JP2004242762A - Indwelling catheter - Google Patents

Indwelling catheter Download PDF

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Publication number
JP2004242762A
JP2004242762A JP2003033635A JP2003033635A JP2004242762A JP 2004242762 A JP2004242762 A JP 2004242762A JP 2003033635 A JP2003033635 A JP 2003033635A JP 2003033635 A JP2003033635 A JP 2003033635A JP 2004242762 A JP2004242762 A JP 2004242762A
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Prior art keywords
opening
female connector
tapered
indwelling catheter
hemostatic valve
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JP2003033635A
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JP4432326B2 (en
Inventor
Norihiro Hiejima
徳寛 比恵島
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Nipro Corp
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Nipro Corp
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Priority to JP2003033635A priority Critical patent/JP4432326B2/en
Priority to US10/773,409 priority patent/US7347839B2/en
Priority to AT04003051T priority patent/ATE324138T1/en
Priority to DE602004000710T priority patent/DE602004000710T2/en
Priority to EP04003051A priority patent/EP1452201B1/en
Publication of JP2004242762A publication Critical patent/JP2004242762A/en
Priority to US11/905,047 priority patent/US7914494B2/en
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Publication of JP4432326B2 publication Critical patent/JP4432326B2/en
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Abstract

<P>PROBLEM TO BE SOLVED: To provide an indwelling catheter with a hemostatic valve consisting of a single member, without much possibility to be a cause of an infectious disease and without much possibility of losing the function of the hemostatic valve. <P>SOLUTION: The indwelling catheter has a releasing tapered part 10 formed in the middle in the front/rear direction on the inner surface of a female connector 2 to be tapered toward the front, and the elastically deformable hemostatic valve 3 disposed on the inside of the releasing tapered part 10 in the female connector 2 and backward thereof to be slidable in the front/rear directions. In the indwelling catheter, the hemostatic valve 3 has a body 13, which is hollow with the front and rear ends opened to be elastically deformed inward in the radial direction by sliding the releasing tapered part 10 forward and energized backward by the resilience at the time of the elastic deformation, and an open/close part 14 integrally formed in the front end of the body 13, tapered to close the front end opening of the body 13, with the front end to be opened outward in the radial direction by the inward elastic deformation of the body 13 in the radial direction. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

