JP2003339631A - Endoscope insertion assisting tool - Google Patents
Endoscope insertion assisting toolInfo
- Publication number
- JP2003339631A JP2003339631A JP2002149540A JP2002149540A JP2003339631A JP 2003339631 A JP2003339631 A JP 2003339631A JP 2002149540 A JP2002149540 A JP 2002149540A JP 2002149540 A JP2002149540 A JP 2002149540A JP 2003339631 A JP2003339631 A JP 2003339631A
- Authority
- JP
- Japan
- Prior art keywords
- endoscope insertion
- endoscope
- fin
- aid
- fixing
- 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- Withdrawn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
- 238000003780 insertion Methods 0.000 title claims abstract description 383
- 230000037431 insertion Effects 0.000 title claims abstract description 383
- 230000002093 peripheral effect Effects 0.000 claims description 23
- 239000000463 material Substances 0.000 abstract description 10
- 239000013013 elastic material Substances 0.000 abstract description 2
- 229920001973 fluoroelastomer Polymers 0.000 abstract description 2
- 229920002635 polyurethane Polymers 0.000 abstract description 2
- 239000004814 polyurethane Substances 0.000 abstract description 2
- 229920002379 silicone rubber Polymers 0.000 abstract 1
- 230000000968 intestinal effect Effects 0.000 description 24
- 230000004048 modification Effects 0.000 description 18
- 238000012986 modification Methods 0.000 description 18
- 210000001599 sigmoid colon Anatomy 0.000 description 14
- 230000000694 effects Effects 0.000 description 12
- 238000005452 bending Methods 0.000 description 11
- 210000001731 descending colon Anatomy 0.000 description 10
- 238000010586 diagram Methods 0.000 description 7
- 210000001035 gastrointestinal tract Anatomy 0.000 description 6
- 229920001971 elastomer Polymers 0.000 description 5
- 210000002429 large intestine Anatomy 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000001771 impaired effect Effects 0.000 description 2
- 239000007779 soft material Substances 0.000 description 2
- 238000001356 surgical procedure Methods 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 210000001072 colon Anatomy 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000001839 endoscopy Methods 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
Classifications
-
- 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
- A61B1/00101—Insertion part of the endoscope body characterised by distal tip features the distal tip features being detachable
-
- 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
- A61B1/00131—Accessories for endoscopes
- A61B1/00137—End pieces at either end of the endoscope, e.g. caps, seals or forceps plugs
-
- 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
- A61B1/00147—Holding or positioning arrangements
- A61B1/00148—Holding or positioning arrangements using anchoring means
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Surgery (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Biomedical Technology (AREA)
- Optics & Photonics (AREA)
- Pathology (AREA)
- Radiology & Medical Imaging (AREA)
- Biophysics (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Heart & Thoracic Surgery (AREA)
- Medical Informatics (AREA)
- Molecular Biology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Endoscopes (AREA)
Abstract
Description
【発明の詳細な説明】
【０００１】
【発明の属する技術分野】本発明は、内視鏡挿入部に一
体または着脱自在に固定され、内視鏡挿入部の体腔内へ
の挿入の補助を行う内視鏡挿入補助具に関する。
【０００２】
【従来の技術】従来、手術に用いる内視鏡装置の一例と
して、内視鏡の挿入部の先端部に対物レンズ、ライトガ
イド、空気・水送り口及び吸引口を配設して形成したも
のがある。このような内視鏡装置では、ライトガイドか
ら生体組織等の被写体に光を当て、この光を当てた被写
体を対物レンズを介して視認し、空気・水送り口より送
出した空気或いは水やその他の物質を吸引口で吸引し得
るようになっている。
【０００３】ところで、例えば腸管等の湾曲のある体腔
に内視鏡を挿入する場合には、内視鏡の手元の操作部で
操作することにより内視鏡先端側の湾曲部を湾曲させな
がら体腔内に挿入して行くが、腸管は湾曲する箇所が多
いため、内視鏡先端に引っ掛かる場合が多々あり、挿入
に時間を要してしいた。
【０００４】このことに対応して、米国特許４，２０
７，８７２号に記載の内視鏡挿入補助具は、内視鏡挿入
部に装着するスリーブに弾性突起を設け、この突起に流
体を周期的に導入して外方後方に突出させ且つ該体腔を
接触させて内視鏡挿入部を前進させ、次に流体をこの突
起から排出して前記突起をスリーブ内に引き込ませてい
る。
【０００５】このような突起の動作により、前記内視鏡
挿入補助具は、湾曲する箇所が多い腸管でも容易に挿入
できるようにしている。
【０００６】
【発明が解決しようとする課題】しかしながら、米国特
許４，２０７，８７２号に記載の内視鏡挿入補助具は、
内視鏡挿入部に装着するスリーブに設けた各突起を膨張
・収縮させるための管路や、流体圧制御手段が必要であ
り、作業性が煩雑になるばかりでなく、コストが高くな
っていた。また、前記スリーブに設けた突起が突出した
ままの状態であると、内視鏡挿入部を抜去させる際、こ
の突起が例えば腸管等の体腔に引っ掛かって内視鏡が抜
けなくなる虞があるため、内視鏡挿入部を抜去する際に
は前記突起を収縮させる必要があり、そのための操作が
煩雑でわずらわしかった。
【０００７】また、内視鏡検査中に前記スリーブが徐々
に内視鏡挿入部から外れてしまうことで、挿入性や観察
・処置性が悪化する虞があった。
【０００８】本発明は、上記事情に鑑みてなされたもの
であり、操作者が特別な作業をしなくても、押し操作の
時には進みやすく、引き操作の時には抵抗が増すことで
内視鏡挿入部の位置を保持し、内視鏡挿入部の挿入性を
向上することができる内視鏡挿入補助具を提供すること
を目的とする。
【０００９】また、本発明は、操作者が特別な作業をし
なくても、押し操作の時には進みやすく、引き操作の時
には抵抗が増すことで内視鏡挿入部の位置を保持し、内
視鏡挿入部の挿入性を向上することができるとともに、
前記内視鏡を体腔内に挿入する際に患者に与える違和感
を小さくすることが可能な内視鏡挿入補助具を提供する
ことを目的とする。
【００１０】また、本発明は、操作者が特別な作業をし
なくても、押し操作の時には進みやすく、引き操作の時
には抵抗が増すことで内視鏡挿入部の位置を保持し、内
視鏡挿入部の挿入性を向上することができるとともに、
前記内視鏡挿入補助具の内視鏡挿入部への着脱性を向上
させることが可能な内視鏡挿入補助具を提供することを
目的とする。
【００１１】
【課題を解決するための手段】前記目的を達成するため
請求項１に記載の内視鏡挿入補助具は、内視鏡挿入部に
一体または着脱自在に固定される固定部と、体腔内への
挿入方向に対して斜め後方または後方に向かって突出し
た状態で前記固定部に少なくとも１つ接続される柔軟な
薄肉状のヒレ状突起部と、を具備し、前記固定部を前記
内視鏡挿入部に固定した状態でこの内視鏡挿入部を体腔
管内で引き操作するとき、前記ヒレ状突起部が体腔管壁
に当接することで、体腔管内での前記内視鏡挿入部の位
置を保持する内視鏡挿入補助具であって、前記ヒレ状突
起部の周縁部分の少なくとも一部を、前記ヒレ状突起部
が前記固定部に接続される部分の一部よりも軟性にした
ことを特徴とする。
【００１２】
【発明の実施の形態】以下、本発明の実施の形態を図面
を参照して説明する。
（第１の実施の形態）図１ないし図８は本発明の第１の
実施の形態に係り、図１は内視鏡挿入補助具を備えた内
視鏡装置を示す外観図、図２は図１の内視鏡挿入部に装
着される内視鏡挿入補助具を示す斜視図、図３は内視鏡
挿入補助具を固定部の長手中心軸で切断した場合の半断
面図、図４は図３とは別の例の内視鏡挿入補助具を固定
部の長手中心軸で切断した場合の半断面図、図５は内視
鏡挿入補助具を内視鏡挿入部に装着した様子を示す説明
図、図６乃至図８は内視鏡挿入部を大腸のＳ状結腸から
下行結腸に挿入していく様子を示す説明図である。
【００１３】（構成）図１に示すように、本発明の第１
の実施の形態に係る内視鏡装置１は、細長で可とう性の
挿入部１１を有する内視鏡２と、この内視鏡２の挿入部
１１（以下、内視鏡挿入部１１と呼ぶ）に装着される内
視鏡挿入補助具３とから主に構成される。
【００１４】前記内視鏡２は、前記内視鏡挿入部１１と
操作部１２とから主に構成される。前記内視鏡２の操作
部１２（以下、内視鏡操作部１２と呼ぶ）は、前記内視
鏡挿入部１１の基端側に連設され、把持部を兼ねてい
る。前記操作部１２の側部からはユニバーサルコード１
３が延出している。ユニバーサルコード１３の端部には
図示しないコネクタが設けられている。内視鏡２は、ユ
ニバーサルコード１３のコネクタを光源装置およびビデ
オプロセッサに接続するようになっている。
【００１５】前記内視鏡挿入部１１は、先端側から順に
先端部２１と、湾曲部２２、軟性部２３とを連設して構
成されている。
【００１６】湾曲部２２は所望の方向に湾曲自在になっ
ている。軟性部２３は、可とう性を有する柔軟な部材で
形成されている。
【００１７】前記内視鏡挿入部１１の先端部２１（以
下、挿入部先端部２１と呼ぶ）は先端カバー２４で被覆
されている。前記湾曲部２２は湾曲ゴム２５で被覆され
ている。
【００１８】前記内視鏡操作部１２には、湾曲操作ノブ
１４が設けられている。この湾曲操作ノブ１４は、回動
操作することで、前記湾曲部２２を湾曲動作させるよう
になっている。
【００１９】また、前記内視鏡挿入部１１には、前記挿
入部先端部２１と前記湾曲部２２との接続部分に、例え
ば接着剤等を盛り上げて形成した凸部２６が設けられて
いる。また、前記内視鏡挿入部１１は前記湾曲部２２と
前記軟性部２３との接続部分にも前記凸部２６と同様な
凸部２７が設けられている。
【００２０】前記内視鏡挿入補助具３は、体腔管内で前
記内視鏡挿入部１１の位置を保持するためのものであ
る。
【００２１】次に、図２を用いて前記内視鏡挿入補助具
３について詳細に説明する。図２に示すように、前記内
視鏡挿入補助具３は、固定部３１と４個のヒレ状突起部
３２とで構成されている。
【００２２】固定部３１は、円筒状に形成され、前記内
視鏡挿入部１１に装着される。４個のヒレ状突起部３２
は、柔軟で平たい薄肉形状となっており、体腔管内への
挿入方向に対して斜め後方の所定の角度で前記固定部３
１の外表面から突出している。
【００２３】ヒレ状突起部３２の材質としては、シリコ
ンゴムや、フッ素ゴムや、ポリウレタン等の任意の弾性
材料から選択可能である。また固定部３１は、ヒレ状突
起部３２と同材質で形成してもよいし、異種の弾性材料
を組み合わせて使用しても構わないばかりではなく、さ
らに、金属やプラスチック等の剛性材料を使用しても構
わない。
【００２４】これらヒレ状突起部３２は、硬性部３３と
その周縁の一部に設けた軟性部３４とから構成される。
【００２５】次に、図３を用いて内視鏡挿入補助具３の
構造について詳細に説明する。ここで図３の矢印Ａは、
前記固定部３１の長手中心軸（前記内視鏡挿入部１１の
挿入方向）に対する垂直な面において、外側から内視鏡
挿入補助具３を見ている方向を示す。図３に示すよう
に、前記内視鏡挿入補助具３は、矢印Ａ方向から見える
側の面を表面とし、前記固定部３１の長手中心軸から半
径方向に見える面を裏面とする。
【００２６】内視鏡挿入補助具３は、図１に示した前記
内視鏡挿入部１１の前記湾曲部２２に装着され、後述の
図６乃至図８で説明するように前記内視鏡挿入部１１を
体腔管内に挿入して用いられる。そして前記内視鏡挿入
補助具３は、内視鏡挿入部１１を引き操作するとき、前
記ヒレ状突起部３２が体腔管壁に当接し、図３の破線で
示すように前記ヒレ状突起部３２が捲れるように変形し
体腔管壁を当接することで、体腔管内での前記内視鏡挿
