JP2004209137A - Distal end of side looking endoscope - Google Patents

Distal end of side looking endoscope Download PDF

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Publication number
JP2004209137A
JP2004209137A JP2003002123A JP2003002123A JP2004209137A JP 2004209137 A JP2004209137 A JP 2004209137A JP 2003002123 A JP2003002123 A JP 2003002123A JP 2003002123 A JP2003002123 A JP 2003002123A JP 2004209137 A JP2004209137 A JP 2004209137A
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Prior art keywords
catheter
distal end
raising piece
treatment instrument
treatment tool
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JP4295994B2 (en
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Shinichi Matsuno
真一 松野
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Pentax Corp
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Pentax Corp
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/00064—Constructional details of the endoscope body
    • A61B1/00071—Insertion part of the endoscope body
    • A61B1/0008—Insertion part of the endoscope body characterised by distal tip features
    • A61B1/00098—Deflecting means for inserted tools

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Abstract

<P>PROBLEM TO BE SOLVED: To provide a distal end of a side-looking endoscope, which makes the movement of the tip part of a catheter stable and can lead to a target section accurately and easily when the projecting catheter is raised. <P>SOLUTION: A catheter guiding slit 21 is formed in a cap-shaped, tip case 20 covering a distal end body 10, which controls lateral swinging, in the projecting direction, of a catheter 101 that is raised by a treatment tool raising piece 13 when the catheter 101 is inserted through a treatment tool insertion channel 2. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

【０００１】
【発明の属する技術分野】
この発明は側方視型内視鏡の先端部に関する。
【０００２】
【従来の技術】
側方視型内視鏡は一般に、図７に示されるように、挿入部１の先端に配置された先端部本体１０を囲む状態にキャップ状の先端ケース２０が固定的に取り付けられた構成になっている。
【０００３】
そして、挿入部１内に挿通配置された処置具挿通チャンネルを通って突出される処置具１００の突出方向を調整するように遠隔操作される処置具起上片１３が、先端部本体１０に可動に取り付けられている。１１は観察窓、１２は照明窓である。
【０００４】
先端ケース２０には、処置具挿通チャンネルに挿通された処置具１００の先端部分を外方に突出させる処置具突出溝２９が、処置具起上片１３の移動方向に沿って処置具起上片１３の幅より僅かに広い幅で形成されている（例えば、特許文献１）。
【０００５】
【特許文献１】
特公平３−２０２４３号公報、第４図、第９図
【０００６】
【発明が解決しようとする課題】
内視鏡用処置具の一つであるカテーテルは一般に、四フッ化エチレン樹脂チューブ等の単純な可撓性チューブによって形成されている。
【０００７】
