JP3639522B2

JP3639522B2 - Rectal catheter

Info

Publication number: JP3639522B2
Application number: JP2000355745A
Authority: JP
Inventors: 重信高根
Original assignee: Create Medic Co Ltd
Current assignee: Create Medic Co Ltd
Priority date: 2000-11-22
Filing date: 2000-11-22
Publication date: 2005-04-20
Anticipated expiration: 2020-11-22
Also published as: JP2002153563A

Description

【０００１】
【発明の属する技術分野】
本発明は、検査や治療のために人間の肛門から直腸・大腸・結腸に薬剤や空気を注入し、腸内より注入物及び排泄物を排出するために用いる直腸カテーテルに関する。
【０００２】
【従来の技術】
従来において、検査や治療のために人間の肛門から薬剤や空気を注入するには、直腸カテーテルの基端に設けられた接続部分にチューブを接続し、直腸カテーテルを肛門に挿入し、チューブのもう一端から薬剤をポンプで圧送して、薬剤を肛門内に送り込む。送り込んだ薬剤を排泄物とともに排出するには、接続部分に接続した別のチューブの端からポンプで吸引して、腸内へ送り込んだ薬剤を排泄物とともに排出する。
ポンプを止めた状態において、薬剤・空気の送り込みを止めかつ逆流を防ぎ、又は吸引した排泄物の腸内への逆流を防ぐ閉止弁は、従来においては直腸カテーテルの基端のチューブとの接続部分に設けられていた。
この従来の直腸カテーテルでは、特に直腸カテーテルでバリウムを送って直腸を造影して撮影に移ろうとする際、カテーテル本体内に残留したバリウムが、直腸内に流れ込んで造影をくずしてしまうことが再々起こるという問題点があった。
近年においては、腸内を造影して撮影を行う際に、撮影される人を処置台に固定して処置台の向き、位置を自在に変更して適確な位置で撮影を行うことが増えてきており、頭が上を向く状態や頭が下を向く状態になることにより、よりカテーテル本体内に残留したバリウムが、直腸内に流れ込みやすくなるので、より大きな問題点になっていた。
【０００３】
【発明が解決しようとする課題】
本発明が解決しようとする課題は、従来のこれらの問題点を解消し、カテーテル本体内の残留している薬剤が腸内に流出しないようにでき、造影による撮影が良好に行えるようにし、処置がスムーズに行えるようにし、処置される人の負担を減らすことができる直腸カテーテルを提供することにある。
【０００４】
【課題を解決するための手段】
かかる課題を解決した本発明の構成は、
１）腸内に挿入されるカテーテル本体内に薬剤を腸内に送る薬剤注入路と腸内から排泄物を排出する排泄路とを設け、薬剤の注入圧で変形して薬剤を通過させかつ所定圧力以下では薬剤注入路内の薬剤を吐出させない抵抗体を薬剤注入路の先端部に設け、しかも同抵抗体は薬剤注入路の先端部を塞ぐ形状のものに直線的切り目を設けた構造とし、使用中に薬剤注入路内に残留した薬剤が腸内に流れ出るのを抑制したことを特徴とする直腸カテーテル
２）腸内に挿入されるカテーテル本体内に薬剤を腸内に送る薬剤注入路と腸内から排泄物を排出する排泄路とを設け、同薬剤注入路の先端部に所定以上の圧力が負荷されると開いて薬剤を通す閉止弁を薬剤注入路の先端部の路中に設け、使用中に薬剤注入路内に残留した薬剤が腸内に流れ出るのを抑制したことを特徴とする直腸カテーテル
３）カテーテル本体内に薬剤を腸内に送る薬剤注入路と腸内から排泄物を排出する排泄路とを設け、前後に作用する所定の圧力差で変形して排泄物を通過させる抵抗体を排泄路の先端部に設け、しかも同抵抗体は排泄路の先端部を塞ぐ形状のものに直線的切り目を設けた構造とした、前記１）又は２）記載の直腸カテーテル
４）カテーテル本体内に薬剤を腸内に送る薬剤注入路と腸内から排泄物を排出する排泄路とを設け、腸内から排泄路へ向かう方向にのみ排泄物を通す逆止弁を排泄路の先端部に設けた前記１）又は２）記載の直腸カテーテル
にある。
【０００５】
【作用】
本発明では、肛門から腸内に挿入したカテーテル本体内に設けた薬剤注入路を通して薬剤を圧送する。この薬剤の腸内への注入圧が薬剤注入路の先端部に設けた抵抗体を変形させ、薬剤が通過できるよう開口し、薬剤が腸内に吐出する。薬剤の腸内への注入が終了すると、薬剤注入路内に薬剤が残留するが圧力が低いので抵抗体を開口させることができず、腸内へ流出しない。
