JPH11244223A - Treating tool inserting channel of endoscope - Google Patents
Treating tool inserting channel of endoscopeInfo
- Publication number
- JPH11244223A JPH11244223A JP10054632A JP5463298A JPH11244223A JP H11244223 A JPH11244223 A JP H11244223A JP 10054632 A JP10054632 A JP 10054632A JP 5463298 A JP5463298 A JP 5463298A JP H11244223 A JPH11244223 A JP H11244223A
- Authority
- JP
- Japan
- Prior art keywords
- endoscope
- insertion channel
- metal pipe
- flexible tube
- treatment tool
- 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- Withdrawn
Links
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- Endoscopes (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】この発明は、内視鏡の挿入部
内に挿通配置された処置具挿通チャンネルに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a treatment instrument insertion channel inserted into an insertion portion of an endoscope.
【0002】[0002]
【従来の技術】内視鏡の処置具挿通チャンネルは一般
に、四フッ化エチレン樹脂チューブ等のような可撓性チ
ューブによって形成されている。特に、遠隔操作によっ
て屈曲自在な湾曲部内に位置する部分は、小さな曲率半
径で繰り返し曲げられるので、滑りのよい可撓性チュー
ブ以外の部材の使用はこれまで考えられなかった。2. Description of the Related Art Generally, a treatment tool insertion channel of an endoscope is formed of a flexible tube such as an ethylene tetrafluoride resin tube. In particular, since a portion located in a bendable portion that can be bent by remote operation is repeatedly bent with a small radius of curvature, the use of a member other than a slippery flexible tube has not been considered.
【0003】[0003]
【発明が解決しようとする課題】内視鏡の処置具挿通チ
ャンネル内には、各種の処置具が挿脱されるが、体腔内
の光学的観察と超音波断層観察とを行うようにした超音
波内視鏡で処置を行う際には、例えば4cmを越えるよ
うな非常に長い針を有する穿刺具を用いる場合がある。Various treatment tools are inserted into and removed from the treatment tool insertion channel of the endoscope. When performing treatment with an ultrasonic endoscope, a puncture device having a very long needle, for example, exceeding 4 cm, may be used.
【0004】そのような穿刺具を挿通する場合に湾曲部
が曲げられた状態になっていると、例えば図8に示され
るように、穿刺具100の先端に取り付けられた針10
1が湾曲部2内で処置具挿通チャンネル11に刺さって
孔をあけてしまう場合がある。処置具挿通チャンネル1
1に孔があくと、内視鏡内部への水漏れが発生するの
で、重修理が必要となる。[0004] When such a puncture device is inserted, if the curved portion is bent, the needle 10 attached to the tip of the puncture device 100 as shown in FIG.
1 may pierce the treatment tool insertion channel 11 in the curved portion 2 to make a hole. Treatment instrument insertion channel 1
If a hole is made in 1, water leaks into the endoscope, and heavy repair is required.
【0005】そのようなことが起きないように、本来、
針101は穿刺具100の外套管102内に引っ込めら
れるようになっている。しかし、針101を処置具挿通
チャンネル11からAに示されるように一旦突出させた
後、体腔内で内視鏡を移動させる際には、体腔内を傷付
けないように穿刺具100を処置具挿通チャンネル11
内に引っ込める。そのような際には、針101を外套管
102から突き出したままの状態で操作する場合が少な
くないので、上述のような事故が起こりがちである。[0005] To prevent such a situation from occurring,
The needle 101 is retracted into the mantle tube 102 of the puncture device 100. However, after the needle 101 is once protruded from the treatment instrument insertion channel 11 as shown by A, when the endoscope is moved in the body cavity, the puncture tool 100 is inserted so as not to damage the body cavity. Channel 11
Retract inside. In such a case, since the needle 101 is often operated with the needle 101 protruding from the mantle tube 102, the above-described accident tends to occur.
【0006】そこで本発明は、湾曲部を屈曲させたまま
の状態で針先が突出した穿刺具を挿脱しても孔あき事故
が発生しない耐久性の優れた内視鏡の処置具挿通チャン
ネルを提供することを目的とする。[0006] Therefore, the present invention provides a treatment tool insertion channel for an endoscope having excellent durability that does not cause a perforation accident even when a puncture device with a protruding needle tip is inserted and removed with the bent portion being bent. The purpose is to provide.
