JP3964962B2 - Large intestine insertion device - Google Patents

Large intestine insertion device Download PDF

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Publication number
JP3964962B2
JP3964962B2 JP16907497A JP16907497A JP3964962B2 JP 3964962 B2 JP3964962 B2 JP 3964962B2 JP 16907497 A JP16907497 A JP 16907497A JP 16907497 A JP16907497 A JP 16907497A JP 3964962 B2 JP3964962 B2 JP 3964962B2
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Japan
Prior art keywords
tube
air supply
tube body
large intestine
variable
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JP16907497A
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Japanese (ja)
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JPH119545A (en
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広之 山宮
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Olympus Corp
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Olympus Corp
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Description

【0001】
【発明の属する技術分野】
本発明は、診断あるいは検査の際に大腸に挿入される大腸挿入機器に関する。
【0002】
【従来の技術】
近年、細長の挿入部を体腔内に挿入することにより、切開を行うことなく、体腔内の検査対象部位を観察したり、必要に応じ、処置具を用いて治療処置の行える内視鏡が広く利用されている。
【0003】
上記内視鏡の挿入部は、屈曲した挿入経路内に挿通させることが可能なように可撓性を有している。しかし、前記挿入部に可撓性を持たせたことによって、挿入部手元側の操作に対して、細長な挿入部の先端側に観察光学系を備えた先端部分を所望の方向に定めることが難く、先端部をスムーズに目的部位まで挿通させるためには高度な技術を必要としていた。
【0004】
特に、内視鏡の挿入部を経肛門的に大腸に挿入して診断や治療を行う場合、大腸が直腸、S状結腸、下行結腸、左結腸曲部、横行結腸と連続した屈曲部やたるみ部分からなっているので、可撓性を有する挿入部をスムーズに目的部位まで挿通させることが極めて難しいという問題があった。
【0005】
このため、内視鏡を大腸に挿入する際、柔軟な内視鏡挿入部に対してある程度の硬さを持たせるスライディングチューブと呼ばれるこしの強いチューブ体を装着して挿入を行うことがあった。しかし、前記チューブ体は、S状結腸を直線状に保つだけのものであり、S状結腸の屈曲状態やたるみ状態を、挿入部が最も挿通させ易い状態である直線化させることができなかった。
【0006】
そこで、特公平5−39612号公報にはS状結腸の屈曲状態やたるみ状態及び横行結腸のたるみ状態などを強制的に小さくして内視鏡の挿入部を容易に挿通させるための大腸用内視鏡の挿入補助具が示されている。この大腸用内視鏡の挿入補助具は、挿入部に対してスライド自在に外嵌される可撓性のチューブと、このチューブの先端部外周面に設けられたバルーンと、上記チューブに設けられ一端が上記バルーンに連通した送気路と、この送気路の他端に設けられ上記バルーンへ給気してこれを膨張させる送気手段と、上記チューブの軸方向に沿って穿設された通路と、この通路に挿通された上記チューブの先端部を湾曲させるためのワイヤとを具備しており、腸管の屈曲状態やたるみ状態をとって直線化するため、チューブの先端部に設けたバルーンを膨張させた後、先端部にこの膨張したバルーンを配置させた状態でチューブを手元側に引き寄せて、腸管の直線化を図るものである。
【0007】
【発明が解決しようとする課題】
しかしながら、上述した特公平5−39612号公報の大腸用内視鏡の挿入補助具では、膨張したバルーンを先端部に配置した状態でチューブを手元側に引き寄せる一度の操作で、確実に腸管の屈曲やたるみをとって直線化できないことがあった。このような場合には、バルーンを収縮させてチューブの再挿入を行い、バルーンを再び膨張させた後、チューブを手元側に引き寄せる作業を再度行う。つまり、腸管の屈曲やたるみがとれるまでこれら一連の作業を繰り返し行わなければならず、操作が煩わしく術者にかかる負担が大きくなるという問題があった。
【0008】
本発明は上記事情に鑑みてなされたものであり、操作性に優れ、腸管の屈曲状態やたるみ状態をとって、大腸への挿入を容易にする大腸挿入機器を提供することを目的にしている。
【0009】
【課題を解決するための手段】
請求項1に記載の大腸挿入機器は、長尺な挿入部と、前記挿入部の外周部に沿って螺旋状に形成されるとともに膨張収縮可能な複数のチューブ体を備え、当該チューブ体の膨張収縮に基いて大腸壁面に接触しながら前記挿入部先端側から基端側に向けて変動する変動部と、を具備し、前記チューブ体は、所定のピッチにて巻回された第1のチューブ体と、当該第1のチューブ体に沿って前記ピッチ内に配設された第2のチューブ体とを備えてなることを特徴とする。
請求項2に記載の大腸挿入機器は、長尺な挿入部と、前記挿入部に配設された複数の送気管路と、前記送気管路に接続され、前記送気管路に気体を供給するための気体発生部と、前記気体発生部から発生される気体の前記複数の送気管路への供給を選択的に制御する制御手段と、前記挿入部の外周部に沿って螺旋状に形成されるとともに前記送気管路に夫々接続され、前記制御手段の制御に基いて膨張収縮可能な複数のチューブ体を有する変動部と、を具備し、前記チューブ体は、所定のピッチにて巻回された第1のチューブ体と、当該第1のチューブ体に沿って前記ピッチ内に配設された第2のチューブ体とを備え、前記制御手段は、前記気体発生部から発生される気体を前記第1のチューブ体と前記第2のチューブ体とに対して選択的に供給することを特徴とする。
【0010】
この構成によれば、変動部が大腸壁面に接触しながら挿入部先端側から基端側に向けて変動することによって大腸の屈曲やたるみがなくなる。
【0011】
【発明の実施の形態】
以下、図面を参照して本発明の実施の形態を説明する。
図1ないし図5は本発明の一実施形態に係り、図1は内視鏡の概略構成を示す説明図、図2は可撓管部に設けた変動部の構成を示す断面図、図3は空圧制御装置内の空圧制御部の概略構成を示す説明図、図4は各送気チューブ内の圧力の変化と時間の経過との関係を示す図、図5は可撓管部に設けた変動部の作用を説明する図である。
【0012】
図1に示すように本実施形態の大腸挿入機器は、例えば大腸に挿入される内視鏡1である。この内視鏡1は、操作ノブ2aが備えられた操作部2と細長な挿入部3とから構成されており、前記操作部2の側部には細長なユニバーサルコード4が設けられている。このユニバーサルコード4からは複数の後述する送気チューブを内挿した送気チューブ体5が延出しており、基端部を空圧制御装置6に接続している。
【0013】
前記挿入部3は、操作部2に基端部が連結された柔軟で可撓性を有する可撓管部7と、この可撓管部7の先端部に連設する複数の湾曲駒を連接して形成されている湾曲部8と、この湾曲部8の先端部に連設する観察画像を取り込むための電荷結合素子などの固体撮像素子を内蔵した先端部9とで構成されている。
【0014】
前記可撓管部7の湾曲部8側に位置する端部の外周部には腸管を手繰り寄せるための変動部10が設けられている。なお、前記湾曲部8は、前記操作部2に設けられている操作ノブ2aを操作することによって、可撓管部7内に挿通されている図示しない操作ワイヤが牽引操作されて湾曲する構成になっている。
【0015】
図2を参照して変動部10の構成を詳細に説明する。
図に示すように可撓管部7の湾曲部8側の外周部に設けられている変動部10は、この可撓管部7の外周面に対して螺旋状に巻回して設けられた例えば4本の膨張・収縮が可能な第1変動チューブ11,第2変動チューブ12,第3変動チューブ13,第4変動チューブ14と、前記変動チューブ11,12,13,14に一端部が連通固定されている第1送気チューブ5a,第2送気チューブ5b,第3送気チューブ5c,第4送気チューブ5dと、前記変動チューブ11,12,13,14を覆う膨張・収縮が可能な外皮15とで構成されている。
【0016】
前記外皮15の両端部は前記可撓管部7に糸巻き接着(不図示)などで固定されている。また、前記可撓管部7の外周部に螺旋状に巻回されている第1変動チューブ11,第2変動チューブ12,第3変動チューブ13,第4変動チューブ14の両端部は、それぞれチューブ内を気密状態に保持するために密閉状態になっている。前記送気チューブ5a,5b,5c,5dの他端部は内視鏡1の可撓管部7及び操作部2、ユニバーサルコード4内を通って空圧制御装置6に接続されている。
【0017】
図3に示すように空圧制御装置6内には前記第1送気チューブ5a,第2送気チューブ5b,第3送気チューブ5c,第4送気チューブ5dの他端部がそれぞれ接続される空圧制御部となる第1圧力制御弁31,第2圧力制御弁32,第3圧力制御弁33,第4圧力制御弁34と、圧縮空気発生部となる例えばコンプレッサ35と、このコンプレッサ35からそれぞれの圧力制御弁31,32,33,34に圧縮空気を供給する第1給気チューブ41,第2給気チューブ42,第3給気チューブ43,第4給気チューブ44及び前記圧力制御弁31,32,33,34に電気的に接続されて弁の開閉状態を制御する制御回路36とが設けられている。