図８は、そのようなカテーテル１０１の先端部分が側方視型内視鏡の処置具挿通チャンネルに通されて処置具突出溝２９から外方に突出される際の状態を示しており、突出の際の動作によって、カテーテル１０１の先端付近にはカーブした状態の曲がり癖が付く。
【０００８】
その結果、カテーテル１０１は処置具突出溝２９の中心線Ｘに沿うのではなく、処置具突出溝２９の側部の方に寄せられて、例えば図８に示されるような状態になる。
【０００９】
処置具起上片１３には、案内される処置具を中心線Ｘ位置に寄せるための浅いＵ状又はＶ状の案内溝１３ａが形成されている。しかし、金属コイルシース等のように腰の強くないカテーテル１０１は、余裕のある空間内ではふらつき易いため、曲がり癖の付いたカテーテル１０１は処置具起上片１３の案内溝１３ａの土手部分に載った状態になって、先端がある程度側方に首を振った状態になる場合が多い。
【００１０】
なお、処置具起上片１３の幅をカテーテル１０１の直径程度に細く形成して空間的余裕をなくしてしまえば上述のような現象はほとんど問題にならなくなるが、処置具起上片１３の幅は、カテーテル１０１が余裕をもって通過する必要がある処置具挿通チャンネルの直径に合わせなければならず、また各種の処置具をスムーズに通す必要性からも、処置具起上片１３の幅を狭く形成するのは現実的な解決方法ではない。
【００１１】
したがって、上述のように処置具起上片１３の案内溝１３ａの土手部分に載った状態のカテーテル１０１を、図７の矢印Ａに示されるように処置具起上片１３で起上させていくのであるが、カテーテル１０１は、起上するのにしたがって強く曲げられて自己の弾性により生じる反発力が大きくなり、その結果、相当な程度まで起上された時点で処置具起上片１３の案内溝１３ａの底部（即ち、中心線Ｘ位置）に滑り落ちる。
【００１２】
そのような動作は、内視鏡の観察画面中においてカテーテル１０１の先端が大きく飛び跳ねるように映し出され、カテーテル１０１の先端が目標部位の方に向く直前に突然そのようなことが起きるので、誘導操作のやり直し（そして、場合によっては飛び跳ねの再発）になり、カテーテル１０１の誘導がままならなくなってしまう場合がある。
【００１３】
そこで本発明は、内視鏡の挿入部先端から突出されたカテーテルを起上させていく際にカテーテルの先端部分の動きが安定していて、正確かつ容易に目標部位に誘導することができる側方視型内視鏡の先端部を提供することを目的とする。
【００１４】
【課題を解決するための手段】
上記の目的を達成するため、本発明の側方視型内視鏡の先端部は、挿入部の先端に配置された先端部本体を囲む状態にキャップ状の先端ケースが取り付けられ、挿入部内に挿通配置された処置具挿通チャンネルを通って突出される処置具の突出方向を調整するように遠隔操作される処置具起上片が先端部本体に可動に取り付けられた側方視型内視鏡の先端部において、処置具挿通チャンネルにカテーテルが挿通されたときに処置具起上片によって起上されるカテーテルの突出方向の横振れを規制するためのカテーテル案内スリットを、先端ケースに形成したものである。
【００１５】
なお、カテーテル案内スリットが、処置具起上片の幅より狭い幅の長溝状に処置具起上片の移動方向に沿って形成されているとよく、その場合、カテーテル案内スリットが、弾力性のある材料により形成されていて処置具起上片の移動動作に押されて弾性変形するようにしてもよい。
【００１６】
また、処置具起上片が起上状態にないときにカテーテルが通過するカテーテル通過孔が、カテーテル案内スリットより幅広に、カテーテル案内スリットと連続して先端ケースに形成されていてもよく、先端ケースが先端部本体に対して着脱自在であってもよい。
【００１７】
【発明の実施の形態】
図面を参照して本発明の実施例を説明する。
図３は側方視内視鏡の全体構成を示しており、可撓性の挿入部１の先端には、先端部本体１０が先端ケース２０で囲まれた状態に配置され、挿入部１の基端には操作部５が連結されている。
【００１８】
挿入部１内には、全長にわたって処置具挿通チャンネル２が挿通配置されていて、操作部５に配置された入口から処置具挿通チャンネル２内に処置具１００を挿入することにより、処置具１００の先端部分１００ａが挿入部１の先端から突出する。操作部５には、そのような処置具１００の先端部分１００ａの突出方向を遠隔操作によって調整するための操作レバー６が配置されている。
【００１９】
図４、図５及び図６は挿入部１の先端部分を示している。図４は斜視図、図５は分解斜視図、図６は側面断面図であり、先端部本体１０の側面部分に観察窓１１と照明窓１２が前後方向に並んで配置されている。
【００２０】
そのような観察窓１１及び照明窓１２と並んで先端部本体１０に形成された処置具起上室１４内には、処置具起上片１３が支軸１５を中心に回動自在に配置されていて、処置具挿通チャンネル２から突出される処置具（ここでは、単純な可撓性チューブからなるカテーテル１０１）が処置具起上片１３の案内溝１３ａに沿う位置関係にレイアウトされている。
【００２１】
処置具起上片１３の案内溝１３ａは、浅いＵ状又はＶ状等のように、カテーテル１０１が沿う方向の中心部分（図８の中心線Ｘ位置に相当する部分）が最も窪んだ形状に形成されている。
【００２２】
図６に示される１９は、操作部５に配置されている操作レバー６によって進退操作される操作ワイヤであり、支軸１５から離れた位置で処置具起上片１３に連結されている。
【００２３】