入部１１の位置を保持するようになっている。
【００２７】本実施の形態においては、前記内視鏡挿入
部１１の引き操作を行う際に前記ヒレ状突起部３２が体
腔管壁に当接する前記ヒレ状突起部３２の周縁部分に、
中心部分の硬性部３３よりも軟性の部材を配設して軟性
部３４が構成されている。
【００２８】この軟性部３４は、図３に示すように、矢
印Ａから見た場合の前記ヒレ状突起部３２の周縁部分の
みに配設してもよいし、図４に示すように半断面をとっ
た場合の周縁部分、すなわち前記ヒレ状突起部３２の表
面および裏面を覆うようにそれぞれ配設してもよい。
【００２９】（作用）第１の実施の形態では、前記内視
鏡挿入補助具３は、図５に示すように前記内視鏡挿入部
１１に装着して用いられる。
【００３０】前記内視鏡挿入部１１は、前記凸部２６と
凸部２７の間にある前記湾曲部２２の先端側に１個の前
記内視鏡挿入補助具３が装着されるようになっている。
ここで前記湾曲部２２は、略円柱状であり、略円筒状に
形成されている前記内視鏡挿入補助具３の固定部３１の
内径よりも、外径が大きく形成されている。このため前
記内視鏡挿入補助具３の固定部３１は、前記湾曲部２２
を締め付けるように装着され、装着後は簡単に外れない
ようになっている。
【００３１】また前記凸部２６は、前記内視鏡挿入補助
具３の前記内視鏡挿入部１１における軸方向の位置を定
める指標となっているとともに、固定部３１が前方へず
れることを規制している。
【００３２】そして、前記内視鏡挿入部１１に前記内視
鏡挿入補助具３を装着した前記内視鏡２は、図６に示す
ように患者の体腔内に挿入されて内視鏡検査等を行う。
【００３３】図６乃至図８は、前記内視鏡挿入部１１を
大腸のＳ状結腸４１から下行結腸４２に挿入していく様
子を示し、図６は前記内視鏡挿入部１１の挿入部先端部
２１がＳ状結腸４１途中の屈曲部に入ったところを示す
説明図、図７は図６の状態からから前記内視鏡挿入部１
１を矢印Ｂ方向に引き操作した場合の腸壁４３の挙動を
示した説明図、図８は同図７の状態から更に前記内視鏡
挿入部１１を矢印Ｂ方向に引き操作して、Ｓ状結腸４１
から下行結腸４２が略直線状になった場合の説明図であ
る。
【００３４】図６に示すように、前記内視鏡挿入部１１
の挿入部先端部２１がＳ状結腸４１途中の屈曲部に入る
までは、前記内視鏡２を操作する操作者は押し操作をし
ながら前記内視鏡挿入部１１を挿入していく。
【００３５】前記ヒレ状突起部３２は、前記固定部３１
から前記内視鏡挿入部１１の挿入方向に対して後方もし
くは斜め後方に向かって突出しており、かつ前記ヒレ状
突起部３２は柔軟な薄肉状の部材で形成されているた
め、この押し操作に際して前記ヒレ状突起部３２が体腔
管壁（図６乃至図８の場合の腸壁４３）に当接したとし
ても、前記ヒレ状突起部３２は前記内視鏡挿入部１１に
当接する方向に窄まるように容易に倒れるため、前記内
視鏡挿入部１１を押し操作する場合の抵抗は前記内視鏡
挿入補助具３を装着しない場合と比べてもほとんど増加
することなく、スムーズに挿入を行うことができる。
【００３６】操作者が、前記内視鏡挿入部１１の挿入部
先端部２１がＳ状結腸４１途中の屈曲部に入った図６の
状態からそのまま押し操作を続けても、Ｓ状結腸４１は
伸ばされてしまうために、前記内視鏡挿入部１１の挿入
部先端部２１は下行結腸４２の入り口からむしろ遠ざか
ってしまう。
【００３７】そこで操作者は、前記内視鏡挿入部１１を
押し操作するのではなく、引き操作をする。すると図７
に示すように、前記内視鏡挿入補助具３のヒレ状突起部
３２の端部は腸壁４３に当接し捲れあがるが、前記ヒレ
状突起部３１は柔軟な弾性部材で形成されているため元
の形に戻ろうとする力が腸壁４３に加わり、腸壁４３と
の摩擦が増大する。
【００３８】このように前記内視鏡挿入補助具３は、腸
壁４３に対する前記ヒレ状突起部３２の抵抗を増大させ
ることで、操作者の手元側にＳ状結腸４１の一部を図７
のように折り畳むことができる。つまり前記内視鏡挿入
補助具３は、前記内視鏡挿入部１１の引き操作によりＳ
状結腸４１を短縮化し、その短縮化された部分をヒレ状
突起部３２が保持するようになる。
【００３９】ここで、前記内視鏡挿入補助具３を装着し
ない内視鏡挿入部１１は、ヒレ状突起部３２を設けてい
ないので、Ｓ状結腸４１の短縮された状態を保持するこ
とが容易でなく、操作者が前記内視鏡挿入部１１を引き
操作したとき、前記内視鏡挿入部１１の挿入部先端部２
１側がそのままＳ状結腸４１から抜けてしまう確率が高
い。
【００４０】本実施の形態では、内視鏡挿入補助具３は
固定部３１にヒレ状突起部３２を設けているので、図７
に示すような状態を形成しやすくなっている。
【００４１】ここで、図７に示すような状態で、前記内
視鏡挿入部１１の挿入部先端部２１は下行結腸４２の入
り口に近づいてくるので、操作者は更に引き操作と湾曲
操作を行うことで、図８に示すようにＳ状結腸４１から
下行結腸４２にかけて略直線状とすることができる。そ
して操作者は前記内視鏡挿入部１１を押し操作すること
で、前記挿入部先端部２１を下行結腸４２の深部へと挿
入させることができる。
【００４２】このように、前記内視鏡挿入部１１に装着
した前記内視鏡挿入補助具３は、内視鏡挿入部１１が押
し操作により進む方向と、引き操作されて引かれる方向
とで腸壁４３に対する抵抗が大きく異なる。これによ
り、前記内視鏡挿入補助具３は、押し操作時の挿入性を
損なうことなく、腸の短縮化を容易にすることが可能と
なる。
【００４３】前記内視鏡挿入補助具３は、前記内視鏡挿
入部１１の引き操作をすると、通常最初にヒレ状突起部
３２の軟性部３４が腸壁４３に当たる。この軟性部３４
は前記ヒレ状突起部３２の中心部分の硬性部３３よりも
軟性に形成されており容易に変形するため、腸壁４３に
対する当たり方が非常に柔らかく、患者に違和感を与え
ることがない。
【００４４】ここで、前記ヒレ状突起部３２の全てを前
記軟性部３４のように軟らかく形成すると、前記ヒレ状
突起部３２の元に戻ろうとする力が弱くなり、前記内視
鏡挿入補助具３は、腸壁４３に対する前記ヒレ状突起部
３２の抵抗が弱まり、上述した効果が出にくくなる。そ
こで本実施の形態においては、前記軟性部３４が変形し
た後に、ヒレ状突起部３２の裏面が腸壁４３に当接する
状態においては、硬性部３３が腸壁４３に当接し、前記
硬性部３３が適度な弾発性を生じることで、腸壁４３を
保持することができるようにしている。
【００４５】（効果）第１の実施の形態によれば、患者
に違和感を与えることなく、内視鏡挿入部１１の押し操
作の時には進みやすく、内視鏡挿入部１１の引き操作時
に確実に腸壁４３を保持でき、前記内視鏡挿入部１１の
挿入部先端部２１が操作者の意図に反して腸管から抜け
ることなく、腸を直線化することができる。これによ
り、内視鏡挿入部の挿入性を向上することができ、内視
鏡を用いた検査や手術の操作性の向上や時間の短縮が可
能になる。
【００４６】なお、本実施の形態の内視鏡２は、内視鏡
挿入部１１の挿入部先端部２１に内蔵した図示しない撮
像装置で被検部の内視鏡像を撮像する電子内視鏡を用い
ているが、取り込んだ内視鏡像を内視鏡像操作部後端部
に設けた接眼部で観察する光学式内視鏡であってもよ
い。
【００４７】また、前記ヒレ状突起部３２に設ける前記
軟性部３４は、前記ヒレ状突起部３２の周縁を全周に渡
って配設してもよく、前記ヒレ状突起部３２の前記内視
鏡挿入部１１の挿入方向に対して後端側のみに配設して
もよく、また前記ヒレ状突起部３２の外側表面にのみ配
設してよい。要は、前記ヒレ状突起部３２と腸壁４３の
当たり方が柔らかくなるように、前記ヒレ状突起部３２
の周縁部の少なくとも一部に前記軟性部３４が配設され
ていればよい。
【００４８】また、本実施の形態では、前記内視鏡挿入
補助具３は、内視鏡挿入部１１の挿入方向に対して、前
記内視鏡挿入部１１の凸部２６の直ぐ後ろ側に着脱自在
に１個装着されるようになっているが、装着個数は２個
以上であっても構わないし、装着位置も複数の個所とし
てもよく、１個所に１ないし複数を装着しても良いし、
複数の個所にそれぞれ任意の個数を装着する形態として
ももちろん構わない。
【００４９】また、本実施の形態においては４個のヒレ
状突起部３２が前記固定部３１から突出しているが、前
記ヒレ状突起部３２の個数は任意の個数として構わな
い。
【００５０】また、ヒレ状突起部３２は、体腔管内への
挿入方向に対して斜め後方に突出するように形成した
が、体腔管内への挿入方向に対して真後ろの後方に突出
するように形成してもかまわない。
【００５１】また、内視鏡挿入補助具３は、内視鏡挿入
部１１に着脱自在に装着される形態でも、図９及び図１
０の変形例に示すように前記内視鏡挿入部１１と一体に
形成される形態でもよい。
【００５２】図９は本発明の第１の実施の形態の第１の
変形例を示す内視鏡挿入部の側面図であり、図１乃至図
８に示した実施の形態と同じ構成要素には同じ符号を付
して説明を省略している。
【００５３】図９に示すように、内視鏡挿入補助具５
は、内視鏡挿入部５１の湾曲部５２を被覆する湾曲ゴム
５５と一体に成形している。即ち、第１の変形例におい
ては、記内視鏡挿入補助具５はヒレ状突起部３２のみで
形成されている。
【００５４】このような内視鏡挿入補助具５において
も、図１乃至図８に示した第１の実施の形態と同様の効
果が得られる。
【００５５】図１０は本発明の第１の実施の形態の第２
の変形例を示す内視鏡挿入部の側面図であり、図１乃至
図８に示した実施の形態と同じ構成要素には同じ符号を
付して説明を省略している。
【００５６】図１０に示すように、内視鏡挿入補助具６
は、内視鏡挿入部６１の湾曲ゴム６５と別体に形成した
後に、内視鏡挿入部６１の挿入部先端部２１及び前記湾
曲ゴム６５にそれぞれ接着剤等を盛り上げて形成された
凸部２６および凸部６２を用いて固定している。
【００５７】このような内視鏡挿入補助具６において
も、図１乃至図８に示した実施の形態と同様の効果が得
られる。
【００５８】また、図１乃至図８に示した前記内視鏡挿
入補助具３は、挿入部先端部２１を覆うカバー（内視鏡
先端カバー）２４と一体に成形しても構わない。その場
合、前記内視鏡先端カバー２４と前記ヒレ状突起部３２
の材質は同一としてもよいし、ヒレ状突起部の材質を弾
性部材として、前記内視鏡先端カバー２４の材質に剛性
のある樹脂等を用いてもよい。
【００５９】（第２の実施の形態）図１１ないし図１６
は本発明の第２の実施の形態に係り、図１１は内視鏡挿
入補助具の斜視図、図１２は内視鏡挿入補助具が内視鏡
挿入部に装着された状態で、ヒレ状突起部の長手方向の
中心軸に対して垂直な平面で切断した断面図、図１３は
図１１に示すヒレ状突起部の１枚を拡大した第１の説明
図、図１４は図１１に示すヒレ状突起部の１枚を拡大し
た第２の説明図、図１５は前記内視鏡挿入補助具が内視
鏡挿入部に装着された状態でヒレ状突起部が内視鏡挿入
部に当接するように変形した場合の斜視図、図１６は図
１５に示した状態の内視鏡挿入部および内視鏡挿入補助
具を固定部の長手中心軸に垂直なヒレ状突起部を通る平
面で切断した場合の断面図である。
【００６０】（構成）ここで、図１乃至図８に示した第
１の実施の形態において、内視鏡挿入補助具３は、ヒレ
状突起部３２の周縁部分と中心部分の硬さに差をつける
ために、前記ヒレ状突起部３２の周縁部分に中心部分よ
りも軟らかい材質の部材を配設してたが、本第２の実施
の形態では、前記ヒレ状突起部１３２の厚さを変化させ
ることにより、中心部分と周縁部分の硬さに差をつける
ように構成している。
【００６１】図１１および図１２に示すように、前記内
視鏡挿入補助具１０３のヒレ状突起部１３２は、中心の
厚肉の硬性部１３３（中心部）と薄肉の軟性部１３４
（周縁部）から構成される。これにより、前記内視鏡挿
入補助具１０３は、前記ヒレ状突起部１３２の周縁部分
が中心部分に比べて薄肉になるように形成されている。
このヒレ状突起部１３２の薄肉の周縁部分は、その硬さ
が中心部分よりも軟らかくなるように構成されていれば
よく、その材質は中心部分の硬性部と同等の硬度ないし
は軟らかい材質であっても勿論よいし、材質自体の硬度
としては硬性部よりも硬い材質であっても、その厚さを
薄くすることで中心部分より軟性にしても構わない。
【００６２】前記ヒレ状突起部１３２の断面の構成は、
中心部分の肉厚よりも周縁部分の肉厚が薄ければよく、
厚肉部と薄肉部の関係は図１３に示すように中心部分と
周縁部分との間に段差ｔ１−ｔ２を設けて肉厚に差をつ
けてもよいし、図１４に示すように中心部分から漸次肉
厚を変化させても構わない。図１４においては、硬性部
１３３と軟性部１３４の境界は明瞭でないが、前記ヒレ
状突起部１３２の中心部分近傍に比べて周縁部分が軟性
になるように構成されていればよい。
【００６３】前記内視鏡挿入補助具１０３を内視鏡挿入
部１１に装着して体腔内へ押し操作にて挿入させる際に
は、前記内視鏡挿入補助具１０３のヒレ状突起部１３２
は体腔管壁に当接することで体腔管壁から図１２の矢印
Ｆで示される方向の外力を受けることになる。前記ヒレ
状突起部１３２は柔軟な薄肉状の部材で形成されている
ため、容易に前記内視鏡挿入部１１に当接する方向に変
形する。
【００６４】次に、図１５および図１６に示すように、
前記ヒレ状突起部１３２が前記内視鏡挿入部１１に当接
するように変形した状態について説明する。
【００６５】ここで、前記ヒレ状突起部１３２の形状
は、前記ヒレ状突起部１３２が前記内視鏡挿入部１１に
当接するように変形して隣り合うヒレ状突起部と重なっ
た時にも、重なり合った部分の前記ヒレ状突起部１３２
の肉厚の合計が中心部分の肉厚よりも厚くならないよう
な厚さおよび大きさで形成されている。図１３では、隣
り合う２枚のヒレ状突起部が前記内視鏡挿入部１１に当
接するように変形した際にも、前記ヒレ状突起部１３２
が重なり合う部分は厚さｔ２の周縁部分のみになるよう
に中心部分と周縁部分の大きさが設定されており、また
周縁部分の厚さｔ２は中心部分の厚さｔ１の半分以下に
なるように形成されている。また、図１４に示すよう
に、前記ヒレ状突起部１３２の肉厚が漸次変化する場合
でも、隣り合う２枚の前記ヒレ状突起部１３２が内視鏡
挿入部に当接するように変形した際に、前記ヒレ状突起
部１３２の重なり合う部分の肉厚の合計が、中心部分の
最大肉厚ｔ３を超えないように、前記ヒレ状突起部１３
２の大きさおよび厚さが設定されている。
【００６６】（作用）第２の実施の形態においては、前
記内視鏡挿入部１１に装着された前記内視鏡挿入補助具
１０３が体腔内への挿入時に前記内視鏡挿入部１１に当
接するように変形した際にも、前記ヒレ状突起部１３２
の薄肉部が２枚重なった部分の外径ｄ２は、前記ヒレ状
突起部１３２の中央部分における外径ｄ１もしくは前記
内視鏡挿入補助具１０３の固定部３１における外径と同
等か小さくなり、押し操作において薄肉の周縁部分重な
っても挿入性が損なわれることはない。
【００６７】また第１の実施の形態に対して、前記ヒレ
状突起部１３２に薄肉の周縁部分を設けることで、前記
ヒレ状突起部１３２の面積を増大させることができ、前
記内視鏡挿入部１１の引き操作時に腸壁と前記ヒレ状突
起部１３２が当接しやすくなる。
【００６８】（効果）このような第２の実施の形態によ
れば、第１の実施の形態の効果に加え、押し操作時の挿
入性を損なうことなく、引き操作時に前記ヒレ状突起部
１３２を腸壁に更に当接しやすくすることで内視鏡挿入
部１１の挿入部先端部２１（図１参照）が不本意に腸管
から抜けることを防ぐことができ、体腔管内への前記内
視鏡挿入部１１の挿入性を向上させる効果を得る。
【００６９】なお、薄肉部の厚さについては各ヒレ状突
起部１３２で均一としてもよいし、それぞれの薄肉部の
厚さに差をつけてもよい。要は、ヒレ状突起部１３２が
内視鏡挿入部１１に当接するように変形した際に薄肉部
の重なった部分の外径が、固定部３１もしくは厚肉の硬
性部３３の外径よりも小さくなるように薄肉部を形成す
ればよい。
【００７０】（第３の実施の形態）図１７及び図１８は