【0018】
このことにより、前記コンプレッサ35で発生する圧縮空気は、各給気チューブ41,42,43,44を通って各圧力制御弁31,32,33,34まで到達する。そして、制御回路36からの制御信号によって各圧力制御弁31,32,33,34が開状態になることによって、この圧力制御弁31,32,33,34を通過した圧縮空気か各送気チューブ5a,5b,5c,5dに供給されていく。
【0019】
前記制御回路36では、前記コンプレッサ35から第1給気チューブ41,第2給気チューブ42,第3給気チューブ43,第4給気チューブ44に供給された圧縮空気を、所定のタイミングで、前記第1送気チューブ5a,第2送気チューブ5b,第3送気チューブ5c,第4送気チューブ5dに供給するように、前記第1圧力制御弁31,第2圧力制御弁32,第3圧力制御弁33及び第4圧力制御弁34を開閉制御している。
【0020】
具体的には、前記制御回路36からの制御信号によって、第1圧力制御弁31,第2圧力制御弁32,第3圧力制御弁33及び第4圧力制御弁34を開閉制御することによって、図4に示すように前記第1送気チューブ5a,第2送気チューブ5b,第3送気チューブ5c及び第4送気チューブ5d内の圧力を時間の経過と共に変化させて順次ピーク値を迎えるように加圧、減圧している。
【0021】
このことによって、コンプレッサ35で発生した圧縮空気は、第1給気チューブ41,第2給気チューブ42,第3給気チューブ43,第4給気チューブ44を通って、制御回路36によって制御されている第1圧力制御弁31,第2圧力制御弁32,第3圧力制御弁33,第4圧力制御弁34まで送られる。
【0022】
これら圧力制御弁31,32,33,34まで送られた圧縮空気は、制御回路36からの制御信号によって開閉制御されている前記第1圧力制御弁31,第2圧力制御弁32,第3圧力制御弁33,第4圧力制御弁34がそれぞれ開状態になることによって、第1送気チューブ5a,第2送気チューブ5b,第3送気チューブ5c及び第4送気チューブ5dを介して第1変動チューブ11,第2変動チューブ12,第3変動チューブ13,第4変動チューブ14に送られる。
【0023】
このとき、前記送気チューブ5a,5b,5c,5d内の圧力は、制御回路36によって前記図4に示すように制御されているので、前記送気チューブ5a,5b,5c,5dの内部圧力の変化に応じて第1変動チューブ11,第2変動チューブ12,第3変動チューブ13,第4変動チューブ14が膨縮する。
【0024】
すなわち、前記第1変動チューブ11,第2変動チューブ12,第3変動チューブ13,第4変動チューブ14は、図4に示す第1送気チューブ5a,第2送気チューブ5b,第3送気チューブ5c,第4送気チューブ5dの内部圧力の変化に伴って、第1変動チューブ11,第2変動チューブ12,第3変動チューブ13,第4変動チューブ14,第1変動チューブ11 … の順で、膨張・収縮を繰り返し行うので、外皮15の外周面が各チューブ11,12,13,14の膨張・収縮に伴って膨張・収縮して、先端側から手元側に膨張部が変動して、あたかも波が伝搬するような動きをする。なお、加圧のピーク値は、各変動チューブ11,12,13,14の最大膨張量に必ずしも対応させる必要はなく、任意に膨張量を設定できるようにしてもよい。
【0025】
上述のように構成した内視鏡1の作用を説明する。
まず、内視鏡1の挿入部3を肛門から直腸に挿入する。このとき、前記可撓管部7に設けられている変動部10の外皮15は収縮した状態であり、この状態で直腸からS状結腸後部付近まで手で挿入されていく。そして、内視鏡1の先端部9がS状結腸後部に到達したとき空圧制御装置6を作動させる。
【0026】
すると、装置6内のコンプレッサ35が駆動されて圧縮空気が発生する。このコンプレッサ35で発生した圧縮空気は、給気チューブ41,42,43,44、制御回路36によって制御されている圧力制御弁31,32,33,34、送気チューブ5a,5b,5c,5dを通って第1変動チューブ11,第2変動チューブ12,第3変動チューブ13,第4変動チューブ14に送られる。
【0027】
このとき、前記送気チューブ5a,5b,5c,5d内の圧力は、制御回路36によって前記図4に示すように制御されているので、これら送気チューブ5a,5b,5c,5dの内部圧力の変化に応じて変動チューブ11,12,13,14が膨縮を繰り返し行う。このことによって、図5(a)に示すように外皮15の外周面が膨張・収縮を繰り返して、膨張部が先端側から手元側に移動して、あたかも波が伝搬するような動きを開始する。
【0028】
外皮15の外周面の膨張部があたかも波が伝搬するように先端側から手元側に移動を繰り返すことにより、この膨張部が大腸のひだにひっかかり、この膨張部の移動に伴って大腸のひだが基端部側に送られていく。つまり、腸管が手元側に移動される。そして、図5(a)に示したS状結腸の屈曲部を、同図(b)に示すように直線化して、内視鏡1の挿入部3をスムーズに挿通させることが可能になる。
【0029】
また、前記内視鏡1の先端部9が横行結腸にかかったとき、空圧制御装置6を作動させることによって上述したと同様に変動部10を作用させることによって横行結腸のたるみをとって、内視鏡1をスムーズに挿通させていくことができる。
【0030】
このように、内視鏡の挿入部を形成している可撓管部の湾曲部側の外周面に複数の両端部が密閉されている膨縮可能な変動チューブを螺旋状に配設して、これら変動チューブを膨縮可能な外皮で被覆した変動部を設け、この変動部を構成する複数の変動チューブにコンプレッサからの圧縮空気を制御・供給して、これら変動チューブを覆う外皮の外周面を順次膨張・収縮させて、外周面の膨張部があたかも波が伝搬するように先端側から手元側に移動させることによって、膨張部が大腸の屈曲部やたるみ部に接触しながら基端側に引き寄せて大腸を直線化することができる。このことにより、変動部を構成している変動チューブへ圧縮空気を供給する作業によって大腸の屈曲部やたるみ部を自動的に手元側に引き寄せて大腸の直線化を図れるので、内視鏡の挿入部を大腸内に挿通させる作業性を大幅に向上させることができる。
【0031】
なお、図6に示すように変動部10を可撓管部7の湾曲部8側に設ける代わりに、変動部10を湾曲部8の外周面に設けるようにしてもよい。このことにより、変動部10を構成している変動チューブ11,12,13,14へ圧縮空気を供給することによって、大腸の屈曲部やたるみ部を自動的に手元側に引き寄せて大腸の直線化を図って、内視鏡1の挿入部3を大腸内に挿通させる作業性を大幅に向上させることができると共に、図に示すように湾曲部8が腸の湾曲した部分に位置していた場合、腸を湾曲形状に沿わせて引き寄せることができるので、この湾曲部8によって引き寄せの妨げを防止することができる。
【0032】
図7ないし図9は本発明の第1参考例に係り、図7は外套管の概略構成を示す説明図、図8は外套管の挿入部を構成するマルチルーメンチューブの長手方向軸に対して直交する面の断面図、図9は外套管に設けた変動部の作用を説明する図である。
【0033】
図7に示すように本参考例では内視鏡が挿通可能な内孔を備えた外套管50の挿入部51の先端部分の外周面に変動部60を設けている。なお、符号52は外套管50の握り部である。
【0034】
図に示す挿入部51は、マルチルーメンチューブ53と、このマルチルーメンチューブ53の先端に取り付けられる先端キャップ54とによって構成されている。
【0035】
図8に示すように前記マルチルーメンチューブ53は、長手方向に貫通する複数の透孔を有し、図示しない内視鏡の挿入部を挿通することが可能なメインルーメン53aを中心部に配置し、このメインルーメン53aの周囲に例えば4つの送気用ルーメン53b,53c,53d,53eを配置している。
【0036】
図7に示した前記先端キャップ54には、前記メインルーメン53aと略同径の開口54aが形成されている。この先端キャップ54は、マルチルーメンチューブ53の先端面に対して接着によって固定されており、この先端キャップ54をマルチルーメンチューブ53に接着することによって、このマルチルーメンチューブ53に形成されている送気用ルーメン53b,53c,53d,53eの先端側開口を気密状態に塞いでいる。また、先端キャップ54をマルチルーメンチューブ53の先端面に接着固定した状態で、内視鏡の挿入部が開口54a内をスムーズに挿通する。
【0037】
前記マルチルーメンチューブ53の先端側部の外周面に設けられている変動部60は、膨張・収縮が可能な膨縮チューブ体61と、この膨縮チューブ体61を覆う膨張・収縮が可能な外皮チューブ体62とで構成されている。なお、前記膨縮チューブ体61を覆う外皮チューブ体62の両端部はマルチルーメンチューブ53に接着剤などによって密着固定されている。
【0038】
前記膨縮チューブ体61は、マルチルーメンチューブ53の外周面に沿って所定の間隔で周方向に接着固定されており、周方向に設けた接着部と接着部との間に形成される気密された空間部を膨縮可能な空気室63,64,65,66,67,68,69,70としている。
【0039】
前記マルチルーメンチューブ53の側面には前記送気用ルーメン53bと前記空気室63,67とを連通する連通孔71、前記送気用ルーメン53cと前記空気室64,68とを連通する連通孔72、前記送気用ルーメン53dと前記空気室65,69とを連通する連通孔73、前記送気用ルーメン53eと前記空気室66,70とを連通する連通孔74が所定の間隔で所定の位置に設けられている。
【0040】
また、前記マルチルーメンチューブ53に形成されている各送気用ルーメン53b,53c,53d,53eには空圧制御装置6に接続されている送気チューブ体5を挿通している送気チューブ5a、5b、5c、5dの一端部が連通している。なお、前記空圧制御装置6は、前記第1実施形態で説明した空圧制御装置であり、前記図4に示したタイミングで送気チューブ5a、5b、5c、5dを介して送気用ルーメン53b,53c,53d,53eに圧縮空気を送り込む。
【0041】