薬剤注入路の先端部に閉止弁を設けたものは、薬剤注入路内を流れる薬剤の腸内への注入圧が薬剤注入路の先端部に設けた閉止弁を開き、薬剤注入路の先端より腸内へ吐出する。薬剤の腸内への注入が終了すると、薬剤注入路内に薬剤が残留するが圧力が低く所定圧力を超えないので、閉止弁は閉じた状態となり残留した薬剤が腸内へ流出しない。
排泄路の先端部に抵抗体を設けたものは、肛門から腸内に挿入したカテーテル本体の排泄路の後方から吸引することによって、抵抗体後方の圧力を低くし、抵抗体前後の圧力差を大きくして抵抗体を変形させて排泄物が通過できるよう開口し、排泄物が腸内からカテーテル本体の排泄路内を通って排出させる。吸引による排出が終了して排泄路内に残った排泄物は、圧力が腸内より高くなることがないので抵抗体を変形させて腸内に逆流しない。
排泄路の先端部に逆止弁を設けたものは、逆止弁が腸内から排泄路へ向かう方向にのみ排泄物を通すので、吸引した排泄路内の排泄物は腸内に逆流しない。
薬剤注入路と排泄路の先端部のそれぞれの路中に外部で操作する開閉弁を設けたものは、薬剤注入の際又は排泄物排出の際に外部操作によってそれぞれの開閉弁を開いて薬剤の注入又は排泄物の排出をそれぞれの路の吐出口より行い、使用しない状態では外部操作によってそれぞれの開閉弁を閉じて薬剤注入路内に残留した薬剤が腸内へ流出しないようにし、かつ排泄路内に取り込んだ排泄物が腸内に逆流しないようにする。
【０００６】
【発明の実施の形態】
本発明において、抵抗体，逆止弁又は閉止弁によってカテーテル本体内に残留する薬剤，空気又は排泄物を漏れ出さないように又は逆流しないようにした状態では、造影による撮影の際に問題にならないようなバリウムの少量の漏れや、処置される人が不快に思わないような少量の排泄物の逆流は発生してもよいものとする。
外部で操作する開閉弁は、空気や水の注入・注出によって開閉するものなどがあり、腸内に漏れ出てしまうようなことがあっても人体に影響を与えないものが好ましい。
本発明において、抵抗体と閉止弁は逆止弁としての機能を有してもよいものとする。
共通路とその吐出口の間に抵抗体や開閉弁を設けるものは、その吐出口、又はその吐出口となるカテーテル先端部に設けるものを含むものとする。
【０００７】
【実施例】
本発明の各実施例について図面を参照して具体的に説明する。
実施例１（図１〜４参照）
図１〜４に示す実施例１はカテーテル本体内に薬剤注入路と排泄路を設け、それぞれの先端部分に抵抗体を設けるようにした直腸カテーテルの例である。
図１は実施例１の直腸カテーテルのカテーテル本体の先端部分を示す説明図である。図２は実施例１の直腸カテーテルの説明図である。図３は実施例１の直腸カテーテルの抵抗体の動きを示す説明図である。図４は実施例１の直腸カテーテルの抵抗体の説明図である。
図中、１は直腸カテーテル、２はカテーテル本体、３は薬剤注入路、３ａは薬剤注入路の先端部分に設けた抵抗体、４は排泄路、４ａは排泄路の先端部分に設けた抵抗体、５は空気注入路、５ａは空気注入路の先端部分に設けた抵抗体、７はカテーテル先端部、７ａはカテーテル先端部開口、８は薬剤注入路接続部、９は排泄路接続部、１０は空気注入路接続部、１１はバルーン用空気通路接続部、１２は薬剤注入チューブ、１３は排泄チューブ、１４は空気注入チューブ、１５は空気チューブ、１６は薬剤注入装置、１７は排泄物回収装置、１８は空気注入装置、１９はバルーン制御装置、２０はバルーンである。
【０００８】
実施例１の直腸カテーテル１は、図１〜４に示すように人の肛門から腸内に挿入できる長いかつ適度に軟らかい材質の棒状のカテーテル本体２内部に、カテーテル本体２の長手方向に沿ってカテーテル本体２を貫通するように薬剤注入路３、排泄路４、空気注入路５をそれぞれが分離するように設ける。さらにカテーテル本体２の長手方向に沿ってカテーテル本体２の先端近くの所定の位置から後端まで伸びるように２箇所に図示しないバルーン用空気通路を設ける。
【０００９】
次に、図２に示すように薬剤注入路３，排泄路４，空気注入路５の先端部分に抵抗体３ａ，４ａ，５ａを設ける。抵抗体３ａ，４ａ，５ａは薬剤注入路３，排泄路４，空気注入路５を先端部で塞ぐ形状のものに直線状の切れ目を設けたものである。この抵抗体３ａ，４ａ，５ａは受けた力によって変形することにより切れ目部分が開口する。この開口は、抵抗体３ａ，４ａ，５ａの変形に対応して大きくなるようにする。
【００１０】
次にカテーテル本体２の先端にカテーテル先端部７を設ける。カテーテル先端部７は肛門に挿入しやすいように先端に行くに従って縮径する形状になっている。また、カテーテル先端部７には複数のカテーテル先端部開口７ａを設けてカテーテル本体２の先端つまり、各抵抗体３ａ，４ａ，５ａの前方が外部と連通するようにしている。
【００１１】
