JPH08168464A - Apex part of endoscope - Google Patents
Apex part of endoscopeInfo
- Publication number
- JPH08168464A JPH08168464A JP6335003A JP33500394A JPH08168464A JP H08168464 A JPH08168464 A JP H08168464A JP 6335003 A JP6335003 A JP 6335003A JP 33500394 A JP33500394 A JP 33500394A JP H08168464 A JPH08168464 A JP H08168464A
- Authority
- JP
- Japan
- Prior art keywords
- snare
- treatment instrument
- processing tool
- endoscope
- treatment
- 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.)
- Granted
Links
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は内視鏡先端部、特に被観
察体内へ高周波スネア等の処置具を導入するための処置
具挿通チャンネルの出口の構成に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a distal end portion of an endoscope, and more particularly to a structure of an outlet of a treatment instrument insertion channel for introducing a treatment instrument such as a high-frequency snare into an observed body.
【０００２】[0002]
【従来の技術】内視鏡は、先端部の照射窓からの光の照
射に基づいて、観察窓から被観察体内を観察できるよう
に構成されると共に、処置具挿通チャンネルを介して処
置具を先端部から被観察体内へ導くようになっている。
この処置具としては、例えば高周波スネアがあり、この
高周波スネアによれば、特定部位、例えば十二指腸の乳
頭部の切開や、ポリープの切除等が行われる。2. Description of the Related Art An endoscope is constructed so that an inside of an object to be observed can be observed through an observation window on the basis of irradiation of light from an irradiation window at a distal end portion thereof, and a treatment tool can be inserted through a treatment tool insertion channel. The tip is guided into the body to be observed.
As this treatment tool, for example, there is a high frequency snare, and according to this high frequency snare, incision of a specific portion, for example, the papilla of the duodenum, excision of a polyp, or the like is performed.
【０００３】[0003]
【発明が解決しようとする課題】ところで、従来の内視
鏡では、被観察体内へ導出する処置具の側面方向の向き
（円周方向の位置）を規制しておらず、この処置具は自
由に回転するので、観察画像を見ながらその向きを所定
の方向に合せるようになっている。しかしながら、一部
の処置においては処置具が最初からある向きに設定され
ている方が良い場合がある。例えば、胆石等の結石除去
処置又は内視鏡的膵胆管造影（ＥＲＣＰ）の際の処置で
は、処置具である高周波スネアにより乳頭部の切開をす
る場合があり、この場合は乳頭部の位置が所定の場所に
あることから、輪状のスネア部が切開位置に対し所定の
向きに設定されていれば、切開処置を容易かつ確実に行
うことができる。従って、このような処置では、導出さ
れる処置具の側面方向の向きが所定の方向に規制される
ことにより、処置の効率が向上することになる。By the way, in the conventional endoscope, the lateral direction (circumferential position) of the treatment instrument guided into the body to be observed is not regulated, and this treatment instrument is free. Since it is rotated to, the orientation is adjusted to a predetermined direction while observing the observed image. However, in some treatments, it may be better to set the treatment tool in a certain direction from the beginning. For example, in a procedure for removing stones such as gallstones or a procedure for endoscopic pancreatic cholangiography (ERCP), the nipple may be incised by a high-frequency snare, which is a treatment tool. Since the ring-shaped snare part is set in a predetermined direction with respect to the incision position because the ring-shaped snare part is in a predetermined position, the incision treatment can be performed easily and reliably. Therefore, in such a treatment, the efficiency of the treatment is improved by restricting the lateral direction of the drawn out treatment tool to a predetermined direction.
【０００４】本発明は上記問題点に鑑みてなされたもの
であり、その目的は、処置具を導出する際にその側面方
向の向きを所定方向に規制することができる内視鏡先端
部を提供することにある。The present invention has been made in view of the above problems, and an object thereof is to provide an endoscope distal end portion which can regulate the lateral direction of a treatment tool in a predetermined direction when the treatment tool is pulled out. To do.