すなわち、空圧制御装置6のコンプレッサで発生した圧縮空気は、給気チューブ,圧力制御弁,送気チューブ5a,5b,5c,5dを介して送気用ルーメン53b,53c,53d,53eに送り込まれ、連通孔71,72,73,74を介して空気室63,64,65,66,67,68,69,70に供給される。
【0042】
このとき、前記送気チューブ5a,5b,5c,5d内の圧力は、前記図4で示したように制御されているので、この送気チューブ5a,5b,5c,5dの内部圧力の変化に応じて空気室63,67、空気室64,68、空気室65,69、空気室66,70が膨縮する。
【0043】
すなわち、前記連通孔71を介して送気用ルーメン53bに連通する空気室63,67、前記連通孔72を介して送気用ルーメン53cに連通する空気室64,68、前記連通孔73を介して送気用ルーメン53dに連通する空気室65,69、前記連通孔74を介して送気用ルーメン53eに連通する空気室66,70は、前記図4に示した第1送気チューブ5a,第2送気チューブ5b,第3送気チューブ5c,第4送気チューブ5dの内部圧力の変化に伴って、空気室63,67、空気室64,68、空気室65,69、空気室66,70、空気室63,67 … の順で、膨張・収縮を繰り返し行うので、外皮チューブ体62の外周面が各空気室63,64,65,66,67,68,69,70の膨張・収縮に伴って膨張・収縮して、先端側から手元側に膨張部が変動して、あたかも波が伝搬するような動きをする。
【0044】
上述のように構成した外套管50の作用を説明する。
まず、外套管50の挿入部51を肛門から直腸に挿入する。このとき、前記挿入部51を構成するマルチルーメンチューブ53に設けられている変動部60の外皮チューブ体62は収縮した状態であり、この状態で直腸からS状結腸後部付近まで手で挿入されていく。そして、外套管50を構成する先端キャップ54の先端部がS状結腸後部に到達したとき空圧制御装置6を作動させる。
【0045】
すると、装置6内のコンプレッサが駆動されて圧縮空気が発生する。このコンプレッサで発生した圧縮空気は、給気チューブ、圧力制御弁、送気チューブ5a,5b,5c,5d、送気用ルーメン53b,53c,53d,53e、各送気用ルーメン53b,53c,53d,53eに形成されている連通孔71,72,73,74を通ってそれぞれの空気室63,64,65,66,67,68,69,70に送り込まれる。
【0046】
このとき、前記送気チューブ5a,5b,5c,5d内の圧力は、前記図4に示したように制御されているので、これら送気チューブ5a,5b,5c,5dの内部圧力の変化に応じて空気室63,67、空気室64,68、空気室65,69、空気室66,70が膨縮を繰り返し行う。このことによって、図9(a)に示すように外皮チューブ体62の外周面が膨張・収縮を繰り返して、膨張部が先端側から手元側に移動して、あたかも波が伝搬するような動きを開始する。
【0047】
外皮チューブ体62の外周面の膨張部があたかも波が伝搬するように先端側から手元側に移動を繰り返すことにより、この膨張部が大腸のひだにひっかかり、この膨張部の移動に伴って大腸のひだが基端部側に送られていく。そして、図9(a)に示したS状結腸の屈曲部を、同図(b)に示すように直線化して、外套管50の挿入部51をスムーズに挿通させていくことが可能になる。そして、外套管50を構成するマルチルーメンチューブ53のメインルーメン53aを通じて内視鏡を大腸内に挿通する。なお、マルチルーメンチューブ53に設けた変動部60を同様に作用させることによって横行結腸のたるみをとって直線化が可能になる。
【0048】
このように、外套管の挿入部を構成するマルチルーメンチューブの先端部に設けた変動部を膨縮させて、外周面の膨張部があたかも波が伝搬するように先端側から手元側に移動させることによって、膨張部が大腸の屈曲部やたるみ部に接触して基端側に引き寄せて大腸を直線化することができる。このことにより、大腸の屈曲部やたるみ部を自動的に手元側に引き寄せて外套管を目的部位まで挿入した後、メインルーメンを通じて内視鏡を大腸の目的部位まで容易に挿通することができる。
【0049】
図10及び図11は本発明の第2参考例に係り、図10は内視鏡に設けた変動部の構成を示す説明図、図11は内視鏡の操作部内に設けた駆動部の概略構成を示す図である。
【0050】
図10に示すように本参考例の内視鏡の挿入部80は、先端側より順に先端部81、湾曲部82、可撓管部83を連接している。前記可撓管部83には長手軸方向に対して移動可能な変動部84が設けられている。この変動部84には膨張・収縮可能な膨張体85が設けられている。
【0051】
この膨張体85には送気チューブ86の一端部が接続されており、この送気チューブ86を介して図示しない空圧制御装置で発生された圧縮空気が前記膨張体85内に供給されるようになっている。
【0052】
また、前記変動部84の基端面側にはこの変動部84を基端側に移動させる後方移動ワイヤ87の一端部が固定されている。この後方移動ワイヤ87の他端部は後述する操作部内に配設されている歯付きベルトの一端部に固定されている。一方、前記変動部84の先端面側にはこの変動部84を先端側に移動させる前方移動ワイヤ88の一端部が固定されている。この前方移動ワイヤ88の他端部は後述する操作部内に配設されている歯付きベルトの他端部に固定されている。なお、前記前方移動ワイヤ88は、可撓管部83の湾曲部82側に突出して設けられているピン89にかけられた状態になっている。
【0053】
図11に示すように前記後方移動ワイヤ87の他端部及び後方移動ワイヤ87の他端部が固定されている歯付きベルト91を備えた移動機構である駆動部90は前記内視鏡の操作部内に配設されており、前記歯付きベルト91と、この歯付きベルト91を噛合して巻回したプーリー92と、このプーリー92が固設され回動自在な出力軸93aを備えたエンコーダ付きモータ93と、このエンコーダ付きモータ93を駆動制御するモータ制御装置94とで構成されている。
なお、前記モータ制御装置94と前記空圧制御部とは電気的に接続されている。
【0054】
上述のように構成した内視鏡の作用を説明する。
まず、内視鏡の挿入部80を例えば肛門から直腸に挿入する。このとき、前記挿入部80に設けられている変動部84は前記ピン89に当接しており、この変動部84に設けられている膨張体85が収縮した状態になっている。
【0055】
内視鏡の先端部がS状結腸後部に到達したとき空圧制御装置を作動させる。すると、装置内のコンプレッサが駆動されて圧縮空気が発生する。このコンプレッサで発生した圧縮空気は、送気チューブ86を介して膨張体85に供給されていく。そして、前記膨張体85内に所定量の圧縮空気が供給されると、前記空圧制御装置の制御回路からモータ制御装置94に駆動信号が出力される。このとき、膨張体85は図に示す膨らんだ状態になる。
【0056】
ここで、前記空圧制御装置からの駆動信号を受けたモータ制御装置94ではプーリ92を図中時計回り方向に所定量回転させるようにエンコーダ付きモータ93を駆動させる。
【0057】
前記エンコーダ付きモータ93が駆動することによって、前記プーリ92が時計方向に所定角度回転する。すると、このプーリ92に巻回されている歯付きベルト91が移動して、この歯付きベルト91に固定されている後方移動ワイヤ87が牽引される一方、前方移動ワイヤ88が弛緩状態になる。つまり、膨らんだ状態の膨張体85を備えた変動部84が基端側に移動していく。このとき、前記膨張体85が大腸のひだにひっかかり、この膨張体85の移動に伴って大腸のひだが基端側に送られていく。
【0058】
次に、前記モータ93が所定角度回転すると、このモータ93の駆動が停止され、空圧制御装置を介して膨張体85を収縮状態にする。前記膨張体85が収縮すると、今度は前記プーリ92を反時計方向に同角度回転させるようにモータ制御装置94からモータ93に制御信号が出力される。このことによって、プーリ92が反時計方向に所定角度回転する。すると、前方移動ワイヤ88が牽引される一方、後方移動ワイヤ87を弛緩状態になって収縮した膨張体85を備えた変動部84が初期位置に戻ってくる。
【0059】
次いで、前記変動部84が初期位置に戻ると上述したように膨張体85を膨らんだ状態にした変動部84が基端側に移動して、大腸のひだを基端側に送っていく。
【0060】
したがって、腸管は、膨張体85が膨張した状態の変動部84が基端側に移動するとき把持されて手許側に送られていくので、この動作を繰り返し行うことによりたるみがとれて直線状になる。
【0061】
このように、膨張体を膨縮させると共に、膨張体を備えた変動部を膨張体膨張時に基端側に、膨張体収縮時に先端側に所定量繰り返し移動させることによって、大腸を自動的に手元側に手繰り寄せることができる。このことにより、確実に腸管を手許側に手繰り寄せて大腸の屈曲やたるみをとって、内視鏡が容易に挿入される。
【0062】
なお、本発明は、以上述べた実施形態のみに限定されるものではなく、発明の要旨を逸脱しない範囲で種々変形実施可能である。
【0063】
[付記]
以上詳述したような本発明の上記実施形態によれば、以下の如き構成を得ることができる。
【0064】
(1)大腸に挿入される細長な挿入部を備える大腸挿入機器において、
大腸内に挿入される前記挿入部の外周部に、大腸壁面に接触しながら挿入部先端側から基端側に向けて変動する変動部を設けた大腸挿入機器。
【0065】
(2)前記変動部は、前記挿入部の外周面に少なくとも1つ設けた膨縮可能な膨張体であり、
この膨張体が先端側から手元側に連続的又は断続的に変動する付記1記載の大腸挿入機器。
【0066】
(3)前記膨張体を連続的に変形させて、腸管を手元側に移動させる付記2記載の大腸挿入機器。
【0067】
(4)前記変動部を内視鏡に設けた付記1記載の大腸挿入機器。
【0068】
(5)前記変動部を内視鏡の湾曲部よりも基端側に設けた付記4記載の大腸挿入機器。
【0069】
(6)前記変動部を内視鏡の挿入部を挿通することが可能な外套管に設けた付記1記載の大腸挿入機器。
【0070】
(7)長手軸方向に複数設けた膨張体と、
これら複数の膨張体を覆う外皮と、
前記複数の膨張体を先端側から手元側へ順次加圧、減圧する空圧制御装置とを備える大腸挿入機器。
【0071】
(8)前記複数の膨張体を、長手軸方向に対して螺旋状に設けた付記7記載の大腸挿入機器。
【0072】
