JP4260958B2 - End of the endoscope - Google Patents

End of the endoscope Download PDF

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Publication number
JP4260958B2
JP4260958B2 JP00083899A JP83899A JP4260958B2 JP 4260958 B2 JP4260958 B2 JP 4260958B2 JP 00083899 A JP00083899 A JP 00083899A JP 83899 A JP83899 A JP 83899A JP 4260958 B2 JP4260958 B2 JP 4260958B2
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JP
Japan
Prior art keywords
distal end
end surface
treatment instrument
endoscope
insertion channel
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 - Fee Related
Application number
JP00083899A
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Japanese (ja)
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JP2000197603A (en
Inventor
慎介 岡田
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.)
Hoya Corp
Original Assignee
Hoya Corp
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
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Priority to JP00083899A priority Critical patent/JP4260958B2/en
Publication of JP2000197603A publication Critical patent/JP2000197603A/en
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Publication of JP4260958B2 publication Critical patent/JP4260958B2/en
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  • Endoscopes (AREA)
  • Instruments For Viewing The Inside Of Hollow Bodies (AREA)

Description

【０００１】
【発明の属する技術分野】
この発明は、処置具挿通チャンネルにガイドワイヤを通して体内深部に挿入される内視鏡の先端部に関する。
【０００２】
【従来の技術】
いわゆる親子式内視鏡のベビースコープ等では、挿入部の先端部分をできるだけ細径にするために、遠隔操作によって屈曲する湾曲部が設けられていないものがあり、そのような内視鏡の場合、処置具挿通チャンネルにガイドワイヤを通して体内深部に案内する手法がとられる。
【０００３】
【発明が解決しようとする課題】
しかし、例えば図７に示されるように、十二指腸の壁面に位置するファーター氏乳頭１０１部分まで挿入されたベビースコープ９０の処置具挿通チャンネル９１にガイドワイヤ５０を通し、さらに膵胆管１００に差し込まれたガイドワイヤ５０を案内にしてベビースコープ９０を膵胆管１００内に挿入しようとする際に、ベビースコープ９０の先端面が膵胆管１００の入口壁にぶつかってスムーズに挿入できない場合が少なくない。
【０００４】
そこで本発明は、処置具挿通チャンネルに通されたガイドワイヤを案内にして、体内深部へ引っ掛かりなくスムーズに挿入することができる内視鏡の先端部を提供することを目的とする。
【０００５】
【課題を解決するための手段】
上記の目的を達成するため、本発明の内視鏡の先端部は、挿入部の先端面の中央寄りの位置に処置具挿通チャンネルの出口開口を形成して、上記挿入部の先端面を、上記処置具挿通チャンネルの出口開口部分付近が頂点となる凸面状に形成し、観察窓及び照明窓を上記処置具挿通チャンネルの出口開口より後方に配置したことを特徴とする。
【０００６】
なお、上記観察窓が、上記挿入部の先端面にすり鉢状に形成された凹み内に配置されていてもよい。また、上記挿入部には、遠隔操作によって屈曲する湾曲部が設けられていなくてもよい。
【０００７】
【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４は、ベビースコープ１０の挿入部の先端面を示している。このベビースコープ１０は、図示されていないマザースコープのガイドチャンネルに挿通して使用される内視鏡であり、いわゆる前方視型なので、挿入部の先端面に観察窓１１と照明窓１２が配置され、それらと並んで処置具挿通チャンネル１３の出口開口１３ａが配置されている。
【０００８】
図１の上半分は図４におけるＡ−Ａ断面を示し、下半分はＢ−Ｂ断面を示している。１５は、ベビースコープ１０の挿入部可撓管であり、螺旋管の外面に網状管を被覆して形成された金属製管状体１５ａの外面に、合成樹脂製の外皮１５ｂが被覆されて構成されている。
【０００９】
挿入部可撓管１５の先端には、金属又はプラスチック製の先端部本体１４が接続筒１６を介して連結されており、接続筒１６の外周面から挿入部可撓管１５側の外周面にかけて防水チューブ１７が被覆されている。
【００１０】
なお、接続筒１６と挿入部可撓管１５の金属製管状体１５ａとは半田付け等によって固着連結され、接続筒１６と先端部本体１４とは、異なる断面を示す図２に示されるように、ピン１８によって連結されている。１９は充填シール剤である。
【００１１】
図１に戻って、処置具挿通チャンネル１３の出口開口１３ａは、先端部本体１４の先端面の中央寄りの位置に形成されていて、先端部本体１４の先端面は、処置具挿通チャンネル１３の出口開口１３ａ付近が頂点となる凸面状に形成されている。なお、稜線部分は全て滑らかな曲面状に丸められている。
【００１２】
観察窓１１は、処置具挿通チャンネル１３の出口開口１３ａより後方に配置されている。観察窓１１の奥には、前方視型の対物光学系２１が先端部本体１４に内蔵され、その対物光学系２１による被写体の結像位置に、イメージガイドファイババンドル２２の像入射端が配置されている。なお、先端部本体１４を部品単体で示す図５に示されるように、観察窓１１は、先端部本体１４の先端面にすり鉢状に形成された凹み２０内に配置されている。
【００１３】
また、図４におけるＯ−Ｃ断面を示す図３に示されるように、照明窓１２も処置具挿通チャンネル１３の出口開口１３ａより後方に配置されており、照明窓１２の奥には照明用ライトガイドファイババンドルの射出端が配置されている。
【００１４】
図６は、このように構成されたベビースコープ１０が、十二指腸の壁面に位置するファーター氏乳頭１０１部分まで挿入された状態を示しており、処置具挿通チャンネル１３にガイドワイヤ５０を通し、さらに膵胆管１００に差し込まれたガイドワイヤ５０を案内にしてベビースコープ１０を膵胆管１００内に挿入しようとしている。
【００１５】
この状態においては、先端部本体１４の先端面が凸状の形状に形成されているので、ベビースコープ１０の先端面が膵胆管１００の入口壁にぶつかってもそれがほとんど抵抗にならず、挿入部可撓管１５を手元側から押すことにより、先端部本体１４が膵胆管１００内にスムーズに挿入される。
【００１６】
また、観察窓１１と照明窓１２が、凸状に形成された先端部本体１４の突端部分より後方に配置されているので、挿入の際に先端部本体１４の先端面が粘膜に当接しても視野が確保され、内視鏡画像を観察しながら安全に膵胆管１００内に挿入することができる。
【００１７】
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、遠隔操作によって屈曲自在な湾曲部が挿入部の先端部分に設けられていてもよく、また、親子式のベビースコープ以外の内視鏡に適用してもよい。
【００１８】
【発明の効果】
本発明によれば、挿入部の先端面の中央寄りの位置に処置具挿通チャンネルの出口開口を形成して、挿入部の先端面を、処置具挿通チャンネルの出口開口部分付近が頂点となる凸面状に形成し、観察窓及び照明窓を処置具挿通チャンネルの出口開口より後方に配置したことにより、処置具挿通チャンネルに通されたガイドワイヤを案内にして、内視鏡の先端部を体内深部に引っ掛かりなくスムーズに挿入することができ、観察窓を挿入部の先端面にすり鉢状に形成された凹み内に配置することにより、挿入部の先端面が粘膜に当接しても視野が確保されて、内視鏡画像を観察しながら安全に挿入することができる。さらに観察窓を挿入部の先端面にすり鉢状に形成された凹み内に配置することにより、視野確保がより確実なものになる。
【図面の簡単な説明】
【図１】本発明の実施の形態の内視鏡の先端部の図４におけるＡ−ＡとＢ−Ｂによる側面断面図である。
【図２】本発明の実施の形態の内視鏡の先端部のＡ−Ａ及びＢ−Ｂと異なる断面による側面断面図である。
【図３】本発明の実施の形態の内視鏡の先端部の図４におけるＯ−Ｃによる側面断面図である。
【図４】本発明の実施の形態の内視鏡の先端部の正面図である。
【図５】本発明の実施の形態の先端部本体の部品単体の斜視図である。
【図６】本発明の実施の形態の内視鏡の先端部の使用状態を示す略示図である。
【図７】従来の内視鏡の先端部の使用状態を示す略示図である。
【符号の説明】
１１ 観察窓
１２ 照明窓
１３ 処置具挿通チャンネル
１３ａ 出口開口
１４ 先端部本体