本発明の第３の実施の形態に係り、図１７は本実施の形
態に示す内視鏡挿入補助具の斜視図、図１８は内視鏡挿
入補助具を固定部の長手中心軸に対して垂直な平面で切
断した断面図である。
【００７１】図１７に示すように、本実施の形態におけ
る前記内視鏡挿入補助具２０３は、前記ヒレ状突起部３
２と前記固定部２３１が接続される部分２３５の肉厚
が、前記固定部２３１の他の部分２３６よりも厚くなる
ように形成されている。
【００７２】部分２３５は、前記固定部２３１のヒレ状
突起部３２が接続された部分から固定部２３１の長手中
心軸方向に向かって形成されている。
【００７３】図１８に示すように、固定部２３１の長手
中心軸に垂直な断面では、図中の外径ｄ３で示されてい
る４個所の部分２３５が前記ヒレ状突起部３２が接続さ
れる部分である。外径ｄ３の部分は、前記ヒレ状突起部
３２が接続されない部分２３６の外径ｄ４よりも大きく
形成されている。
【００７４】（作用）ここで、本実施の形態の説明する
ために、比較例として図１乃至図８に示した第１の実施
の形態の作用について図１９乃至図２１を用いて説明す
る。
【００７５】図１９乃至図２１は第１の実施の形態の内
視鏡挿入部に装着された内視鏡挿入補助具が腸壁等の管
腔から外力を受けたときの変形の様子を示す説明図であ
る。
【００７６】図１９に示すように、内視鏡挿入補助具３
を装着した内視鏡挿入部１１を体腔管内で図中矢印Ｃ方
向に引き操作するときには、前記内視鏡挿入補助具３の
ヒレ状突起部３２は腸壁４３等に当接することにより図
中矢印Ｇで示す方向の外力を受けることになる。
【００７７】前述したように、前記ヒレ状突起部３２は
薄肉で柔軟な弾性部材で形成されており、前記内視鏡挿
入部１１の引き操作に伴って、腸壁４３を押さえながら
変形することで、図２０に示すように前記内視鏡挿入補
助具３よりも後ろ側（矢印Ｃ側）の腸壁４３が畳まれ、
腸管が短縮される。
【００７８】しかしながら外力Ｇが過度に大きい場合
や、前記ヒレ状突起部３２の根元部近傍（固定部３１と
の接続部近傍）に外力Ｇが加わる場合等には、変形する
領域が前記ヒレ状突起部３２を超えて、前記固定部３１
から捲れ返ってしまい、図２１に示すようなヒレ状突起
部３２が挿入部先端部２１側に向けて畳まれたままの状
態となる場合があった。図２１に示す状態では、前記内
視鏡挿入補助具３は引き操作時に腸壁を押さえる効果が
なく、さらに、押し操作による挿入においても、挿入部
径が大きくなることによって挿入性が悪化する虞があっ
た。
【００７９】これに対して、図１７及び図１８に示す第
３の実施の形態では、前記内視鏡挿入補助具２０３を装
着した前記内視鏡挿入部１１を体腔管内で引き操作した
際に、前記ヒレ状突起部３２に図１９に示すような外力
Ｇが加えられても、前記内視鏡挿入補助具２０３は、前
記ヒレ状突起部３２と前記固定部２３１の接続部分が厚
肉化されており、前記固定部２３１は変形しにくい構成
となっているため、前記固定部２３１が捲れ返ってしま
うようなことがない。
【００８０】また、図１７及び図１８に示す第３の実施
の形態では、厚肉化されているのは前記ヒレ状突起部１
３２と前記固定部３１の接続部分近傍のみであるため、
体腔内に挿入される部分の外径の増加は最小限に抑えら
れており、外径増大により挿入性が著しく悪化すること
はない。
【００８１】また、前記内視鏡挿入補助具２０３は、前
記固定部２３１の内径を前記内視鏡挿入部１１の外径よ
りも小さくしており、前記内視鏡挿入部１１への装着時
には前記固定部２３１の弾性を利用して前記固定部２３
１の開口径を広げることで前記内視鏡挿入部１１に装着
し固定している。したがって、一般に前記固定部２３１
の肉厚が厚くなると、前記固定部２３１は弾性変形しに
くくなるため、厚肉化しない場合に比べ着脱性が落ちる
傾向にある。しかしながら本実施の形態においては、厚
肉化するのは前記ヒレ状突起部１３２と前記固定部２３
１の接続部分近傍のみであり、それ以外の部分の肉厚は
薄肉のままであり、容易に弾性変形させることができる
ため着脱性の劣化は最小限に抑えられている。
【００８２】また、前記固定部２３１の前記ヒレ状突起
部３２が接続される部分近傍は、前記ヒレ状突起部３２
を把持して引っ張ることができ、前記固定部２３１の他
の部分よりも大きな力が加えられるため変形させやす
い。これらより第３の実施の形態においては、前記固定
部２３１の厚肉化を行わない場合と比べても着脱性はほ
とんど劣化しない。
【００８３】また、第３の実施の形態においては、前記
ヒレ状突起部３２と前記固定部２３１の接続部の外径側
に肉盛りを行っているので、固定部の内径側には寸法変
化がないため、前記固定部２３１の内側に段差を生じな
い。
【００８４】（効果）第３の実施の形態に示す前記内視
鏡挿入補助具３は、前記内視鏡挿入部１１に装着して引
き操作を行った際にも、前記内視鏡挿入補助具３の固定
部２３１が捲れ返ってしまうことがないため、前記ヒレ
状突起部３２が腸壁を押さえる効果が失われない。また
厚肉化を行っている部位は前記固定部２３１の前記ヒレ
状突起部３２が接続される部分近傍のみであるため、挿
入性および着脱性をほとんど劣化しない。
【００８５】また、第３の実施の形態において、前記ヒ
レ状突起部３２と前記固定部２３１の接続部近傍の外径
側に肉盛りを行っているので、着脱時に前記固定部２３
１の内径側の段差が前記内視鏡挿入部１１に引っ掛かる
ことがない。
【００８６】なお、第３の実施の形態においては厚肉化
する部分を、前記固定部２３１の前記ヒレ状突起部３２
が接続される部分を含むその近傍としているが、前記ヒ
レ状突起部３２が接続される部分は薄肉として、ヒレ状
突起部が接続される部分の間の肉厚を厚肉化させても構
わない。要は、ヒレ状突起部が捲れる方向の外力を受け
たときに、固定部全体が捲れ返らないように、前記外力
に抗する厚肉部分があればよく、前記固定部２３１の前
記ヒレ状突起部３２が接続される部分の長手中心軸方向
上の近傍において、その前記固定部２３１の円周上の少
なくとも一部が厚肉化されていればよい。
【００８７】また、第３の実施の形態においては、前記
固定部２３１の体腔内への挿入方向に対して後端側に前
記ヒレ状突起部３２が接続される形態を示しているが、
前記固定部２３１の前端や、中間部に前記ヒレ状突起部
３２が接続される形態でも構わない。
【００８８】図２２及び図２３は本発明の第３の実施の
形態の第１の変形例に係り、図２２は内視鏡挿入補助具
の斜視図、図２３は図２２の前記内視鏡挿入補助具を前
記内視鏡挿入部に装着した状態で、固定部の長手中心軸
で切断した場合の断面図である。
【００８９】ここで、図１７および図１８で示した前記
内視鏡挿入補助具３が前記固定部３１の円周方向上で前
記ヒレ状突起部３２が接続される部分を厚肉化させてい
るのに対し、図２２及び図２３に示す第１の変形例で
は、内視鏡挿入補助具２０５の固定部２５１の長手中心
軸方向で前記ヒレ状突起部３２が接続される側の部分２
５５を、外側に向けて肉盛りを行うことで他の部分２５
６に比べて厚肉化させている。
【００９０】本変形例において、前記固定部２５１を厚
肉化する部分については、前記固定部２５１と前記ヒレ
状突起部３２が接続される部分のみに限らず、図２０に
示す外力Ｇを受けても前記固定部２５１が捲れないよう
になっていればよく、前記固定部２５１の前記ヒレ状突
起部３２が接続される部分近傍の任意の個所を厚肉化す
るように構成しても構わない。
【００９１】図２４は本発明の第３の実施の形態の第２
の変形例に係る内視鏡挿入補助具の断面図である。
【００９２】図１７及び図１８に示す第３の実施の形態
では、ヒレ状突起部３２と前記固定部２３１が接続され
る部分２３５を外側に向けて肉厚に形成したが、図２４
に示す本発明の第３の実施の形態の第２の変形例では、
前記図１７に示したヒレ状突起部３２と固定部２７１が
接続される部分２７５を他の部分２７６に比べて内径側
に肉盛りを行って肉厚にして形成している。固定部２７
１の部分２７５の内径は、他の部分２７６の内径に比べ
て小さくなっている。部分２７５は前記固定部２７１の
ヒレ状突起部３２が接続された部分から固定部２７１の
長手中心軸方向に向かって形成されている。
【００９３】前記ヒレ状突起部３２と前記固定部２７１
の接続部近傍の内径側に肉盛りを行った場合には、前記
内視鏡挿入部１１に前記内視鏡挿入補助具２０７を装着
した際に外表面に生じる段差を滑らかに抑えることがで
きるため、腸壁等に前記内視鏡挿入補助具２０７が当接
した場合の当たり方を柔らかくできる。また、前記ヒレ
状突起部３２を把持して引っ張ることにより前記固定部
２７１の開口部を大きく変形させることができるため、
前記固定部２７１の他の部分に比べて締め率をきつくし
ても着脱性が損なわれない。これにより、前記内視鏡挿
入部１１との固定力量を上げることができ、より脱落し
にくくなるという効果が得られる。
【００９４】図２５は本発明の第３の実施の形態の第３
の変形例に係る内視鏡挿入補助具の断面図である。
【００９５】図２２及び図２３に示す変形例では、内視
鏡挿入補助具２０５の固定部２５１の長手中心軸方向で
前記ヒレ状突起部３２が接続される側の部分２５５を、
外側に向けて肉盛りを行うことで厚肉化させているが、
図２４に示す本発明の第３の実施の形態の第２の変形例
では、内視鏡挿入補助具２０９の固定部２９５の長手中
心軸方向で前記ヒレ状突起部３２が接続される側の部分
２９５を、内側に向けて肉盛りを行うことで他の部分２
５６に比べて厚肉化させている。
【００９６】このような第３の変形例においても、前記
内視鏡挿入部１１に前記内視鏡挿入補助具２０９を装着
した際に外表面に生じる段差を滑らかに抑えることがで
きる。
【００９７】（第４の実施の形態）図２６乃至図２９は
本発明の第４の実施の形態に係り、図２６は内視鏡挿入
補助具を固定部の長手中心軸で切断した半断面図、図２
７は内視鏡挿入補助具を内視鏡挿入部に取り付ける場合
の第１の操作を示す説明図、図２８は内視鏡挿入補助具
を内視鏡挿入部に取り付ける場合の第２の操作を示す説
明図、図２９は内視鏡挿入補助具を内視鏡挿入部に装着
した状態を示す。
【００９８】説明図である。
【００９９】図２６に示すように、内視鏡挿入補助具３
０３は、固定部３３１と４個のヒレ状突起部３２とで構
成されている。
【０１００】固定部３３１は、円筒状に形成され、前記
内視鏡挿入部１１に装着される。４個のヒレ状突起部３
２は、柔軟で平たい薄肉形状となっており、体腔管内へ
の挿入方向に対して斜め後方の所定の角度で前記固定部
３３１の外表面から突出している。ヒレ状突起部３２の
固定部３３１の外表面から突出する位置は、固定部２３
１の長手中心軸方向の中間部になっている。
【０１０１】前記固定部３３１の前記ヒレ状突起部３２
が接続される部分３３５の内径Ｄ１は、前記内視鏡挿入
部１１の外径Ｄ３よりも小さく形成されている。前記固
定部３３１のヒレ状突起部３２が接続される部分以外の
部分３３６の内径Ｄ２は外径Ｄ３よりも大きく形成され
ている。
【０１０２】（作用）図２６において、前記内視鏡挿入
補助具３０３の固定部３３１の内径は、前記ヒレ状突起
部３２が接続される部分以外は前記内視鏡挿入部１１の
外径よりも大きく形成されているので、図２７に示すよ
うに前記内視鏡挿入部１１への装着に際しても内径Ｄ２
の部分３３６がガイドとなり前記内視鏡挿入部１１の挿
入部先端部２１が前記ヒレ状突起部３２の接続部近傍に
至るまではスムーズに装着することができる。
【０１０３】また、前記ヒレ状突起部３２の接続部近辺
において、前記固定部３３１の内径が前記内視鏡挿入部
１１の挿入部先端部２１の外径よりも小さいために干渉
するような場合でも、前記ヒレ状突起部３２を手３００
で把持することで図２８に示すように容易に前記内視鏡
挿入補助具３０３を変形させることができ、図２９に示
すように内視鏡挿入補助具３０３は前記内視鏡挿入部１
１への装着が可能となる。
【０１０４】ここで、第４の実施の形態の比較として、
内視鏡挿入補助具の固定部の内径を均一に形成したもの
について図３０乃至図３２を用いて説明する。
【０１０５】図３０乃至図３２は第４の実施の形態の比
較例として内視鏡挿入補助具の固定部の内径を均一に形
成したものを示し、図３０は内視鏡挿入補助具と内視鏡
挿入部のサイズを示す説明図、図３１は内視鏡挿入補助
具を内視鏡挿入部に取り付ける作業の第１の例を説明す
る説明図、図３２は内視鏡挿入補助具を内視鏡挿入部に
取り付ける作業の第２の例を説明する説明図である。
【０１０６】図３０に示すように、前記内視鏡挿入補助
具３０７の固定部３７１の後端でない部分には前記ヒレ
状突起部３２が接続されており、前記固定部３７１の内
径Ｄ１は長手中心軸方向の全長に渡り、前記内視鏡挿入
部１１の外径Ｄ３よりも小さくなっている。
【０１０７】このような構造では、前記内視鏡挿入補助
具３０７の固定部３７１の開口部３７２を前記内視鏡挿
入部１１の挿入部先端部２１に被せるためには、図３１
に示すように前記固定部３７１の端部の開口部３７２を
指３００で広げるようにして装着しなければならない
が、一般に大腸用内視鏡の挿入部外形Ｄ３は１０ないし
１５ｍｍ程度であり、前記内視鏡挿入補助具３０７の固
定部３７１の開口部径が小さいために作業性が非常に悪
くなってしまう。また、図２８で示した実施の形態のよ
うに前記ヒレ状突起部３２を指３００で把持して開口部
３７２を広げようとしても、図３２に示すように前記ヒ
レ状突起部３２の接続部の内径が広がっても開口部３７
２はほとんど広がらないため、そのまま装着することは
困難である。
【０１０８】（効果）以上説明したように、第４の実施
の形態の前記内視鏡挿入補助具３０３は、内視鏡挿入補
助具の固定部の内径を均一に形成したものに比べて、前
記内視鏡挿入部１１への装着性を向上させることができ
る。
【０１０９】図３３は本発明の第４の実施の形態の第１
の変形例に係る内視鏡挿入補助具の半断面図である。
【０１１０】図３３において、前記内視鏡挿入補助具３
０４の固定部３４１の前記ヒレ状突起部３２が接続され
る部分から前側（前記内視鏡挿入部１１の体腔管内への
挿入方向に対して前側）の部分３４５の内径Ｄ１が、前
記内視鏡挿入部１１の外径Ｄ３よりも小さく形成されて
いる。前記ヒレ状突起部３２の接続部より後ろ側の部分
３４６の内径Ｄ２は前記内視鏡挿入部１１の外径Ｄ３よ
りも大きく形成されている。
【０１１１】このような第１の変形例では、前記固定部
３４１の前記ヒレ状突起部３２が接続される部分よりも
前側の内径Ｄ１が、前記内視鏡挿入部１１の外径Ｄ３よ
りも小さくなっているが、前記内視鏡挿入補助具３０４
の装着に際しては前記ヒレ状突起部３２を把持して前記
内視鏡挿入部１１の軸に沿って引っ張ってずらすことが
できるため、前記ヒレ状突起部３２の接続部から前側の
部分３４５については、前記内視鏡挿入部１１の外径Ｄ
３より小さい内径Ｄ１であっても装着性が著しく劣化す
ることはない。
【０１１２】図３４は本発明の第４の実施の形態の第２
の変形例に係る内視鏡挿入補助具の半断面図である。
【０１１３】図３４において、前記内視鏡挿入補助具３
０５の固定部３５１の後端には前記ヒレ状突起部３２が
接続されており、前記固定部３５１の接続部近傍の部分
３５５の内径Ｄ１が、前記内視鏡挿入部１１の外径Ｄ３
よりも小さく形成されている。
【０１１４】前記固定部３５１の他の部分３５６の内径
Ｄ２は、前記内視鏡挿入部１１の外径Ｄ３よりも大きく
形成されている。
【０１１５】即ち、内視鏡挿入補助具３０５は、図２６
に示した形状から、固定部３３１の前記ヒレ状突起部３
２の接続部から後ろのガイドとなる内径Ｄ２の部分３３
６を取り除いた形状になっている。
【０１１６】この変形例においても、前記内視鏡挿入補
助具３０５は、前記ヒレ状突起部３２を把持して前記固
定部３５１を変形させることで、容易に前記内視鏡挿入
部１１へ装着することができる。更にガイドとなる部分
がないために、装着後に前記内視鏡挿入補助具３０５と
前記内視鏡挿入部１１の間にできる段差や隙間を小さく
できる。
【０１１７】図３５は本発明の第４の実施の形態の第３