したがって、操作ワイヤ１９が操作レバー６によって矢印Ｂで示されるように牽引操作されると、処置具起上片１３が支軸１５を中心に回動して、処置具起上片１３に沿って案内されているカテーテル１０１が矢印Ａ方向に起上する。なお、操作ワイヤ１９を、処置具起上片１３に一体的に連結したレバー部材等に連結する構成にしても差し支えない。
【００２４】
先端ケース２０は、弾力性のあるゴム材等によってキャップ状に形成されて先端部本体１０に被嵌され、先端ケース２０の内面に突出形成された周状突起２０ａが先端部本体１０の外周面に形成された円周溝１０ａに係合することにより、先端ケース２０が先端部本体１０に固定されている。
【００２５】
そして、先端ケース２０を弾性変形させて円周溝１０ａに対する周状突起２０ａの係合を外すことにより、先端ケース２０を先端部本体１０から取り外して洗浄等を容易に行うことができ、また必要に応じて先端ケース２０を交換することができる。
【００２６】
先端ケース２０の側面部には、観察窓１１と照明窓１２を露出させるための開口部と並んで、処置具起上片１３により起上されて外方に突出される処置具を通過させるためのカテーテル案内スリット２１が、処置具起上室１４と中心線位置を合わせて長溝状に形成されている。
【００２７】
ただし、カテーテル案内スリット２１は、処置具起上片１３によって起上されるカテーテル１０１の突出方向が横振れしないように、その幅ｗが処置具起上室１４の幅Ｗより狭くてカテーテル１０１の直径と略同寸法になるように形成されている。
【００２８】
また、カテーテル案内スリット２１の前端側には、処置具起上片１３が起上状態にないときにカテーテル１０１が通過するカテーテル通過孔２２が、カテーテル案内スリット２１より幅広に形成されて、カテーテル案内スリット２１と滑らかな斜面とカーブでつながった状態に先端ケース２０に形成されている。
【００２９】
なお、カテーテル通過孔２２が形成されているのは、図６等に示される処置具起上片１３が最も倒れた状態のときにカテーテル１０１が通過する位置だけであり、その直後に隣接する位置から後方にカテーテル案内スリット２１が形成されている。
【００３０】
このように構成された実施例の側方視型内視鏡の先端部においては、カテーテル１０１を処置具挿通チャンネル２内に挿通すると、図４及び図６に示されるように、カテーテル１０１の先端部分が処置具起上片１３に案内されてカテーテル通過孔２２を通って外方に突出する。その時、カテーテル１０１の先端が多少横振れした状態になる場合もある。
【００３１】
しかし、操作ワイヤ５に配置された操作レバー６により処置具起上片１３を起上操作すると、直ちに、図１及び図２に示されるようにカテーテル１０１がカテーテル通過孔２２からカテーテル案内スリット２１内に導かれて、カテーテル１０１が処置具起上片１３の案内溝１３ａの中心線Ｘ位置に沿う状態になる。
【００３２】
したがって、処置具起上片１３による起上動作により、カテーテル１０１が目標部位の直前位置に接近する前にカテーテル案内スリット２１内に導かれて、内視鏡の観察画面中においてカテーテル１０１の先端が急激な変位をすることなく、カテーテル１０１を安定した状態で変位させて目標部位に誘導することができる。
【００３３】
そして、カテーテル案内スリット２１部分は弾力性を有しているので、カテーテル案内スリット２１の幅ｗがカテーテル１０１の直径より多少小さくてもカテーテル１０１がカテーテル案内スリット２１を弾力的に押し広げながら突出することができる。
【００３４】
また、処置具起上片１３が大きく起上動作したときに、処置具起上片１３がカテーテル案内スリット２１と干渉してカテーテル案内スリット２１を弾力的に押し広げるような構成にしても差し支えない。
【００３５】
【発明の効果】
本発明によれば、処置具挿通チャンネルにカテーテルが挿通されたときに処置具起上片によって起上されるカテーテルの突出方向の横振れを規制するためのカテーテル案内スリットを先端ケースに形成したことにより、内視鏡の挿入部先端から突出されたカテーテルを起上させていく際にカテーテルの先端部分の動きを安定させて、カテーテルを正確かつ容易に目標部位に誘導することができる。
【図面の簡単な説明】
【図１】本発明の実施例の側方視型内視鏡の先端部においてカテーテルが起上された状態の斜視図である。
【図２】本発明の実施例の側方視型内視鏡の先端部においてカテーテルが起上された状態の平面図である。
【図３】本発明の実施例の側方視型内視鏡の全体構成を示す外観図である。
【図４】本発明の実施例の側方視型内視鏡の先端部においてカテーテルが突出された状態の斜視図である。
【図５】本発明の実施例の側方視型内視鏡の先端部の分解斜視図である。
【図６】本発明の実施例の側方視型内視鏡の先端部においてカテーテルが突出された状態の側面断面図である。
【図７】従来の側方視型内視鏡の先端部においてカテーテルが突出された状態の斜視図である。
【図８】従来の側方視型内視鏡の先端部においてカテーテルが突出された状態の平面図である。
【符号の説明】
１ 挿入部
２ 処置具挿通チャンネル
１０ 先端部本体
１３ 処置具起上片
１３ａ 案内溝
１４ 処置具起上室
２０ 先端ケース
２１ カテーテル案内スリット
２２ カテーテル通過孔
１０１ カテーテル
Ｘ 中心線[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a distal end portion of a side view type endoscope.