【0007】[0007]
【課題を解決するための手段】上記の目的を達成するた
め、本発明の内視鏡の処置具挿通チャンネルは、遠隔操
作によって屈曲自在な湾曲部が先端部分に設けられた内
視鏡の挿入部内に全長にわたって挿通配置された内視鏡
の処置具挿通チャンネルにおいて、少なくとも上記湾曲
部内に位置する部分を超弾性金属製のパイプによって形
成したことを特徴とする。In order to achieve the above object, a treatment tool insertion channel of an endoscope according to the present invention has a distal end provided with a bendable bending portion provided at a distal end portion by remote control. In the treatment tool insertion channel of the endoscope inserted through the entire length of the section, at least a portion located in the curved portion is formed by a superelastic metal pipe.
【0008】なお、上記超弾性金属パイプが上記湾曲部
外において可撓性チューブと連結されていてもよく、そ
の場合、上記超弾性金属パイプとの連結部近傍におい
て、上記可撓性チューブの外周に補強部材が螺旋状に巻
回されていてもよい。[0008] The superelastic metal pipe may be connected to the flexible tube outside the curved portion. In this case, the outer periphery of the flexible tube is connected near the connection with the superelastic metal pipe. The reinforcing member may be spirally wound.
【0009】また、上記超弾性金属パイプが、上記可撓
性チューブの外径寸法を越えない外径寸法で上記可撓性
チューブの内径より太い内径に形成されていてもよい。The superelastic metal pipe may have an outer diameter not exceeding the outer diameter of the flexible tube and an inner diameter larger than the inner diameter of the flexible tube.
【0010】[0010]
【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1は超音波内視鏡の全体構成を示して
おり、可撓管によって外装された挿入部1は途中で縮小
率を変えて図示されている。Embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows an entire configuration of an ultrasonic endoscope, and an insertion portion 1 covered with a flexible tube is illustrated with a reduction ratio changed in the middle.
【0011】挿入部1の先端部分に連結された湾曲部2
は、挿入部1の基端部分に連結された操作部3からの遠
隔操作によって任意の方向に任意の角度だけ屈曲自在で
ある。4は、その操作を行うための湾曲操作ノブであ
る。Bending part 2 connected to the tip of insertion part 1
Is bendable by an arbitrary angle in an arbitrary direction by a remote operation from an operation unit 3 connected to a base end portion of the insertion unit 1. Reference numeral 4 denotes a bending operation knob for performing the operation.
【0012】湾曲部2の先端側には、光学観察用の対物
光学系と超音波断層観察用の超音波プローブとが内蔵さ
れた先端部本体5が連結されており、光学観察像は操作
部3に突設された接眼部6を通して観察される。A distal end main body 5 containing an objective optical system for optical observation and an ultrasonic probe for ultrasonic tomographic observation is connected to the distal end side of the bending portion 2. It is observed through an eyepiece 6 projecting from 3.
【0013】操作部3に連結された第1の可撓性連結管
7の先端には、図示されていない光源ランプから放射さ
れた照明光を受けるためのライトガイドコネクタ8が取
り付けられている。A light guide connector 8 for receiving illumination light radiated from a light source lamp (not shown) is attached to a distal end of the first flexible connection pipe 7 connected to the operation section 3.
【0014】また、操作部3に連結された第2の可撓性
連結管9の先端には、図示されていない超音波信号処理
装置に接続される超音波信号コネクタ10が取り付けら
れている。An ultrasonic signal connector 10 connected to an ultrasonic signal processing device (not shown) is attached to the distal end of the second flexible connection pipe 9 connected to the operation section 3.
【0015】図2と図3は先端部本体5付近の平面図と
側面図であり、共に湾曲部2側の部分は断面を示してあ
る。図4は、湾曲部2から先端部本体5側を見た状態の
湾曲部2の断面図である。FIGS. 2 and 3 are a plan view and a side view, respectively, of the vicinity of the distal end body 5, and the cross section of the curved portion 2 is shown. FIG. 4 is a cross-sectional view of the bending portion 2 in a state where the distal end main body 5 side is viewed from the bending portion 2.