次に薬剤注入路３の後端には、チューブに接続するための薬剤注入路接続部８を設け、排泄路４の後端には、チューブに接続するための排泄路接続部９を設け、空気注入路５の後端には、チューブに接続するための空気注入路接続部１０を設け、バルーン用空気通路の後端には、チューブに接続するためのバルーン用空気通路接続部１１を設ける。
次に薬剤注入路接続部８に薬剤注入チューブ１２の一端を接続し、さらに薬剤注入チューブ１２のもう一端を薬剤注入装置１６に接続する。次に排泄路接続部９に排泄チューブ１３の一端を接続し、さらに排泄チューブ１３のもう一端を排泄物回収装置１７に接続する。次に空気注入路接続部１０に空気注入チューブ１４の一端を接続し、空気注入チューブ１４のもう一端を空気注入装置１８に接続する。次にバルーン用空気通路接続部１１に空気チューブ１５の一端を接続し、さらに空気チューブ１５のもう一端をバルーン制御装置１９に接続する。
次にカテーテル本体２の先端部の所定の間隔で離れた２箇所に内部への空気の注入・注出で膨縮するバルーン２０を設け、バルーン２０をバルーン用空気通路にそれぞれ接続する。
【００１２】
本実施例１の直腸カテーテル１は、カテーテル本体２を肛門より腸内に挿入し、バルーン制御装置１９でバルーン２０に空気を送ってバルーン２０を肛門の内外で膨張させ、カテーテル本体２を人ｈに固定する。
次に薬剤注入装置１６，空気注入装置１８によって腸内に空気と薬剤として造影剤であるバリウムを注入する。
バリウムが注入される際には、図３，４に示すようにバリウムに圧力をかけて圧送するので、バリウムがカテーテル本体２の先端まで来るとバリウムが薬剤注入路３の抵抗体３ａに圧力をかけることになる。圧力を受けた抵抗体３ａは、受けた圧力の分変形して切れ目が開くように開口し、この開口部分を通ってバリウムが腸内に流れ込む。（図３（ｂ），（ｃ），図４（ｂ））必要に応じて腸内に空気を送る場合にも圧送された空気が空気注入路５の抵抗体５ａに圧力をかけ、抵抗体５ａを変形させ、切れ目部分を開口させて腸内に空気が流れるようにする。
バリウムを腸内に送るのを停止すると、バリウムはカテーテル本体の薬剤注入路３内に残留するが、残留圧力は低いため抵抗体３ａを変形させないため、腸内に流れ込むことはほぼない。
空気についても同様に腸内に送るのを停止すると、空気はカテーテル本体２の空気注入路５内に残留するが、残留圧力は低いため抵抗体５ａを変形させないため、腸内に流れ込むことはほとんどない。
よって、このように薬剤注入路３の先端に抵抗体３ａを設けることによってバリウムを腸内に送った後に、さらにバリウムがカテーテル本体から腸内に流れ出てしまうようなことがないので、造影をくずしてしまうようなことがなく安定して確実に撮影ができる。さらに、安定して造影による撮影ができることによって、処置・検査がスムーズに行え、やり直しが起こりにくくして処置・検査の時間・検査が増えるのを抑制して処置される人の負担を少なくすることができる。
【００１３】
このようにしてバリウムで造影した腸の撮影が終了したならば、排泄物回収装置１７を作動させ、吸引する。吸引されることによって排泄路４の先端の抵抗体４ａの吸引側には負圧がかかり、抵抗体４ａの先端側には腸内のバリウムと排泄物の圧力がかかる。腸内のバリウムと排泄物の圧力だけでは抵抗体４ａの切れ目部分が開口するほど抵抗体４ａは変形しないが、反対側に負圧がかかることにより差圧として大きくなるので抵抗体４ａが変形し切れ目部分が開口してこの開口部分をバリウムと排泄物が通って排出される。よって、排泄物回収装置１７を作動させない状態では、腸内のバリウムと排泄物が排泄路４に流れ込んだり、一度、排泄路４内に取り込んだバリウムと排泄物が腸内に戻ってしまうようなことがなく、処置される人に与える不快感を抑えることができる。
【００１４】
実施例２（図５〜９参照）
図５〜９に示すのは、薬剤注入路の先端部に閉止弁を設け、排泄路の先端部に逆止弁を設けた直腸カテーテルの例である。
図５は実施例２の直腸カテーテルのカテーテル本体の先端部分を示す説明図である。図６は実施例２の直腸カテーテルの閉止弁の動きを示す説明図である。図７は実施例２の直腸カテーテルのカテーテル本体の先端部分を示す説明図である。図８は実施例２の直腸カテーテルの逆止弁の動きを示す説明図である。図９は実施例２の直腸カテーテルの逆止弁の説明図である。
図中、２１は閉止弁、２１ａは弁体、２１ｂは支持部、２２は逆止弁である。
実施例２では、図５に示すように薬剤注入路３の先端部分に閉止弁２１を設け、排泄路４の先端部分に逆止弁２２を設ける。
閉止弁２１は、図５〜７に示すように薬剤注入路３の先端の開口を覆うように塞ぐことができる弁体２１ａを支持部２１ｂで薬剤注入路３の先端開口に押し付けるようにして設ける。また、弁体２１ａの薬剤注入路側には薬剤注入路の先端開口部分に挿入でき、所定以上の力が加わると薬剤注入路の先端開口部への挿入が保持できなくなる挿入部を設ける。
