JP4190193B2 - Coating method of antifouling sheath for insertion part of endoscope - Google Patents

Coating method of antifouling sheath for insertion part of endoscope Download PDF

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Publication number
JP4190193B2
JP4190193B2 JP2002060138A JP2002060138A JP4190193B2 JP 4190193 B2 JP4190193 B2 JP 4190193B2 JP 2002060138 A JP2002060138 A JP 2002060138A JP 2002060138 A JP2002060138 A JP 2002060138A JP 4190193 B2 JP4190193 B2 JP 4190193B2
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Prior art keywords
insertion portion
sheath
contamination
endoscope
contamination prevention
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JP2003250749A (en
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和之 山本
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Hoya Corp
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Hoya Corp
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Description

【０００１】
【発明の属する技術分野】
この発明は、内視鏡使用時に挿入部を外部環境から絶縁するための内視鏡の挿入部に対する汚染防止シースの被覆方法に関する。
【０００２】
【従来の技術】
内視鏡を介して患者から患者への感染が起きないようにするためには、内視鏡使用時に挿入部に柔軟な材料からなる汚染防止シースを被覆する必要がある。
【０００３】
そこで、例えば図１７に示されるように、内視鏡の挿入部１１に被覆する前に汚染防止シース１の口元部分をロール状に丸め込んでおき、そのロール状部分１ｒを転がすようにして挿入部１１に被覆するものがある。
【０００４】
しかし、汚染防止シース１の口元部分をそのようにロール状に丸め込むことができるのは、内視鏡の挿入部１１が非常に短い場合にのみ可能であり、直径が１ｃｍ程度で長さが１〜２ｍに達する一般的な内視鏡の挿入部１１への適用は難しい。
【０００５】
そこで従来は、汚染防止シース１内に高圧空気を送り込んで、汚染防止シース１を膨らませた状態にして挿入部１１に被覆するようにしていた。
【０００６】
【発明が解決しようとする課題】
しかし、挿入部１１への被覆作業時に高圧空気を送り込んで汚染防止シース１を膨らませるようにすると、そのための設備が必要となって取り扱いが面倒になるだけでなく、空気圧によって汚染防止シース１が破裂してしまったり、取り外し時に汚染防止シース１にピンホール等が発生している場合には、汚染された状態の汚染防止シース１を挿入部１１から取り外せなくなってしまう等の問題が生じていた。
【０００７】
そこで本発明は、内視鏡の挿入部への被覆作業を簡便な構造で容易に行うことができる内視鏡の挿入部に対する汚染防止シースの被覆方法を提供することを目的とする。
【０００８】
【課題を解決するための手段】
上記の目的を達成するため、本発明の内視鏡の挿入部に対する汚染防止シースの被覆方法は、内視鏡使用時に内視鏡の挿入部を外部環境から絶縁するために、挿入部に被脱自在な柔軟で弾力性のある材料からなる汚染防止シースを挿入部に被覆するための内視鏡の挿入部に対する汚染防止シースの被覆方法において、汚染防止シースの内径寸法を挿入部の外径寸法より大きく形成して、汚染防止シースを、挿入部に被覆する前に軸線方向に押し潰して蛇腹状に折り畳んでから、軸線方向に引き伸ばしながら挿入部に被覆するようにしたものである。
【０００９】
なお、内視鏡の挿入部の基端付近に係脱自在な係合口金が汚染防止シースの基端開口部側に取り付けられていて、係合口金を挿入部の基端付近に係止することにより汚染防止シースが軸線方向に引き伸ばされるようにすれば、汚染防止シースにたるみができないので使い易く、汚染防止シースが軸線方向に引き伸ばされて縮径し、挿入部の外面に密着するようにすればよりスムーズに使用することができる。