１５ 挿入部可撓管[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a distal end portion of an endoscope which is inserted into a deep body part through a guide wire into a treatment instrument insertion channel.
[0002]
[Prior art]
Some baby scopes of so-called parent-child endoscopes are not provided with a bending portion that can be bent by remote operation in order to make the distal end portion of the insertion portion as thin as possible. Then, a method of guiding the treatment instrument insertion channel to the deep part of the body through a guide wire is employed.
[0003]
[Problems to be solved by the invention]
However, for example, as shown in FIG. 7, the guide wire 50 is passed through the treatment instrument insertion channel 91 of the baby scope 90 inserted to the portion of the Vater's papilla 101 located on the wall of the duodenum, and further inserted into the pancreaticobiliary duct 100. When trying to insert the baby scope 90 into the pancreaticobiliary duct 100 using the guide wire 50 as a guide, there are many cases where the distal end surface of the baby scope 90 hits the entrance wall of the pancreaticobiliary duct 100 and cannot be inserted smoothly.
[0004]
Accordingly, an object of the present invention is to provide a distal end portion of an endoscope that can be smoothly inserted without being caught in a deep portion of the body using a guide wire passed through a treatment instrument insertion channel as a guide.
[0005]
[Means for Solving the Problems]
To achieve the above object, the distal end portion of the endoscope of the present invention forms an outlet opening of the treatment instrument insertion channel at a position near the center of the distal end surface of the insertion portion, and the distal end surface of the insertion portion is The exit opening portion of the treatment instrument insertion channel is formed in a convex shape having an apex, and the observation window and the illumination window are arranged behind the exit opening of the treatment instrument insertion channel.
[0006]
In addition, the said observation window may be arrange | positioned in the dent formed in the mortar shape at the front end surface of the said insertion part. Further, the insertion portion may not be provided with a bending portion that is bent by remote operation.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to the drawings.
FIG. 4 shows the distal end surface of the insertion portion of the baby scope 10. This baby scope 10 is an endoscope that is used by being inserted through a guide channel of a mother scope (not shown), and is a so-called forward-viewing type. Therefore, an observation window 11 and an illumination window 12 are arranged on the distal end surface of the insertion portion. The exit opening 13a of the treatment instrument insertion channel 13 is arranged along with them.
[0008]
The upper half of FIG. 1 shows an AA cross section in FIG. 4, and the lower half shows a BB cross section. Reference numeral 15 denotes an insertion portion flexible tube of the baby scope 10, which is configured such that the outer surface of a metal tubular body 15 a formed by covering the outer surface of the spiral tube with a mesh tube is covered with an outer skin 15 b made of synthetic resin. ing.
[0009]
A distal end main body 14 made of metal or plastic is connected to the distal end of the insertion tube flexible tube 15 via a connection tube 16, and extends from the outer peripheral surface of the connection tube 16 to the outer peripheral surface on the insertion portion flexible tube 15 side. The waterproof tube 17 is covered.
[0010]
The connection tube 16 and the metal tubular body 15a of the insertion portion flexible tube 15 are fixedly connected by soldering or the like, and the connection tube 16 and the tip body 14 are shown in FIG. Are connected by pins 18. 19 is a filling sealant.
[0011]
Returning to FIG. 1, the outlet opening 13 a of the treatment instrument insertion channel 13 is formed at a position near the center of the distal end surface of the distal end portion main body 14, and the distal end surface of the distal end portion main body 14 is connected to the treatment instrument insertion channel 13. The vicinity of the outlet opening 13a is formed in a convex shape having a vertex. Note that the ridge lines are all rounded into a smooth curved surface.
[0012]