逆止弁２２は、図５，８，９に示すように排泄路４のカテーテル本体２の基端側に行くに従って内部通路が徐々に偏平状に狭くなるようにし、後端で内部通路が切れ目になる形状にし、かつ内部に物が通過する際には押し拡げられるように切れ目及び内部通路が開くことができるようにしている。
【００１５】
本実施例２では、薬剤注入路３内に薬剤を圧送すると、薬剤注入路３の先端に取り付けた閉止弁２１の弁体２１ａの挿入部分を押すように薬剤の圧力がかかり、図６（ｂ）に示すように弁体２１ａが薬剤注入路３の先端開口の上方に移動する。これによって先端開口が比較的急激に大きく開口することになり薬剤が吐出する。
薬剤の圧送中には、吐出する力が常に弁体２１ａを開く方向に力が加わるため、弁体２１ａが薬剤注入路３の先端開口を開口させた状態が保持される。薬剤の圧送が終了したならば、弁体２１ａに薬剤の吐出による力が加わらないようになるため、支持部２１ｂによって弁体２１ａは薬剤注入路３の先端開口に押し付けられるようにして先端開口を閉じる。弁体２１ａは薬剤が圧送されて所定の力を受けないと開弁しないので、カテーテル本体を肛門に挿入した使用中に、薬剤注入路３内の薬剤がさらに腸内に流れ出してしまうことがない。
さらに、造影による撮影が終了し、腸内に注入した薬剤と排泄物を強制的に排出させる際には、図８（ｂ），図９（ｂ）に示すように逆止弁２２の後方に吸引されることによって、逆止弁２２の前後の圧力差が大きくなり、逆止弁２２の内部を押し広げるようにして腸内の薬剤と排泄物が逆止弁２２を通過して吸引される。このようにして薬剤と排泄物が吸引されて排泄物回収装置１７を停止した後に、排泄路４内に回収した薬剤と排泄物が残留している状態において、逆流しようとしても、逆流圧は逆止弁２２の偏平形状をより偏平にしようと力を加えてしまうため、逆止弁２２を開口させることができない。よって逆流して回収した薬剤や排泄物が腸内に戻ってしまうことがなく、処置される人に不快感を与えないようにできる。
その他符号、構成、作用、使い方は実施例１と同じである。
【００１６】
【発明の効果】
本発明によれば、カテーテル本体の残留物が腸内に流出しないようにでき、造影による撮影が良好に行えるようにし、処置がスムーズに行えるようにし、処置される人の負担を減らすことができる直腸カテーテルにできる。
薬剤注入路の先端部に閉止弁を設けたものは、比較的ＯＮ・ＯＦＦに近いように開閉が切り替わるようにして確実にカテーテル本体内の残留物が腸内に流出しないようにできる。
排泄路の先端部に抵抗体を設けたものはカテーテル本体内に回収した排泄物が腸内に戻らないようにして処置される人の負担を軽減できる。
排泄路の先端部に逆止弁を設けたものは、腸内から排泄路に向かう方向にのみ排泄物を通す逆止弁によって確実にカテーテル本体内に回収した排泄物が腸内に戻らないようにして処置される人の負担を軽減する。
【図面の簡単な説明】
【図１】実施例１の直腸カテーテルのカテーテル本体の先端部分を示す説明図である。
【図２】実施例１の直腸カテーテルの説明図である。
【図３】実施例１の直腸カテーテルの抵抗体の動きを示す説明図である。
【図４】実施例１の直腸カテーテルの抵抗体の説明図である。
【図５】実施例２の直腸カテーテルのカテーテル本体の先端部を示す説明図である。
【図６】実施例２の直腸カテーテルの閉止弁の動きを示す説明図である。
【図７】実施例２の直腸カテーテルのカテーテル本体の先端部分を示す説明図である。
【図８】実施例２の直腸カテーテルの逆止弁の動きを示す説明図である。
【図９】実施例２の直腸カテーテルの逆止弁の説明図である。
【符号の説明】
１直腸カテーテル
２カテーテル本体
３薬剤注入路
３ａ（薬剤注入路の）抵抗体
４排泄路
４ａ（排泄路の）抵抗体
５空気注入路
５ａ（空気注入路の）抵抗体
７カテーテル先端部
７ａカテーテル先端部開口
８薬剤注入路接続部
９排泄路接続部
１０空気注入路接続部
１１バルーン用空気通路接続部
１２薬剤注入チューブ
１３排泄チューブ
１４空気注入チューブ
１５空気チューブ
１６薬剤注入装置
１７排泄物回収装置
１８空気注入装置
１９バルーン制御装置
２０バルーン
２１閉止弁
２１ａ弁体
２１ｂ支持部
２２逆止弁
ｈ人[0001]
BACKGROUND OF THE INVENTION
The present invention is an agent or air is injected into the rectum, large intestine, colon from a human anus for examination and treatment, about rectal catheter used to discharge the injectate and excrement from the intestine.