【００１０】
また、汚染防止シース内に軸線方向に沿って配置されたチャンネルチューブの先端が汚染防止シースの先端に固着されて基端が汚染防止シースの基端開口側から延出すると共に、チャンネルチューブを挿通するためのガイドチャンネルが挿入部に形成されたものでは、ガイドチャンネル内を通過させたチャンネルチューブを基端側から引っ張って汚染防止シースを挿入部に被覆することにより、スムーズに被覆することができる。
【００１１】
【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２は、内視鏡を示しており、可撓管状の挿入部１１の基端に操作部１２が連結されている。挿入部１１の長さは、例えば１〜２メートル程度である。
【００１２】
挿入部１１内には、後述するチャンネルチューブ４を案内挿通するためのガイドチャンネル１３が全長にわたって挿通配置されていて、その先端開口１３ａは挿入部１１の先端面に配置され、基端開口１３ｂは操作部１２の下部から斜め上方に向けて突出配置されている。
【００１３】
挿入部１１と操作部１２との連結部付近には、後述する汚染防止シース１の係合口金３に形成された係合爪３ａが係脱自在な係合溝１４が形成されている。ただし、係合溝１４は必ずしも溝状でなくても差し支えない。
【００１４】
図３は、内視鏡使用時に挿入部１１を外部環境から絶縁するために、挿入部１１に被脱自在な汚染防止シース１を示しており、柔軟で弾力性のある例えば薄いシリコンゴム等によって円筒状に形成されている。
【００１５】
この汚染防止シース１の内径寸法は、内視鏡の挿入部１１の外径寸法より僅かに（例えば十分の数ミリメートル程度）大きく形成されていて、その先端は透明な部材からなる先端キャップ２によって封止されている。
【００１６】
汚染防止シース１の基端に取り付けられた短筒状の係合口金３には、前述の係合溝１４に対して係脱自在な係合爪３ａが内方に向けて突出して形成されており、図４に示されるように係合爪３ａを係合溝１４に係合させることによって、係合口金３を挿入部１１の基端付近に係止することができる。
【００１７】
図３に戻って、汚染防止シース１内には軸線方向に沿って例えば複数の通路が並列に形成されたマルチルーメンチューブからなるチャンネルチューブ４が全長にわたって挿通配置されている。チャンネルチューブ４の先端は先端キャップ２に固着されてその外面に開口しており、基端寄りの部分４ａは係合口金３側から外方に延出している。
【００１８】
このチャンネルチューブ４は内視鏡のガイドチャンネル１３内に挿脱自在であり、ガイドチャンネル１３内を貫通する状態に挿通させてさらに基端寄りの部分４ａをガイドチャンネル１３の基端開口１３ｂから引き出すことができるように、ガイドチャンネル１３に比べて十分に長く形成されている。
【００１９】
このように構成された汚染防止シース１を挿入部１１に被覆する際には、被覆前に、図５に示されるように、まず汚染防止シース１を軸線方向に押し潰して蛇腹状に折り畳んだ状態にする。以下、そのようにして折り畳まれた部分を「折り畳み部１ａ」という。
【００２０】
そして、図６に示されるように、チャンネルチューブ４を基端側からガイドチャンネル１３の先端開口１３ａ内に差し込んで、図７に示されるように、基端寄りの部分４ａをガイドチャンネル１３の基端開口１３ｂ側から引き出す。
【００２１】
次いで、図１に示されるように、係合口金３を把持して挿入部１１に沿って操作部１２寄りの方向に引き上げる。それによって、汚染防止シース１の折り畳み部１ａが基端側から引き伸ばされて、汚染防止シース１が円筒状に戻されながら挿入部１１に被覆されていく。汚染防止シース１の内径寸法が挿入部１１の外径寸法より大きいので、この作業は引っ掛かり等が生じることなくスムーズに行われる。
【００２２】
図８に示されるように係合口金３が挿入部１１の基端近傍まで引き上げられたら、図９に示されるように、ガイドチャンネル１３の基端開口１３ｂから延出しているチャンネルチューブ４の基端寄りの部分４ａを引っ張る。それによって、先端キャップ２が挿入部１１の先端に近づく方向に引き寄せられる。
【００２３】
そのようにして、先端キャップ２が挿入部１１の先端部分に当接する状態になったら、図１０に示されるように、係合口金３を係合溝１４に係止することにより、汚染防止シース１が挿入部１１を被覆する状態に固定される。そのときに、汚染防止シース１が引き伸ばされて縮径することにより挿入部１１の外面に密着するように寸法設定をしておくと、汚染防止シース１が全くだぶつかずに使い易い状態になる。
【００２４】