【０００１】
【発明の属する技術分野】
本発明は、動脈、静脈等に留置され、輸液、輸血、人工透析等に用いられる留置用カテーテルのコネクター部分の改良に関し、詳しくは、動脈、静脈等にカテーテルを留置した際において、カテーテルにキャップ又は輸液ラインを接続するまでのカテーテルからの漏血を良好に防止しながら、接続操作性を向上したカテーテルに関する。
【０００２】
【従来の技術】
従来、斯かる留置用カテーテルとしては、動脈、静脈等に留置されるチューブに雌コネクターが接続され、この雌コネクター内に止血弁が備えられ、止血弁が、雌コネクター内に装着され且つスリットを有する本体と、雌コネクター内に摺動可能に備えられ且つ本体のスリットを押し広げるプッシャーを有するものがある（例えば、特許文献１参照。）。
【０００３】
上記のものでは、雌コネクター内に、シリンジ等の雄コネクターを挿入、接続して、プッシャーを押圧することで、プッシャーにより、本体のスリットが押し広げられて、開放され、流路が開放状態となる。
【０００４】
【特許文献１】
特開２００２−２６３１９７号公報
【０００５】
【発明が解決しようとする課題】
しかしながら、上記の留置用カテーテルでは、雌コネクター内において、止血弁の本体とプッシャーとの間にデッドスペースが形成されるため、雌コネクターへの雄コネクターの接続操作時に、上記デッドスペースに輸液等が実質的に出入りする。そのため、接続操作時に、誤って、雑菌が混入した場合、上記デッドスペースが雑菌の温床となり、これが感染症の発生の原因となる惧れがあった。
【０００６】
又、止血弁が、２個の部品から成るため、構造が複雑であると共に、止血弁の本体のスリットをプッシャーにより押し広げるため、止血弁の開閉を繰り返すと、本体のスリットが良好に閉鎖しなくなって、止血弁の機能が損なわれる惧れもあった。
【０００７】
本発明は、止血弁の構造を簡素化して、雌コネクター内のデッドスペースを減少させ、感染症の発生の原因となる惧れを少なくすると共に、接続操作を繰り返しても、止血弁の機能が損なわれる惧れの少ない留置用カテーテルを提供することを目的とする。
【０００８】
【課題を解決するための手段】
上記目的を達成するために、本発明の留置用カテーテルの特徴とするところはＡ．前後方向に配設されたチューブと、Ｂ．前後両端が開口する中空とされて、チューブの後部に連通状に備えられた雌コネクターを有する留置用カテーテルにおいて、雌コネクターの内周面の前後方向中間部に、前方に向かってテーパー状とされた開放用テーパー部が形成され、雌コネクターの開放用テーパー部とその後方にわたる内部に、弾性変形可能とされた止血弁が前後方向に摺動可能に備えられ、止血弁が、α．前後両端が開口する中空状とされ、開放用テーパー部内を前方に摺動することで、径方向内方に弾性変形されると共に、この弾性変形時の弾発力により、後方に付勢される本体と、β．本体の前端部に、前方突出状に一体形成されて、先細状とされ、本体の前端開口を閉鎖すると共に、本体の径方向内方への弾性変形により、前端部が径方向外方に開放する開閉部を有する点にある。
尚、Ａ．前後方向に配設されたチューブと、Ｂ．前後両端が開口する中空とされて、チューブの後部に連通状に備えられ、後部に雄コネクターが分離可能に接続される雌コネクターと、Ｃ．チューブと雌コネクターに挿脱自在に挿通されて、前部がチューブから前方に突出する内針を有する留置用カテーテルにおいて、雌コネクターの内周面の前後方向中間部に、前方に向かってテーパー状とされた開放用テーパー部が形成され、雌コネクターの開放用テーパー部とその後方にわたる内部に、・ 弾性変形可能とされ、雄コネクターにより前方に押圧可能とされた止血弁が前後方向に摺動可能に備えられ、止血弁が、α．前後両端が開口する中空状とされ、雄コネクターによる押圧時に、開放用テーパー部内を前方に摺動して、径方向内方に弾性変形し、この弾性変形時の弾発力により、後方に付勢される本体と、β．本体の前端部に、前方突出状に一体形成されて、先細状とされ、本体の前端開口を閉鎖すると共に、内針による押圧時及び本体の径方向内方への弾性変形時に、前端部が径方向外方に弾性変形して、開放される開閉部を有することもある。
又、雌コネクターの内周面に、開放用テーパー部の後方に連設され且つ雄コネクターが解除可能に接続される接続用テーパー部が形成され、開放用テーパー部のテーパー比が接続用テーパー部のテーパー比よりも大とされることもある。
更に、止血弁がダックビル形状とされることもある。
又、止血弁がゴム弾性材料から成ることもある。
【０００９】
【発明の実施の形態】
以下、本発明を外套針型留置用カテーテルに適用した実施の形態の一例を図面に基づき説明すると、図１はカテーテルを示し、カテーテルは、チューブ（カテーテルチューブ、外套針）１と、雌コネクター（カテーテルコネクター、外套針ハブ）２と、止血弁３と、内針（中空針）４と、内針ハブ５と、フィルターキャップ６と、疎水性フィルター７等を有する。
【００１０】
図２〜図９にも示すように、チューブ１は細長い（半）透明とされて、可撓性を有し、プラスチック（樹脂）材料により一体形成されて、前後方向に配設されている。このプラスチック材料としては、例えば、熱可塑性樹脂が使用される。この熱可塑性樹脂としては、好ましくは、エチレン・テトラフルオロエチレン共重合体（ＥＴＦＥ）、テトラフルオロエチレン・パーフルオロアルキルエーテル共重合体（ＰＦＡ）、ポリプロピレン樹脂、ポリエチレン樹脂、ポリ塩化ビニル樹脂、アクリルニトリル・ブタジエン・スチレン共重合体、ポリカーボネート樹脂、ポリアミド樹脂、ポリオキシメチレン樹脂等が挙げられる。