[0002]
[Prior art]
Generally, as shown in FIG. 7, the side-viewing type endoscope has a configuration in which a cap-shaped distal case 20 is fixedly attached to a distal end main body 10 disposed at the distal end of the insertion section 1. Has become.
[0003]
Then, the treatment instrument raising piece 13 remotely operated so as to adjust the projecting direction of the treatment instrument 100 projecting through the treatment instrument insertion channel inserted and arranged in the insertion section 1 is movable to the distal end body 10. Attached to. Reference numeral 11 denotes an observation window, and 12 denotes an illumination window.
[0004]
The distal end case 20 has a treatment tool protruding groove 29 for projecting the distal end portion of the treatment tool 100 inserted through the treatment tool insertion channel outward, along with the treatment tool raising piece 13 along the moving direction of the treatment tool raising piece 13. 13 is formed with a width slightly larger than the width (for example, Patent Document 1).
[0005]
[Patent Document 1]
JP-B-3-20243, FIGS. 4 and 9 [0006]
[Problems to be solved by the invention]
A catheter, which is one of the treatment tools for an endoscope, is generally formed by a simple flexible tube such as a tetrafluoroethylene resin tube.
[0007]
FIG. 8 shows a state in which the distal end portion of such a catheter 101 is passed through the treatment tool insertion channel of the side-view type endoscope and is projected outward from the treatment tool protrusion groove 29. Due to the operation at this time, a bending habit of a curved state is formed near the distal end of the catheter 101.
[0008]
As a result, the catheter 101 is not moved along the center line X of the treatment tool protruding groove 29, but is moved toward the side of the treatment tool protruding groove 29, for example, as shown in FIG.
[0009]
The treatment instrument raising piece 13 has a shallow U-shaped or V-shaped guide groove 13a for moving the guided treatment instrument to the center line X position. However, the catheter 101 having a low rigidity, such as a metal coil sheath, tends to fluctuate in a sufficient space. In many cases, the state is such that the tip is shaking the head to the side to some extent.
[0010]
Note that if the width of the treatment instrument raising piece 13 is formed as small as the diameter of the catheter 101 so as to eliminate the space margin, the above-mentioned phenomenon hardly causes any problem. The width of the treatment instrument elevating piece 13 must be reduced in accordance with the diameter of the treatment instrument insertion channel through which the catheter 101 needs to pass with a sufficient margin, and also from the necessity of smoothly passing various treatment instruments. It is not a practical solution.
[0011]
Accordingly, the catheter 101 placed on the bank portion of the guide groove 13a of the treatment instrument raising piece 13 as described above is raised by the treatment tool raising piece 13 as shown by the arrow A in FIG. However, the catheter 101 is strongly bent as it rises, and the repulsive force generated by its own elasticity increases. As a result, when the catheter 101 is raised to a considerable extent, the guide of the treatment instrument raising piece 13 is guided. It slides down to the bottom of the groove 13a (that is, the center line X position).
[0012]
Such an operation is reflected in the observation screen of the endoscope such that the distal end of the catheter 101 jumps greatly, and such a suddenly occurs just before the distal end of the catheter 101 is directed to the target site. (And, in some cases, a recurrence of jumping), and the guidance of the catheter 101 may not be maintained.