【０００５】[0005]
【課題を解決するための手段】上記目的を達成するため
に、第１請求項記載の発明に係る内視鏡先端部は、処置
具を先端部から導出するための処置具挿通チャンネルを
備えた内視鏡において、上記処置具挿通チャンネルの出
口に、被観察体内へ導出される上記処置具の側面方向の
向き（円周方向の位置）を規制するためのガイド手段を
設けたことを特徴とする。第２請求項記載の発明は、上
記ガイド手段を処置具の突状部を案内するガイド溝とし
たことを特徴とする。In order to achieve the above object, the endoscope distal end portion according to the invention as defined in the first aspect comprises a treatment instrument insertion channel for leading out the treatment instrument from the tip portion. In the endoscope, guide means for restricting a lateral direction (circumferential position) of the treatment instrument guided into the body to be observed is provided at the exit of the treatment instrument insertion channel. To do. The invention according to the second aspect is characterized in that the guide means is a guide groove for guiding the projecting portion of the treatment tool.
【０００６】[0006]
【作用】上記の構成によれば、例えば処置具挿通チャン
ネルの出口に、出口へ向かって幅が狭くなる先細りのガ
イド溝が形成され、このガイド溝によって処置具の突起
（突状）部、例えば高周波スネアのスネア部（輪状ワイ
ヤ）が案内され、所定の向きで被観察体内へ導出され
る。従って、この高周波スネアが結石除去処置又は内視
鏡的膵胆管造影で用いられた場合は、そのスネア部は乳
頭部の切開位置に確実に配置されるので、処置が行い易
くなる。According to the above construction, for example, a tapered guide groove whose width becomes narrower toward the outlet is formed at the outlet of the treatment instrument insertion channel, and the guide groove allows the projection (protruding) portion of the treatment instrument, for example, to be formed. The snare portion (annular wire) of the high-frequency snare is guided and guided into the body to be observed in a predetermined direction. Therefore, when this high-frequency snare is used for stone removal treatment or endoscopic pancreaticocholangiography, the snare portion is surely placed at the incision position of the papilla, which facilitates the treatment.
【０００７】[0007]
【実施例】図１及び図２には、第１実施例に係る正視型
の電子内視鏡先端部の構成が示され、図１は図２のＩ−
Ｉ線断面図、図２は正面図である。まず、図２に示され
るように、先端部１０の先端面にはライトガイドが接続
されている照射窓１１，１２、被観察体内の像を捉える
ための観察窓１４、洗浄ノズル１５、鉗子口１６が配置
される。上記照射窓１１，１２には、光源装置からの光
がライトガイドを介して供給され、上記洗浄ノズル１５
は上記観察窓１４の窓面を洗浄するためのものである。
図１に示されるように、上記観察窓１４には光学系部材
１７、プリズム１８等を介してＣＣＤ（Charge Coupled
Device）２０が接続されており、このＣＣＤ２０で撮
像された画像信号をプロセッサ装置で処理することによ
って、モニタ上に被観察体内の画像が表示される。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIGS. 1 and 2 show the structure of the front end of a stereoscopic electronic endoscope according to the first embodiment. FIG.
A sectional view taken along the line I and FIG. 2 are front views. First, as shown in FIG. 2, irradiation windows 11 and 12 to which a light guide is connected to the tip surface of the tip portion 10, an observation window 14 for capturing an image of the inside of the body to be observed, a cleaning nozzle 15, a forceps port. 16 are arranged. Light from a light source device is supplied to the irradiation windows 11 and 12 through a light guide, and the cleaning nozzle 15
Is for cleaning the window surface of the observation window 14.
As shown in FIG. 1, a CCD (Charge Coupled) is attached to the observation window 14 through an optical system member 17, a prism 18, and the like.
Device) 20 is connected, and an image inside the observed body is displayed on the monitor by processing the image signal picked up by the CCD 20 by the processor device.