【００１１】
雌コネクター２は、その後部内に雄コネクターが連通状として、解除可能に接続されるもので、前後両端が開口する中空の筒状とされ、チューブ１の後部に連通状に外嵌されて、接着剤８により固定されている。雌コネクター２内周面には、後部に位置する接続用テーパー部（第１テーパー部）９、前後方向中間部に位置する開放用テーパー部（第２テーパー部）１０、前部に位置する固定部１１が上記の順で前方に向かって連設されている。尚、図２、図５及び図８において、Ｌ１〜Ｌ３は、夫々、各テーパー部９，１０及び固定部１１の長さを示している。両テーパー部９，１０は、前方に向かって、テーパー状とされ、開放用テーパー部１０のテーパー比（テーパー角度）は、接続用テーパー部９のそれよりも大とされている。接続用テーパー部９内には、シリンジ等の雄コネクターが解除可能に接続され、固定部１１にはチューブ１が固定される。雌コネクター２はプラスチック（樹脂）材料により一体形成されており、このプラスチック材料としては、例えば、チューブ１と同様のものが挙げられる。
【００１２】
止血弁３は、雌コネクター２内の接続用テーパー部９と開放用テーパー部１０にわたって、前後方向に摺動可能に備えられると共に、弾性変形可能とされ、内針ハブ５及び雄コネクターにより前方に押圧可能とされている。止血弁３は、先細状とされて、例えば、ダックビル（カモノハシのくちばし）形状、又は、これを取り入れた形状とされて、止血弁３は、本体１３と開閉部１４を一体形成して成る。止血弁３は、シリコーン、合成ポリイソプレンゴム、天然ゴム、ブチルゴム、クロロプレンゴム、ウレタンゴム、スチレンーブタジエンゴム、エチレンプロピレンゴム、アクリルゴム、フッ素ゴム、熱可塑性エラストマー等のゴム弾性材により形成されている。尚、樹脂材料内に配置したバネ鋼、形状記憶合金等の金属材料、ゴム弾性材料と金属材料を組み合わせたもの等により、止血弁３に弾性を付与してもよい。
【００１３】
本体１３は、前後両端が開口する中空状とされると共に、その前部及び後部が、開放用テーパー部１０の後端の内径以上の外径を有する大形部１６とされており、本体１３は、接続用テーパー部９内に位置して、その内面に当接している。本体１３は、内針ハブ５及び雄コネクターによる押圧時に、開放用テーパー部１０内を前方に摺動すると共に、径方向内方に弾性変形して、この弾性変形時の弾発力により、後方に付勢される。尚、本発明では、開放用テーパー部１０とは、後端の内径が本体１３の外径よりも小であるテーパー部をいうものとする。
【００１４】
開閉部１４は、本体１３の前端部に、前方突出状に、一体形成されて、先細状とされるもので、本例では、ダックビル形状とされて、下記のようにして、本体１３の前端開口を開閉可能に閉鎖している。即ち、開閉部１４の正面視において、開閉部１４の前端の長手方向（径方向）全長にわたり且つ開閉部１４の前端の幅方向中央部に位置するスリット１８が、開閉部１４の前端部に前後方向に貫通形成されて、開閉部１４の前端部が開閉可能とされている。開閉部１４の前端部は、内針４による押圧時及び本体１３の径方向内方への弾性変形時に、径方向外方に弾性変形して、開放される。
【００１５】
内針４は、チューブ１及び雌コネクター２に挿脱自在に挿通されて、前部がチューブ１から前方に突出するもので、細長いチューブ１（管）状とされて、可撓性を有し、前端が先鋭状とされている。内針４は、例えば、ステンレス（ＳＵＳ３０４が好ましい。）により一体形成されている。
【００１６】
内針ハブ５は、前後両端が開口する中空の筒状とされ、その前部が内針４の後部に連通状に、外嵌されて、接着剤１９により固定されると共に、雌コネクター２の後部に挿脱自在に挿入される。内針ハブ５はプラスチック（樹脂）材料により一体形成されており、このプラスチック材料としては、例えば、チューブ１と同様のものが挙げられる。
【００１７】
フィルターキャップ６は、内針４への血液や体液のフラッシュバックを確認して、血液等の外部への漏れを防止するもので、前後両端が開口する中空の筒状とされて、その前部が内針ハブ５の後部に挿脱自在に挿入される。キャップ６は（半）透明なプラスチック（樹脂）材料により一体形成されており、このプラスチック材料としては、例えば、チューブ１と同様のものが挙げられる。
【００１８】
フィルター７は、フィルターキャップ６の後端部内に装着されている。
【００１９】
上記構成例によれば、患者の手の甲の末梢静脈等の血管や皮下等からの輸液や採血等を行なう際には、まず、カテーテルにおいて、図１〜図３に示すように、内針４及び内針ハブ５を、雌コネクター２内に後方から挿入して、内針４により、止血弁３の開閉部１４を押し開きながら、チューブ１に挿通すると共に、内針ハブ５により、止血弁３を前方に押圧して、止血弁３の本体１３を開放用テーパー部１０内に摺動させ、本体１３を径方向内方に弾性変形させる。尚、この状態では、本体１３は、その弾発力により、後方に付勢されている。
【００２０】
次に、内針４及びチューブ１を、患者の血管等に穿刺するのであるが、この際、患者の血管内の血液や体液がフラッシュバックして、内針４から内針ハブ５内に流出する。この流出を、内針ハブ５を介して、視認できるので、上記穿刺が良好に行なわれたか、否かを容易に確認できる。
【００２１】
又、この穿刺時には、内針ハブ５の後端開口は、フィルターキャップ６及びフィルター７により閉鎖状態にあるので、内針ハブ５の後端開口から雑菌等が侵入する惧れはない。
【００２２】
上記のようにして、内針４及びチューブ１を患者の血管等に穿刺した後、雌コネクター２等を患者の手の甲にテープ等で固定する。
【００２３】
次に、内針４及び内針ハブ５をチューブ１及び雌コネクター２等から抜去するのであるが、この抜去により、内針ハブ５による止血弁３の押圧が解除されるので、止血弁３の本体１３が、その弾発力により、後方に摺動して、接続用テーパー部９内に復帰すると共に、径方向外方に変形して、元の大きさに戻り、これにより、止血弁３の開閉部１４が閉鎖される。これによって、内針４の上記抜去時に、血液漏れ等を防止できる。