[0013]
Therefore, the present invention is directed to a side in which the movement of the distal end portion of the catheter is stable when elevating the catheter protruding from the distal end of the insertion portion of the endoscope, and the catheter can be accurately and easily guided to a target site. An object of the present invention is to provide a distal end portion of a square vision type endoscope.
[0014]
[Means for Solving the Problems]
In order to achieve the above object, the distal end portion of the side-viewing type endoscope of the present invention has a cap-shaped distal case attached around the distal end main body disposed at the distal end of the insertion portion, and is provided inside the insertion portion. A side-view endoscope in which a treatment instrument raising piece remotely operated so as to adjust a projecting direction of a treatment instrument projected through a treatment instrument insertion channel arranged to be inserted is movably attached to a distal end body. At the distal end of the distal case, a catheter guide slit is formed in the distal case to regulate lateral deflection in the projecting direction of the catheter raised by the treatment tool raising piece when the catheter is inserted into the treatment tool insertion channel. It is.
[0015]
Note that the catheter guide slit may be formed along the moving direction of the treatment instrument raising piece in a long groove shape smaller in width than the width of the treatment instrument raising piece, in which case, the catheter guide slit may have elasticity. The treatment instrument raising piece may be elastically deformed by being pushed by the movement of the treatment instrument raising piece.
[0016]
Further, the catheter passage hole through which the catheter passes when the treatment instrument raising piece is not in the raised state may be wider than the catheter guide slit, and may be formed in the distal case continuously with the catheter guide slit. May be detachable from the tip body.
[0017]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment of the present invention will be described with reference to the drawings.
FIG. 3 shows the overall configuration of the side-viewing endoscope. At the distal end of the flexible insertion section 1, a distal end body 10 is disposed in a state surrounded by a distal end case 20, An operation unit 5 is connected to the base end.
[0018]
The treatment tool insertion channel 2 is inserted through the entire length of the insertion section 1, and the treatment tool 100 is inserted into the treatment tool insertion channel 2 from an entrance arranged in the operation section 5. The distal end portion 100a protrudes from the distal end of the insertion section 1. An operation lever 6 for adjusting the projecting direction of the distal end portion 100a of the treatment instrument 100 by remote control is disposed on the operation section 5.
[0019]
4, 5 and 6 show the distal end portion of the insertion section 1. 4 is a perspective view, FIG. 5 is an exploded perspective view, and FIG. 6 is a side cross-sectional view. An observation window 11 and an illumination window 12 are arranged side by side in a side portion of the distal end body 10 in the front-rear direction.
[0020]
In the treatment tool raising chamber 14 formed in the distal end body 10 alongside the observation window 11 and the illumination window 12, a treatment tool raising piece 13 is disposed rotatably about a support shaft 15. The treatment tool (here, the catheter 101 made of a simple flexible tube) protruding from the treatment tool insertion channel 2 is laid out in a positional relationship along the guide groove 13 a of the treatment tool raising piece 13.
[0021]
The guide groove 13a of the treatment instrument raising piece 13 has a shape such as a shallow U-shape or V-shape in which the central portion in the direction along the catheter 101 (the portion corresponding to the center line X position in FIG. 8) is the most depressed. Is formed.
[0022]
Reference numeral 19 shown in FIG. 6 denotes an operation wire which is operated by the operation lever 6 disposed on the operation unit 5 and is connected to the treatment instrument raising piece 13 at a position away from the support shaft 15.
[0023]
Therefore, when the operation wire 19 is pulled by the operation lever 6 as shown by the arrow B, the treatment instrument raising piece 13 rotates around the support shaft 15 and moves along the treatment instrument raising piece 13. The guided catheter 101 rises in the direction of arrow A. The operation wire 19 may be connected to a lever member or the like integrally connected to the treatment instrument raising piece 13.
[0024]
The distal case 20 is formed in a cap shape with a resilient rubber material or the like and is fitted to the distal end body 10. A circumferential projection 20 a formed on the inner surface of the distal case 20 is formed on the outer peripheral surface of the distal end body 10. The distal case 20 is fixed to the distal end main body 10 by engaging with the circumferential groove 10a formed in the distal end portion.