【０００８】また、上記鉗子口１６は処置具挿通チャン
ネル２２に連通しており、この処置具挿通チャンネル２
２内を介して処置具は鉗子口１６から被観察体内へ導出
される。この処置具としては、図３に示されるような高
周波スネア２４があり、この高周波スネア２４は操作部
２５を操作することにより、輪状ワイヤからなるスネア
部２６を図のように突出させたり、内部へ引っ込めたり
することができる。また、上記スネア部２６に高周波電
流を流すことにより、患部等の切開、切除等を行うこと
ができる。The forceps port 16 communicates with the treatment instrument insertion channel 22. The treatment instrument insertion channel 2
The treatment tool is guided out of the forceps opening 16 into the body to be observed through the inside of the body 2. As this treatment tool, there is a high-frequency snare 24 as shown in FIG. 3, and the high-frequency snare 24 operates the operating portion 25 to cause the snare portion 26 made of a ring-shaped wire to project as shown in the figure or Can be withdrawn. Further, by applying a high-frequency current to the snare portion 26, it is possible to perform incision, excision, etc. of the affected area.
【０００９】そして、図４にも示されるように、処置具
挿通チャンネル２２の出口である鉗子口１６には、対向
する２箇所にガイド溝２８が形成される。即ち、このガ
イド溝２８は、出口へ向かう程、狭くなる溝形状とされ
ており、最先端の溝幅は処置具側の突起部、実施例では
上記スネア部２６のワイヤが通過する大きさに形成され
る。As shown in FIG. 4, the forceps port 16 which is the outlet of the treatment instrument insertion channel 22 is provided with guide grooves 28 at two opposing positions. That is, the guide groove 28 has a groove shape that becomes narrower toward the outlet, and the width of the most distal groove is such that the wire on the protrusion on the treatment instrument side, that is, the snare portion 26 in the embodiment passes. It is formed.
【００１０】第１実施例は以上の構成からなり、例えば
図３の高周波スネア２４は、図４のような状態で、処置
具挿通チャンネル２２内を通される。そして、鉗子口１
６へ達すると、この高周波スネア２４のスネア部２６の
両サイドはガイド溝２８により案内され、鉗子口１６か
ら出るときには、スネア部２６が図の横向きとなるよう
に規制される。従って、この高周波スネア２４が内視鏡
的膵胆管造影で使用されるときは、乳頭部の所定位置に
スネア部２６の輪の側面部分が配置されることになり、
切開が容易に行われる。The first embodiment is constructed as described above. For example, the high frequency snare 24 shown in FIG. 3 is passed through the treatment instrument insertion channel 22 in the state shown in FIG. And the forceps mouth 1
When reaching 6, the both sides of the snare portion 26 of the high-frequency snare 24 are guided by the guide grooves 28, and when coming out from the forceps port 16, the snare portion 26 is regulated so as to be laterally shown in the drawing. Therefore, when the high-frequency snare 24 is used for endoscopic pancreaticocholangiography, the side surface portion of the loop of the snare portion 26 is arranged at a predetermined position on the papilla,
The incision is easily made.
【００１１】なお、上記実施例では、ガイド溝２８を対
向する２箇所に設けたが、一箇所のガイド溝によって
も、同様の効果を得ることができる。In the above embodiment, the guide grooves 28 are provided at two opposite locations, but the same effect can be obtained with one guide groove.
【００１２】図５及び図６には、第２実施例の構成が示
されており、この第２実施例は側視型内視鏡に適用した
ものである。即ち、図５に示されように、内視鏡３０の
側面部に照射窓３１、観察窓３２が設けられ、処置具挿
通チャンネル３３の出口に鉗子口３４が設けられる。こ
の鉗子口３４には、起立台３５が軸３６に軸支され、こ
の起立台３５には駆動ワイヤ３７が取り付けられる。従
って、処置具挿通チャンネル３３を介して鉗子口３４ま
で導かれた処置具は起立台３５により起こされ、側面か
ら被観察体内へ導出される。そして、この鉗子口３４の
下側の内壁にガイド溝３８が設けられる。FIGS. 5 and 6 show the configuration of the second embodiment, which is applied to a side-view endoscope. That is, as shown in FIG. 5, an irradiation window 31 and an observation window 32 are provided on the side surface of the endoscope 30, and a forceps port 34 is provided at the exit of the treatment instrument insertion channel 33. A stand 35 is pivotally supported by a shaft 36 at the forceps port 34, and a drive wire 37 is attached to the stand 35. Therefore, the treatment instrument guided to the forceps opening 34 through the treatment instrument insertion channel 33 is raised by the upright stand 35 and guided out from the side surface into the observed body. A guide groove 38 is provided on the inner wall below the forceps port 34.