そして最後に、図１１に示されるように、チャンネルチューブ４の基端を、図示されていない送気送水チューブや吸引チューブ等と分岐接続部材２１，２２等を介して接続し、操作部１２を操作部カバー５で被覆することにより内視鏡が使用状態になる。
【００２５】
内視鏡使用後には、逆の手順で、操作部カバー５や分岐接続部材２１，２２等を取り外すと共に、係合口金３と係合溝１４との係合を解除してから、図１２に示されるように、先端キャップ２を摘んで前方に引っ張ることによって、汚染防止シース１がチャンネルチューブ４と共に挿入部１１から引き離され、図１３に示されるように挿入部１１から分離される。
【００２６】
なお、本発明は上記実施例に限定されるものではなく、例えば図１４に示されるように、汚染防止シース１を挿入部１１に被覆する作業において、ガイドチャンネル１３の基端開口１３ｂから延出するチャンネルチューブ４の基端寄りの部分４ａを手で引っ張る前に、係合口金３を係合溝１４に係止しても差し支えない。
【００２７】
そのようにすると、汚染防止シース１が引き伸ばされて縮径され、汚染防止シース１の先寄りの部分が挿入部１１に被覆されないが、その状態から、図１５に示されるようにチャンネルチューブ４の基端寄りの部分４ａを引っ張ることにより、図１６に示されるように汚染防止シース１が先側で膨らんで先端キャップ２が挿入部１１の先端に近づく方向に寄せられて、汚染防止シース１が挿入部１１にピッタリと被覆された状態になる。
【００２８】
【発明の効果】
本発明によれば、汚染防止シースの内径寸法を挿入部の外径寸法より大きく形成して、汚染防止シースを挿入部に被覆する前に軸線方向に押し潰して蛇腹状に折り畳んでから、汚染防止シースを軸線方向に引き伸ばしながら挿入部に被覆するようにしたことにより、特別な構造を採用することなく、内視鏡の挿入部に対する汚染防止シースの被覆作業を極めて容易に行うことができる。
【図面の簡単な説明】
【図１】本発明の内視鏡の挿入部に対する汚染防止シースの被覆方法の第１の実施例の被覆作業の説明図である。
【図２】本発明の内視鏡の挿入部に対する汚染防止シースの被覆方法の実施例に用いられる内視鏡の外観斜視図である。
【図３】本発明の内視鏡の挿入部に対する汚染防止シースの被覆方法の実施例に用いられる汚染防止シースの外観斜視図である。
【図４】本発明の内視鏡の挿入部に対する汚染防止シースの被覆方法の実施例に用いられる汚染防止シースと内視鏡との係止部の半断面図である。
【図５】本発明の内視鏡の挿入部に対する汚染防止シースの被覆方法の第１の実施例の被覆作業の説明図である。
【図６】本発明の内視鏡の挿入部に対する汚染防止シースの被覆方法の第１の実施例の被覆作業の説明図である。
【図７】本発明の内視鏡の挿入部に対する汚染防止シースの被覆方法の第１の実施例の被覆作業の説明図である。
【図８】本発明の内視鏡の挿入部に対する汚染防止シースの被覆方法の第１の実施例の被覆作業の説明図である。
【図９】本発明の内視鏡の挿入部に対する汚染防止シースの被覆方法の第１の実施例の被覆作業の説明図である。
【図１０】本発明の内視鏡の挿入部に対する汚染防止シースの被覆方法の第１の実施例の被覆作業の説明図である。
【図１１】本発明の内視鏡の挿入部に対する汚染防止シースの被覆方法の第１の実施例の汚染防止シース被覆後の作業の説明図である。
【図１２】本発明の内視鏡の挿入部に対する汚染防止シースの被覆方法の実施例の汚染防止シース取り外し作業の説明図である。
【図１３】本発明の内視鏡の挿入部に対する汚染防止シースの被覆方法の実施例の汚染防止シース取り外し作業の説明図である。
【図１４】本発明の内視鏡の挿入部に対する汚染防止シースの被覆方法の第２の実施例の被覆作業の説明図である。
【図１５】本発明の内視鏡の挿入部に対する汚染防止シースの被覆方法の第２の実施例の被覆作業の説明図である。
【図１６】本発明の内視鏡の挿入部に対する汚染防止シースの被覆方法の第２の実施例の被覆作業の部分拡大説明断面図である。
【図１７】従来の内視鏡の挿入部に対する汚染防止シースの被覆方法の被覆作業の説明図である。
【符号の説明】
１ 汚染防止シース
１ａ 折り畳み部
２ 先端キャップ
３ 係合口金
４ チャンネルチューブ
１１ 挿入部
１２ 操作部
１３ ガイドチャンネル
１４ 係合溝[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for coating a contamination-preventing sheath on an insertion portion of an endoscope for insulating the insertion portion from an external environment when the endoscope is used.