【００２４】
その後、輸液や採血等を開始する際には、図７〜図９に示すように、雌コネクター２内に、例えば、雄コネクターとして例示されるシリンジ２０のチップ２１を挿入し、チップ２１を雌コネクター２の接続用テーパー部９に解除可能にテーパー結合して、接続すると共に、止血弁３を前方に押圧する。これにより、上記同様に、止血弁３の本体１３が開放用テーパー部１０内に摺動して、本体１３が径方向内方に弾性変形し、止血弁３の開閉部１４が開放される。そして、シリンジ２０により、輸液や採血等を開始する。
【００２５】
輸液や採血等が終了すれば、シリンジ２０を雌コネクター２から抜去するのであるが、この抜去により、シリンジ２０による止血弁３の押圧が解除されるので、上記同様に、止血弁３の本体１３が、その弾発力により、後方に摺動して、接続用テーパー部９内に復帰すると共に、径方向外方に変形して、元の大きさに戻り、これにより、止血弁３の開閉部１４が閉鎖される。これによって、シリンジの抜去時に、血液漏れ等を防止できる。
【００２６】
上記構成例では、止血弁３を単一の部材により構成したので、雌コネクター２と止血弁３間に形成されるデッドスペースを小さくできる。このように、雑菌の温床となる上記デッドスペースを小さくできるので、感染症の発生の原因となる惧れを少なくできる。
【００２７】
又、止血弁３を単一の部材により構成したので、構造が簡易であると共に、雌コネクター２と雄コネクターの接続時に、止血弁３の開閉部１４を雄コネクター等により押し広げて、開放するのではなく、止血弁３を雄コネクターにより摺動させることで、開閉部１４を開放するので、雌コネクター２と雄コネクターの接続を繰り返しても、開閉部１４の機能、即ち、止血弁３の機能が損なわる惧れが少ない。
【００２８】
尚、上記実施の形態では、接続用テーパー部と開放用テーパー部のテーパー比を異なるものとしたが、同一としてもよい。
【００２９】
【発明の効果】
以上詳述したように、本発明によれば、止血弁を単一の部材により構成したので、雌コネクターと止血弁間に形成されるデッドスペースを小さくできる。このように、雑菌の温床となる上記デッドスペースを小さくできるので、感染症の発生の原因となる惧れを少なくできる。
又、止血弁を単一の部材により構成したので、構造が簡易であると共に、雌コネクターと雄コネクターの接続時に、止血弁の開閉部を雄コネクター等により押し広げて、開放するのではなく、止血弁を雄コネクターにより摺動させることで、開閉部を開放するので、雌コネクターと雄コネクターの接続を繰り返しても、開閉部の機能、即ち、止血弁の機能が損なわる惧れが少ない。
【図面の簡単な説明】
【図１】本発明の実施の形態の一例を示す断面図である。
【図２】図１の要部拡大図である。
【図３】図１のＡ−Ａ線矢視断面図である。
【図４】図１の分解斜視図である。
【図５】図４の要部拡大図である。
【図６】図４のＢ−Ｂ線矢視断面図である。
【図７】図１の内針等をシリンジに代えた状態を示す断面図である。
【図８】図７の要部拡大図である。
【図９】図７のＣ−Ｃ線矢視断面図である。
【符号の説明】
１ チューブ
２ 雌コネクター
３ 止血弁
４ 内針
５ 内針ハブ
９ 接続用テーパー部
１０ 開放用テーパー部
１３ 本体
１４ 開閉部
２０ シリンジ（雄コネクター）[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an improvement in a connector portion of an indwelling catheter used for infusion, blood transfusion, artificial dialysis, and the like, which is indwelled in arteries, veins, and the like. Also, the present invention relates to a catheter having improved connection operability while favorably preventing blood leakage from the catheter until connecting an infusion line.
[0002]
[Prior art]
Conventionally, as such an indwelling catheter, a female connector is connected to a tube to be indwelled in an artery, a vein, or the like, a hemostatic valve is provided in the female connector, the hemostatic valve is mounted in the female connector, and a slit is formed. And a pusher that is slidably provided in the female connector and pushes out a slit of the main body (for example, see Patent Document 1).
[0003]
In the above, by inserting and connecting a male connector such as a syringe into the female connector and pressing the pusher, the pusher pushes the slit of the main body to be opened, and the flow path is opened. Become.