の変形例に係る内視鏡挿入補助具の半断面図である。
【０１１８】図３５において、前記内視鏡挿入補助具３
０６の固定部３６１の後端でない部分には、前記ヒレ状
突起部３２が接続されており、前記固定部３６１の内径
Ｄ１は長手中心軸方向の全長に渡り、前記内視鏡挿入部
１１の外径Ｄ３よりも小さくなっている。
【０１１９】即ち、内視鏡挿入補助具３０６は、図３３
に示した形状から、前記固定部３４１の前記ヒレ状突起
部３２の接続部から後ろのガイドとなる内径Ｄ２の部分
３４６を取り除いた形状になっている。
【０１２０】この第３の変形例においても、前記内視鏡
挿入補助具３０６は、前記ヒレ状突起部３２を指で把持
して前記固定部３６１を変形させることで、容易に前記
内視鏡挿入部１１へ装着することができる。更にガイド
となる部分がないために、装着後に前記内視鏡挿入補助
具３０６と前記内視鏡挿入部１１の間にできる段差や隙
間が小さくできる。
【０１２１】［付記］以上詳述したような本発明の上記
実施の形態によれば、以下の如き構成を得ることができ
る。
【０１２２】（付記項１） 内視鏡挿入部に一体または
着脱自在に固定される固定部と、体腔内への挿入方向に
対して斜め後方または後方に向かって突出した状態で前
記固定部に少なくとも１つ接続される柔軟な薄肉状のヒ
レ状突起部と、を具備し、前記固定部を前記内視鏡挿入
部に固定した状態でこの内視鏡挿入部を体腔管内で引き
操作するとき、前記ヒレ状突起部が体腔管壁に当接する
ことで、体腔管内での前記内視鏡挿入部の位置を保持す
る内視鏡挿入補助具であって、前記ヒレ状突起部の周縁
部分の少なくとも一部を、前記ヒレ状突起部が前記固定
部に接続される部分の一部よりも軟性にしたことを特徴
とする内視鏡挿入補助具。
【０１２３】（付記項２） 前記ヒレ状突起部の周縁部
分の少なくとも一部に、前記ヒレ状突起部が前記固定部
に接続される部分の一部よりも軟性の部材を配設したこ
とを特徴とする付記項１に記載の内視鏡挿入補助具。
【０１２４】（付記項３） 前記ヒレ状突起部の周縁部
分の少なくとも一部の肉厚を、前記ヒレ状突起部が前記
固定部に接続される部分の一部よりも薄くしたことを特
徴とする付記項１に記載の内視鏡挿入補助具。
【０１２５】（付記項４） 複数の前記ヒレ状突起部を
有し、前記ヒレ状突起部が前記内視鏡挿入部に当接する
方向に変形した際に、前記ヒレ状突起部の薄肉の周縁部
分が、隣接するヒレ状突起部の厚肉の中心部分に重なら
ないようにしたことを特徴とする付記項３に記載の内視
鏡挿入補助具。
【０１２６】（付記項５） 複数の前記ヒレ状突起部を
有し、前記ヒレ状突起部が前記内視鏡挿入部に当接する
方向に変形した際に、隣接するヒレ状突起部と重なりあ
った部分の厚さが、前記ヒレ状突起部の厚肉の中心部分
の肉厚よりも薄いことを特徴とする付記項３または４に
記載の内視鏡挿入補助具。
【０１２７】（付記項６） 内視鏡挿入部の一部に着脱
自在に固定される固定部と、体腔内への挿入方向に対し
て斜め後方または後方に向かって突出した状態で前記固
定部に少なくとも１つ接続される柔軟な薄肉状のヒレ状
突起部と、を具備し、前記固定部を前記内視鏡挿入部に
固定した状態でこの内視鏡挿入部を体腔管内で引き操作
するとき、前記ヒレ状突起部が体腔管壁に当接すること
で、体腔管内での前記内視鏡挿入部の位置を保持する内
視鏡挿入補助具であって、前記固定部は略円筒形の部材
であり、前記固定部の前記ヒレ状突起部が接続される部
分近傍の固定部円周上の少なくとも一部に厚肉部を設け
たことを特徴とする内視鏡挿入補助具。
【０１２８】（付記項７） 前記厚肉部は、前記固定部
の外径を均一にし内径側を厚肉化させて形成したことを
特徴とする付記項６に記載の内視鏡挿入補助具。
【０１２９】（付記項８） 前記厚肉部は、前記固定部
の内径を均一にし外径側を厚肉化させて形成したことを
特徴とする付記項６に記載の内視鏡挿入補助具。
【０１３０】（付記項９） 内視鏡挿入部の一部に着脱
自在に固定される固定部と、体腔内への挿入方向に対し
て斜め後方または後方に向かって突出した状態で前記固
定部に少なくとも１つ接続される柔軟な薄肉状のヒレ状
突起部と、を具備し、前記固定部を前記内視鏡挿入部に
固定した状態でこの内視鏡挿入部を体腔管内で引き操作
するとき、前記ヒレ状突起部が体腔管壁に当接すること
で、体腔管内での前記内視鏡挿入部の位置を保持する内
視鏡挿入補助具であって、前記固定部は弾性体の部材で
形成され、前記固定部の前記ヒレ状突起部が接続される
部分近傍の内径が、前記固定部が装着される内視鏡挿入
部の外径よりも小さいことを特徴とする内視鏡挿入補助
具。
【０１３１】（付記項１０） 前記固定部は、前記固定
部の前記ヒレ状突起部が接続される部分近傍から、体腔
内への挿入方向に対して前側の部分の内径が、前記固定
部が装着される内視鏡挿入部の外径よりも小さいことを
特徴とする付記項９に記載の内視鏡挿入補助具。
【０１３２】（付記項１１） 前記固定部は、前記固定
部の、体腔内への挿入方向に対して後ろ側の端部に前記
ヒレ状突起部を接続したことを特徴とする付記項９に記
載の内視鏡挿入補助具。
【０１３３】（付記項１２） 内視鏡挿入部に一体また
は着脱自在に固定される固定部と、体腔内への挿入方向
に対して斜め後方または後方に向かって突出する、前記
固定部に少なくとも１つ接続される柔軟な薄肉状のヒレ
状突起部とを有し、前記固定部を前記内視鏡挿入部に固
定した状態でこの内視鏡挿入部を体腔管内で引き操作す
るとき、前記ヒレ状突起部が体腔管壁に当接すること
で、体腔管内での前記内視鏡挿入部の位置を保持する内
視鏡挿入補助具において、前記ヒレ状突起部の周縁部分
の少なくとも一部を、前記ヒレ状突起部が前記固定部に
接続される部分の一部よりも軟性にしたことを特徴とす
る内視鏡挿入補助具。
【０１３４】（付記項１３） 内視鏡挿入部の一部に着
脱自在に装着される略管状の固定部と、体腔内への挿入
方向に対して斜め後方または後方に向かって突出する、
前記固定部に少なくとも１つ接続される柔軟な薄肉状の
ヒレ状突起部とを有し、前記固定部を前記内視鏡挿入部
に装着した状態でこの内視鏡挿入部を体腔管内で引き操
作するとき、前記ヒレ状突起部が体腔管壁に当接するこ
とで、体腔管内での前記内視鏡挿入部の位置を保持する
内視鏡挿入補助具において、前記固定部は弾性体の部材
で形成され、前記固定部の前記ヒレ状突起部が接続され
る部分近傍の内径が、前記固定部が装着される内視鏡挿
入部の外径よりも小さいことを特徴とする内視鏡挿入補
助具。
【０１３５】（付記項１４） 内視鏡挿入部の一部に着
脱自在に装着される略管状の固定部と、体腔内への挿入
方向に対して斜め後方または後方に向かって突出する、
前記固定部に少なくとも１つ接続される柔軟な薄肉状の
ヒレ状突起部とを有し、前記固定部を前記内視鏡挿入部
に装着した状態でこの内視鏡挿入部を体腔管内で引き操
作するとき、前記ヒレ状突起部が体腔管壁に当接するこ
とで、体腔管内での前記内視鏡挿入部の位置を保持する
内視鏡挿入補助具において、前記固定部は弾性体の部材
で形成され、前記固定部の前記ヒレ状突起部が接続され
る部分近傍の内径が、前記固定部が装着される内視鏡挿
入部の外径よりも小さいことを特徴とする内視鏡挿入補
助具。
【０１３６】
【発明の効果】以上述べた様に請求項１に記載の内視鏡
装置によれば、操作者が特別な作業をしなくても、押し
操作の時には進みやすく、引き操作の時には抵抗が増す
ことで内視鏡挿入部の位置を保持し、内視鏡挿入部の挿
入性を向上することができる。
【０１３７】また、請求項１に記載の内視鏡装置によれ
ば、前記内視鏡を体腔内に挿入する際に患者に与える違
和感を小さくすることが可能になる。Description: BACKGROUND OF THE INVENTION [0001] The present invention relates to an endoscope insertion portion.
Fixed to the body or detachable, into the body cavity of the endoscope insertion part
The present invention relates to an endoscope insertion aid that assists in insertion of an endoscope. 2. Description of the Related Art Conventionally, an example of an endoscope apparatus used for surgery has been described.
Then, insert the objective lens and light guide into the tip of the insertion section of the endoscope.
, Air / water feed port and suction port
There is In such an endoscope device, a light guide is required.
Light on a subject such as a living tissue, and the subject exposed to this light
Visualize the body through the objective lens and send it from the air / water outlet.
Air or water or other substances can be sucked through the suction port.
It has become so. By the way, for example, a curved body cavity such as the intestinal tract
When inserting the endoscope into the endoscope, use the operation unit at hand of the endoscope.
Do not bend the bending section on the distal end side of the endoscope by operating
Although it is inserted into the body cavity, the intestinal tract often curves
Is often caught on the endoscope tip.
It took time. In response to this, US Pat.
The endoscope insertion aid described in No. 7,872 is an endoscope insertion device.
An elastic projection is provided on the sleeve to be attached to the
The body is introduced periodically to project outward and backward and the body cavity
Contact to advance the endoscope insertion section and then flush the fluid
And the protrusion is retracted into the sleeve.
You. [0005] By the operation of such a projection, the endoscope is used.
The insertion aid can be easily inserted into the intestinal tract that has many curved parts
I can do it. [0006] However, the US
The endoscope insertion aid described in JP 4,207,872 is
Inflates each protrusion on the sleeve attached to the endoscope insertion section
・ A conduit for contraction and fluid pressure control means are required.
Not only complicates workability but also increases costs.
I was Also, the protrusion provided on the sleeve protrudes.
If the endoscope insertion part is removed,
The endoscope is pulled out when the projections
When removing the endoscope insertion part.
Needs to shrink the protrusion, and the operation for that
It was complicated and troublesome. Also, during the endoscopic examination, the sleeve gradually
Is easily removed from the insertion section of the endoscope.
-There was a possibility that the treatment property might be deteriorated. [0008] The present invention has been made in view of the above circumstances.
The push operation can be performed without any special operation by the operator.
Sometimes it is easy to advance, and during pulling operation, resistance increases
Holds the position of the endoscope insertion section and improves the insertability of the endoscope insertion section
To provide an endoscope insertion aid that can be improved
With the goal. [0009] Further, the present invention allows the operator to perform special work.
Even if not, it is easy to advance at the time of push operation, and at the time of pull operation
Increases the resistance to maintain the position of the endoscope insertion section,
While improving the insertability of the endoscope insertion section,
Discomfort given to the patient when inserting the endoscope into a body cavity
To provide an endoscope insertion aid capable of reducing the size
The purpose is to: [0010] Further, the present invention provides a special operation performed by an operator.