[0002]
[Prior art]
Conventionally, in order to inject drugs and air from the human anus for examination and treatment, a tube is connected to the connecting part provided at the proximal end of the rectal catheter, the rectal catheter is inserted into the anus, and the other end of the tube is inserted. The drug is pumped from one end and pumped into the anus. In order to discharge the sent medicine together with the excrement, the medicine sucked in from the end of another tube connected to the connection portion is discharged by the pump, and the sent medicine is discharged together with the excrement.
In the state where the pump is stopped, the closing valve that stops the feeding of medicine and air and prevents the backflow or prevents the backflow of the aspirated excrement into the intestine is conventionally connected to the proximal tube of the rectal catheter. Was provided.
In this conventional rectal catheter, barium remaining in the catheter body flows into the rectum and destroys the contrast again, particularly when barium is sent with the rectal catheter and the rectum is contrasted to start imaging. There was a problem.
In recent years, when imaging is performed by contrasting the intestine, the person to be imaged is fixed to the treatment table, and the orientation and position of the treatment table can be freely changed to perform imaging at an appropriate position. Since the head is facing upward or the head is facing downward, the barium remaining in the catheter body is more likely to flow into the rectum, which has been a greater problem.
[0003]
[Problems to be solved by the invention]
The problem to be solved by the present invention is to solve these conventional problems, to prevent the drug remaining in the catheter body from flowing into the intestine, and to perform radiography well, An object of the present invention is to provide a rectal catheter that can be smoothly performed and can reduce the burden on the person being treated.
[0004]
[Means for Solving the Problems]
The configuration of the present invention that solves this problem is as follows.
1) Provided with a drug injection path for sending a drug into the intestine and an excretion path for discharging excrement from the intestine in the catheter body to be inserted into the intestine. a pressure below provided a resistor which does not expel medicament in drug infusion path to the distal end of the drug infusion path, yet the resistor is a structure in which a linear cut in a shape that closes the distal end of the drug infusion path, 2. Rectal catheter characterized in that the drug remaining in the drug injection path during use is suppressed from flowing into the intestine 2) Drug injection path and intestine for sending the drug into the intestine in the catheter body inserted into the intestine An excretion passage for discharging excrement from the inside , providing a closing valve in the distal end portion of the drug injection passage that opens when a pressure of a predetermined level or more is applied to the distal end portion of the drug injection passage, During use, the drug remaining in the drug injection channel flows out into the intestines And excretory passage for discharging the excrement an agent rectal catheter 3) catheter body, characterized in that inhibited from the drug infusion path and intestine to send to the intestine is provided, deformation at a predetermined pressure differential acting on the front and rear 1) or 2), in which a resistor that allows excretion to pass through is provided at the distal end of the excretory passage , and the resistor is configured to have a linear cut in a shape that closes the distal end of the excretory passage. check that the drug rectal catheter 4) catheter body according provided and excretory passage for discharging excrement from the drug infusion path and intestine to send to the intestine, passes only excrement in a direction from the intestine to the excretory passage wherein providing the valve tip of the excretory passage 1) or 2) in rectal catheters <br/> according.
[0005]
[Action]
In the present invention, the drug is pumped through the drug injection path provided in the catheter body inserted into the intestine from the anus. The injection pressure of the medicine into the intestine deforms the resistor provided at the tip of the medicine injection path, opens so that the medicine can pass, and the medicine is discharged into the intestine. When the injection of the drug into the intestine is completed, the drug remains in the drug injection path, but the pressure is low so that the resistor cannot be opened and does not flow out into the intestine.
In the case where a stop valve is provided at the tip of the drug injection path, the injection pressure into the intestine of the drug flowing in the drug injection path opens the stop valve provided at the tip of the drug injection path, and from the tip of the drug injection path Exhale into the intestines. When the injection of the drug into the intestine is completed, the drug remains in the drug injection path, but the pressure is low and does not exceed a predetermined pressure. Therefore, the closing valve is closed and the remaining drug does not flow into the intestine.
In the case where a resistor is provided at the distal end of the excretory passage, the pressure behind the resistor is lowered by sucking from the back of the excretory passage of the catheter body inserted into the intestine from the anus, and the pressure difference between the front and rear of the resistor is reduced. The resistor is deformed and opened so that excrement can pass through, and the excrement is discharged from the intestine through the excretion passage of the catheter body. Since the excrement remaining in the excretory passage after the discharge by suction does not become higher in the intestine, the resistor is deformed and does not flow back into the intestine.
In the case where the check valve is provided at the tip of the excretory passage, the excrement passes through only in the direction from the intestine to the excretory passage, so the excreted matter in the excreted passage does not flow back into the intestine .