【0016】光学観察用の観察窓13と照明窓14は、
斜め前方に向けて先端部本体5に形成された斜面に配置
され、観察窓13の近傍には送気送水ノズル15が配置
されている。The observation window 13 and the illumination window 14 for optical observation are
An air supply / water supply nozzle 15 is disposed near the observation window 13 on the slope formed on the tip end body 5 obliquely forward.
【0017】また、それらと並んで、操作部3から遠隔
操作される操作ワイヤ16によって軸18を中心に回動
操作される処置具起上台17が配置されており、その後
側に隣接して処置具挿通チャンネル11の出口が配置さ
れている。A treatment tool raising table 17 that is rotated around an axis 18 by an operation wire 16 that is remotely operated from the operation unit 3 is arranged alongside them, and a treatment tool raising table 17 is provided adjacent to the rear side. The outlet of the tool insertion channel 11 is arranged.
【0018】超音波プローブ20は先端部本体5の先側
部分に側方に向けて配置され、超音波装置コネクタ10
との間を接続する信号ケーブル19が、先端部本体5内
を通って湾曲部2からさらに挿入部1内を通過してい
る。The ultrasonic probe 20 is disposed laterally on the front end portion of the distal end main body 5 and is connected to the ultrasonic device connector 10.
A signal cable 19 connecting between the first and second portions passes through the distal end portion main body 5 and further from the curved portion 2 to the inside of the insertion portion 1.
【0019】湾曲部2は、多数の節輪21を回動自在に
リベットで連結してゴムチューブ22で外装して構成さ
れており、4本の操作ワイヤ23のうち操作部3側から
牽引された操作ワイヤ23の方向に屈曲する。The bending portion 2 is composed of a number of articulation rings 21 rotatably connected by rivets and covered with a rubber tube 22. The bending portion 2 is pulled from the operation portion 3 side of the four operation wires 23. Bent in the direction of the operating wire 23.
【0020】31と32は送気チューブと送水チュー
ブ、33は観察像伝達用のイメージガイドファイババン
ドル、34は照明光伝達用のライトガイドファイババン
ドルである。Reference numerals 31 and 32 denote an air supply tube and a water supply tube, 33 denotes an image guide fiber bundle for transmitting an observation image, and 34 denotes a light guide fiber bundle for transmitting illumination light.
【0021】図1に戻って、処置具挿通チャンネル11
は、挿入部1内の全長にわたって挿通配置されており、
その入口は、操作部3の下部に斜め上向きに配置された
鉗子栓12の内側に位置し、出口は前述のように先端部
本体5に位置している。Returning to FIG. 1, the treatment tool insertion channel 11
Is inserted and arranged over the entire length of the insertion portion 1,
The entrance is located inside the forceps stopper 12 which is arranged obliquely upward at the lower part of the operation unit 3, and the exit is located on the distal end body 5 as described above.
【0022】この処置具挿通チャンネル11は、挿入部
1内にある連結部11dより先側の部分11aは超弾性
金属パイプによって形成され、連結部11dより手元側
の部分11bは四フッ化エチレン樹脂チューブ等からな
る可撓性チューブによって形成されている。In the treatment tool insertion channel 11, a portion 11a on the front side of the connecting portion 11d in the insertion portion 1 is formed by a superelastic metal pipe, and a portion 11b on the hand side of the connecting portion 11d is a tetrafluoroethylene resin. It is formed by a flexible tube made of a tube or the like.
【0023】超弾性金属パイプ部11aは、例えばTi
−Ni(チタン−ニッケル)系のものであり、軽い力で
曲がりしかも非常に高い弾性限界を有しているので、内
視鏡の湾曲部2内に配置したとき、折れることなく湾曲
部2の屈曲に追従して曲がることができる。The superelastic metal pipe 11a is made of, for example, Ti
-Ni (titanium-nickel) type, which bends with a light force and has a very high elastic limit, so that when it is disposed in the bending portion 2 of the endoscope, the bending portion 2 does not break. It can bend following the bend.