【００１３】即ち、図６に示されるように、ガイド溝３
８が設けられる下側の内壁は処置具挿通チャンネル３３
の連結部から側面側へ屈曲しており、この屈曲前の処置
具挿通チャンネル３３側の壁面では、ガイド溝３８は第
１実施例の場合と同様に、出口へ向かう程、細くなるよ
うに形成され、屈曲部から下側では、高周波スネア２４
のスネア部（ワイヤ）２６が通る幅に形成される。従っ
て、この第２実施例によっても、上記ガイド溝３８によ
って、高周波スネア２４の側面方向の向きを所定の向き
に規制できるという利点がある。That is, as shown in FIG. 6, the guide groove 3
The inner wall on the lower side where 8 is provided is a treatment instrument insertion channel 33.
Is bent to the side surface side from the connecting portion, and on the wall surface on the side of the treatment instrument insertion channel 33 before bending, the guide groove 38 is formed so that it becomes thinner toward the outlet, as in the case of the first embodiment. The high-frequency snare 24 is located below the bent portion.
Is formed to have a width through which the snare portion (wire) 26 of FIG. Therefore, the second embodiment also has the advantage that the guide groove 38 can regulate the lateral direction of the high-frequency snare 24 to a predetermined direction.
【００１４】上記実施例では、処置具として高周波スネ
ア２４を用い、この輪状ワイヤのスネア部２６を案内す
る例を示したが、その他の処置具ではその外周に突起部
を形成し、この突起部をガイド溝２８，３８で案内する
ようにしてもよい。In the above embodiment, the high frequency snare 24 is used as the treatment tool, and the snare portion 26 of the ring-shaped wire is guided. However, in other treatment tools, a protrusion is formed on the outer periphery of the snare portion 26 and the protrusion is formed. May be guided by the guide grooves 28 and 38.
【００１５】また、上記ガイド溝２８，３８では、処置
具の向きを規制することなく、処置具を導出することも
できる。即ち、上記高周波スネア２４の場合は、スネア
部２６を本体内へ引っ込めれば突起部をなくすことがで
き、また他の処置具においても突起部が形成されていな
い処置具を用いれば、従来と同様の使用が可能となる。In the guide grooves 28 and 38, the treatment instrument can be led out without regulating the orientation of the treatment instrument. That is, in the case of the high-frequency snare 24, the protrusion can be eliminated by retracting the snare portion 26 into the main body, and also with other treatment tools, if a treatment tool having no projection is used, it is possible to use the treatment tool of the prior art. Similar use is possible.
【００１６】[0016]
【発明の効果】以上説明したように、本発明によれば、
処置具を先端部から導出するための処置具挿通チャンネ
ルを備えた内視鏡で、上記処置具挿通チャンネルの出口
近傍に、被観察体内へ導出される上記処置具の向きを規
制するためのガイド手段、例えば処置具の突状部を案内
するガイド溝を設けたので、高周波スネア等の処置具の
側面方向の向きを規制した状態で、被観察体内へ導出す
ることができ、各種の処置具を目的位置へ配置すること
が容易となり、例えば結石除去処置又は内視鏡的膵胆管
造影では乳頭部が切開し易くなるという利点がある。As described above, according to the present invention,
An endoscope having a treatment instrument insertion channel for leading out the treatment instrument from the distal end portion, and a guide for regulating the orientation of the treatment instrument led out into the observed body in the vicinity of the exit of the treatment instrument insertion channel. Since a guide groove for guiding the projecting portion of the treatment tool, for example, the treatment tool, is provided, the treatment tool such as a high-frequency snare can be guided out into the body to be observed in a state in which the lateral direction of the treatment tool is regulated. Has an advantage that it can be easily placed at a target position, and the papilla is easily incised in, for example, a stone removing procedure or an endoscopic pancreatic cholangiography.