When the on-off valve that is operated externally is provided in each of the tip of the drug injection path and the excretion path, the on-off valve is opened by an external operation at the time of drug injection or excretion discharge. Injects or discharges excretion from the outlet of each channel, and when not in use, closes each on-off valve by external operation to prevent the drug remaining in the drug injection channel from flowing out into the intestine and excretion channel Prevent excretion taken into the intestines from flowing back into the intestines.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
In the present invention, in the state in which the drug, air or excrement remaining in the catheter body is not leaked or prevented from flowing back by the resistor, the check valve or the shut-off valve, there is no problem in imaging by contrast. Such a small amount of barium leakage and a small amount of excretory back flow that the person being treated does not feel uncomfortable may occur.
Some open / close valves that are operated externally can be opened and closed by injecting or extracting air or water, and those that do not affect the human body even if they leak into the intestines are preferable.
In the present invention, the resistor and the stop valve may have a function as a check valve.
What provides a resistor and an on-off valve between a common path and its discharge port shall include that provided in the discharge port or the catheter front-end | tip part used as the discharge port.
[0007]
【Example】
Embodiments of the present invention will be specifically described with reference to the drawings.
Example 1 (see FIGS. 1 to 4)
Examples 1 to 4 shown in FIGS. 1 to 4 are examples of a rectal catheter in which a drug injection path and an excretion path are provided in a catheter body, and a resistor is provided at each distal end portion.
FIG. 1 is an explanatory view showing the distal end portion of the catheter body of the rectal catheter of Example 1. FIG. FIG. 2 is an explanatory diagram of the rectal catheter according to the first embodiment. FIG. 3 is an explanatory view showing the movement of the resistor of the rectal catheter according to the first embodiment. FIG. 4 is an explanatory diagram of a resistor of the rectal catheter according to the first embodiment.
In the figure, 1 is a rectal catheter, 2 is a catheter body, 3 is a drug injection path, 3a is a resistor provided at the tip of the drug injection path, 4 is an excretion path, and 4a is a resistor provided at the tip of the excretion path 5 is an air injection path, 5a is a resistor provided at the tip of the air injection path, 7 is a catheter tip, 7a is a catheter tip opening, 8 is a drug injection path connection, 9 is an excretion path connection, 10 Is an air injection path connection portion, 11 is an air passage connection portion for a balloon, 12 is a drug injection tube, 13 is an excretion tube, 14 is an air injection tube, 15 is an air tube, 16 is a drug injection device, and 17 is an excrement collection device. , 18 is an air injection device, 19 is a balloon control device, and 20 is a balloon.
[0008]
The rectal catheter 1 according to the first embodiment has a long and moderately soft material rod-like catheter body 2 that can be inserted into the intestine from a human anus along the longitudinal direction of the catheter body 2 as shown in FIGS. The drug injection path 3, the excretion path 4, and the air injection path 5 are provided so as to be separated from each other so as to penetrate the catheter body 2. Further, balloon air passages (not shown) are provided at two locations so as to extend from a predetermined position near the distal end of the catheter body 2 to the rear end along the longitudinal direction of the catheter body 2.
[0009]
Next, as shown in FIG. 2, resistors 3a, 4a and 5a are provided at the tip portions of the drug injection path 3, the excretion path 4 and the air injection path 5. The resistors 3a, 4a, and 5a are formed by closing the drug injection path 3, the excretion path 4, and the air injection path 5 with the distal ends, and providing a linear cut. The resistors 3a, 4a, and 5a are deformed by the received force to open the cut portion. This opening is made larger corresponding to the deformation of the resistors 3a, 4a, 5a.
[0010]
Next, the catheter tip 7 is provided at the tip of the catheter body 2. The distal end portion 7 of the catheter has a shape that decreases in diameter toward the distal end so as to be easily inserted into the anus. The catheter tip 7 is provided with a plurality of catheter tip openings 7a so that the tip of the catheter body 2, that is, the front of each resistor 3a, 4a, 5a communicates with the outside.
[0011]
Next, at the rear end of the drug injection path 3, a drug injection path connection part 8 for connecting to the tube is provided, and at the rear end of the excretion path 4, an excretion path connection part 9 for connecting to the tube is provided, The rear end of the air injection path 5 is provided with an air injection path connection portion 10 for connection to the tube, and the rear end of the balloon air passage is provided with a balloon air passage connection portion 11 for connection to the tube. .
Next, one end of the drug injection tube 12 is connected to the drug injection path connection portion 8, and the other end of the drug injection tube 12 is connected to the drug injection device 16. Next, one end of the excretion tube 13 is connected to the excretion passage connection portion 9, and the other end of the excretion tube 13 is connected to the excrement collection device 17. Next, one end of the air injection tube 14 is connected to the air injection path connecting portion 10, and the other end of the air injection tube 14 is connected to the air injection device 18. Next, one end of the air tube 15 is connected to the balloon air passage connection portion 11, and the other end of the air tube 15 is connected to the balloon control device 19.