(9)軸方向に移動可能な膨張体と、
この膨張体を軸方向に移動させる移動機構と、
前記膨張体を加圧、減圧する空圧制御装置とを備える大腸挿入機器。
【0073】
【発明の効果】
以上説明したように本発明によれば、操作性に優れ、腸管の屈曲状態やたるみ状態をとって、大腸への挿入を容易にする大腸挿入機器を提供することができる。
【図面の簡単な説明】
【図1】図1ないし図5は本発明の一実施形態に係り、図1は内視鏡の概略構成を示す説明図
【図2】可撓管部に設けた変動部の構成を示す断面図
【図3】空圧制御装置内の空圧制御部の概略構成を示す説明図
【図4】各送気チューブ内の圧力の変化と時間の経過との関係を示す図
【図5】可撓管部に設けた変動部の作用を説明する図
【図6】変動部を湾曲部に設けた内視鏡を説明する図
【図7】図7ないし図9は本発明の第1参考例に係り、図7は外套管の概略構成を示す説明図
【図8】外套管の挿入部を構成するマルチルーメンチューブの長手方向軸に対して直交する面の断面図
【図9】外套管に設けた変動部の作用を説明する図
【図10】図10及び図11は本発明の第2参考例に係り、図10は内視鏡に設けた変動部の構成を示す説明図
【図11】内視鏡の操作部内に設けた駆動部の概略構成を示す図
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a large intestine insertion device that is inserted into the large intestine at the time of diagnosis or examination.
[0002]
[Prior art]
2. Description of the Related Art In recent years, endoscopes capable of observing a region to be inspected in a body cavity without performing an incision by inserting an elongated insertion portion into the body cavity or performing a therapeutic treatment using a treatment tool as necessary are widely used. It's being used.
[0003]
The insertion portion of the endoscope has flexibility so that it can be inserted into a bent insertion path. However, by providing the insertion portion with flexibility, the distal end portion having the observation optical system on the distal end side of the elongated insertion portion can be determined in a desired direction with respect to the operation on the insertion portion proximal side. It was difficult, and advanced technology was required to smoothly insert the tip to the target site.
[0004]
In particular, when the insertion part of the endoscope is inserted transanally into the large intestine for diagnosis or treatment, the large intestine is connected to the rectum, the sigmoid colon, the descending colon, the left colon bent part, the transverse colon, the bent part or sagging Since it consists of parts, there was a problem that it was extremely difficult to smoothly insert the flexible insertion portion to the target site.
[0005]
For this reason, when inserting an endoscope into the large intestine, there was a case where a rigid tube body called a sliding tube that gives a certain degree of hardness to a flexible endoscope insertion portion was attached and inserted. . However, the tube body only keeps the sigmoid colon in a straight line, and the bending state and the sagging state of the sigmoid colon cannot be linearized, which is the state in which the insertion part is most easily inserted. .
[0006]
Therefore, Japanese Patent Publication No. 5-39612 discloses a large intestine for facilitating insertion of an endoscope insertion portion by forcibly reducing the bending state or sagging state of the sigmoid colon and the sagging state of the transverse colon. An endoscope insertion aid is shown. The insertion aid for the large intestine endoscope includes a flexible tube that is slidably fitted to the insertion portion, a balloon provided on the outer peripheral surface of the distal end portion of the tube, and the tube. An air supply path having one end communicating with the balloon, an air supply means provided at the other end of the air supply path for supplying air to the balloon and inflating the air balloon, and being drilled along the axial direction of the tube A balloon provided at the distal end portion of the tube, including a passage and a wire for bending the distal end portion of the tube inserted through the passage, and linearizing the bent state and sagging state of the intestinal tract After inflating the tube, the tube is pulled toward the proximal side with the inflated balloon disposed at the tip, thereby straightening the intestinal tract.
[0007]
[Problems to be solved by the invention]
However, in the aforementioned insertion aid for a large intestine endoscope disclosed in Japanese Patent Publication No. 5-39612, the intestinal tract is reliably bent by a single operation of pulling the tube toward the proximal side with the inflated balloon disposed at the distal end. There was a case where it was not possible to make a straight line due to slack. In such a case, the balloon is deflated, the tube is reinserted, the balloon is inflated again, and then the operation of drawing the tube toward the hand side is performed again. That is, the series of operations must be repeated until the intestinal tract is bent or sagging, and there is a problem that the operation is cumbersome and the burden on the operator is increased.