[0004]
[Patent Document 1]
JP-A-2002-263197 [0005]
[Problems to be solved by the invention]
However, in the above-mentioned indwelling catheter, since a dead space is formed between the main body of the hemostatic valve and the pusher in the female connector, when a male connector is connected to the female connector, an infusion or the like is injected into the dead space. Substantially come and go. For this reason, if germs are mixed by mistake during the connection operation, the dead space serves as a hotbed of germs, which may cause an infection.
[0006]
In addition, since the hemostatic valve is composed of two parts, the structure is complicated, and the slit of the main body of the hemostatic valve is repeatedly opened and closed by pushing and opening the slit of the main body of the hemostatic valve with a pusher, so that the slit of the main body closes well. There was a fear that the function of the hemostasis valve would be impaired.
[0007]
The present invention simplifies the structure of the hemostasis valve, reduces dead space in the female connector, reduces the risk of causing infection, and maintains the function of the hemostasis valve even after repeated connection operations. An object of the present invention is to provide an indwelling catheter that is less likely to be damaged.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, the feature of the indwelling catheter of the present invention is as follows. B. tubes arranged in the front-back direction; The indwelling catheter having a female connector provided in communication with the rear part of the tube, which is hollow at both front and rear ends, wherein the female connector is tapered forward at an intermediate portion in the front-rear direction of the inner peripheral surface of the female connector. An open taper portion is formed, and an elastically deformable hemostatic valve is provided slidably in the front-rear direction inside the opening taper portion of the female connector and the interior behind the female taper portion. It has a hollow shape with both front and rear ends open, and is slid forward in the opening taper portion to be elastically deformed radially inward and urged rearward by the elastic force at the time of this elastic deformation. Body and β. At the front end of the main body, it is integrally formed in a forward protruding shape and is tapered, closing the front end opening of the main body and opening the front end radially outward by elastic deformation of the main body radially inward. In that it has an opening / closing part that does.