[0002]
[Prior art]
In order to prevent infection from patient to patient via the endoscope, it is necessary to cover the insertion portion with a contamination-preventing sheath made of a flexible material when the endoscope is used.
[0003]
Therefore, for example, as shown in FIG. 17, before covering the insertion portion 11 of the endoscope, the mouth portion of the contamination prevention sheath 1 is rolled into a roll shape, and the roll-shaped portion 1 r is rolled to insert the insertion portion. 11 has a coating.
[0004]
However, the mouth portion of the contamination-preventing sheath 1 can be rounded like that in a roll shape only when the insertion portion 11 of the endoscope is very short. The diameter is about 1 cm and the length is 1 Application to the insertion portion 11 of a general endoscope reaching ˜2 m is difficult.
[0005]
Therefore, conventionally, high-pressure air is sent into the pollution prevention sheath 1 so that the pollution prevention sheath 1 is inflated to cover the insertion portion 11.
[0006]
[Problems to be solved by the invention]
However, if the high-pressure air is sent to cover the insertion portion 11 to inflate the pollution prevention sheath 1, not only is the equipment necessary for this necessary, but the handling becomes troublesome, and the pollution prevention sheath 1 is not compressed by the air pressure. If the contamination prevention sheath 1 is ruptured or has a pinhole or the like at the time of removal, there is a problem that the contamination prevention sheath 1 in a contaminated state cannot be removed from the insertion portion 11. .
[0007]
Accordingly, an object of the present invention is to provide a method for coating a contamination-preventing sheath on an insertion portion of an endoscope, which can easily cover the insertion portion of the endoscope with a simple structure.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, according to the method of covering the insertion portion of the endoscope of the present invention with the anti-contamination sheath, the insertion portion is covered with the insertion portion in order to insulate the insertion portion of the endoscope from the external environment when the endoscope is used. In the coating method of the contamination prevention sheath for the insertion portion of the endoscope for covering the insertion portion with the contamination prevention sheath made of a detachable flexible and elastic material, the inner diameter dimension of the contamination prevention sheath is defined as the outer diameter of the insertion portion. The anti-contamination sheath is formed to be larger than the size, and is crushed in the axial direction before being covered with the insertion portion, folded in a bellows shape, and then covered with the insertion portion while being stretched in the axial direction.
[0009]
An engagable base that is detachable near the proximal end of the insertion portion of the endoscope is attached to the proximal end opening side of the contamination prevention sheath, and locks the engagement base near the proximal end of the insertion portion. If the anti-contamination sheath is stretched in the axial direction, the anti-contamination sheath will not sag, so it is easy to use, and the anti-contamination sheath is stretched in the axial direction to reduce the diameter and adhere to the outer surface of the insertion portion. If it does, it can be used more smoothly.
[0010]
In addition, the distal end of the channel tube disposed along the axial direction in the contamination prevention sheath is fixed to the distal end of the contamination prevention sheath, the proximal end extends from the proximal opening side of the contamination prevention sheath, and the channel tube is inserted. In the case where the guide channel is formed in the insertion portion, the channel tube passed through the guide channel can be covered smoothly by pulling the channel tube from the base end side and covering the insertion portion with the contamination prevention sheath. .
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to the drawings.
FIG. 2 shows an endoscope, and an operation unit 12 is connected to a proximal end of a flexible tubular insertion unit 11. The length of the insertion portion 11 is, for example, about 1 to 2 meters.
[0012]
A guide channel 13 for guiding and inserting a channel tube 4 to be described later is inserted through the insertion portion 11 over its entire length, its distal end opening 13a is disposed at the distal end surface of the insertion portion 11, and the proximal end opening 13b is It is arranged to project obliquely upward from the lower part of the operation unit 12.