【0024】図5は、超弾性金属パイプ部11aと可撓
性チューブ部11bとの接続部Aを示しており、肉厚の
薄い超弾性金属パイプ部11aがそれと内径寸法が等し
い可撓性チューブ部11b内に圧入接着されて連結接続
されている。FIG. 5 shows a connecting portion A between the superelastic metal pipe portion 11a and the flexible tube portion 11b. The thin superelastic metal pipe portion 11a is formed of a flexible tube having an inner diameter equal to that of the superelastic metal pipe portion 11a. It is press-fitted and bonded into the portion 11b and connected.
【0025】このように構成された超音波内視鏡におい
ては、処置具挿通チャンネル11の湾曲部2内に位置す
る部分が超弾性金属パイプによって形成されているの
で、湾曲部2が屈曲された状態の時に、先端から針が突
出した状態の穿刺具を処置具挿通チャンネル11に挿脱
させても、針先が処置具挿通チャンネル11に突き刺さ
らず、処置具挿通チャンネル11の孔あき事故が発生し
ない。In the ultrasonic endoscope thus configured, since the portion of the treatment instrument insertion channel 11 located inside the curved portion 2 is formed by a superelastic metal pipe, the curved portion 2 is bent. In this state, even if the puncture device with the needle protruding from the distal end is inserted into and removed from the treatment tool insertion channel 11, the needle tip does not pierce the treatment device insertion channel 11, and a hole in the treatment tool insertion channel 11 may be perforated. Does not occur.
【0026】なお、処置具挿通チャンネル11の連結部
11d付近が曲げられると、その近くで可撓性チューブ
部11b側が急激に曲がって折れやすいので、それを防
止するために、図6に示されるように、連結部11dか
ら可撓性チューブ部11b側にかけて、バネ性のある金
属細線製のコイル11cを螺旋状に巻回してもよい。When the vicinity of the connecting portion 11d of the treatment instrument insertion channel 11 is bent, the flexible tube portion 11b is sharply bent and broken near the connecting portion 11d, so that it is shown in FIG. As described above, the coil 11c made of a thin metal wire having a spring property may be spirally wound from the connecting portion 11d to the flexible tube portion 11b.
【0027】また、超弾性金属パイプ部11aは可撓性
チューブ部11bより肉厚が薄くて済むので、図7に示
されるように、超弾性金属パイプ部11aの外径寸法が
可撓性チューブ部11bの外径寸法を越えない範囲にお
いて超弾性金属パイプ部11aの内径寸法を可撓性チュ
ーブ部11bの内径寸法より大きくすれば、湾曲部2に
おける処置具の通過性を向上させることができる。11
eは、超弾性金属パイプ部11aと可撓性チューブ部1
1bとを接続する接続口金である。Since the superelastic metal pipe portion 11a needs to be thinner than the flexible tube portion 11b, as shown in FIG. 7, the outer diameter of the superelastic metal pipe portion 11a is If the inner diameter of the superelastic metal pipe portion 11a is made larger than the inner diameter of the flexible tube portion 11b within a range not exceeding the outer diameter of the portion 11b, the passage of the treatment instrument through the bending portion 2 can be improved. . 11
e is the super-elastic metal pipe 11a and the flexible tube 1
1b.
【0028】なお、上記実施の形態においては、先端部
本体5に超弾性金属パイプ部11aが連結接続されて、
連結部11dが湾曲部2の後端部に近い位置にあるが、
本発明の処置具挿通チャンネル11は、少なくとも湾曲
部2内に位置する部分が超弾性金属パイプによって形成
されていればよい。In the above embodiment, the superelastic metal pipe 11a is connected to the distal end body 5 so as to be connected.
Although the connecting portion 11d is located near the rear end of the curved portion 2,
In the treatment tool insertion channel 11 of the present invention, at least a portion located inside the curved portion 2 may be formed of a superelastic metal pipe.