A. B. tubes arranged in the front-back direction; B. a female connector which is hollow at both front and rear ends and is provided in communication with the rear of the tube, and to which a male connector is separably connected at the rear; In an indwelling catheter having an inner needle that is inserted through a tube and a female connector so that it can be inserted and removed, and whose front part projects forward from the tube, a tapered forward part is formed in the middle part in the front-rear direction of the inner peripheral surface of the female connector. The opening of the female connector is formed, and the hemostatic valve, which is elastically deformable and can be pushed forward by the male connector, slides in the front-rear direction inside the opening taper of the female connector and the interior behind it. The hemostatic valve is provided as possible. It has a hollow shape with both front and rear ends open.When pressed by a male connector, it slides forward in the opening taper part and elastically deforms radially inward. The main body being driven, β. At the front end of the main body, it is integrally formed in a forward protruding shape, is tapered, closes the front end opening of the main body, and when pressed by the inner needle and elastically deforms radially inward of the main body, the front end is It may have an opening / closing part which is elastically deformed radially outward and opened.
In addition, a connection taper portion is formed on the inner peripheral surface of the female connector, the connection taper portion being connected to the rear of the opening taper portion and releasably connected to the male connector, and the taper ratio of the opening taper portion is set to the connection taper portion. May be larger than the taper ratio.
Further, the hemostatic valve may be duckbill shaped.
Also, the hemostasis valve may be made of a rubber elastic material.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an example of an embodiment in which the present invention is applied to a trocar-type indwelling catheter will be described with reference to the drawings. FIG. 1 shows a catheter, and the catheter includes a tube (catheter tube, trocar) 1 and a female connector ( It has a catheter connector, an outer trocar hub 2, a hemostasis valve 3, an inner needle (hollow needle) 4, an inner needle hub 5, a filter cap 6, a hydrophobic filter 7, and the like.
[0010]
As shown in FIGS. 2 to 9, the tube 1 is elongated (semi-) transparent, has flexibility, is integrally formed of a plastic (resin) material, and is disposed in the front-rear direction. As the plastic material, for example, a thermoplastic resin is used. As the thermoplastic resin, preferably, ethylene / tetrafluoroethylene copolymer (ETFE), tetrafluoroethylene / perfluoroalkyl ether copolymer (PFA), polypropylene resin, polyethylene resin, polyvinyl chloride resin, acrylonitrile -Butadiene / styrene copolymer, polycarbonate resin, polyamide resin, polyoxymethylene resin and the like.
[0011]
The female connector 2 is configured such that a male connector is connected in the rear portion thereof so as to be releasable and connected in a releasable manner. The female connector 2 has a hollow cylindrical shape with open front and rear ends, and is fitted to the rear portion of the tube 1 in a communication shape and adhered. It is fixed by the agent 8. On the inner peripheral surface of the female connector 2, a connection taper portion (first taper portion) 9 located at a rear portion, an opening taper portion (second taper portion) 10 located at an intermediate portion in the front-rear direction, and a fixing portion located at a front portion The parts 11 are provided continuously in the above order toward the front. In FIGS. 2, 5, and 8, L1 to L3 indicate the lengths of the tapered portions 9, 10 and the fixed portion 11, respectively. The tapered portions 9 and 10 are tapered forward, and the taper ratio (taper angle) of the opening taper portion 10 is larger than that of the connection taper portion 9. A male connector such as a syringe is releasably connected in the connection taper portion 9, and the tube 1 is fixed to the fixing portion 11. The female connector 2 is integrally formed of a plastic (resin) material. As the plastic material, for example, the same as the tube 1 can be used.
[0012]
The hemostatic valve 3 is provided so as to be slidable in the front-rear direction over the connecting taper portion 9 and the opening taper portion 10 in the female connector 2 and is also elastically deformable, and is forwardly moved by the inner needle hub 5 and the male connector. Pressing is possible. The hemostatic valve 3 is tapered, for example, has a duck bill (platy beak) shape or a shape incorporating the same, and the hemostatic valve 3 is formed by integrally forming a main body 13 and an opening / closing portion 14. The hemostatic valve 3 is formed of a rubber elastic material such as silicone, synthetic polyisoprene rubber, natural rubber, butyl rubber, chloroprene rubber, urethane rubber, styrene butadiene rubber, ethylene propylene rubber, acrylic rubber, fluorine rubber, and thermoplastic elastomer. I have. The elasticity of the hemostatic valve 3 may be provided by a metal material such as spring steel or a shape memory alloy disposed in a resin material, or a combination of a rubber elastic material and a metal material.