[0013]
In the vicinity of the connecting portion between the insertion portion 11 and the operation portion 12, an engaging groove 14 is formed in which an engaging claw 3a formed on an engaging base 3 of the contamination prevention sheath 1 to be described later can be engaged and disengaged. However, the engaging groove 14 does not necessarily have a groove shape.
[0014]
FIG. 3 shows a contamination-preventing sheath 1 that can be removed from the insertion portion 11 in order to insulate the insertion portion 11 from the external environment when the endoscope is used, and is made of a flexible and elastic material such as thin silicon rubber. It is formed in a cylindrical shape.
[0015]
The inner diameter dimension of the contamination prevention sheath 1 is slightly larger (for example, about several millimeters) than the outer diameter dimension of the insertion portion 11 of the endoscope, and the distal end thereof is formed by a distal end cap 2 made of a transparent member. It is sealed.
[0016]
An engagement claw 3a that can be engaged with and disengaged from the engagement groove 14 is formed on the short cylindrical engagement base 3 attached to the proximal end of the contamination prevention sheath 1 so as to protrude inward. As shown in FIG. 4, by engaging the engaging claw 3 a with the engaging groove 14, the engaging base 3 can be locked near the proximal end of the insertion portion 11.
[0017]
Returning to FIG. 3, a channel tube 4 composed of a multi-lumen tube having a plurality of passages formed in parallel along the axial direction is inserted and disposed throughout the entire length of the contamination prevention sheath 1. The distal end of the channel tube 4 is fixed to the distal end cap 2 and opens to the outer surface thereof, and a portion 4a near the proximal end extends outward from the engagement base 3 side.
[0018]
The channel tube 4 can be inserted into and removed from the guide channel 13 of the endoscope. The channel tube 4 is inserted into the guide channel 13 so as to penetrate the guide channel 13 and the portion 4a closer to the base end is pulled out from the base end opening 13b of the guide channel 13. Therefore, it is formed to be sufficiently longer than the guide channel 13.
[0019]
When covering the contamination preventing sheath 1 configured in this way on the insertion portion 11, as shown in FIG. 5, the contamination preventing sheath 1 is first crushed in the axial direction and folded into a bellows shape before covering. Put it in a state. Hereinafter, the portion thus folded is referred to as a “folded portion 1a”.
[0020]
Then, as shown in FIG. 6, the channel tube 4 is inserted into the distal end opening 13a of the guide channel 13 from the base end side, and as shown in FIG. Pull out from the end opening 13b side.
[0021]
Next, as shown in FIG. 1, the engagement base 3 is gripped and pulled up along the insertion portion 11 in a direction closer to the operation portion 12. As a result, the folded portion 1a of the contamination prevention sheath 1 is extended from the proximal end side, and the contamination prevention sheath 1 is covered with the insertion portion 11 while being returned to the cylindrical shape. Since the inner diameter dimension of the contamination prevention sheath 1 is larger than the outer diameter dimension of the insertion portion 11, this operation is smoothly performed without causing a catch or the like.
[0022]
When the engaging base 3 is pulled up to the vicinity of the base end of the insertion portion 11 as shown in FIG. 8, the base of the channel tube 4 extending from the base end opening 13b of the guide channel 13 is shown as shown in FIG. Pull the end portion 4a. Thereby, the tip cap 2 is pulled in a direction approaching the tip of the insertion portion 11.
[0023]
When the distal end cap 2 comes into contact with the distal end portion of the insertion portion 11 as described above, as shown in FIG. 10, the engagement cap 3 is locked in the engagement groove 14 to thereby prevent the contamination prevention sheath. 1 is fixed to cover the insertion portion 11. At that time, if the size is set so that the contamination prevention sheath 1 is stretched and reduced in diameter so as to be in close contact with the outer surface of the insertion portion 11, the contamination prevention sheath 1 does not hit at all and becomes easy to use. .
[0024]
Finally, as shown in FIG. 11, the base end of the channel tube 4 is connected to an air / water supply tube, a suction tube, etc. (not shown) via the branch connection members 21, 22, etc. The endoscope is put into use by being covered with the operation unit cover 5.