Even if not, it is easy to advance at the time of push operation, and at the time of pull operation
Increases the resistance to maintain the position of the endoscope insertion section,
While improving the insertability of the endoscope insertion section,
Improves the detachability of the endoscope insertion aid to the endoscope insertion section
To provide an endoscope insertion aid that can be
Aim. [0011] In order to achieve the above object,
The endoscope insertion aid according to claim 1 is provided in the endoscope insertion portion.
A fixed part that is integrally or detachably fixed, and
Projects obliquely backward or backward with respect to the insertion direction
At least one flexible part connected to the fixed part
And a thin fin-shaped protrusion.
With the endoscope insertion section fixed to the endoscope insertion section,
When a pulling operation is performed in the tube, the fin-shaped protrusions are
Abutting the endoscope insertion portion within the body cavity tube
An endoscope insertion aid that holds the
At least a part of the peripheral portion of the raised portion is provided with the fin-shaped protrusion.
Is softer than a part of the part connected to the fixing part
It is characterized by the following. Embodiments of the present invention will be described below with reference to the drawings.
This will be described with reference to FIG. (First Embodiment) FIGS. 1 to 8 show a first embodiment of the present invention.
FIG. 1 shows an embodiment having an endoscope insertion aid according to the embodiment.
FIG. 2 is an external view showing an endoscope apparatus, and FIG.
FIG. 3 is a perspective view showing an endoscope insertion aid to be worn, and FIG. 3 is an endoscope.
Half-cut when the insertion aid is cut along the longitudinal center axis of the fixed part
FIG. 4 shows an endoscope insertion aid of another example different from FIG.
FIG. 5 is a half-sectional view when cut along the longitudinal center axis of the part, and FIG.
Description showing how the mirror insertion aid is attached to the endoscope insertion part
Figs. 6 to 8 show the endoscope insertion portion from the sigmoid colon of the large intestine.
It is explanatory drawing which shows a mode that it inserts in a descending colon. (Construction) As shown in FIG.
The endoscope device 1 according to the embodiment is an elongated and flexible endoscope.
Endoscope 2 having insertion portion 11 and insertion portion of endoscope 2
11 (hereinafter, referred to as an endoscope insertion section 11)
It mainly comprises an endoscope insertion aid 3. The endoscope 2 is connected to the endoscope insertion portion 11.
It mainly comprises an operation unit 12. Operation of the endoscope 2
The unit 12 (hereinafter, referred to as an endoscope operation unit 12)
It is provided continuously to the base end side of the mirror insertion portion 11 and also serves as a grip portion.
You. From the side of the operation unit 12, the universal cord 1
3 is extended. At the end of the universal cord 13
A connector (not shown) is provided. Endoscope 2
Connect the connector of the universal cord 13 to the light source device and the video
Connected to the processor. [0015] The endoscope insertion portion 11 is sequentially arranged from the distal end side.
The distal end portion 21, the bending portion 22, and the flexible portion 23 are connected to each other.
Has been established. The bending portion 22 can be bent in a desired direction.
ing. The flexible portion 23 is a flexible member having flexibility.
Is formed. The distal end portion 21 of the endoscope insertion portion 11 (hereinafter referred to as the end portion 21)
Bottom, referred to as the insertion portion tip 21) is covered with a tip cover 24.
Have been. The curved portion 22 is covered with a curved rubber 25.
ing. The endoscope operation section 12 has a bending operation knob.
14 are provided. This bending operation knob 14 rotates
By operating, the bending portion 22 is operated to bend.
It has become. The endoscope insertion section 11 has the insertion
For example, in the connection portion between the entrance end portion 21 and the bending portion 22,
A convex portion 26 formed by raising an adhesive or the like is provided.
I have. Further, the endoscope insertion section 11 is
The connection portion with the flexible portion 23 is also similar to the protrusion 26.
Protrusions 27 are provided. [0020] The endoscope insertion aid 3 is inserted into the body cavity tube.
This is for holding the position of the endoscope insertion section 11.
You. Next, referring to FIG. 2, the endoscope insertion aid will be described.
3 will be described in detail. As shown in FIG.
The endoscope insertion aid 3 includes a fixed portion 31 and four fin-shaped protrusions.
32. The fixing portion 31 is formed in a cylindrical shape, and
It is attached to the endoscope insertion section 11. Four fin-like projections 32
Has a flexible, flat, thin-walled shape,
At a predetermined angle obliquely rearward with respect to the insertion direction, the fixing portion 3
1 protrudes from the outer surface. The material of the fin-like projections 32 is silicon
Any elasticity such as rubber, fluoro rubber or polyurethane
It can be selected from materials. In addition, the fixing portion 31 is
It may be formed of the same material as the raised portion 32 or a different elastic material.
Not only can you use a combination of
In addition, rigid materials such as metals and plastics can be used.
I don't know. These fin-like projections 32 are formed with a hard portion 33
And a flexible portion 34 provided on a part of the periphery thereof. Next, the endoscope insertion aid 3 will be described with reference to FIG.
The structure will be described in detail. Here, the arrow A in FIG.
The longitudinal center axis of the fixing portion 31 (of the endoscope insertion portion 11)
Endoscope from the outside in a plane perpendicular to the insertion direction)
The direction in which the insertion assisting tool 3 is viewed is shown. As shown in FIG.
The endoscope insertion aid 3 is seen from the direction of arrow A.
The surface on the side is a surface, and is a half of the longitudinal center axis of the fixing portion 31.
The surface seen in the radial direction is the back surface. The endoscope insertion aid 3 is the same as that shown in FIG.
Attached to the bending section 22 of the endoscope insertion section 11 and described later.
As described with reference to FIGS. 6 to 8, the endoscope insertion portion 11
It is used by inserting it into a body cavity. And the endoscope insertion
When the auxiliary tool 3 is operated to pull the endoscope insertion section 11, the
The fin-like projection 32 contacts the wall of the body cavity tube, and is indicated by a broken line in FIG.
As shown in FIG.
The endoscope can be inserted into the body cavity by contacting the body cavity wall.
The position of the entrance 11 is maintained. In this embodiment, the endoscope is inserted.
When the pulling operation of the part 11 is performed, the fin-shaped protrusion 32
In the peripheral portion of the fin-shaped projection 32 abutting on the cavity wall,
A member that is softer than the hard part 33 at the center
The unit 34 is configured. As shown in FIG. 3, the flexible portion 34
Of the peripheral portion of the fin-like projection 32 when viewed from the mark A
Or a half-section as shown in FIG.
Of the rim-shaped protrusion 32,
You may arrange | position respectively so that a surface and a back surface may be covered. (Operation) In the first embodiment, the endoscope
As shown in FIG. 5, the endoscope insertion part 3 is a mirror insertion aid.
11 to be used. The endoscope insertion section 11 is
One front end of the curved portion 22 between the convex portions 27
The endoscope insertion aid 3 is attached.
Here, the curved portion 22 has a substantially cylindrical shape, and has a substantially cylindrical shape.
Of the fixed portion 31 of the endoscope insertion aid 3 formed
The outer diameter is formed larger than the inner diameter. Because of this
The fixing portion 31 of the endoscope insertion aid 3 is connected to the bending portion 22.
Is mounted so that it does not come off easily after mounting
It has become. The projection 26 is used to assist the endoscope insertion.
The axial position of the tool 3 in the endoscope insertion portion 11
And the fixing part 31 does not move forward.
Is regulated. Then, the endoscope is inserted into the endoscope insertion portion 11.
The endoscope 2 equipped with the mirror insertion aid 3 is shown in FIG.
Is inserted into a patient's body cavity to perform an endoscopy or the like. FIGS. 6 to 8 show the endoscope insertion portion 11
Like inserting from the sigmoid colon 41 of the large intestine to the descending colon 42
FIG. 6 shows the distal end of the insertion portion of the endoscope insertion portion 11.
21 shows a place where the sigmoid colon 41 enters a bent portion in the middle
FIG. 7 shows the endoscope insertion portion 1 from the state of FIG.
The behavior of the intestinal wall 43 when 1 is pulled in the direction of arrow B
FIG. 8 shows the endoscope further from the state of FIG.
By pulling the insertion portion 11 in the direction of arrow B, the sigmoid colon 41
FIG. 4 is an explanatory diagram when the descending colon 42 is substantially straight
You. As shown in FIG. 6, the endoscope insertion portion 11
Insertion part tip 21 enters the bending part in the middle of sigmoid colon 41
Until then, the operator operating the endoscope 2 performs a push operation.
The endoscope insertion section 11 is inserted while being inserted. The fin-like projection 32 is fixed to the fixing part 31.
From the insertion direction of the endoscope insertion portion 11
Or projecting obliquely rearward, and
The protrusion 32 is formed of a flexible thin member.
When the pushing operation is performed, the fin-like projection 32
Assume that it has come into contact with the tube wall (intestinal wall 43 in FIGS. 6 to 8).
However, the fin-like projections 32 are attached to the endoscope insertion portion 11.
Because it falls easily so that it contracts in the contact direction,
The resistance when the endoscope insertion section 11 is pushed is determined by the endoscope.
Almost increased compared to the case without insertion aid 3
Insertion can be performed smoothly. An operator operates an insertion section of the endoscope insertion section 11.
In FIG. 6, the distal end portion 21 has entered a bent portion in the middle of the sigmoid colon 41.
Even if the push operation is continued from the state, the sigmoid colon 41
Insertion of the endoscope insertion part 11 to be extended
Tip 21 is rather far from the entrance of the descending colon 42
I will. Then, the operator inserts the endoscope insertion section 11
Perform pull operation instead of push operation. Then Figure 7
As shown in the figure, a fin-shaped projection of the endoscope insertion aid 3
The end of the abutment 32 comes into contact with the intestinal wall 43 and rolls up.
Since the protruding portion 31 is formed of a flexible elastic member,
Is applied to the intestinal wall 43, and the intestinal wall 43
Friction increases. As described above, the endoscope insertion aid 3 is
Increasing the resistance of the fin-like projections 32 against the wall 43;
As a result, a part of the sigmoid colon 41 is placed near the operator in FIG.
Can be folded like In other words, the endoscope insertion
The assisting tool 3 is moved by the pulling operation of the endoscope insertion section 11 to S.
Of the colon 41 is shortened, and the shortened part is fin-shaped.
The projection 32 is held. At this point, the endoscope insertion aid 3 is mounted.
The endoscope insertion part 11 which is not provided with the fin-shaped protrusion 32.
To maintain the shortened state of the sigmoid colon 41
Is not easy, and the operator pulls the endoscope insertion portion 11
When operated, the insertion portion tip 2 of the endoscope insertion portion 11
High probability that one side will fall out of the sigmoid colon 41 as it is
No. In this embodiment, the endoscope insertion aid 3 is
Since the fin-shaped protrusion 32 is provided on the fixing portion 31, FIG.
The state shown in FIG. Here, in the state shown in FIG.
The distal end 21 of the insertion section 11 of the endoscope insertion section 11 is inserted into the descending colon 42.
As the operator approaches the opening, the operator further pulls and curves
By performing the operation, from the sigmoid colon 41 as shown in FIG.
It can be substantially linear over the descending colon 42. So
The operator presses the endoscope insertion section 11
Then, the insertion portion distal end portion 21 is inserted deep into the descending colon 42.
Can be entered. In this manner, the endoscope is inserted into the endoscope insertion portion 11.
The endoscope insertion aid 11 pushed by the endoscope insertion aid 3
The direction of the operation and the direction of the pull operation
And the resistance to the intestinal wall 43 differs greatly. This
In addition, the endoscope insertion aid 3 has an
It is possible to shorten the bowel easily without damaging it
Become. The endoscope insertion aid 3 is provided with the endoscope insertion tool.
When the pull-in operation of the entrance portion 11 is performed, the fin-shaped projection portion is usually initially formed.
32 flexible portions 34 hit the intestinal wall 43. This flexible part 34
Is larger than the rigid portion 33 at the center of the fin-like projection 32.
Because it is soft and easily deformed,
Is very soft and gives the patient a sense of discomfort
Never. Here, all of the fin-like projections 32 are moved forward.
When it is formed as soft as the soft portion 34, the fin shape is obtained.
The force of returning to the projection 32 becomes weaker,
The mirror insertion aid 3 is provided with the fin-like projections on the intestinal wall 43.
32 is weakened, and the above-mentioned effects are hardly obtained. So
Here, in the present embodiment, the flexible portion 34 is deformed.
After that, the back surface of the fin-shaped projection 32 comes into contact with the intestinal wall 43.
In the state, the rigid portion 33 contacts the intestinal wall 43,
The intestinal wall 43 is formed by the rigid portion 33 having a moderate elasticity.
So that it can be held. (Effect) According to the first embodiment, the patient
Operation of the endoscope insertion section 11 without giving
It is easy to advance when working, and when pulling the endoscope insertion part 11
The intestinal wall 43 can be reliably held, and the endoscope insertion portion 11
Insertion tip 21 comes out of intestinal tract against operator's intention
The gut can be straightened without having to. This
Can improve the insertability of the endoscope insertion section,
Improves operability and shortens time for inspection and surgery using a mirror
It will work. The endoscope 2 of the present embodiment is an endoscope.
An unillustrated imaging device built into the insertion portion distal end portion 21 of the insertion portion 11.
Using an electronic endoscope that captures an endoscopic image of
However, the captured endoscope image is displayed at the rear end of the endoscope image operation unit.
An optical endoscope for observation with the eyepiece provided in
No. The fin-like projection 32 is provided with
The flexible portion 34 extends over the entire periphery of the fin-shaped projection 32.
The fin-like projection 32 may be disposed in the end view.
Arranged only on the rear end side with respect to the insertion direction of the mirror insertion portion 11
And only on the outer surface of the fin-like projection 32.
May be set up. In short, the fin-like projection 32 and the intestinal wall 43
The fin-like projections 32 are softened so that
The flexible portion 34 is disposed on at least a part of the peripheral portion of
It should just be. In this embodiment, the endoscope is inserted.
The assisting tool 3 is positioned forward with respect to the insertion direction of the endoscope insertion section 11.
Detachable directly behind the convex part 26 of the endoscope insertion part 11
One is to be mounted, but the number of mounting is two
It does not matter even if it is more than one,
Or one or more at one place,
Arbitrary numbers can be attached to multiple locations
Of course, it doesn't matter. In this embodiment, four fins are used.
The protruding portion 32 protrudes from the fixing portion 31,
The number of the fin-like projections 32 may be any number.
No. Further, the fin-like projection 32 is inserted into the body cavity tube.
Formed to project obliquely backward with respect to the insertion direction
But projecting right behind and behind the direction of insertion into the body lumen
It may be formed so that Further, the endoscope insertion aid 3 is used for inserting an endoscope.