The observation window 11 is arranged behind the outlet opening 13 a of the treatment instrument insertion channel 13. A forward-viewing objective optical system 21 is built in the distal end main body 14 at the back of the observation window 11, and an image incident end of the image guide fiber bundle 22 is disposed at a subject imaging position by the objective optical system 21. ing. As shown in FIG. 5 in which the tip body 14 is shown as a single component, the observation window 11 is disposed in a dent 20 formed in a mortar shape on the tip surface of the tip body 14.
[0013]
Further, as shown in FIG. 3 showing a cross section taken along the line O-C in FIG. 4, the illumination window 12 is also arranged behind the outlet opening 13 a of the treatment instrument insertion channel 13. The exit end of the guide fiber bundle is arranged.
[0014]
FIG. 6 shows a state in which the baby scope 10 configured as described above is inserted up to the portion of Mr. Pharter's papilla 101 located on the wall surface of the duodenum. The guide wire 50 is passed through the treatment instrument insertion channel 13, and the pancreas The baby scope 10 is about to be inserted into the pancreaticobiliary duct 100 with the guide wire 50 inserted into the bile duct 100 as a guide.
[0015]
In this state, since the distal end surface of the distal end main body 14 is formed in a convex shape, even if the distal end surface of the baby scope 10 hits the entrance wall of the pancreaticobiliary duct 100, it hardly becomes a resistance and is inserted. The distal end main body 14 is smoothly inserted into the pancreaticobiliary duct 100 by pushing the flexible tube 15 from the proximal side.
[0016]
In addition, since the observation window 11 and the illumination window 12 are disposed behind the protruding end portion of the tip body 14 formed in a convex shape, the tip surface of the tip body 14 contacts the mucous membrane during insertion. In addition, the visual field is secured, and it can be safely inserted into the pancreaticobiliary duct 100 while observing an endoscopic image.
[0017]
The present invention is not limited to the above-described embodiment. For example, a bending portion that can be bent by remote operation may be provided at the distal end portion of the insertion portion. You may apply to an endoscope.
[0018]
【The invention's effect】
According to the present invention, the exit opening of the treatment instrument insertion channel is formed at a position near the center of the distal end surface of the insertion portion, and the distal end surface of the insertion portion is a convex surface whose apex is the vicinity of the outlet opening portion of the treatment instrument insertion channel. The distal end of the endoscope is placed deep inside the body with the guide wire passed through the treatment instrument insertion channel as a guide by arranging the observation window and the illumination window behind the outlet opening of the treatment instrument insertion channel. By inserting the observation window in a mortar-shaped recess on the distal end surface of the insertion portion, a visual field is secured even if the distal end surface of the insertion portion abuts against the mucous membrane. Thus, it can be safely inserted while observing the endoscopic image. Furthermore, the field of view can be ensured more reliably by arranging the observation window in a mortar-shaped recess formed on the distal end surface of the insertion portion.
[Brief description of the drawings]
FIG. 1 is a side cross-sectional view taken along lines AA and BB in FIG. 4 of a distal end portion of an endoscope according to an embodiment of the present invention.
FIG. 2 is a side cross-sectional view showing a cross-section different from AA and BB at the distal end portion of the endoscope according to the embodiment of the present invention.
3 is a side cross-sectional view taken along the line OC in FIG. 4 of the distal end portion of the endoscope according to the embodiment of the present invention.
FIG. 4 is a front view of the distal end portion of the endoscope according to the embodiment of the present invention.
FIG. 5 is a perspective view of a single component of the tip body of the embodiment of the present invention.
FIG. 6 is a schematic view showing a usage state of the distal end portion of the endoscope according to the embodiment of the present invention.
FIG. 7 is a schematic view showing a use state of a distal end portion of a conventional endoscope.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 11 Observation window 12 Illumination window 13 Treatment implement insertion channel 13a Exit opening 14 Tip part main body 15 Insertion part flexible tube