[0025]
After using the endoscope, the operation unit cover 5 and the branch connection members 21 and 22 are removed in the reverse procedure, and the engagement between the engagement base 3 and the engagement groove 14 is released. As shown in the figure, the antifouling sheath 1 is pulled away from the insertion portion 11 together with the channel tube 4 by picking the front end cap 2 and pulling it forward, and is separated from the insertion portion 11 as shown in FIG.
[0026]
The present invention is not limited to the above-described embodiment. For example, as shown in FIG. 14, the work extends from the proximal end opening 13 b of the guide channel 13 in the operation of covering the contamination prevention sheath 1 on the insertion portion 11. The engaging base 3 may be locked to the engaging groove 14 before the portion 4a near the base end of the channel tube 4 to be pulled by hand.
[0027]
As a result, the contamination-preventing sheath 1 is stretched and reduced in diameter, and the distal portion of the contamination-preventing sheath 1 is not covered with the insertion portion 11, but from this state, as shown in FIG. By pulling the portion 4a near the proximal end, as shown in FIG. 16, the contamination-preventing sheath 1 is swollen on the front side, and the distal end cap 2 is brought closer to the distal end of the insertion portion 11, so that the contamination-preventing sheath 1 is The insertion portion 11 is perfectly covered.
[0028]
【The invention's effect】
According to the present invention, the inner diameter dimension of the contamination prevention sheath is formed larger than the outer diameter dimension of the insertion portion, and the contamination prevention sheath is crushed in the axial direction before being covered with the insertion portion and folded into a bellows shape. By covering the insertion portion while extending the prevention sheath in the axial direction, the operation of covering the contamination prevention sheath on the insertion portion of the endoscope can be performed very easily without employing a special structure.
[Brief description of the drawings]
BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is an explanatory diagram of a covering operation of a first embodiment of a method for coating a contamination-preventing sheath on an insertion portion of an endoscope according to the present invention.
FIG. 2 is an external perspective view of an endoscope used in an embodiment of a method for coating a contamination prevention sheath on an insertion portion of the endoscope of the present invention.
FIG. 3 is an external perspective view of a contamination prevention sheath used in an embodiment of a method for coating a contamination prevention sheath on the insertion portion of the endoscope of the present invention.
FIG. 4 is a half cross-sectional view of a locking portion between a contamination prevention sheath and an endoscope used in an embodiment of a method for coating a contamination prevention sheath on an insertion portion of an endoscope of the present invention.
FIG. 5 is an explanatory diagram of the covering operation of the first embodiment of the method of covering the contamination preventing sheath for the insertion portion of the endoscope according to the present invention.
FIG. 6 is an explanatory diagram of the covering operation of the first embodiment of the method of covering the contamination preventing sheath for the insertion portion of the endoscope according to the present invention.
FIG. 7 is an explanatory diagram of the covering operation of the first embodiment of the coating method of the contamination-preventing sheath for the insertion portion of the endoscope of the present invention.
FIG. 8 is an explanatory diagram of the covering operation of the first embodiment of the coating method of the contamination-preventing sheath for the insertion portion of the endoscope of the present invention.
FIG. 9 is an explanatory diagram of the covering operation of the first embodiment of the coating method of the contamination preventing sheath for the insertion portion of the endoscope of the present invention.
FIG. 10 is an explanatory diagram of the covering operation of the first embodiment of the coating method of the contamination-preventing sheath for the insertion portion of the endoscope of the present invention.
FIG. 11 is an explanatory view of the work after the contamination prevention sheath is coated in the first embodiment of the method for coating the contamination prevention sheath on the insertion portion of the endoscope of the present invention.
FIG. 12 is an explanatory diagram of the contamination prevention sheath removing operation of the embodiment of the method for coating the contamination prevention sheath on the insertion portion of the endoscope of the present invention.
FIG. 13 is an explanatory diagram of a contamination prevention sheath removing operation of an embodiment of the method for coating the contamination prevention sheath on the insertion portion of the endoscope of the present invention.
FIG. 14 is an explanatory diagram of the covering operation of the second embodiment of the method of covering the contamination preventing sheath for the insertion portion of the endoscope according to the present invention.
FIG. 15 is an explanatory diagram of the covering operation of the second embodiment of the method of covering the contamination preventing sheath for the insertion portion of the endoscope according to the present invention.
FIG. 16 is a partially enlarged cross-sectional view of the covering operation of the second embodiment of the coating method of the contamination preventing sheath for the insertion portion of the endoscope of the present invention.