【0029】また、超弾性金属パイプ部11aの外面に
どの様な部材を被覆しても差し支えない。そして本発明
は、超音波内視鏡の処置具挿通チャンネルに限らず、一
般の内視鏡の処置具挿通チャンネルに広く適用すること
ができる。The outer surface of the superelastic metal pipe portion 11a may be covered with any member. The present invention is not limited to the treatment instrument insertion channel of the ultrasonic endoscope, and can be widely applied to the treatment instrument insertion channel of a general endoscope.
【0030】[0030]
【発明の効果】本発明によれば、処置具挿通チャンネル
の少なくとも湾曲部内に位置する部分を超弾性金属製の
パイプによって形成したことにより、湾曲部を屈曲させ
たままの状態で、先端から針が突出した状態の穿刺具を
処置具挿通チャンネル内に挿通させても、針先が処置具
挿通チャンネルに突き刺さらないので、孔あき事故を完
全に防止することができる。According to the present invention, at least a portion of the treatment instrument insertion channel located in the curved portion is formed of a superelastic metal pipe, so that the needle can be inserted from the distal end while the curved portion remains bent. Even if the puncture tool with the protruding portion is inserted into the treatment tool insertion channel, the needle tip does not pierce the treatment tool insertion channel, so that a perforated accident can be completely prevented.
【図1】本発明の実施の形態の超音波内視鏡の全体構成
を示す外観図である。FIG. 1 is an external view showing an overall configuration of an ultrasonic endoscope according to an embodiment of the present invention.
【図2】本発明の実施の形態の一部を断面で示す超音波
内視鏡の先端部分の平面図である。FIG. 2 is a plan view of a distal end portion of the ultrasonic endoscope showing a part of an embodiment of the present invention in a cross section.
【図3】本発明の実施の形態の一部を断面で示す超音波
内視鏡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 ultrasonic endoscope showing a part of an embodiment of the present invention in a cross section.
【図4】本発明の実施の形態の超音波内視鏡の湾曲部側
から先端側を見た状態の湾曲部の断面図である。FIG. 4 is a cross-sectional view of the bending portion of the ultrasonic endoscope according to the embodiment of the present invention, when the distal end side is viewed from the bending portion side.
【図5】本発明の実施の形態の処置具挿通チャンネルの
連結部の側面断面図である。FIG. 5 is a side sectional view of a connecting portion of the treatment tool insertion channel according to the embodiment of the present invention.
【図6】本発明の処置具挿通チャンネルの連結部の第2
の実施例の側面断面図である。FIG. 6 shows a second example of the connecting portion of the treatment tool insertion channel of the present invention.
FIG. 4 is a side sectional view of the embodiment of FIG.
【図7】本発明の処置具挿通チャンネルの連結部の第3
の実施例の側面断面図である。FIG. 7 is a third view of the connecting portion of the treatment tool insertion channel according to the present invention.
FIG. 4 is a side sectional view of the embodiment of FIG.
【図8】内視鏡の湾曲部が屈曲された状態において処置
具挿通チャンネルに穿刺具が挿脱される状態の側面略示
図である。FIG. 8 is a schematic side view showing a state where a puncture device is inserted into and removed from the treatment instrument insertion channel in a state where the bending portion of the endoscope is bent.
【符号の説明】 1 挿入部 2 湾曲部 11 処置具挿通チャンネル 11a 超弾性金属パイプ部 11b 可撓管チューブ部 11d 連結部[Description of Signs] 1 Insertion section 2 Bending section 11 Treatment instrument insertion channel 11a Superelastic metal pipe section 11b Flexible tube section 11d Connecting section
Claims (4)
部分に設けられた内視鏡の挿入部内に全長にわたって挿
通配置された内視鏡の処置具挿通チャンネルにおいて、
少なくとも上記湾曲部内に位置する部分を超弾性金属製
のパイプによって形成したことを特徴とする内視鏡の処
置具挿通チャンネル。1. A treatment tool insertion channel for an endoscope, wherein a bending portion which is bendable by remote control is inserted through the entire length into an insertion portion of the endoscope provided at a distal end portion thereof.
A treatment instrument insertion channel for an endoscope, wherein at least a portion located in the curved portion is formed by a superelastic metal pipe.