[0008]
The present invention has been made in view of the above circumstances, and an object thereof is to provide a large intestine insertion device that is excellent in operability, takes in a bent state or a slack state of the intestinal tract, and facilitates insertion into the large intestine. .
[0009]
[Means for Solving the Problems]
The large intestine insertion device according to claim 1 includes a long insertion portion and a plurality of tube bodies that are spirally formed along the outer peripheral portion of the insertion portion and that can expand and contract, and the tube body expands. A variable portion that varies from the distal end side to the proximal end side of the insertion portion while contacting the colon wall surface based on the contraction; The tube body includes a first tube body wound at a predetermined pitch, and a second tube body disposed in the pitch along the first tube body. It is characterized by that.
The large intestine insertion device according to claim 2 is connected to the long insertion portion, a plurality of air supply conduits arranged in the insertion portion, and the air supply conduit, and supplies gas to the air supply conduit. And a control means for selectively controlling supply of the gas generated from the gas generating section to the plurality of air supply pipes, and a spiral shape along the outer peripheral portion of the insertion section. And a variable portion having a plurality of tube bodies that are respectively connected to the air supply conduit and can be expanded and contracted based on the control of the control means. The tube body includes a first tube body wound at a predetermined pitch, and a second tube body disposed in the pitch along the first tube body, The control means selectively supplies the gas generated from the gas generator to the first tube body and the second tube body. It is characterized by that.
[0010]
According to this configuration, the bending portion and the sagging of the large intestine are eliminated by the variable portion changing from the distal end side to the proximal end side while contacting the large intestine wall surface.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
1 to 5 relate to an embodiment of the present invention, FIG. 1 is an explanatory diagram showing a schematic configuration of an endoscope, FIG. 2 is a sectional view showing a configuration of a variable portion provided in a flexible tube portion, and FIG. Is an explanatory diagram showing a schematic configuration of an air pressure control unit in the air pressure control device, FIG. 4 is a diagram showing a relationship between a change in pressure in each air supply tube and the passage of time, and FIG. It is a figure explaining the effect | action of the provided fluctuation | variation part.
[0012]
As shown in FIG. 1, the large intestine insertion device of this embodiment is an endoscope 1 inserted into the large intestine, for example. The endoscope 1 includes an operation unit 2 provided with an operation knob 2 a and an elongated insertion unit 3, and an elongated universal cord 4 is provided on the side of the operation unit 2. An air supply tube body 5 in which a plurality of air supply tubes to be described later is inserted extends from the universal cord 4, and a base end portion is connected to the pneumatic control device 6.
[0013]
The insertion portion 3 connects a flexible and flexible flexible tube portion 7 whose base end portion is connected to the operation portion 2 and a plurality of bending pieces connected to the distal end portion of the flexible tube portion 7. And a distal end portion 9 incorporating a solid-state imaging device such as a charge coupled device for capturing an observation image connected to the distal end portion of the curved portion 8.
[0014]
On the outer peripheral portion of the end portion of the flexible tube portion 7 located on the curved portion 8 side, a variable portion 10 for pulling the intestinal tract is provided. The bending portion 8 is configured such that an operation wire (not shown) inserted into the flexible tube portion 7 is pulled and operated to bend by operating an operation knob 2 a provided in the operation portion 2. It has become.
[0015]
The configuration of the changing unit 10 will be described in detail with reference to FIG.
As shown in the figure, the variable portion 10 provided on the outer peripheral portion of the flexible tube portion 7 on the curved portion 8 side is provided by being spirally wound around the outer peripheral surface of the flexible tube portion 7, for example. The first variable tube 11, the second variable tube 12, the third variable tube 13, the fourth variable tube 14, and one of the variable tubes 11, 12, 13, 14 are fixed in communication with each other. The first air supply tube 5a, the second air supply tube 5b, the third air supply tube 5c, the fourth air supply tube 5d, and the variable tubes 11, 12, 13, 14 can be expanded and contracted. It is composed of an outer skin 15.
[0016]
Both end portions of the outer skin 15 are fixed to the flexible tube portion 7 by thread-winding bonding (not shown) or the like. Further, both ends of the first variable tube 11, the second variable tube 12, the third variable tube 13, and the fourth variable tube 14 spirally wound around the outer peripheral portion of the flexible tube portion 7 are respectively tubes. In order to keep the inside airtight, it is sealed. The other ends of the air supply tubes 5 a, 5 b, 5 c, 5 d are connected to the pneumatic control device 6 through the flexible tube 7, the operation unit 2, and the universal cord 4 of the endoscope 1.
[0017]
As shown in FIG. 3, the other ends of the first air supply tube 5a, the second air supply tube 5b, the third air supply tube 5c, and the fourth air supply tube 5d are connected to the air pressure control device 6, respectively. A first pressure control valve 31, a second pressure control valve 32, a third pressure control valve 33, a fourth pressure control valve 34 that serve as an air pressure control unit, a compressor 35 that serves as a compressed air generation unit, and the compressor 35 The first air supply tube 41, the second air supply tube 42, the third air supply tube 43, the fourth air supply tube 44 and the pressure control for supplying compressed air to the respective pressure control valves 31, 32, 33, 34 from A control circuit 36 is provided which is electrically connected to the valves 31, 32, 33 and 34 and controls the open / closed state of the valves.
[0018]
As a result, the compressed air generated in the compressor 35 reaches the pressure control valves 31, 32, 33, 34 through the air supply tubes 41, 42, 43, 44. Then, each pressure control valve 31, 32, 33, 34 is opened by the control signal from the control circuit 36, so that the compressed air passing through the pressure control valve 31, 32, 33, 34 or each air supply tube 5a, 5b, 5c and 5d are supplied.
[0019]
In the control circuit 36, the compressed air supplied from the compressor 35 to the first air supply tube 41, the second air supply tube 42, the third air supply tube 43, and the fourth air supply tube 44 is sent at a predetermined timing. The first pressure control valve 31, the second pressure control valve 32, the second air supply tube 5a, the second air supply tube 5b, the third air supply tube 5c, and the fourth air supply tube 5d are supplied to the first air supply tube 5a, the second air supply tube 5b, and the fourth air supply tube 5d. The 3 pressure control valve 33 and the 4th pressure control valve 34 are controlled to open and close.
[0020]
Specifically, the first pressure control valve 31, the second pressure control valve 32, the third pressure control valve 33, and the fourth pressure control valve 34 are controlled to be opened and closed by a control signal from the control circuit 36, so that FIG. As shown in FIG. 4, the pressures in the first air supply tube 5a, the second air supply tube 5b, the third air supply tube 5c, and the fourth air supply tube 5d are changed with the passage of time so that the peak values are successively reached. Is pressurized and depressurized.
[0021]
Thus, the compressed air generated in the compressor 35 is controlled by the control circuit 36 through the first air supply tube 41, the second air supply tube 42, the third air supply tube 43, and the fourth air supply tube 44. The first pressure control valve 31, the second pressure control valve 32, the third pressure control valve 33, and the fourth pressure control valve 34 are sent.
[0022]
The compressed air sent to these pressure control valves 31, 32, 33, and 34 is controlled to open and close by a control signal from the control circuit 36, the first pressure control valve 31, the second pressure control valve 32, and the third pressure. When the control valve 33 and the fourth pressure control valve 34 are opened, the first air supply tube 5a, the second air supply tube 5b, the third air supply tube 5c, and the fourth air supply tube 5d are used. The first fluctuation tube 11, the second fluctuation tube 12, the third fluctuation tube 13, and the fourth fluctuation tube 14 are sent.
[0023]
At this time, since the pressure in the air supply tubes 5a, 5b, 5c, 5d is controlled as shown in FIG. 4 by the control circuit 36, the internal pressure of the air supply tubes 5a, 5b, 5c, 5d is controlled. The first fluctuation tube 11, the second fluctuation tube 12, the third fluctuation tube 13, and the fourth fluctuation tube 14 are expanded and contracted in accordance with the change.
[0024]
That is, the first fluctuation tube 11, the second fluctuation tube 12, the third fluctuation tube 13, and the fourth fluctuation tube 14 are the same as the first air supply tube 5a, the second air supply tube 5b, and the third air supply tube shown in FIG. The first fluctuation tube 11, the second fluctuation tube 12, the third fluctuation tube 13, the fourth fluctuation tube 14, the first fluctuation tube 11 and so on in accordance with changes in the internal pressure of the tube 5c and the fourth air supply tube 5d. Since the expansion / contraction is repeated, the outer peripheral surface of the outer skin 15 expands / contracts with the expansion / contraction of the tubes 11, 12, 13, 14 and the inflating portion changes from the distal end side to the proximal side. It moves as if the wave propagates. The peak value of pressurization does not necessarily correspond to the maximum expansion amount of each of the variable tubes 11, 12, 13, and 14, and the expansion amount may be arbitrarily set.
