各ワ
イヤ部13,14の撚り方向は互いに逆向きであ
るからその回転は接続管15付近で互いに打ち消
し合う。このため、先端処置部3の先端操作部材
21およびリンク機構6には伝わらない。したが
つて、これらの枢支部にひねりを与えるなどその
摺動抵抗が増すことなく、円滑かつ確実に生検カ
ツプ4,4を作動させることができる。 On the other hand, in the wire portions 13 and 14 of the operating wire 7 to which the tensile force is applied, a rotational force in the direction of untwisting is generated depending on the twisting direction. In particular, biopsy cup 4,
4, the stronger the force you pull to tear apart the living tissue, the greater the rotational force generated. However, since the twist directions of the wire portions 13 and 14 are opposite to each other, their rotations cancel each other out near the connecting tube 15. Therefore, it is not transmitted to the distal end operation member 21 of the distal treatment section 3 and the link mechanism 6. Therefore, the biopsy cups 4, 4 can be operated smoothly and reliably without twisting these pivot points or increasing their sliding resistance.
ところで、上記実施例では各コイル部11,1
2の素線の径とその全長をそれぞれ同一とした
が、完全に同一でなくとも、先端処置部3の回転
はかなり充分に防止できる。 By the way, in the above embodiment, each coil portion 11, 1
Although the diameters and overall lengths of the two strands are the same, even if they are not completely the same, rotation of the distal treatment section 3 can be prevented quite sufficiently.
また、先端側のコイル部11を細い素線とし、
後端側のコイル部12を太い素線とするととも
に、先端側のコイル部11の全長を後端側のコイ
ル部12の全長より短かくして圧縮力や引張り力
に対して各コイル部11,12の回転が同じにな
るようにしてもよい。この実施例によれば、先端
側のコイル部11をより柔かくすることができ
る。したがつて、たとえば内視鏡の湾曲部内を通
過するときの抵抗を小さくできる。 In addition, the coil portion 11 on the tip side is made of a thin wire,
The coil portion 12 on the rear end side is made of a thick wire, and the total length of the coil portion 11 on the front end side is made shorter than the total length of the coil portion 12 on the rear end side, so that each coil portion 11, 12 is resistant to compressive force and tensile force. The rotations may be the same. According to this embodiment, the coil portion 11 on the distal end side can be made softer. Therefore, for example, the resistance when passing through the curved portion of the endoscope can be reduced.
また、各コイル部11,12の少なくとも一方
を2条またはこれ以上の多条巻きとしてもよい。 Moreover, at least one of each coil portion 11, 12 may be wound with two or more threads.
また、コイル部は2本でなくとも3本以上とし
てもよい。 Further, the number of coil portions is not limited to two, but may be three or more.
一方、操作ワイヤ7における先端側のワイヤ部
13は後端側のワイヤ部14よりもその長さを短
かくし、さらに、そのステンレスワイヤ素線1
8,…を細く、且つ撚り本数を多くしてもよい。
これによると、引張り力に対しての撚りは完全に
は解消されないが、そのワイヤ部13を柔くで
き、これを内視鏡の湾曲部を通したときの開閉作
動が円滑になる。 On the other hand, the wire portion 13 on the tip side of the operation wire 7 is made shorter in length than the wire portion 14 on the rear end side, and furthermore, the stainless steel wire 1
8,... may be made thinner and the number of twists may be increased.
According to this, although the twisting caused by the tensile force is not completely eliminated, the wire portion 13 can be made softer, and the opening and closing operation when the wire portion 13 is passed through the curved portion of the endoscope becomes smooth.
なお、上記実施例のように操作ワイヤ7が芯ス
トランド16と側ストランド17,…からなる場
合はその側ストランド17,…のみの撚り方向を
途中で変えて1本のものとしてもよい。この場合
には接続管15が不用でその分、より細径化が図
れる。また、芯ストランドと側ストランドからな
る操作ワイヤではなく、単に撚り合せたワイヤで
あつてもよい。 In addition, when the operating wire 7 is composed of the core strand 16 and the side strands 17, . . . as in the above embodiment, the direction of twisting only the side strands 17, . In this case, the connecting tube 15 is unnecessary, and the diameter can be made smaller accordingly. Further, instead of the operating wire consisting of a core strand and side strands, it may be a wire simply twisted together.