Next, balloons 20 that are inflated and inflated by injecting and extracting air into the interior are provided at two points apart from the distal end of the catheter body 2 at predetermined intervals, and the balloons 20 are respectively connected to the balloon air passages.
[0012]
In the rectal catheter 1 of the first embodiment, the catheter body 2 is inserted into the intestine from the anus, and air is sent to the balloon 20 by the balloon control device 19 to inflate the balloon 20 in and out of the anus. Secure to.
Next, the drug injection device 16 and the air injection device 18 inject air and barium, which is a contrast agent, into the intestine as a drug.
When barium is injected, pressure is applied to the barium as shown in FIGS. 3 and 4, so that when barium reaches the tip of the catheter body 2, the barium applies pressure to the resistor 3a of the drug injection path 3. It will be over. The resistor 3a that has received the pressure opens so as to be deformed by the received pressure and open a cut, and barium flows into the intestines through the opening. (FIG. 3 (b), (c), FIG. 4 (b)) Even when air is sent into the intestine as needed, the pressure-fed air applies pressure to the resistor 5a of the air injection path 5, and the resistor. 5a is deformed and the cut portion is opened so that air flows into the intestine.
When the supply of barium to the intestine is stopped, barium remains in the drug injection path 3 of the catheter body. However, since the residual pressure is low, the resistor 3a is not deformed and therefore hardly flows into the intestine.
Similarly, when air is stopped from being sent into the intestine, the air remains in the air injection path 5 of the catheter body 2, but the residual pressure is low so that the resistor 5a is not deformed, so that it hardly flows into the intestine. Absent.
Therefore, by providing the resistor 3a at the distal end of the drug injection path 3 in this manner, barium does not flow out from the catheter body into the intestine after the barium is sent into the intestine. You can shoot reliably and reliably. In addition, stable imaging enables smooth treatment / inspection, reduces the burden on the person being treated by suppressing the increase in treatment / inspection time / inspection due to the difficulty of redoing. Can do.
[0013]
When the intestine imaging contrasted with barium is completed in this way, the excrement collection device 17 is activated and aspirated. By being sucked, negative pressure is applied to the suction side of the resistor 4a at the tip of the excretory passage 4, and barium and excrement pressure in the intestine is applied to the tip of the resistor 4a. The pressure of the barium and excrement in the intestine alone does not deform the resistor 4a so that the cut portion of the resistor 4a opens, but the resistance 4a is deformed because a negative pressure is applied to the opposite side to increase the differential pressure. The cut portion opens, and barium and excrement are discharged through the opening. Therefore, in a state where the excrement collection device 17 is not operated, barium and excrement in the intestine flow into the excretion passage 4, or once the barium and excretion taken into the excretion passage 4 return to the intestine. The discomfort given to the person being treated can be suppressed.
[0014]
Example 2 (see FIGS. 5 to 9)
5 to 9 show an example of a rectal catheter in which a closing valve is provided at the distal end portion of the drug injection path and a check valve is provided at the distal end portion of the excretory path.
FIG. 5 is an explanatory view showing the distal end portion of the catheter body of the rectal catheter according to the second embodiment. FIG. 6 is an explanatory view showing the movement of the closing valve of the rectal catheter according to the second embodiment. FIG. 7 is an explanatory view showing the distal end portion of the catheter body of the rectal catheter according to the second embodiment. FIG. 8 is an explanatory view showing the movement of the check valve of the rectal catheter according to the second embodiment. FIG. 9 is an explanatory view of a check valve of the rectal catheter according to the second embodiment.
In the figure, 21 is a closing valve, 21a is a valve body, 21b is a support part, and 22 is a check valve.
In Example 2, as shown in FIG. 5, a closing valve 21 is provided at the distal end portion of the drug injection path 3, and a check valve 22 is provided at the distal end portion of the excretory path 4.
As shown in FIGS. 5 to 7, the shut-off valve 21 is provided such that a valve body 21 a that can be closed so as to cover the opening at the tip of the drug injection path 3 is pressed against the tip opening of the drug injection path 3 by the support portion 21 b. . Further, an insertion portion is provided on the side of the drug injection path of the valve body 21a, which can be inserted into the tip opening portion of the drug injection path and cannot be held inserted into the tip opening of the drug injection path when a predetermined force or more is applied.
As shown in FIGS. 5, 8, and 9, the check valve 22 gradually narrows the inner passage gradually toward the proximal end of the catheter body 2 in the excretory passage 4, and the inner passage is cut at the rear end. The cut and the internal passage can be opened so as to be expanded when an object passes through.
[0015]
In the second embodiment, when the medicine is pumped into the medicine injection path 3, the pressure of the medicine is applied so as to push the insertion portion of the valve body 21a of the stop valve 21 attached to the tip of the medicine injection path 3, and FIG. ), The valve body 21a moves above the distal end opening of the drug injection path 3. As a result, the tip opening opens relatively rapidly and the medicine is discharged.