[0025]
The operation of the endoscope 1 configured as described above will be described.
First, the insertion part 3 of the endoscope 1 is inserted into the rectum from the anus. At this time, the outer skin 15 of the variable portion 10 provided in the flexible tube portion 7 is in a contracted state, and in this state, it is manually inserted from the rectum to the vicinity of the back of the sigmoid colon. Then, when the distal end portion 9 of the endoscope 1 reaches the rear portion of the sigmoid colon, the pneumatic control device 6 is operated.
[0026]
Then, the compressor 35 in the apparatus 6 is driven and compressed air is generated. The compressed air generated by the compressor 35 is supplied from the supply tubes 41, 42, 43, 44, the pressure control valves 31, 32, 33, 34 controlled by the control circuit 36, and the air supply tubes 5a, 5b, 5c, 5d. The first fluctuation tube 11, the second fluctuation tube 12, the third fluctuation tube 13, and the fourth fluctuation tube 14 are passed through.
[0027]
At this time, since the pressure in the air supply tubes 5a, 5b, 5c, 5d is controlled as shown in FIG. 4 by the control circuit 36, the internal pressure of these air supply tubes 5a, 5b, 5c, 5d is controlled. The change tubes 11, 12, 13, and 14 are repeatedly expanded and contracted in accordance with the change. As a result, as shown in FIG. 5A, the outer peripheral surface of the outer skin 15 repeats expansion and contraction, and the expansion portion moves from the distal end side to the proximal side, and starts to move as if the wave propagates. .
[0028]
By repeating the movement of the inflated portion on the outer peripheral surface of the outer skin 15 from the distal end side to the proximal side so that the wave propagates, the inflated portion catches on the folds of the large intestine, and the folds of the large intestine are moved along with the movement of the inflated portion. It is sent to the base end side. That is, the intestinal tract is moved to the hand side. Then, the bent portion of the sigmoid colon shown in FIG. 5A is linearized as shown in FIG. 5B, and the insertion portion 3 of the endoscope 1 can be smoothly inserted.
[0029]
Further, when the distal end portion 9 of the endoscope 1 is placed on the transverse colon, the slack of the transverse colon is obtained by operating the variable portion 10 in the same manner as described above by operating the pneumatic control device 6. The endoscope 1 can be smoothly inserted.
[0030]
In this way, a flexible tube that can be expanded and contracted, in which a plurality of both end portions are sealed, is arranged in a spiral shape on the outer peripheral surface of the flexible tube portion that forms the insertion portion of the endoscope. An outer peripheral surface of the outer skin that covers these variable tubes by providing a variable portion that covers these variable tubes with a skin that can be expanded and contracted, and controlling and supplying compressed air from the compressor to a plurality of variable tubes that constitute the variable portions Are expanded and contracted sequentially, and the expanded portion on the outer peripheral surface is moved from the distal end side to the proximal side as if the wave propagates, so that the expanded portion is brought into contact with the bent portion or the slack portion of the large intestine while moving toward the proximal end side. It can be drawn to straighten the large intestine. As a result, it is possible to straighten the large intestine by linearly pulling the bent or slack portion of the large intestine by supplying compressed air to the variable tube constituting the variable portion. The workability of inserting the part into the large intestine can be greatly improved.
[0031]
As shown in FIG. 6, instead of providing the fluctuation portion 10 on the bending portion 8 side of the flexible tube portion 7, the fluctuation portion 10 may be provided on the outer peripheral surface of the bending portion 8. As a result, by supplying compressed air to the variable tubes 11, 12, 13, and 14 constituting the variable part 10, the bent part and the slack part of the large intestine are automatically drawn toward the proximal side to linearize the large intestine. The workability of inserting the insertion portion 3 of the endoscope 1 into the large intestine can be greatly improved, and the bending portion 8 is located at a curved portion of the intestine as shown in the figure. Since the intestine can be drawn along the curved shape, the curved portion 8 can prevent the drawing from being hindered.
[0032]
7 to 9 show the present invention. In the first reference example FIG. 7 is an explanatory view showing a schematic configuration of the outer tube, FIG. 8 is a cross-sectional view of a surface perpendicular to the longitudinal axis of the multi-lumen tube constituting the insertion portion of the outer tube, and FIG. 9 is provided in the outer tube. It is a figure explaining the effect | action of the changed part.
[0033]
As shown in FIG. In this reference example Is provided with a variable portion 60 on the outer peripheral surface of the distal end portion of the insertion portion 51 of the outer tube 50 having an inner hole through which the endoscope can be inserted. Reference numeral 52 denotes a grip portion of the outer tube 50.
[0034]
The insertion portion 51 shown in the figure is configured by a multi-lumen tube 53 and a tip cap 54 attached to the tip of the multi-lumen tube 53.
[0035]
As shown in FIG. 8, the multi-lumen tube 53 has a plurality of through holes penetrating in the longitudinal direction, and a main lumen 53a through which an insertion portion of an endoscope (not shown) can be inserted is arranged at the center. For example, four air supply lumens 53b, 53c, 53d, and 53e are disposed around the main lumen 53a.
[0036]
The tip cap 54 shown in FIG. 7 is formed with an opening 54a having substantially the same diameter as the main lumen 53a. The distal end cap 54 is fixed to the distal end surface of the multi-lumen tube 53 by adhesion, and the air supply formed in the multi-lumen tube 53 by adhering the distal end cap 54 to the multi-lumen tube 53. The distal end side openings of the lumens 53b, 53c, 53d, and 53e for use are sealed in an airtight state. In addition, with the distal end cap 54 adhered and fixed to the distal end surface of the multi-lumen tube 53, the insertion portion of the endoscope smoothly passes through the opening 54a.
[0037]
The variable portion 60 provided on the outer peripheral surface of the distal end side portion of the multi-lumen tube 53 includes an expansion / contraction tube body 61 that can be expanded / contracted, and an expandable / contractible skin that covers the expansion / contraction tube body 61. It consists of a tube body 62. Note that both end portions of the outer tube body 62 covering the expansion / contraction tube body 61 are firmly fixed to the multi-lumen tube 53 with an adhesive or the like.
[0038]
The expansion / contraction tube body 61 is bonded and fixed in the circumferential direction at a predetermined interval along the outer peripheral surface of the multi-lumen tube 53, and is airtight formed between the bonding portion provided in the circumferential direction. The air chambers 63, 64, 65, 66, 67, 68, 69, and 70 that can be expanded and contracted are used.
[0039]
On the side surface of the multi-lumen tube 53, a communication hole 71 that communicates the air supply lumen 53 b and the air chambers 63, 67, and a communication hole 72 that communicates the air supply lumen 53 c and the air chambers 64, 68. The communication hole 73 that communicates the air supply lumen 53d and the air chambers 65 and 69, and the communication hole 74 that communicates the air supply lumen 53e and the air chambers 66 and 70, at predetermined positions. Is provided.
[0040]
In addition, an air supply tube 5a in which an air supply tube body 5 connected to an air pressure control device 6 is inserted into each of the air supply lumens 53b, 53c, 53d, 53e formed in the multi-lumen tube 53. One end portions of 5b, 5c, and 5d communicate with each other. The air pressure control device 6 is the air pressure control device described in the first embodiment, and the air supply lumen is provided via the air supply tubes 5a, 5b, 5c, and 5d at the timing shown in FIG. Compressed air is sent into 53b, 53c, 53d, and 53e.
[0041]
That is, the compressed air generated by the compressor of the air pressure control device 6 is sent to the air supply lumens 53b, 53c, 53d, and 53e through the air supply tubes, the pressure control valves, and the air supply tubes 5a, 5b, 5c, and 5d. Then, the air is supplied to the air chambers 63, 64, 65, 66, 67, 68, 69, 70 through the communication holes 71, 72, 73, 74.
[0042]
At this time, since the pressure in the air supply tubes 5a, 5b, 5c, and 5d is controlled as shown in FIG. 4, the internal pressure of the air supply tubes 5a, 5b, 5c, and 5d is changed. Accordingly, the air chambers 63 and 67, the air chambers 64 and 68, the air chambers 65 and 69, and the air chambers 66 and 70 expand and contract.