さらに、本発明は生検鉗子の場合に限らず、把
持鉗子などの処置具にも同様に適用できる。 Furthermore, the present invention is not limited to the case of biopsy forceps, but can be similarly applied to treatment instruments such as grasping forceps.
以上説明したように本発明によれば、操作ワイ
ヤを操作時にその操作ワイヤに力が加わつても先
端の処置部の作動部分には回転力が伝わらない。
したがつて、作動力が処置部に充分に伝わり、確
実かつ円滑な動作を行なわせることができる。
As described above, according to the present invention, even if force is applied to the operating wire when the operating wire is operated, the rotational force is not transmitted to the operating portion of the treatment section at the distal end.
Therefore, the operating force is sufficiently transmitted to the treatment section, allowing reliable and smooth operation.
第1図は本発明の一実施例を示す内視鏡用処置
具の側面図、第2図は同じくその先端部の側断面
図、第3図は同じくそのワイヤ部の縦断面図であ
る。
1……シース、3……先端処置部、7……操作
ワイヤ、11,12……コイル部。
FIG. 1 is a side view of an endoscopic treatment instrument showing an embodiment of the present invention, FIG. 2 is a side sectional view of the distal end thereof, and FIG. 3 is a longitudinal sectional view of the wire portion thereof. DESCRIPTION OF SYMBOLS 1... Sheath, 3... Tip treatment part, 7... Operation wire, 11, 12... Coil part.
Claims (1)
してなる操作ワイヤを通し、この操作により上記
処置部を操作するようにした内視鏡用処置具にお
いて、互いに撚り方向の異なる少なくとも2本以
上のワイヤ部を連結して1本の操作ワイヤを構成
し、各ワイヤ部の撚り方向の相違によりその操作
ワイヤに力が加わつたとき生じる回転を互いに打
ち消し合うようにしたことを特徴とする内視鏡用
処置具。1. In an endoscopic treatment instrument in which a twisted operation wire is passed through a sheath with a treatment section attached to the tip, and the treatment section is operated by this operation, at least two wires are twisted in different directions. The above-mentioned wire parts are connected to form a single operating wire, and rotations generated when force is applied to the operating wire are canceled out due to the different twist directions of the wire parts. Endoscopy treatment equipment.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP60089968A JPS61247442A (en) | 1985-04-26 | 1985-04-26 | Disposal tool for endoscope |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP60089968A JPS61247442A (en) | 1985-04-26 | 1985-04-26 | Disposal tool for endoscope |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS61247442A JPS61247442A (en) | 1986-11-04 |
JPH0544295B2 true JPH0544295B2 (en) | 1993-07-06 |
Family
ID=13985482
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP60089968A Granted JPS61247442A (en) | 1985-04-26 | 1985-04-26 | Disposal tool for endoscope |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS61247442A (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0428567Y2 (en) * | 1987-08-04 | 1992-07-10 |
-
1985
- 1985-04-26 JP JP60089968A patent/JPS61247442A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS61247442A (en) | 1986-11-04 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPH0560752B2 (en) | ||
JP3634655B2 (en) | Endoscopic biopsy forceps | |
US5820630A (en) | Medical forceps jaw assembly | |
JPS637218Y2 (en) | ||
US5899854A (en) | Speculum and method for inserting an elongated instrument into an animal's body | |
US5601599A (en) | Flexible surgical instruments incorporating a hollow lumen coil having areas of different preload tension | |
US20110029010A1 (en) | Flexible dissecting forceps | |
EP2147638A1 (en) | Endoscopically inserting surgical tool | |
US20110184458A1 (en) | Medical Gripping Device | |
US6364846B1 (en) | Treating tool for an endoscope | |
JP4526544B2 (en) | Endoscopic treatment tool | |
EP1974675A1 (en) | Endoscopic treatment tool | |
JPH0428567Y2 (en) | ||
JP5859260B2 (en) | forceps | |
JP6408024B2 (en) | Medical treatment tool | |
JPH0544295B2 (en) | ||
JPH061696Y2 (en) | Endoscopic treatment tool | |
JP2003126103A (en) | Forceps for endoscope | |
JPH03139340A (en) | Treating implement for endoscope | |
WO2012006491A1 (en) | Suturing system | |
JPH0544294B2 (en) | ||
JP3615800B2 (en) | Endoscopic treatment tool | |
JPH0446730Y2 (en) | ||
JP3549419B2 (en) | Endoscope forceps | |
JP2001321385A (en) | Forceps for endoscope |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
EXPY | Cancellation because of completion of term |