9 and FIG.
0, as shown in a modified example of FIG.
It may be formed. FIG. 9 shows a first embodiment of the present invention.
It is a side view of the endoscope insertion part which shows a modification, FIGS.
The same components as those of the embodiment shown in FIG.
The description is omitted. As shown in FIG. 9, the endoscope insertion aid 5
Is a curved rubber covering the curved portion 52 of the endoscope insertion portion 51
55 and are integrally formed. That is, in the first modified example,
In addition, the endoscope insertion assisting tool 5 has only the fin-shaped projections 32.
Is formed. In such an endoscope insertion aid 5,
Also, the same effects as in the first embodiment shown in FIGS.
Fruit is obtained. FIG. 10 shows a second embodiment of the first embodiment of the present invention.
It is a side view of the endoscope insertion part which shows the modification of FIG.
The same components as those in the embodiment shown in FIG.
The description is omitted here. As shown in FIG. 10, the endoscope insertion aid 6
Is formed separately from the curved rubber 65 of the endoscope insertion portion 61.
Later, the insertion portion distal end portion 21 of the endoscope insertion portion 61 and the bay
Adhesive and the like were raised on the curved rubber 65, respectively.
It is fixed using the projection 26 and the projection 62. In such an endoscope insertion aid 6,
Also, the same effects as those of the embodiment shown in FIGS.
Can be Further, the endoscope insertion shown in FIGS.
The insertion aid 3 is a cover (endoscope) that covers the distal end portion 21 of the insertion section.
It may be formed integrally with the tip cover 24. On the spot
In this case, the endoscope distal end cover 24 and the fin-shaped protrusion 32
May be the same, or the material of the fin
The endoscope end cover 24 is made of a rigid material
A resin having a certain property may be used. (Second Embodiment) FIGS. 11 to 16
FIG. 11 relates to a second embodiment of the present invention, and FIG.
FIG. 12 is a perspective view of an insertion aid, and FIG.
With the fin-shaped protrusions attached to the insertion section,
FIG. 13 is a cross-sectional view taken along a plane perpendicular to the central axis.
First description in which one of the fin-shaped protrusions shown in FIG. 11 is enlarged.
FIG. 14 is an enlarged view of one of the fin-shaped protrusions shown in FIG.
FIG. 15 shows the endoscope insertion assisting device in an endoscope.
The fin-shaped protrusion is inserted into the endoscope while it is attached to the mirror insertion part
FIG. 16 is a perspective view when deformed so as to abut against a part, and FIG.
Endoscope insertion part and endoscope insertion assistance in the state shown in 15
The tool through a fin-shaped protrusion perpendicular to the longitudinal center axis of the fixing part.
It is sectional drawing at the time of cutting | disconnecting by a surface. (Structure) Here, the structure shown in FIGS.
In one embodiment, the endoscope insertion aid 3 is
A difference in hardness between the peripheral portion and the central portion of the projection 32
Therefore, the center of the fin-like projection 32 is
Although a member made of soft material was provided, this second implementation
In the embodiment, the thickness of the fin-shaped projection 132 is changed.
By making the difference between the hardness of the central part and the peripheral part
It is configured as follows. As shown in FIG. 11 and FIG.
The fin-shaped projection 132 of the endoscope insertion aid 103 is
Thick hard portion 133 (center) and thin soft portion 134
(Peripheral part). Thereby, the endoscope insertion
The insertion assisting tool 103 is a peripheral portion of the fin-shaped projection 132.
Is formed so as to be thinner than the central portion.
The thin peripheral portion of the fin-shaped projection 132 has its hardness.
Is configured to be softer than the central part
Often, the material is the same hardness or hardness as the central hard part
May of course be a soft material or the hardness of the material itself
Even if the material is harder than the hard part,
By making it thinner, it may be softer than the central part. The configuration of the cross section of the fin-like projection 132 is as follows.
As long as the thickness of the peripheral part is thinner than the thickness of the center part,
As shown in FIG. 13, the relationship between the thick portion and the thin portion is
A step t1-t2 is provided between the peripheral portion and
14 or gradually from the center as shown in FIG.
The thickness may be changed. In FIG. 14, the hard part
Although the boundary between 133 and the flexible portion 134 is not clear,
The peripheral part is softer than the vicinity of the center of the protruding part 132
What is necessary is just to be comprised so that it may become. Insert the endoscope insertion aid 103 into the endoscope
When attaching to the part 11 and inserting it into the body cavity by pushing operation
Are fin-shaped projections 132 of the endoscope insertion aid 103;
Is an arrow of FIG. 12 from the body cavity wall by contacting the body cavity wall.
An external force in the direction indicated by F is received. The fin
The protruding portion 132 is formed of a flexible thin member.
Therefore, the endoscope can be easily changed in the
Shape. Next, as shown in FIGS. 15 and 16,
The fin-shaped protrusion 132 abuts on the endoscope insertion portion 11
A description will be given of a state deformed as follows. Here, the shape of the fin-like projection 132
The fin-shaped projection 132 is inserted into the endoscope insertion portion 11.
Deforms to abut and overlaps adjacent fin-like protrusions
The fin-like projection 132 of the overlapping portion
So that the total thickness does not exceed the thickness of the central part
It is formed with an appropriate thickness and size. In FIG.
The two fin-shaped projections that meet each other contact the endoscope insertion section 11.
The fin-like projection 132
Are overlapped only at the peripheral portion of thickness t2.
The size of the central part and the peripheral part is set in
The thickness t2 of the peripheral portion is less than half of the thickness t1 of the central portion.
It is formed so that it becomes. Also, as shown in FIG.
In the case where the thickness of the fin-shaped projection 132 gradually changes
However, the two adjacent fin-shaped projections 132 are endoscopes.
When deformed so as to abut the insertion portion, the fin-shaped protrusion
The total thickness of the overlapping portion of the portion 132 is
The fin-like projections 13 should not exceed the maximum thickness t3.
2, the size and thickness are set. (Operation) In the second embodiment,
The endoscope insertion aid mounted on the endoscope insertion section 11
103 contacts the endoscope insertion portion 11 at the time of insertion into the body cavity.
The fin-like projection 132
The outer diameter d2 of the portion where the two thin portions overlap is the fin shape
The outer diameter d1 at the central portion of the projection 132 or
Same as the outer diameter of the fixing part 31 of the endoscope insertion aid 103
It becomes even smaller, and the thin peripheral part
However, the insertability is not impaired. The first embodiment is different from the first embodiment in that
By providing a thin peripheral portion on the protruding portion 132,
The area of the fin-shaped projection 132 can be increased,
When the endoscope insertion portion 11 is pulled, the intestinal wall and the fin
The raised portion 132 is easily brought into contact. (Effect) According to such a second embodiment,
Then, in addition to the effect of the first embodiment, the insertion at the time of the push operation is performed.
The fin-like projections can be used during pulling operation without impairing
Endoscope insertion by making 132 easier to abut against intestinal wall
The distal end 21 of the insertion part of the part 11 (see FIG. 1) is
Can be prevented from falling out of the body cavity
The effect of improving the insertability of the endoscope insertion portion 11 is obtained. The thickness of the thin portion is determined by each fin-shaped protrusion.
The rising portion 132 may be uniform, or each thin portion may have a uniform thickness.
The thickness may be different. In short, the fin-shaped protrusion 132
When deformed so as to contact the endoscope insertion portion 11, the thin portion
The outside diameter of the overlapped part is fixed part 31 or thick hard
Forming a thin portion so as to be smaller than the outer diameter of the
Just do it. (Third Embodiment) FIG. 17 and FIG.
FIG. 17 shows a third embodiment of the present invention.
FIG. 18 is a perspective view of the endoscope insertion aid shown in FIG.
Cut the insertion aid on a plane perpendicular to the longitudinal center axis of the
It is sectional drawing which cut | disconnected. As shown in FIG. 17, in this embodiment,
The endoscope insertion aid 203 is provided with the fin-shaped protrusion 3.
2 and the thickness of the portion 235 where the fixing portion 231 is connected
Is thicker than the other portion 236 of the fixing portion 231
It is formed as follows. The portion 235 is a fin of the fixing portion 231.
From the portion where the projection 32 is connected to the middle of the fixing portion 231
It is formed toward the center axis direction. As shown in FIG. 18, the length of the fixed portion 231
The cross section perpendicular to the central axis is indicated by the outer diameter d3 in the figure.
Four portions 235 are connected to the fin-shaped projections 32.
Part. The portion having the outer diameter d3 is the fin-shaped protrusion.
32 is larger than the outer diameter d4 of the portion 236 to which no connection is made.
Is formed. (Operation) Here, the present embodiment will be described.
For this reason, the first embodiment shown in FIGS.
The operation of the embodiment will be described with reference to FIGS.
You. FIGS. 19 to 21 show the first embodiment.
The endoscope insertion aid attached to the endoscope insertion section
FIG. 4 is an explanatory view showing a state of deformation when receiving an external force from a cavity.
You. As shown in FIG. 19, the endoscope insertion aid 3
Insert the endoscope insertion part 11 with a
When pulling in the direction, the endoscope insertion aid 3
The fin-like projections 32 are brought into contact with the intestinal wall 43 and the like.
An external force in the direction indicated by the middle arrow G is received. As described above, the fin-like projections 32
It is formed of a thin and flexible elastic member,
While holding down the intestinal wall 43 with the pulling operation of the entrance 11
By deforming, as shown in FIG.
The intestinal wall 43 behind the aid 3 (arrow C side) is folded,
The intestinal tract is shortened. However, when the external force G is excessively large
Or near the root of the fin-like projection 32 (with the fixing part 31).
Deforms when an external force G is applied to the vicinity of the connection portion of
The area exceeds the fin-like projection 32 and the fixing part 31
Fin-like projections as shown in FIG.
The state where the part 32 is folded toward the insertion part tip 21 side
There was a case. In the state shown in FIG.
The endoscope insertion aid 3 has the effect of holding down the intestinal wall during pulling operation.
No, and even in insertion by pushing operation, the insertion part
There is a risk that the insertability will deteriorate due to the large diameter.
Was. On the other hand, the second embodiment shown in FIGS.
In the third embodiment, the endoscope insertion aid 203 is mounted.
The worn endoscope insertion part 11 was pulled in the body lumen
At this time, external force as shown in FIG.
Even if G is added, the endoscope insertion aid 203 is
The connection portion between the fin-like projection 32 and the fixing portion 231 is thick.
A configuration in which the fixing portion 231 is hardly deformed because it is thinned.
, The fixing portion 231 is turned upside down.
There is no such thing. The third embodiment shown in FIGS.
In the embodiment, the thickness of the fin-shaped protrusion 1 is increased.
32 and only the vicinity of the connection portion of the fixed portion 31,
Minimized increase in outer diameter of the part inserted into the body cavity
That the insertability deteriorates significantly due to the increase in outer diameter
There is no. The endoscope insertion aid 203 is
The inner diameter of the fixing portion 231 is determined by the outer diameter of the endoscope insertion portion 11.
At the time of attachment to the endoscope insertion portion 11
The elastic part of the fixing part 231 is used to
1 attached to the endoscope insertion part 11 by widening the opening diameter
And fixed. Therefore, generally, the fixing portion 231
When the thickness of the fixing portion 231 increases, the fixing portion 231 is elastically deformed.
The detachability is lower than when the wall thickness is not increased
There is a tendency. However, in the present embodiment,
The fin-like projections 132 and the fixing portions 23
The thickness of the other parts is only near the connection part of No. 1.
It remains thin and can be easily elastically deformed
Therefore, the deterioration of the detachability is minimized. The fin-like projections of the fixing portion 231
The vicinity of the portion where the portion 32 is connected is
Can be gripped and pulled.
It is easy to deform because more force is applied than the part
No. From these, in the third embodiment, the fixing
As compared with the case where the thickness of the portion 231 is not increased, the detachability is almost the same.
Does not almost deteriorate. Further, in the third embodiment,
Outer diameter side of the connection between the fin-like projection 32 and the fixing part 231
Dimension change on the inner diameter side of the fixed part
There is no step, so no step is formed inside the fixed portion 231.
No. (Effect) The endoscope shown in the third embodiment
The mirror insertion aid 3 is attached to the endoscope insertion portion 11 and pulled.
The endoscope insertion aid 3 is fixed even when the
Since the part 231 does not turn over,
The effect of the ridge-like projections 32 holding down the intestinal wall is not lost. Also
The part where the thickness is increased is the fin of the fixing part 231.
Since it is only in the vicinity of the portion where the projection 32 is connected,
There is almost no deterioration in insertability and detachability. Further, in the third embodiment, the light source
Outer diameter in the vicinity of the connection between the protrusion 32 and the fixing portion 231
Side, so that the fixing portion 23
The step on the inner diameter side of 1 is hooked on the endoscope insertion portion 11
Nothing. In the third embodiment, the thickness is increased.
The fin-like projection 32 of the fixing portion 231
Is in the vicinity including the part to be connected.
The portion to which the protrusion 32 is connected is made thin and has a fin-like shape.
It is possible to increase the thickness between the portions where the projections are connected.
I don't know. The point is that it receives external force in the direction
When the external force is applied,
It is sufficient if there is a thick part against the
Longitudinal central axis direction of a portion to which the fin-shaped protrusion 32 is connected
In the vicinity of the upper part, a small part on the circumference of the
At least a part may be thickened. Further, in the third embodiment,
Forward to the rear end side with respect to the insertion direction of the fixing portion 231 into the body cavity
Although the form in which the fin-like projections 32 are connected is shown,
The fin-shaped protrusion is provided at the front end or the middle of the fixing portion 231.
32 may be connected. FIGS. 22 and 23 show a third embodiment of the present invention.
FIG. 22 shows an endoscope insertion aid according to a first modification of the embodiment.
FIG. 23 is a front view of the endoscope insertion aid of FIG.
While attached to the endoscope insertion section, the longitudinal center axis of the fixed section
It is sectional drawing at the time of cutting | disconnecting by. Here, FIG. 17 and FIG.
The endoscope insertion aid 3 is positioned in front of the fixing portion 31 in the circumferential direction.
The portion to which the fin-like projection 32 is connected is thickened.
On the other hand, in the first modified example shown in FIGS.
Is the longitudinal center of the fixing portion 251 of the endoscope insertion aid 205
Portion 2 on the side to which the fin-like projection 32 is connected in the axial direction
The other portion 25 is formed by overlaying 55 on the outside.
6 is made thicker. In this modification, the fixing portion 251 is
For the part to be fleshed out, the fixing part 251 and the fin
20 is not limited to only the portion to which the projection 32 is connected.
The fixing portion 251 is not turned up even when receiving the external force G shown in FIG.
And the fin-shaped protrusion of the fixing portion 251
An arbitrary portion near the portion where the raised portion 32 is connected is thickened.
It may be constituted so that it may be. FIG. 24 shows a second embodiment according to the third embodiment of the present invention.