[0043]
That is, the air chambers 63 and 67 communicated with the air supply lumen 53b through the communication hole 71, the air chambers 64 and 68 communicated with the air supply lumen 53c through the communication hole 72, and the communication hole 73. The air chambers 65 and 69 communicating with the air supply lumen 53d and the air chambers 66 and 70 communicating with the air supply lumen 53e via the communication hole 74 are respectively connected to the first air supply tube 5a shown in FIG. The air chambers 63 and 67, the air chambers 64 and 68, the air chambers 65 and 69, and the air chamber 66 are associated with changes in the internal pressure of the second air supply tube 5b, the third air supply tube 5c, and the fourth air supply tube 5d. , 70, and air chambers 63, 67... Are repeatedly expanded and contracted in this order, so that the outer peripheral surface of the outer tube body 62 expands and contracts the air chambers 63, 64, 65, 66, 67, 68, 69, 70. It expands and contracts as it contracts From the tip side fluctuates inflatable portion proximally, as if the motion as a wave propagates.
[0044]
The operation of the outer tube 50 configured as described above will be described.
First, the insertion portion 51 of the mantle tube 50 is inserted into the rectum from the anus. At this time, the outer tube body 62 of the variable portion 60 provided in the multi-lumen tube 53 constituting the insertion portion 51 is in a contracted state, and in this state, it is manually inserted from the rectum to the vicinity of the back of the sigmoid colon. Go. Then, when the distal end portion of the distal end cap 54 constituting the outer tube 50 reaches the rear portion of the sigmoid colon, the pneumatic control device 6 is operated.
[0045]
Then, the compressor in the apparatus 6 is driven and compressed air is generated. Compressed air generated by this compressor is supplied from an air supply tube, a pressure control valve, air supply tubes 5a, 5b, 5c, 5d, air supply lumens 53b, 53c, 53d, 53e, and air supply lumens 53b, 53c, 53d. , 53e through the communication holes 71, 72, 73, 74, and sent to the air chambers 63, 64, 65, 66, 67, 68, 69, 70, respectively.
[0046]
At this time, since the pressure in the air supply tubes 5a, 5b, 5c, and 5d is controlled as shown in FIG. 4, the internal pressure of the air supply tubes 5a, 5b, 5c, and 5d is changed. Accordingly, the air chambers 63 and 67, the air chambers 64 and 68, the air chambers 65 and 69, and the air chambers 66 and 70 are repeatedly expanded and contracted. As a result, as shown in FIG. 9 (a), the outer peripheral surface of the outer tube body 62 repeats expansion and contraction, and the expansion portion moves from the distal end side to the proximal side, and moves as if the wave propagates. Start.
[0047]
By repeating the movement from the distal end side to the proximal side so that the wave propagates, the inflated portion on the outer peripheral surface of the outer tube body 62 gets caught in the folds of the large intestine, and as the inflated portion moves, The folds are sent to the base end side. Then, the bent portion of the sigmoid colon shown in FIG. 9A can be straightened as shown in FIG. 9B, and the insertion portion 51 of the mantle tube 50 can be smoothly inserted. . Then, the endoscope is inserted into the large intestine through the main lumen 53a of the multi-lumen tube 53 constituting the outer tube 50. In addition, by making the fluctuation | variation part 60 provided in the multi-lumen tube 53 act similarly, the slack of the transverse colon can be taken and linearization is attained.
[0048]
In this way, the variable portion provided at the distal end portion of the multi-lumen tube constituting the insertion portion of the outer tube is expanded and contracted, and the expanded portion on the outer peripheral surface is moved from the distal end side to the proximal side so that the wave propagates. As a result, the inflatable part can be brought into contact with the bent part or the sagging part of the large intestine and pulled toward the proximal end to linearize the large intestine. As a result, the bent portion or the sagging portion of the large intestine can be automatically pulled toward the proximal side and the mantle tube is inserted into the target site, and then the endoscope can be easily inserted through the main lumen to the target site of the large intestine.
[0049]
10 and 11 show the present invention. In the second reference example FIG. 10 is an explanatory diagram showing the configuration of the variable section provided in the endoscope, and FIG. 11 is a diagram showing the schematic configuration of the drive section provided in the operation section of the endoscope.
[0050]
As shown in FIG. Of this reference example The insertion portion 80 of the endoscope connects a distal end portion 81, a bending portion 82, and a flexible tube portion 83 in order from the distal end side. The flexible tube portion 83 is provided with a variable portion 84 that is movable in the longitudinal axis direction. The variable portion 84 is provided with an expandable body 85 that can expand and contract.
[0051]
One end of an air supply tube 86 is connected to the expansion body 85, and compressed air generated by an air pressure control device (not shown) is supplied into the expansion body 85 via the air supply tube 86. It has become.
[0052]
Further, one end portion of a backward moving wire 87 for moving the varying portion 84 to the proximal end side is fixed to the proximal end surface side of the varying portion 84. The other end portion of the backward moving wire 87 is fixed to one end portion of a toothed belt disposed in an operation portion described later. On the other hand, one end portion of a forward moving wire 88 for moving the varying portion 84 to the distal end side is fixed to the distal end surface side of the varying portion 84. The other end portion of the forward moving wire 88 is fixed to the other end portion of the toothed belt disposed in the operation portion described later. The forward moving wire 88 is in a state of being hooked on a pin 89 that protrudes toward the bending portion 82 side of the flexible tube portion 83.
[0053]
As shown in FIG. 11, the drive unit 90, which is a moving mechanism including a toothed belt 91 to which the other end portion of the rearward movement wire 87 and the other end portion of the rearward movement wire 87 are fixed, operates the endoscope. With an encoder provided with the toothed belt 91, a pulley 92 meshed with the toothed belt 91, and a rotatable output shaft 93a to which the pulley 92 is fixed. The motor 93 includes a motor control device 94 that controls the drive of the motor 93 with an encoder.
The motor control device 94 and the pneumatic control unit are electrically connected.
[0054]
The operation of the endoscope configured as described above will be described.
First, the insertion portion 80 of the endoscope is inserted into the rectum from the anus, for example. At this time, the changing portion 84 provided in the insertion portion 80 is in contact with the pin 89, and the expansion body 85 provided in the changing portion 84 is in a contracted state.
[0055]
When the distal end of the endoscope reaches the posterior sigmoid colon, the pneumatic control device is activated. Then, the compressor in the apparatus is driven to generate compressed air. The compressed air generated by the compressor is supplied to the expansion body 85 via the air supply tube 86. When a predetermined amount of compressed air is supplied into the expansion body 85, a drive signal is output from the control circuit of the pneumatic control device to the motor control device 94. At this time, the expansion body 85 is in the expanded state shown in the figure.
[0056]
Here, the motor control device 94 that has received the drive signal from the pneumatic control device drives the motor 93 with an encoder so as to rotate the pulley 92 by a predetermined amount in the clockwise direction in the drawing.
[0057]
When the encoder-equipped motor 93 is driven, the pulley 92 rotates clockwise by a predetermined angle. Then, the toothed belt 91 wound around the pulley 92 moves, the rear moving wire 87 fixed to the toothed belt 91 is pulled, and the front moving wire 88 is in a relaxed state. That is, the fluctuation | variation part 84 provided with the expansion body 85 of the swelled state moves to a base end side. At this time, the expansion body 85 is caught on the fold of the large intestine, and is sent to the fold end of the large intestine with the movement of the expansion body 85.
[0058]
Next, when the motor 93 rotates by a predetermined angle, the driving of the motor 93 is stopped, and the expansion body 85 is brought into a contracted state via the pneumatic control device. When the expansion body 85 contracts, a control signal is output from the motor control device 94 to the motor 93 so that the pulley 92 is rotated counterclockwise by the same angle. As a result, the pulley 92 rotates a predetermined angle in the counterclockwise direction. Then, while the forward movement wire 88 is pulled, the fluctuation | variation part 84 provided with the expansion body 85 which contracted the back movement wire 87 in the relaxed state returns to an initial position.
[0059]
Next, when the varying portion 84 returns to the initial position, the varying portion 84 having the expanded body 85 inflated as described above moves to the proximal end side, and sends the folds of the large intestine to the proximal end side.
[0060]
Therefore, the intestinal tract is gripped and sent to the hand side when the variable portion 84 in the state in which the inflatable body 85 is expanded moves to the proximal end side. Become.