[0013]
The main body 13 has a hollow shape whose front and rear ends are open, and has a front portion and a rear portion formed as a large portion 16 having an outer diameter equal to or larger than the inner diameter of the rear end of the opening tapered portion 10. Are located in the connection taper portion 9 and are in contact with the inner surface thereof. When pressed by the inner needle hub 5 and the male connector, the main body 13 slides forward in the opening tapered portion 10 and elastically deforms radially inward, and is elastically deformed rearward by the elastic force at the time of the elastic deformation. It is urged to. In the present invention, the opening tapered portion 10 refers to a tapered portion whose rear end has an inner diameter smaller than the outer diameter of the main body 13.
[0014]
The opening / closing part 14 is formed integrally with the front end of the main body 13 so as to protrude forward and is tapered. In this example, the opening / closing part 14 is formed in a duck bill shape, and as described below, the front end of the main body 13 is formed. The opening is closed so that it can be opened and closed. That is, in the front view of the opening / closing section 14, the slit 18 located in the width direction central portion of the front end of the opening / closing section 14 over the entire length (radial direction) of the front end of the opening / closing section 14 is located at the front end of the opening / closing section 14. The front end of the opening / closing section 14 can be opened and closed. The front end of the opening / closing portion 14 is elastically deformed radially outward when the inner needle 4 is pressed and the body 13 is elastically deformed radially inward, and is opened.
[0015]
The inner needle 4 is inserted through the tube 1 and the female connector 2 so as to be able to be inserted and removed, and has a front portion protruding forward from the tube 1. The inner needle 4 has an elongated tube 1 (tube) shape and has flexibility. The front end is sharpened. The inner needle 4 is integrally formed of, for example, stainless steel (SUS304 is preferable).
[0016]
The inner needle hub 5 has a hollow cylindrical shape with open front and rear ends, and a front portion thereof is fitted to the rear portion of the inner needle 4 so as to be communicated with the rear portion thereof, is fixed by an adhesive 19, and is fixed to the female connector 2. It is removably inserted into the rear part. The inner needle hub 5 is integrally formed of a plastic (resin) material. As the plastic material, for example, the same material as the tube 1 can be used.
[0017]
The filter cap 6 is for checking the flashback of blood or body fluid to the inner needle 4 to prevent blood or the like from leaking to the outside. The filter cap 6 has a hollow cylindrical shape with open front and rear ends. Is removably inserted into the rear portion of the inner needle hub 5. The cap 6 is integrally formed of a (semi-) transparent plastic (resin) material. As the plastic material, for example, the same material as the tube 1 can be used.
[0018]
The filter 7 is mounted in the rear end of the filter cap 6.
[0019]
According to the above configuration example, when performing infusion or blood collection from a blood vessel such as a peripheral vein of a back of a patient's hand or a subcutaneous blood, first, in a catheter, as shown in FIGS. The inner needle hub 5 is inserted into the female connector 2 from the rear. The inner needle 4 pushes and opens the opening / closing portion 14 of the hemostatic valve 3, and the inner needle hub 5 is inserted into the tube 1. Is pressed forward to slide the main body 13 of the hemostatic valve 3 into the opening tapered portion 10 to elastically deform the main body 13 radially inward. In this state, the main body 13 is urged rearward by its elastic force.
[0020]
Next, the inner needle 4 and the tube 1 are punctured into a blood vessel or the like of the patient. At this time, blood or body fluid in the blood vessel of the patient flashes back and flows out from the inner needle 4 into the inner needle hub 5. I do. This outflow can be visually recognized through the inner needle hub 5, so that it can be easily confirmed whether or not the puncture has been successfully performed.