いて可撓性チューブと連結されている請求項1記載の内
視鏡の処置具挿通チャンネル。2. The treatment tool insertion channel for an endoscope according to claim 1, wherein the superelastic metal pipe is connected to a flexible tube outside the bending portion.
いて、上記可撓性チューブの外周に補強部材が螺旋状に
巻回されている請求項2記載の内視鏡の処置具挿通チャ
ンネル。3. The treatment tool insertion channel for an endoscope according to claim 2, wherein a reinforcing member is spirally wound around the outer periphery of the flexible tube in the vicinity of a connection portion with the superelastic metal pipe.
ーブの外径寸法を越えない外径寸法で上記可撓性チュー
ブの内径より太い内径に形成されている請求項2又は3
記載の内視鏡の処置具挿通チャンネル。4. The superelastic metal pipe is formed with an outer diameter not exceeding the outer diameter of the flexible tube and an inner diameter larger than the inner diameter of the flexible tube.
The treatment tool insertion channel of the endoscope according to the above.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10054632A JPH11244223A (en) | 1998-03-06 | 1998-03-06 | Treating tool inserting channel of endoscope |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10054632A JPH11244223A (en) | 1998-03-06 | 1998-03-06 | Treating tool inserting channel of endoscope |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH11244223A true JPH11244223A (en) | 1999-09-14 |
Family
ID=12976145
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP10054632A Withdrawn JPH11244223A (en) | 1998-03-06 | 1998-03-06 | Treating tool inserting channel of endoscope |
Country Status (1)
Country | Link |
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JP (1) | JPH11244223A (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001346797A (en) * | 2000-06-12 | 2001-12-18 | Olympus Optical Co Ltd | Ultrasonic endoscope |
JP2002306404A (en) * | 2001-04-19 | 2002-10-22 | Asahi Optical Co Ltd | Built-in article protecting structure of endoscope |
EP1769722A3 (en) * | 2005-09-28 | 2008-10-15 | Olympus Medical Systems Corp. | Endoscope system comprising endoscope to which medical instrument is attached |
WO2015190188A1 (en) * | 2014-06-10 | 2015-12-17 | オリンパス株式会社 | Biopsy system |
WO2016199478A1 (en) * | 2015-06-10 | 2016-12-15 | オリンパス株式会社 | Endoscope |
JP2018134276A (en) * | 2017-02-22 | 2018-08-30 | 富士フイルム株式会社 | Treatment instrument channel and endoscope |
JP2019516480A (en) * | 2016-06-02 | 2019-06-20 | ジャイラス エーシーエムアイ インク | Endoscope Working Channel Protection |
-
1998
- 1998-03-06 JP JP10054632A patent/JPH11244223A/en not_active Withdrawn
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001346797A (en) * | 2000-06-12 | 2001-12-18 | Olympus Optical Co Ltd | Ultrasonic endoscope |
JP2002306404A (en) * | 2001-04-19 | 2002-10-22 | Asahi Optical Co Ltd | Built-in article protecting structure of endoscope |
EP1769722A3 (en) * | 2005-09-28 | 2008-10-15 | Olympus Medical Systems Corp. | Endoscope system comprising endoscope to which medical instrument is attached |
US7998058B2 (en) | 2005-09-28 | 2011-08-16 | Olympus Medical Systems Corporation | Endoscope system comprising endoscope to which medical instrument is attached |
WO2015190188A1 (en) * | 2014-06-10 | 2015-12-17 | オリンパス株式会社 | Biopsy system |
JP5953441B2 (en) * | 2014-06-10 | 2016-07-20 | オリンパス株式会社 | Biopsy system |
WO2016199478A1 (en) * | 2015-06-10 | 2016-12-15 | オリンパス株式会社 | Endoscope |
JP2019516480A (en) * | 2016-06-02 | 2019-06-20 | ジャイラス エーシーエムアイ インク | Endoscope Working Channel Protection |
US11213190B2 (en) | 2016-06-02 | 2022-01-04 | Gyrus Acmi, Inc. | Endoscope working channel protection |
JP2018134276A (en) * | 2017-02-22 | 2018-08-30 | 富士フイルム株式会社 | Treatment instrument channel and endoscope |
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