【図１】本発明の第１実施例に係る内視鏡先端部の構成
を示し、図２のＩ−Ｉ線の断面図である。FIG. 1 is a cross-sectional view taken along the line I-I of FIG. 2, showing a configuration of a distal end portion of an endoscope according to a first embodiment of the present invention.
【図２】図１の先端部の先端面の構成を示す図である。FIG. 2 is a diagram showing a configuration of a tip surface of a tip portion of FIG.
【図３】処置具の一つである高周波スネアの構成を示す
図である。FIG. 3 is a diagram showing a configuration of a high-frequency snare that is one of treatment tools.
【図４】図１の鉗子口の構成及び処置具挿通チャンネル
内へ通された高周波スネアの状態を示す斜視図である。4 is a perspective view showing a configuration of the forceps port of FIG. 1 and a state of a high-frequency snare passed through a treatment tool insertion channel.
【図５】第２実施例の内視鏡先端部の構成を示す側面図
である。FIG. 5 is a side view showing the configuration of the distal end portion of the endoscope of the second embodiment.
【図６】図５の鉗子口部の構成を示す斜視図である。FIG. 6 is a perspective view showing a configuration of a forceps opening portion of FIG.
１０ … 先端部、 １４，３２ … 観察窓、 １６，３４ … 鉗子口、 ２２，３３ … 処置具挿通チャンネル、 ２８，３８ … ガイド溝、 ２４ … 高周波スネア、 ２６ … スネア部。 10 ... Tip part, 14, 32 ... Observation window, 16, 34 ... Forceps mouth, 22, 33 ... Treatment tool insertion channel, 28, 38 ... Guide groove, 24 ... High frequency snare, 26 ... Snare part.
Claims (2)
具挿通チャンネルを備えた内視鏡において、上記処置具
挿通チャンネルの出口近傍に、被観察体内へ導出される
上記処置具の側面方向の向きを規制するためのガイド手
段を設けたことを特徴とする内視鏡先端部。1. An endoscope having a treatment instrument insertion channel for leading out a treatment instrument from a distal end portion, in a lateral direction of the treatment instrument led out into the body to be observed in the vicinity of an outlet of the treatment instrument insertion channel. A distal end portion of an endoscope, characterized in that guide means for regulating the orientation of the endoscope is provided.
内するガイド溝としたことを特徴とする上記第１請求項
記載の内視鏡先端部。2. The endoscope distal end portion according to claim 1, wherein the guide means is a guide groove for guiding the projecting portion of the treatment instrument.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33500394A JP3482022B2 (en) | 1994-12-19 | 1994-12-19 | Endoscope tip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33500394A JP3482022B2 (en) | 1994-12-19 | 1994-12-19 | Endoscope tip |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08168464A true JPH08168464A (en) | 1996-07-02 |
| JP3482022B2 JP3482022B2 (en) | 2003-12-22 |
Family
ID=18283655
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP33500394A Expired - Fee Related JP3482022B2 (en) | 1994-12-19 | 1994-12-19 | Endoscope tip |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3482022B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002112946A (en) * | 2000-10-11 | 2002-04-16 | Olympus Optical Co Ltd | Hood for endoscope |
| JP2011067650A (en) * | 2010-11-24 | 2011-04-07 | Olympus Corp | Hood for endoscope |
-
1994
- 1994-12-19 JP JP33500394A patent/JP3482022B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002112946A (en) * | 2000-10-11 | 2002-04-16 | Olympus Optical Co Ltd | Hood for endoscope |
| JP2011067650A (en) * | 2010-11-24 | 2011-04-07 | Olympus Corp | Hood for endoscope |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3482022B2 (en) | 2003-12-22 |
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