[0061]
In this way, the inflating body is expanded and contracted, and the large intestine is automatically handed by repeatedly moving the variable portion provided with the inflating body to the proximal end side when the inflating body expands and to the distal end side when the expanding body contracts. You can pull to the side. As a result, the endoscope is easily inserted by reliably pulling the intestinal tract toward the palm of the hand and bending or sagging the large intestine.
[0062]
It should be noted that the present invention is not limited to the embodiments described above, and various modifications can be made without departing from the spirit of the invention.
[0063]
[Appendix]
According to the embodiment of the present invention as described above in detail, the following configuration can be obtained.
[0064]
(1) In a large intestine insertion device provided with an elongated insertion portion to be inserted into the large intestine,
A large intestine insertion device provided with a variable portion that varies from the distal end side of the insertion portion toward the proximal end side while being in contact with the wall surface of the large intestine on the outer peripheral portion of the insertion portion that is inserted into the large intestine.
[0065]
(2) The variable portion is an expandable body that can be expanded and contracted, provided at least one on the outer peripheral surface of the insertion portion,
The large intestine insertion device according to appendix 1, wherein the expanding body continuously or intermittently varies from the distal end side to the proximal side.
[0066]
(3) The large intestine insertion device according to appendix 2, wherein the inflating body is continuously deformed to move the intestinal tract toward the hand side.
[0067]
(4) The large intestine insertion device according to appendix 1, wherein the variable portion is provided in an endoscope.
[0068]
(5) The large intestine insertion device according to appendix 4, wherein the varying portion is provided on the proximal side with respect to the bending portion of the endoscope.
[0069]
(6) The large intestine insertion device according to appendix 1, wherein the varying portion is provided in an outer tube that can be inserted through an insertion portion of an endoscope.
[0070]
(7) a plurality of expansion bodies provided in the longitudinal axis direction;
An outer skin covering the plurality of expansion bodies,
A large intestine insertion device comprising an air pressure control device that sequentially pressurizes and decompresses the plurality of expansion bodies from the distal end side to the proximal side.
[0071]
(8) The large intestine insertion device according to appendix 7, wherein the plurality of expansion bodies are provided in a spiral shape with respect to the longitudinal axis direction.
[0072]
(9) an inflatable body movable in the axial direction;
A moving mechanism for moving the expansion body in the axial direction;
A large intestine insertion device comprising an air pressure control device for pressurizing and depressurizing the expandable body.
[0073]
【The invention's effect】
As described above, according to the present invention, it is possible to provide a large intestine insertion device that is excellent in operability and facilitates insertion into the large intestine by taking the bent or slack state of the intestinal tract.
[Brief description of the drawings]
FIG. 1 to FIG. 5 relate to an embodiment of the present invention, and FIG. 1 is an explanatory diagram showing a schematic configuration of an endoscope.
FIG. 2 is a cross-sectional view showing a configuration of a variable portion provided in a flexible tube portion
FIG. 3 is an explanatory diagram showing a schematic configuration of a pneumatic control unit in the pneumatic control device.
FIG. 4 is a diagram showing the relationship between the change in pressure in each air supply tube and the passage of time
FIG. 5 is a diagram for explaining the action of a variable portion provided in a flexible tube portion;
FIG. 6 is a diagram for explaining an endoscope in which a varying portion is provided in a bending portion.
7 to 9 show the present invention. In the first reference example FIG. 7 is an explanatory view showing a schematic configuration of the outer tube.
FIG. 8 is a cross-sectional view of a plane orthogonal to the longitudinal axis of a multi-lumen tube that constitutes the insertion portion of the outer tube
FIG. 9 is a diagram for explaining the action of the variable portion provided in the outer tube.
10 and 11 show the present invention. In the second reference example FIG. 10 is an explanatory diagram showing the configuration of the variable portion provided in the endoscope.
FIG. 11 is a diagram showing a schematic configuration of a drive unit provided in an operation unit of an endoscope.

Claims (5)

長尺な挿入部と、
前記挿入部の外周部に沿って螺旋状に形成されるとともに膨張収縮可能な複数のチューブ体を備え、当該チューブ体の膨張収縮に基いて大腸壁面に接触しながら前記挿入部先端側から基端側に向けて変動する変動部と、
を具備し、
前記チューブ体は、所定のピッチにて巻回された第1のチューブ体と、当該第1のチューブ体に沿って前記ピッチ内に配設された第2のチューブ体とを備えてなることを特徴とする大腸挿入機器。
A long insertion part,
A plurality of tube bodies that are spirally formed along the outer peripheral portion of the insertion portion and that can be expanded and contracted, and that are in contact with the colon wall surface based on the expansion and contraction of the tube body, from the distal end side to the insertion portion A variable part that fluctuates toward
Equipped with,
The tube body includes a first tube body wound at a predetermined pitch, and a second tube body disposed in the pitch along the first tube body. A large intestine insertion device.
長尺な挿入部と、
前記挿入部に配設された複数の送気管路と、
前記送気管路に接続され、前記送気管路に気体を供給するための気体発生部と、
前記気体発生部から発生される気体の前記複数の送気管路への供給を選択的に制御する制御手段と、
前記挿入部の外周部に沿って螺旋状に形成されるとともに前記送気管路に夫々接続され、前記制御手段の制御に基いて膨張収縮可能な複数のチューブ体を有する変動部と、
を具備し、
前記チューブ体は、所定のピッチにて巻回された第1のチューブ体と、当該第1のチューブ体に沿って前記ピッチ内に配設された第2のチューブ体とを備え、
前記制御手段は、前記気体発生部から発生される気体を前記第1のチューブ体と前記第2のチューブ体とに対して選択的に供給することを特徴とする大腸挿入機器。
A long insertion part,
A plurality of air supply conduits disposed in the insertion portion;
A gas generating unit connected to the air supply line and supplying gas to the air supply line;
Control means for selectively controlling the supply of the gas generated from the gas generating section to the plurality of air supply pipelines;
A variable portion having a plurality of tube bodies formed in a spiral shape along the outer peripheral portion of the insertion portion and connected to the air supply conduit, respectively, and capable of expanding and contracting based on the control of the control means,
Equipped with,
The tube body includes a first tube body wound at a predetermined pitch, and a second tube body disposed in the pitch along the first tube body,
The large intestine insertion device , wherein the control means selectively supplies the gas generated from the gas generating section to the first tube body and the second tube body .
前記制御手段は、前記第1のチューブ体と前記第2のチューブ体への気体の供給のタイミングを異なるように制御することを特徴とする請求項2に記載の大腸挿入機器。The large intestine insertion device according to claim 2, wherein the control means controls the timing of gas supply to the first tube body and the second tube body to be different. 前記チューブ体の外側には、当該チューブ体の膨張収縮に応じて変形する外皮が設けられていることを特徴とする請求項1または請求項2のいずれか一つに記載の大腸挿入機器。The large intestine insertion device according to any one of claims 1 and 2, wherein an outer skin that deforms in accordance with expansion and contraction of the tube body is provided outside the tube body. 前記送気管路と前記気体発生部との間には弁体が設けられ、A valve body is provided between the air supply pipe line and the gas generation unit,
前記制御手段は、前記弁体の切り換え制御を行なうことを特徴とする請求項2に記載の大腸挿入機器。  The large intestine insertion device according to claim 2, wherein the control means performs switching control of the valve body.
JP16907497A 1997-06-25 1997-06-25 Large intestine insertion device Expired - Fee Related JP3964962B2 (en)

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JP16907497A JP3964962B2 (en) 1997-06-25 1997-06-25 Large intestine insertion device

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JP16907497A JP3964962B2 (en) 1997-06-25 1997-06-25 Large intestine insertion device

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JP2006140566A Division JP2006223895A (en) 2006-05-19 2006-05-19 Intestinal intubation apparatus

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JPH119545A JPH119545A (en) 1999-01-19
JP3964962B2 true JP3964962B2 (en) 2007-08-22

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JP4504003B2 (en) * 2003-12-16 2010-07-14 オリンパス株式会社 Endoscope insertion assist device
US7947013B2 (en) * 2004-01-09 2011-05-24 G.I. View Ltd. Pressure-propelled system for body lumen
JP2006192091A (en) * 2005-01-14 2006-07-27 Pentax Corp Distal end part of endoscope to be inserted into large intestine
JP2006223895A (en) * 2006-05-19 2006-08-31 Olympus Corp Intestinal intubation apparatus
JP2010221010A (en) 2009-02-26 2010-10-07 Fujifilm Corp Actuator for moving body in tube, method for controlling the same, and endoscope

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