FIG. 17 is an explanatory diagram of a covering operation of a method for covering a contamination prevention sheath on an insertion portion of a conventional endoscope.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Contamination prevention sheath 1a Folding part 2 Tip cap 3 Engagement base 4 Channel tube 11 Insertion part 12 Operation part 13 Guide channel 14 Engagement groove

Claims (3)

内視鏡使用時に上記内視鏡の挿入部を外部環境から絶縁するために、上記挿入部に被脱自在な柔軟で弾力性のある材料からなる汚染防止シースを上記挿入部に被覆するための内視鏡の挿入部に対する汚染防止シースの被覆方法において、
上記汚染防止シースの内径寸法が上記挿入部の外径寸法より大きく形成されていて、上記汚染防止シースを、上記挿入部に被覆する前に軸線方向に押し潰して蛇腹状に折り畳んでから、軸線方向に引き伸ばしながら上記挿入部に被覆すると共に、上記内視鏡の挿入部の基端付近に係脱自在な係合口金が上記汚染防止シースの基端開口部側に取り付けられていて、上記係合口金に形成された係合爪を、その係合爪が直接係脱できるように上記挿入部の基端付近に上記係合爪より周方向に幅広く上記挿入部の全周にわたって形成された係合溝に係止することにより、上記汚染防止シースが軸線方向に引き伸ばされて上記挿入部を被覆する状態に固定されることを特徴とする内視鏡の挿入部に対する汚染防止シースの被覆方法。In order to insulate the insertion portion of the endoscope from the external environment when the endoscope is used, the insertion portion is covered with a contamination prevention sheath made of a flexible and elastic material that is removable from the insertion portion. In the coating method of the contamination prevention sheath for the insertion portion of the endoscope,
An inner diameter dimension of the contamination prevention sheath is formed larger than an outer diameter dimension of the insertion portion, and the contamination prevention sheath is crushed in an axial direction before being covered with the insertion portion and folded into a bellows shape. The engaging portion is attached to the proximal end opening side of the contamination prevention sheath near the proximal end of the insertion portion of the endoscope. Engagement formed on the entire circumference of the insertion part is wider in the circumferential direction than the engagement claw near the base end of the insertion part so that the engagement claw can be directly engaged and disengaged. A method for coating a contamination-preventing sheath on an insertion portion of an endoscope, wherein the contamination-preventing sheath is stretched in the axial direction and fixed in a state of covering the insertion portion by engaging with a mating groove. 上記係合口金を上記挿入部の基端付近に係止することにより、上記汚染防止シースが軸線方向に引き伸ばされて縮径し、上記挿入部の外面に密着する請求項１記載の内視鏡の挿入部に対する汚染防止シースの被覆方法。The endoscope according to claim 1, wherein the antifouling sheath is stretched in the axial direction to have a reduced diameter by locking the engaging base near the proximal end of the insertion portion, and is in close contact with the outer surface of the insertion portion. A method for coating the anti-contamination sheath on the insertion portion of the lip. 上記汚染防止シース内に軸線方向に沿って配置されたチャンネルチューブの先端が上記汚染防止シースの先端に固着されて基端が上記汚染防止シースの基端開口側から延出すると共に、上記チャンネルチューブを挿通するためのガイドチャンネルが上記挿入部に形成されており、上記ガイドチャンネル内を通過させた上記チャンネルチューブを基端側から引っ張って上記汚染防止シースを上記挿入部に被覆する請求項１又は２記載の内視鏡の挿入部に対する汚染防止シースの被覆方法。The distal end of the channel tube disposed in the contamination prevention sheath along the axial direction is fixed to the distal end of the contamination prevention sheath, the proximal end extends from the proximal end opening side of the contamination prevention sheath, and the channel tube A guide channel for inserting the guide tube is formed in the insertion portion, and the contamination prevention sheath is covered on the insertion portion by pulling the channel tube passed through the guide channel from the base end side. 3. A method for coating a contamination-preventing sheath on the insertion portion of the endoscope according to 2.
JP2002060138A 2002-03-06 2002-03-06 Coating method of antifouling sheath for insertion part of endoscope Expired - Fee Related JP4190193B2 (en)

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