[0025]
Then, the distal case 20 is elastically deformed to disengage the circumferential projection 20a from the circumferential groove 10a, so that the distal case 20 can be detached from the distal end body 10 to easily perform cleaning and the like. The tip case 20 can be exchanged according to the condition.
[0026]
On the side surface of the end case 20, along with the openings for exposing the observation window 11 and the illumination window 12, for passing the treatment tool raised by the treatment tool raising piece 13 and protruding outward. Of the catheter guide slit 21 is formed in a long groove shape so as to align the center line position with the treatment instrument raising chamber 14.
[0027]
However, the width w of the catheter guide slit 21 is smaller than the width W of the treatment tool raising chamber 14 so that the projecting direction of the catheter 101 raised by the treatment tool raising piece 13 does not swing laterally. It is formed to have substantially the same size as the diameter.
[0028]
A catheter passage hole 22 through which the catheter 101 passes when the treatment instrument raising piece 13 is not in the raised state is formed at the front end side of the catheter guide slit 21 so as to be wider than the catheter guide slit 21. The slit 21 is formed in the front end case 20 so as to be connected to a smooth slope and a curve.
[0029]
The catheter passage hole 22 is formed only at the position where the catheter 101 passes when the treatment instrument raising piece 13 shown in FIG. A catheter guide slit 21 is formed rearward from.
[0030]
When the catheter 101 is inserted into the treatment instrument insertion channel 2 at the distal end portion of the side-viewing type endoscope of the embodiment configured as described above, as shown in FIGS. The portion is guided by the treatment instrument raising piece 13 and projects outward through the catheter passage hole 22. At that time, the distal end of the catheter 101 may be slightly swung.
[0031]
However, when the treatment instrument raising piece 13 is raised by the operation lever 6 disposed on the operation wire 5, the catheter 101 is immediately moved from the catheter passage hole 22 into the catheter guide slit 21 as shown in FIGS. And the catheter 101 is in a state along the center line X position of the guide groove 13a of the treatment instrument raising piece 13.
[0032]
Therefore, by the raising operation by the treatment tool raising piece 13, the catheter 101 is guided into the catheter guide slit 21 before approaching the position immediately before the target site, and the tip of the catheter 101 is moved in the observation screen of the endoscope. The catheter 101 can be displaced in a stable state and guided to a target site without sudden displacement.
[0033]
Since the catheter guide slit 21 has elasticity, even if the width w of the catheter guide slit 21 is slightly smaller than the diameter of the catheter 101, the catheter 101 projects while elastically pushing and expanding the catheter guide slit 21. be able to.
[0034]
Further, when the treatment instrument raising piece 13 is largely raised, the treatment instrument raising piece 13 may interfere with the catheter guide slit 21 to elastically push the catheter guide slit 21 to spread. .
[0035]
【The invention's effect】
According to the present invention, a catheter guide slit for restricting lateral deflection in the projecting direction of the catheter raised by the treatment tool raising piece when the catheter is inserted into the treatment tool insertion channel is formed in the distal end case. Accordingly, when raising the catheter protruding from the distal end of the insertion portion of the endoscope, the movement of the distal end portion of the catheter can be stabilized, and the catheter can be accurately and easily guided to the target site.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a state in which a catheter is raised at a distal end portion of a side-viewing type endoscope according to an embodiment of the present invention.
FIG. 2 is a plan view showing a state where a catheter is raised at a distal end portion of the side-viewing type endoscope according to the embodiment of the present invention.
FIG. 3 is an external view showing an overall configuration of a side-viewing type endoscope according to an embodiment of the present invention.
FIG. 4 is a perspective view showing a state in which a catheter is projected from a distal end portion of the side-viewing type endoscope according to the embodiment of the present invention.
FIG. 5 is an exploded perspective view of a distal end portion of the side view type endoscope according to the embodiment of the present invention.
FIG. 6 is a side cross-sectional view showing a state in which a catheter is protruded from a distal end portion of the side-viewing type endoscope according to the embodiment of the present invention.
FIG. 7 is a perspective view of a state in which a catheter is projected from a distal end portion of a conventional side-viewing type endoscope.
FIG. 8 is a plan view showing a state in which a catheter is protruded from a distal end portion of a conventional side-viewing type endoscope.