Claims (3)

挿入部の先端面が処置具挿通チャンネルの出口開口部分付近を頂点とする凸面状に形成されると共に、観察窓が底部に配置されたすり鉢状の凹みが上記先端面に形成され、上記処置具挿通チャンネルの出口開口が上記すり鉢状の凹みの斜面の途中の領域から上記先端面の突端付近の領域にまたがって開口していることを特徴とする内視鏡の先端部。 With the distal end surface of the insertion portion is formed convexly you an apex near the outlet opening of the treatment instrument insertion channel, the observation window is disposed at the bottom a bowl-shaped recess is formed on the distal end surface, the treatment A distal end portion of an endoscope, wherein an outlet opening of the instrument insertion channel extends from a region in the middle of the slope of the mortar-shaped recess to a region in the vicinity of the protruding end of the distal end surface. 上記挿入部の先端面の頂点より後方位置に照明窓が配置されている請求項１記載の内視鏡の先端部。 The distal end portion of the endoscope according to claim 1 , wherein an illumination window is disposed at a position behind the apex of the distal end surface of the insertion portion. 上記挿入部には、遠隔操作によって屈曲する湾曲部が設けられていない請求項１又は２記載の内視鏡の先端部。The distal end portion of the endoscope according to claim 1 or 2, wherein the insertion portion is not provided with a bending portion that is bent by remote operation.
JP00083899A 1999-01-06 1999-01-06 End of the endoscope Expired - Fee Related JP4260958B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP00083899A JP4260958B2 (en) 1999-01-06 1999-01-06 End of the endoscope

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Application Number Priority Date Filing Date Title
JP00083899A JP4260958B2 (en) 1999-01-06 1999-01-06 End of the endoscope

Publications (2)

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JP4260958B2 true JP4260958B2 (en) 2009-04-30

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Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005095582A (en) 2003-08-21 2005-04-14 Olympus Corp Hood for endoscope
JP5604247B2 (en) * 2010-09-28 2014-10-08 富士フイルム株式会社 Endoscope device
JP6591987B2 (en) 2014-09-03 2019-10-16 テルモ株式会社 Medical device

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