It is sectional drawing of the endoscope insertion assistance tool which concerns on the modified example. Third Embodiment shown in FIGS. 17 and 18
Then, the fin-shaped protrusion 32 and the fixing portion 231 are connected.
24 is formed to be thicker toward the outside.
In a second modification of the third embodiment of the present invention shown in FIG.
The fin-like projection 32 and the fixing part 271 shown in FIG.
The connected portion 275 is closer to the inner diameter side than the other portion 276.
The thickness is increased by building up the surface. Fixed part 27
The inner diameter of one part 275 is smaller than the inner diameter of the other part 276.
It is getting smaller. The portion 275 is
From the portion where the fin-like projections 32 are connected to the fixing portions 271
It is formed toward the longitudinal center axis direction. The fin-like projection 32 and the fixing part 271
When the build-up is performed on the inner diameter side near the connection part of
Attach the endoscope insertion aid 207 to the endoscope insertion section 11
Step on the outer surface when
The endoscope insertion aid 207 comes into contact with the intestinal wall, etc.
You can soften the way you hit. In addition, the fin
By holding and pulling the protruding portion 32, the fixing portion
271 can be greatly deformed,
The tightening rate is tighter than other parts of the fixing part 271
However, the detachability is not impaired. Thereby, the endoscope insertion
The fixing force with the entrance 11 can be increased, and
The effect of becoming difficult is obtained. FIG. 25 shows a third embodiment of the present invention.
It is sectional drawing of the endoscope insertion assistance tool which concerns on the modified example. In the modified examples shown in FIGS.
In the longitudinal central axis direction of the fixing portion 251 of the mirror insertion aid 205
The part 255 on the side to which the fin-shaped projection 32 is connected is
It is thickened by building up outside.
FIG. 24 shows a second modification of the third embodiment of the present invention.
Then, in the longitudinal direction of the fixing portion 295 of the endoscope insertion aid 209,
A portion on the side to which the fin-like projection 32 is connected in the direction of the center axis
295, the other part 2
It is made thicker than 56. In such a third modified example,
Attach the endoscope insertion aid 209 to the endoscope insertion section 11
Step on the outer surface when
Wear. (Fourth Embodiment) FIGS. 26 to 29 show
FIG. 26 shows the insertion of an endoscope according to the fourth embodiment of the present invention.
FIG. 2 is a half cross-sectional view of the auxiliary tool taken along the longitudinal center axis of the fixing portion.
7: When attaching the endoscope insertion aid to the endoscope insertion part
FIG. 28 is an explanatory view showing the first operation of the endoscope insertion aid.
Showing the second operation when attaching the camera to the endoscope insertion section
FIG. 29 shows the endoscope insertion aid attached to the endoscope insertion part.
It shows the state where it was done. It is an explanatory view. As shown in FIG. 26, the endoscope insertion aid 3
Numeral 03 is composed of a fixing portion 331 and four fin-like projections 32.
Has been established. The fixing portion 331 is formed in a cylindrical shape,
It is attached to the endoscope insertion section 11. 4 fin-like projections 3
2 is a flexible, flat, thin-walled shape,
At a predetermined angle obliquely rearward with respect to the insertion direction of the fixing portion.
331 project from the outer surface. Fin-like projection 32
The position protruding from the outer surface of the fixing portion 331 is
1 is an intermediate portion in the longitudinal central axis direction. The fin-like projection 32 of the fixing part 331
Is connected to the endoscope insertion portion 335.
It is formed smaller than the outer diameter D3 of the portion 11. Said solid
Other than the portion where the fin-shaped protrusion 32 of the fixed portion 331 is connected
The inner diameter D2 of the portion 336 is formed larger than the outer diameter D3.
ing. (Operation) In FIG. 26, the endoscope is inserted.
The inner diameter of the fixing portion 331 of the assisting tool 303 is
Other than the part to which the part 32 is connected, the endoscope insertion part 11
Since it is formed larger than the outer diameter, as shown in FIG.
As described above, the inner diameter D2
Portion 336 serves as a guide for inserting the endoscope insertion portion 11
The leading end 21 of the entry portion is located near the connection portion of the fin-shaped projection 32.
Until it can be installed smoothly. Further, the vicinity of the connection portion of the fin-like projection 32
, The inner diameter of the fixing portion 331 is equal to the endoscope insertion portion.
11 because it is smaller than the outer diameter of the insertion portion tip 21
In such a case, the fin-like projection 32 is
By holding with the endoscope, as shown in FIG.
The insertion aid 303 can be deformed, as shown in FIG.
As described above, the endoscope insertion aid 303 is
1 can be mounted. Here, as a comparison with the fourth embodiment,
Uniform inner diameter of fixed part of endoscope insertion aid
Will be described with reference to FIGS. FIGS. 30 to 32 show ratios of the fourth embodiment.
As a comparative example, the inner diameter of the fixed part of the endoscope
FIG. 30 shows an endoscope insertion aid and an endoscope.
FIG. 31 is an explanatory view showing the size of the insertion portion, and FIG.
A first example of the operation of attaching the tool to the endoscope insertion section will be described.
FIG. 32 shows an endoscope insertion aid in the endoscope insertion portion.
FIG. 9 is an explanatory diagram illustrating a second example of the attaching operation. As shown in FIG. 30, the endoscope insertion assist
The part other than the rear end of the fixing part 371 of the tool 307 is
The protruding portion 32 is connected to the inside of the fixing portion 371.
The diameter D1 extends over the entire length in the longitudinal central axis direction, and the endoscope is inserted.
It is smaller than the outer diameter D3 of the portion 11. In such a structure, the endoscope insertion assist
The opening 372 of the fixing portion 371 of the tool 307 is inserted into the endoscope.
In order to cover the insertion portion distal end portion 21 of the insertion portion 11, FIG.
The opening 372 at the end of the fixing portion 371 is
Must be spread out with fingers 300
However, generally, the outer diameter D3 of the insertion section of the colonoscope is 10 to
The endoscope insertion aid 307 is about 15 mm.
Workability is very poor due to the small opening diameter of the fixed portion 371.
It will get worse. Also, in the embodiment shown in FIG.
The fin-like projection 32 is gripped by the finger 300 to
Even if the 372 is to be expanded, as shown in FIG.
Even if the inner diameter of the connection portion of the ridge-shaped projection 32 is widened, the opening 37
2 is hardly spread, so you can just wear it
Have difficulty. (Effect) As described above, the fourth embodiment
The endoscope insertion aid 303 in the form of
Compared to the case where the inside diameter of the fixed part of the aid is formed uniformly,
The attachment to the endoscope insertion portion 11 can be improved.
You. FIG. 33 shows a first embodiment of the fourth embodiment of the present invention.
It is half sectional drawing of the endoscope insertion assistance tool which concerns on the modified example. In FIG. 33, the endoscope insertion aid 3
04 are connected to the fin-like projections 32 of the fixing portion 341.
To the front side (from the endoscope insertion portion 11 into the body cavity tube).
The inside diameter D1 of the portion 345 (on the front side with respect to the insertion direction) is
It is formed smaller than the outer diameter D3 of the endoscope insertion portion 11.
I have. A portion behind the connection portion of the fin-like projection 32
The inner diameter D2 of 346 is equal to the outer diameter D3 of the endoscope insertion section 11.
It is also formed large. In such a first modification, the fixing portion
341 than the portion to which the fin-shaped protrusion 32 is connected.
The inner diameter D1 on the front side is smaller than the outer diameter D3 of the endoscope insertion portion 11.
The endoscope insertion aid 304
When attaching the fin-shaped projection 32,
Pull along the axis of the endoscope insertion section 11 to shift
Because it is possible, the connecting portion of the fin-shaped protrusion 32
For the portion 345, the outer diameter D of the endoscope insertion portion 11
Even if the inner diameter D1 is smaller than 3, the mountability is significantly deteriorated.
Never. FIG. 34 shows a second embodiment according to the fourth embodiment of the present invention.
It is half sectional drawing of the endoscope insertion assistance tool which concerns on the modified example. In FIG. 34, the endoscope insertion aid 3
The fin-like projection 32 is provided at the rear end of
Connected to a portion near the connection portion of the fixed portion 351
355 is the outer diameter D3 of the endoscope insertion portion 11
It is formed smaller than. The inner diameter of the other portion 356 of the fixing portion 351
D2 is larger than the outer diameter D3 of the endoscope insertion portion 11.
Is formed. That is, the endoscope insertion aid 305 is
From the shape shown in FIG.
A portion 33 of the inside diameter D2 that serves as a rear guide from the connection portion 2
6 is removed. Also in this modification, the endoscope insertion supplement
The assisting tool 305 grasps the fin-like projection 32 and
The endoscope can be easily inserted by deforming the fixed portion 351.
It can be attached to the unit 11. Further guides
Because there is no, after mounting the endoscope insertion aid 305
Steps and gaps formed between the endoscope insertion portions 11 are reduced.
it can. FIG. 35 shows a third embodiment according to the fourth embodiment of the present invention.
It is half sectional drawing of the endoscope insertion assistance tool which concerns on the modified example. In FIG. 35, the endoscope insertion aid 3
In the part other than the rear end of the fixing portion 361 of FIG.
The protrusion 32 is connected, and the inner diameter of the fixed portion 361 is
D1 extends over the entire length in the longitudinal central axis direction, and the endoscope insertion portion
11 is smaller than the outer diameter D3. That is, the endoscope insertion aid 306 is
From the shape shown in FIG.
A portion of the inner diameter D2 that serves as a rear guide from the connection portion of the portion 32
346 is removed. In this third modification, the endoscope
The insertion assisting tool 306 holds the fin-like projection 32 with a finger.
Then, by deforming the fixing portion 361,
It can be attached to the endoscope insertion section 11. Further guide
Since there is no part that becomes
Step or gap created between the tool 306 and the endoscope insertion portion 11
The interval can be reduced. [Supplementary Note] The above-mentioned description of the present invention as described in detail above
According to the embodiment, the following configuration can be obtained.
You. (Additional Item 1) Integral or
A fixed part that is detachably fixed, and the insertion direction into the body cavity
Front with a diagonally backward or rearward projection
At least one flexible thin-walled fin connected to the fixing part
And the endoscope inserted into the endoscope.
Pull the endoscope insertion section into the body lumen
When operated, the fin-shaped protrusion contacts the wall of the body cavity
By maintaining the position of the endoscope insertion portion in the body cavity
An endoscope insertion aid, wherein a peripheral edge of the fin-shaped protrusion is provided.
The fin-shaped protrusions fix at least a part of the portion.
It is characterized by being softer than a part of the part connected to the part
Endoscope insertion aid. (Appendix 2) Peripheral edge of the fin-like projection
The fin-shaped protrusions are attached to the fixing portion
A member that is softer than part of the part connected to
3. The endoscope insertion aid according to claim 1, wherein (Appendix 3) Peripheral edge of the fin-like projection
The fin-shaped protrusions have a thickness of at least a part of
Specially, it is thinner than a part of the part connected to the fixed part.
The endoscope insertion aid according to Additional Item 1, which is a feature. (Additional Item 4) A plurality of the fin-like projections
And the fin-shaped projections abut on the endoscope insertion portion
When deformed in the direction, the thin peripheral portion of the fin-shaped protrusion
If the minute overlaps the thick center of the adjacent fin-shaped protrusion
The endoscope according to Additional Item 3, characterized in that the endoscope is not provided.
Mirror insertion aid. (Appendix 5) A plurality of the fin-like projections
And the fin-shaped projections abut on the endoscope insertion portion
When it is deformed in the direction, it overlaps with the adjacent fin-shaped protrusion.
The thickness of the center portion of the thick part of the fin-shaped protrusion is
Item 3 or 4 characterized by being thinner than
The endoscope insertion aid according to the above. (Appendix 6) Detachable from part of the endoscope insertion part
The fixing part that can be fixed freely and the insertion direction into the body cavity
The diagonally backward or rearward
Flexible thin fins connected to at least one fixed part
And a protrusion, wherein the fixing part is attached to the endoscope insertion part.
Pull the endoscope insertion section inside the body cavity tube while fixing it
When the fin-shaped protrusion contacts the wall of the body cavity
In holding the position of the endoscope insertion portion in the body cavity tube,
An endoscope insertion aid, wherein the fixing portion is a substantially cylindrical member.
A part to which the fin-shaped protrusion of the fixing part is connected.
At least part of the circumference of the fixed part near the center
An endoscope insertion aid, characterized in that: (Supplementary Note 7) The thick portion may be the fixed portion.
That the outer diameter of the
7. The endoscope insertion aid according to Additional Item 6, which is characterized in that: (Supplementary Item 8) The thick portion may be the fixed portion
That the inner diameter of the
7. The endoscope insertion aid according to Additional Item 6, which is characterized in that: (Appendix 9) Detachable to part of endoscope insertion part
The fixing part that can be fixed freely and the insertion direction into the body cavity
The diagonally backward or rearward
Flexible thin fins connected to at least one fixed part
And a protrusion, wherein the fixing part is attached to the endoscope insertion part.
Pull the endoscope insertion section inside the body cavity tube while fixing it
When the fin-shaped protrusion contacts the wall of the body cavity
In holding the position of the endoscope insertion portion in the body cavity tube,
An endoscope insertion aid, wherein the fixed portion is an elastic member.
Formed, and the fin-shaped protrusions of the fixing portion are connected
Endoscope insertion where the inner diameter near the part is mounted with the fixed part
Endoscope insertion aid characterized by being smaller than the outer diameter of the head
Utensils. (Additional Item 10)
From the vicinity of the part where the fin-shaped protrusion is connected to the body cavity
The inside diameter of the part on the front side with respect to the insertion direction into the
Make sure that the outer diameter of the
The endoscope insertion aid according to claim 9, wherein the endoscope insertion aid is characterized in that: (Additional Item 11) The fixing portion may be fixed
At the end on the rear side with respect to the direction of insertion into the body cavity
The fin-shaped projections are connected to each other.
Endoscope insertion aid (Appendix 12) The endoscope insertion part is integrated or
Is a fixed part that is detachably fixed and the direction of insertion into the body cavity
Projecting obliquely rearward or rearward with respect to the
Flexible thin fin connected to at least one fixed part
And the fixing portion is fixed to the endoscope insertion portion.
Pull the endoscope insertion section into the body cavity
The fin-shaped projections come into contact with the body cavity wall when
In holding the position of the endoscope insertion portion in the body cavity tube,
In the endoscope insertion aid, a peripheral portion of the fin-shaped protrusion is provided.
At least part of the fin-shaped protrusions
It is characterized by being softer than a part of the part to be connected
Endoscope insertion aid. (Appendix 13) Attached to a part of the endoscope insertion section
A generally tubular fixing part that can be detached and inserted into a body cavity
Projecting obliquely backward or backward with respect to the direction,
At least one flexible thin wall connected to the fixing part
A fin-shaped protrusion, and the fixing part is provided with the endoscope insertion part.