[Explanation of symbols]
Reference Signs List 1 insertion part 2 treatment tool insertion channel 10 distal end body 13 treatment tool raising piece 13a guide groove 14 treatment tool raising chamber 20 distal case 21 catheter guide slit 22 catheter passage hole 101 catheter X centerline

Claims (5)

挿入部の先端に配置された先端部本体を囲む状態にキャップ状の先端ケースが取り付けられ、上記挿入部内に挿通配置された処置具挿通チャンネルを通って突出される処置具の突出方向を調整するように遠隔操作される処置具起上片が上記先端部本体に可動に取り付けられた側方視型内視鏡の先端部において、
上記処置具挿通チャンネルにカテーテルが挿通されたときに上記処置具起上片によって起上される上記カテーテルの突出方向の横振れを規制するためのカテーテル案内スリットを、上記先端ケースに形成したことを特徴とする側方視型内視鏡の先端部。A cap-shaped distal case is attached so as to surround the distal end main body disposed at the distal end of the insertion portion, and adjusts the direction in which the treatment tool protrudes through the treatment tool insertion channel inserted through the insertion portion. In the distal end portion of the side-view type endoscope, the treatment instrument raising piece remotely controlled as described above is movably attached to the distal end body.
A catheter guide slit for regulating lateral deflection in the projecting direction of the catheter raised by the treatment tool raising piece when the catheter is inserted into the treatment tool insertion channel, is formed in the distal end case. The tip of a side-viewing type endoscope. 上記カテーテル案内スリットが、上記処置具起上片の幅より狭い幅の長溝状に上記処置具起上片の移動方向に沿って形成されている請求項１記載の側方視型内視鏡の先端部。2. The side-view endoscope according to claim 1, wherein the catheter guide slit is formed in a long groove shape having a width smaller than a width of the treatment instrument raising piece along a moving direction of the treatment instrument raising piece. 3. Tip. 上記カテーテル案内スリットが、弾力性のある材料により形成されていて上記処置具起上片の移動動作に押されて弾性変形する請求項２記載の側方視型内視鏡の先端部。The distal end portion of the side-viewing type endoscope according to claim 2, wherein the catheter guide slit is formed of an elastic material, and is elastically deformed by being pushed by the movement of the treatment instrument raising piece. 上記処置具起上片が起上状態にないときに上記カテーテルが通過するカテーテル通過孔が、上記カテーテル案内スリットより幅広に、上記カテーテル案内スリットと連続して上記先端ケースに形成されている請求項２又は３記載の側方視型内視鏡の先端部。The catheter passage hole through which the catheter passes when the treatment instrument raising piece is not in the raised state is wider than the catheter guide slit, and is formed in the distal end case continuously with the catheter guide slit. 4. A distal end portion of the side-viewing type endoscope according to 2 or 3. 上記先端ケースが上記先端部本体に対して着脱自在である請求項１、２、３又は４記載の側方視型内視鏡の先端部。5. The distal end of a side-viewing type endoscope according to claim 1, wherein the distal case is detachable from the distal end body.
JP2003002123A 2003-01-08 2003-01-08 The tip of a side-viewing endoscope Expired - Fee Related JP4295994B2 (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9913574B2 (en) 2009-12-18 2018-03-13 Cook Medical Technologies Llc Endoscope cap with ramp
JP2019000656A (en) * 2016-07-19 2019-01-10 Hoya株式会社 Cap for endoscope
CN110251054A (en) * 2015-08-07 2019-09-20 数字内窥镜检查有限公司 The lid and lid forming method used in the far-end of endoscope

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9913574B2 (en) 2009-12-18 2018-03-13 Cook Medical Technologies Llc Endoscope cap with ramp
CN110251054A (en) * 2015-08-07 2019-09-20 数字内窥镜检查有限公司 The lid and lid forming method used in the far-end of endoscope
CN110251054B (en) * 2015-08-07 2022-06-24 数字内窥镜检查有限公司 Cap for use at distal end of endoscope and cap forming method
JP2019000656A (en) * 2016-07-19 2019-01-10 Hoya株式会社 Cap for endoscope
JP2020062487A (en) * 2016-07-19 2020-04-23 Hoya株式会社 Cap for endoscope
US11116385B2 (en) 2016-07-19 2021-09-14 Hoya Corporation Endoscope cap

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