During the pumping of the medicine, a force is always applied in the direction of opening the valve body 21a so that the valve body 21a maintains the state where the distal end opening of the medicine injection path 3 is opened. When the pumping of the medicine is finished, the force due to the discharge of the medicine is not applied to the valve body 21a, so that the valve body 21a is pressed against the tip opening of the medicine injection path 3 by the support portion 21b. close up. The valve body 21a does not open unless the drug is pumped and receives a predetermined force, so that the drug in the drug injection path 3 does not further flow out into the intestine during use with the catheter body inserted into the anus. .
Further, when imaging by contrast is completed and the medicine and excrement injected into the intestine are forcibly discharged, as shown in FIGS. 8B and 9B, the check valve 22 is placed behind the check valve 22. As a result of the suction, the pressure difference across the check valve 22 increases, and the intestinal medicine and excrement are sucked through the check valve 22 so as to push the inside of the check valve 22 wide. . After the medicine and excrement are sucked in this way and the excrement collection device 17 is stopped, the reverse pressure is reversed even if the medicine and excrement collected in the excretion channel 4 remain to flow backward. Since force is applied to make the flat shape of the stop valve 22 flatter, the check valve 22 cannot be opened. Therefore, the medicine and excrement collected by backflow do not return to the intestine, and it is possible to prevent the treated person from feeling uncomfortable.
Other symbols, configurations, operations, and usage are the same as those in the first embodiment .
[00 16 ]
【The invention's effect】
According to the present invention, the residue of the catheter body can be prevented from flowing out into the intestine, imaging by contrast can be performed well, the treatment can be performed smoothly, and the burden on the person to be treated can be reduced. Can be a rectal catheter.
In the case where a closing valve is provided at the distal end of the drug injection path, the residue in the catheter body can be surely prevented from flowing out into the intestine by switching between opening and closing so as to be relatively ON / OFF.
A device provided with a resistor at the distal end of the excretory passage can reduce the burden on a person who is treated so that excrement collected in the catheter body does not return to the intestine.
If a check valve is provided at the end of the excretory passage, the excrement collected in the catheter body will not return to the intestine by using a check valve that allows excretion to pass only in the direction from the intestine to the excretory passage. To reduce the burden on the person being treated .
[Brief description of the drawings]
1 is an explanatory view showing a distal end portion of a catheter body of a rectal catheter of Example 1. FIG.
2 is an explanatory diagram of a rectal catheter of Example 1. FIG.
FIG. 3 is an explanatory view showing the movement of the resistor of the rectal catheter according to the first embodiment.
4 is an explanatory diagram of a rectal catheter resistor of Example 1. FIG.
5 is an explanatory view showing a distal end portion of a catheter main body of a rectal catheter of Example 2. FIG.
6 is an explanatory view showing the movement of the closing valve of the rectal catheter of Example 2. FIG.
7 is an explanatory view showing a distal end portion of a catheter main body of a rectal catheter of Example 2. FIG.
8 is an explanatory view showing the movement of a check valve of the rectal catheter of Example 2. FIG.
9 is an explanatory view of a check valve of the rectal catheter of Example 2. FIG .
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Rectal catheter 2 Catheter main body 3 Drug injection path 3a Resistor of drug injection path 4 Excretion path 4a Resistor of excretion path 5 Air injection path 5a Resistor of air injection path 7 Catheter tip 7a Catheter tip Port opening 8 Drug injection path connection section 9 Excretion path connection section 10 Air injection path connection section 11 Balloon air path connection section 12 Drug injection tube 13 Excretion tube 14 Air injection tube 15 Air tube 16 Drug injection apparatus 17 Excrement collection apparatus 18 air injection device 19 balloon control device 20 the balloon 21 closes valve 21a valve 21b support portion 22 a check valve h people

Claims

Provided with a drug injection path for sending the drug into the intestine and an excretion path for discharging excrement from the intestine inside the catheter body to be inserted into the intestine. Then, a resistor that does not discharge the drug in the drug injection path is provided at the tip of the drug injection path, and the resistor has a shape that closes the tip of the drug injection path with a linear cut, and is in use A rectal catheter characterized in that the drug remaining in the drug injection path is prevented from flowing into the intestine.

A drug injection path for sending the drug into the intestine and an excretion path for discharging excrement from the intestine are provided in the catheter body inserted into the intestine, and a pressure of a predetermined level or more is applied to the tip of the drug injection path. The rectal catheter is characterized in that a closing valve that opens and passes the drug is provided in the distal end of the drug injection path to prevent the drug remaining in the drug injection path from flowing into the intestine during use.

Drug into the catheter body provided with excretory passage for discharging excrement from the drug infusion path and intestine to send to the intestine, excretion path resistor passing the excrement deformed at a predetermined pressure differential acting on the front and rear rectal catheter of provided on the distal end portion, moreover the resistor which has a structure in which a linear cut in a shape that closes the distal end of the excretory passage, according to claim 1 or 2.

Drug into the catheter body provided with excretory passage for discharging excrement from the drug infusion path and intestine to send to the intestine, the distal end of the excretory passage of the check valve to pass only excrement in a direction from the intestine to the excretory passage The rectal catheter of Claim 1 or 2 provided in the part .