Pull the endoscope insertion section into the body cavity
When working, make sure that the fin-shaped projections
With, to maintain the position of the endoscope insertion portion in the body cavity tube
In the endoscope insertion aid, the fixing portion may be an elastic member.
And the fin-like projections of the fixing part are connected.
The inner diameter near the part where the endoscope is inserted
Endoscope insertion aid characterized by being smaller than the outer diameter of the entrance
Aids. (Appendix 14) Attached to a part of the endoscope insertion section
A generally tubular fixing part that can be detached and inserted into a body cavity
Projecting obliquely backward or backward with respect to the direction,
At least one flexible thin wall connected to the fixing part
A fin-shaped protrusion, and the fixing part is provided with the endoscope insertion part.
Pull the endoscope insertion section into the body cavity
When working, make sure that the fin-shaped projections
With, to maintain the position of the endoscope insertion portion in the body cavity tube
In the endoscope insertion aid, the fixing portion may be an elastic member.
And the fin-like projections of the fixing part are connected.
The inner diameter near the part where the endoscope is inserted
Endoscope insertion aid characterized by being smaller than the outer diameter of the entrance
Aids. The endoscope according to claim 1 as described above.
According to the device, even if the operator does not perform any special work,
Easy to move when operating, increases resistance when pulling
By holding the position of the endoscope insertion section,
The penetration can be improved. In addition, according to the endoscope apparatus of the first aspect,
If the endoscope is inserted into a body cavity,
It becomes possible to reduce the sense of harmony.
【図面の簡単な説明】
【図１】本発明の第１の実施の形態に係る内視鏡挿入補
助具を備えた内視鏡装置を示す外観図。
【図２】図１の第１の実施の形態の内視鏡挿入部に装着
される内視鏡挿入補助具を示す斜視図。
【図３】図１の第１の実施の形態の内視鏡挿入補助具を
固定部の長手中心軸で切断した場合の半断面図。
【図４】図１の第１の実施の形態の図３とは別の例の内
視鏡挿入補助具を固定部の長手中心軸で切断した場合の
半断面図。
【図５】図１の第１の実施の形態の内視鏡挿入補助具を
内視鏡挿入部に装着した様子を示す説明図。
【図６】図１の第１の実施の形態の内視鏡挿入部を大腸
のＳ状結腸から下行結腸に挿入していく様子を示す第１
の説明図。
【図７】図１の第１の実施の形態の内視鏡挿入部を大腸
のＳ状結腸から下行結腸に挿入していく様子を示す第２
の説明図。
【図８】図１の第１の実施の形態の内視鏡挿入部を大腸
のＳ状結腸から下行結腸に挿入していく様子を示す第３
の説明図。
【図９】本発明の第１の実施の形態の第１の変形例を示
す内視鏡挿入部の側面図。
【図１０】本発明の第１の実施の形態の第２の変形例を
示す内視鏡挿入部の側面図。
【図１１】本発明の第２の実施の形態に係る内視鏡挿入
補助具の斜視図。
【図１２】図１１の第２の実施の形態の内視鏡挿入補助
具が内視鏡挿入部に装着された状態で、ヒレ状突起部の
長手方向の中心軸に対して垂直な平面で切断した断面
図。
【図１３】図１１の第２の実施の形態のヒレ状突起部の
１枚を拡大した第１の説明図。
【図１４】図１１の第２の実施の形態のヒレ状突起部の
１枚を拡大した第２の説明図。
【図１５】図１１の第２の実施の形態の前記内視鏡挿入
補助具が内視鏡挿入部に装着された状態でヒレ状突起部
が内視鏡挿入部に当接するように変形した場合の斜視
図。
【図１６】図１５に示した状態の内視鏡挿入部および内
視鏡挿入補助具を固定部の長手中心軸に垂直なヒレ状突
起部を通る平面で切断した場合の断面図。
【図１７】本発明の第３の実施の形態に係る内視鏡挿入
補助具の斜視図。
【図１８】図１７の第３の実施の形態の内視鏡挿入補助
具を固定部の長手中心軸に対して垂直な平面で切断した
断面図。
【図１９】図１の第１の実施の形態の内視鏡挿入部に装
着された内視鏡挿入補助具が腸壁等の管腔から外力を受
けたときの変形の様子を示す第１の説明図。
【図２０】図１の第１の実施の形態の内視鏡挿入部に装
着された内視鏡挿入補助具が腸壁等の管腔から外力を受
けたときの変形の様子を示す第２の説明図。
【図２１】図１の第１の実施の形態の内視鏡挿入部に装
着された内視鏡挿入補助具が腸壁等の管腔から外力を受
けたときの変形の様子を示す第３の説明図。
【図２２】本発明の第３の実施の形態の第１の変形例に
係る内視鏡挿入補助具の斜視図。
【図２３】本発明の第３の実施の形態の第１の変形例に
係る内視鏡挿入補助具の前記内視鏡挿入部に装着した状
態の断面図。
【図２４】本発明の第３の実施の形態の第２の変形例に
係る内視鏡挿入補助具の断面図。
【図２５】本発明の第３の実施の形態の第３の変形例に
係る内視鏡挿入補助具の断面図。
【図２６】本発明の第４の実施の形態に係る内視鏡挿入
補助具を示す半断面図。
【図２７】図２６の第４の実施の形態の内視鏡挿入補助
具を内視鏡挿入部に取り付ける場合の第１の操作を示す
説明図。
【図２８】図２６の第４の実施の形態の内視鏡挿入補助
具を内視鏡挿入部に取り付ける場合の第１の操作を示す
説明図。
【図２９】図２６の第４の実施の形態の内視鏡挿入補助
具を内視鏡挿入部に装着した状態を示す断面図。
【図３０】図２６の第４の実施の形態の作用を説明する
ための比較例を示す説明図。
【図３１】図３０の内視鏡挿入補助具を内視鏡挿入部に
取り付ける作業の第１の例を説明する説明図。
【図３２】図３０の内視鏡挿入補助具を内視鏡挿入部に
取り付ける作業の第２の例を説明する説明図。
【図３３】本発明の第４の実施の形態の第１の変形例に
係る内視鏡挿入補助具の半断面図。
【図３４】本発明の第４の実施の形態の第２の変形例に
係る内視鏡挿入補助具の半断面図。
【図３５】本発明の第４の実施の形態の第３の変形例に
係る内視鏡挿入補助具の半断面図。
【符号の説明】
１ …内視鏡装置
２ …内視鏡
３ …内視鏡挿入補助具
１１ …内視鏡挿入部
１２ …操作部
２１ …先端部
２２ …湾曲部
２３ …軟性部
３１ …固定部
３２ …ヒレ状突起部
３３ …硬性部
３４ …軟性部BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an external view showing an endoscope apparatus provided with an endoscope insertion aid according to a first embodiment of the present invention. FIG. 2 is a perspective view showing an endoscope insertion aid attached to the endoscope insertion section according to the first embodiment of FIG. 1; FIG. 3 is a half cross-sectional view of the endoscope insertion aid of the first embodiment shown in FIG. 1 when cut along a longitudinal center axis of a fixing portion. FIG. 4 is a half cross-sectional view of another example of the endoscope insertion assisting tool different from FIG. 3 of the first embodiment in FIG. 1 when cut along a longitudinal center axis of a fixing portion; FIG. 5 is an explanatory view showing a state in which the endoscope insertion aid of the first embodiment of FIG. 1 is attached to an endoscope insertion portion. FIG. 6 is a diagram showing a state in which the endoscope insertion portion of the first embodiment of FIG. 1 is inserted from the sigmoid colon of the large intestine to the descending colon.
FIG. FIG. 7 is a second view showing a state in which the endoscope insertion portion of the first embodiment of FIG. 1 is inserted from the sigmoid colon of the large intestine to the descending colon.
FIG. FIG. 8 is a third view showing a state in which the endoscope insertion portion of the first embodiment in FIG. 1 is inserted from the sigmoid colon of the large intestine to the descending colon.
FIG. FIG. 9 is a side view of an endoscope insertion section showing a first modification of the first embodiment of the present invention. FIG. 10 is a side view of an endoscope insertion section showing a second modification of the first embodiment of the present invention. FIG. 11 is a perspective view of an endoscope insertion aid according to a second embodiment of the present invention. FIG. 12 is a plan view perpendicular to the central axis in the longitudinal direction of the fin-shaped projection in a state where the endoscope insertion aid of the second embodiment shown in FIG. 11 is attached to the endoscope insertion portion; Sectional view cut. FIG. 13 is a first explanatory view in which one of the fin-shaped protrusions of the second embodiment in FIG. 11 is enlarged. FIG. 14 is a second explanatory view in which one of the fin-shaped protrusions of the second embodiment in FIG. 11 is enlarged. FIG. 15 is deformed so that the fin-shaped protrusion comes into contact with the endoscope insertion portion when the endoscope insertion aid of the second embodiment shown in FIG. 11 is attached to the endoscope insertion portion. FIG. 16 is a cross-sectional view of the endoscope insertion section and the endoscope insertion assisting tool in the state shown in FIG. 15 when cut along a plane passing through a fin-shaped projection perpendicular to the longitudinal center axis of the fixing section. FIG. 17 is a perspective view of an endoscope insertion aid according to a third embodiment of the present invention. FIG. 18 is a cross-sectional view of the endoscope insertion aid of the third embodiment shown in FIG. 17 cut along a plane perpendicular to the longitudinal center axis of the fixing portion. FIG. 19 is a first view showing a state of deformation of the endoscope insertion assisting tool attached to the endoscope insertion portion of the first embodiment of FIG. 1 when receiving an external force from a lumen such as an intestinal wall; FIG. FIG. 20 is a second view showing a state of deformation when the endoscope insertion aid attached to the endoscope insertion section of the first embodiment in FIG. 1 receives an external force from a lumen such as an intestinal wall; FIG. FIG. 21 is a third view showing a state of deformation when the endoscope insertion aid attached to the endoscope insertion section of the first embodiment in FIG. 1 receives an external force from a lumen such as an intestinal wall; FIG. FIG. 22 is a perspective view of an endoscope insertion aid according to a first modification of the third embodiment of the present invention. FIG. 23 is a sectional view of an endoscope insertion aid according to a first modification of the third embodiment of the present invention attached to the endoscope insertion portion; FIG. 24 is a cross-sectional view of an endoscope insertion aid according to a second modification of the third embodiment of the present invention. FIG. 25 is a cross-sectional view of an endoscope insertion aid according to a third modification of the third embodiment of the present invention. FIG. 26 is a half sectional view showing an endoscope insertion aid according to a fourth embodiment of the present invention. FIG. 27 is an explanatory diagram showing a first operation when attaching the endoscope insertion aid of the fourth embodiment of FIG. 26 to an endoscope insertion portion; FIG. 28 is an explanatory diagram showing a first operation when attaching the endoscope insertion aid of the fourth embodiment of FIG. 26 to the endoscope insertion portion; FIG. 29 is a cross-sectional view showing a state in which the endoscope insertion aid according to the fourth embodiment of FIG. 26 is attached to an endoscope insertion portion; FIG. 30 is an explanatory view showing a comparative example for explaining the operation of the fourth embodiment in FIG. 26; FIG. 31 is an explanatory diagram illustrating a first example of the operation of attaching the endoscope insertion aid of FIG. 30 to the endoscope insertion portion. FIG. 32 is an explanatory diagram illustrating a second example of the operation of attaching the endoscope insertion aid of FIG. 30 to the endoscope insertion portion. FIG. 33 is a half-sectional view of an endoscope insertion aid according to a first modification of the fourth embodiment of the present invention. FIG. 34 is a half cross-sectional view of an endoscope insertion aid according to a second modification of the fourth embodiment of the present invention. FIG. 35 is a half cross-sectional view of an endoscope insertion aid according to a third modification of the fourth embodiment of the present invention. [Description of Signs] 1 endoscope device 2 endoscope 3 endoscope insertion assisting tool 11 endoscope insertion section 12 operating section 21 distal end section 22 bending section 23 flexible section 31 fixed Part 32 ... Fin-like projection 33 ... Hard part 34 ... Soft part
Claims (1)
定される固定部と、 体腔内への挿入方向に対して斜め後方または後方に向か
って突出した状態で前記固定部に少なくとも１つ接続さ
れる柔軟な薄肉状のヒレ状突起部と、 を具備し、前記固定部を前記内視鏡挿入部に固定した状
態でこの内視鏡挿入部を体腔管内で引き操作するとき、
前記ヒレ状突起部が体腔管壁に当接することで、体腔管
内での前記内視鏡挿入部の位置を保持する内視鏡挿入補
助具であって、 前記ヒレ状突起部の周縁部分の少なくとも一部を、前記
ヒレ状突起部が前記固定部に接続される部分の一部より
も軟性にしたことを特徴とする内視鏡挿入補助具。Claims: 1. A fixing part integrally or detachably fixed to an endoscope insertion part, and said fixing part is projected obliquely rearward or rearward with respect to a direction of insertion into a body cavity. And a flexible thin fin-shaped projection connected to at least one fixing part. The endoscope insertion part is pulled in a body cavity tube while the fixing part is fixed to the endoscope insertion part. When operating
An endoscope insertion aid that holds a position of the endoscope insertion portion in a body cavity tube by the fin-shaped protrusion abutting on a body cavity tube wall, wherein at least a peripheral portion of the fin-shaped protrusion portion is provided. An endoscope insertion aid, wherein a part of the fin-shaped protrusion is made softer than a part of a part connected to the fixing part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002149540A JP2003339631A (en) | 2002-05-23 | 2002-05-23 | Endoscope insertion assisting tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002149540A JP2003339631A (en) | 2002-05-23 | 2002-05-23 | Endoscope insertion assisting tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2003339631A true JP2003339631A (en) | 2003-12-02 |
Family
ID=29767674
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2002149540A Withdrawn JP2003339631A (en) | 2002-05-23 | 2002-05-23 | Endoscope insertion assisting tool |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2003339631A (en) |
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| JP2006192088A (en) * | 2005-01-14 | 2006-07-27 | Pentax Corp | Distal end part of endoscope to be inserted into large intestine |
| JP2006192087A (en) * | 2005-01-14 | 2006-07-27 | Pentax Corp | Distal end part of endoscope to be inserted into large intestine |
| JP2006192091A (en) * | 2005-01-14 | 2006-07-27 | Pentax Corp | Distal end part of endoscope to be inserted into large intestine |
| JP2006192090A (en) * | 2005-01-14 | 2006-07-27 | Pentax Corp | Distal end part of endoscope to be inserted into large intestine |
| JP2006192086A (en) * | 2005-01-14 | 2006-07-27 | Pentax Corp | Distal end part of endoscope to be inserted into large intestine |
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-
2002
- 2002-05-23 JP JP2002149540A patent/JP2003339631A/en not_active Withdrawn
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