[0021]
In addition, at the time of puncturing, the rear end opening of the inner needle hub 5 is closed by the filter cap 6 and the filter 7, so that there is no fear that germs or the like enter the rear end opening of the inner needle hub 5.
[0022]
After piercing the inner needle 4 and the tube 1 into a blood vessel or the like of the patient as described above, the female connector 2 or the like is fixed to the back of the patient's hand with tape or the like.
[0023]
Next, the inner needle 4 and the inner needle hub 5 are withdrawn from the tube 1 and the female connector 2 and the like. By this withdrawal, the pressing of the hemostatic valve 3 by the inner needle hub 5 is released. The main body 13 slides rearward due to the resilient force and returns to the inside of the connecting tapered portion 9, and is deformed radially outward to return to the original size. Is closed. Thereby, at the time of the removal of the inner needle 4, blood leakage or the like can be prevented.
[0024]
Thereafter, when infusion or blood collection is started, as shown in FIGS. 7 to 9, for example, the tip 21 of the syringe 20 exemplified as a male connector is inserted into the female connector 2, and the tip 21 is inserted into the female connector. The connector 2 is connected to the connecting tapered portion 9 of the connector 2 so as to be releasably tapered and connected, and presses the hemostatic valve 3 forward. As a result, the main body 13 of the hemostatic valve 3 slides into the opening taper portion 10 as described above, and the main body 13 is elastically deformed radially inward, and the opening / closing portion 14 of the hemostatic valve 3 is opened. Then, infusion and blood collection are started by the syringe 20.
[0025]
When the infusion or blood collection is completed, the syringe 20 is removed from the female connector 2. This removal releases the pressing of the hemostatic valve 3 by the syringe 20. However, due to the resilience, it slides rearward and returns to the inside of the connecting taper portion 9 and deforms radially outward to return to its original size, thereby opening and closing the hemostatic valve 3. The part 14 is closed. This can prevent blood leakage and the like when the syringe is removed.
[0026]
In the above configuration example, since the hemostatic valve 3 is formed of a single member, a dead space formed between the female connector 2 and the hemostatic valve 3 can be reduced. As described above, since the dead space serving as a hotbed of various germs can be reduced, the risk of causing an infectious disease can be reduced.
[0027]
Further, since the hemostatic valve 3 is constituted by a single member, the structure is simple, and when the female connector 2 and the male connector are connected, the opening / closing section 14 of the hemostatic valve 3 is pushed open by a male connector or the like and opened. Instead, the opening / closing section 14 is opened by sliding the hemostatic valve 3 by the male connector. Therefore, even if the connection between the female connector 2 and the male connector is repeated, the function of the opening / closing section 14, that is, the function of the hemostatic valve 3, There is little fear that the function will be impaired.
[0028]
In the above embodiment, the taper ratios of the connection taper portion and the opening taper portion are different, but may be the same.
[0029]
【The invention's effect】
As described above in detail, according to the present invention, since the hemostatic valve is formed of a single member, the dead space formed between the female connector and the hemostatic valve can be reduced. As described above, since the dead space serving as a hotbed of various germs can be reduced, the risk of causing an infectious disease can be reduced.
In addition, since the hemostatic valve is constituted by a single member, the structure is simple, and at the time of connection between the female connector and the male connector, the opening and closing portion of the hemostatic valve is expanded by a male connector or the like, instead of being opened. Since the opening / closing portion is opened by sliding the hemostatic valve by the male connector, even if the connection between the female connector and the male connector is repeated, the function of the opening / closing portion, that is, the function of the hemostatic valve is less likely to be impaired.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view illustrating an example of an embodiment of the present invention.
FIG. 2 is an enlarged view of a main part of FIG.
FIG. 3 is a sectional view taken along line AA of FIG. 1;
FIG. 4 is an exploded perspective view of FIG.
FIG. 5 is an enlarged view of a main part of FIG. 4;
FIG. 6 is a sectional view taken along line BB of FIG. 4;
FIG. 7 is a cross-sectional view showing a state in which the inner needle and the like in FIG. 1 are replaced with a syringe.
FIG. 8 is an enlarged view of a main part of FIG. 7;
FIG. 9 is a sectional view taken along line CC of FIG. 7;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Tube 2 Female connector 3 Hemostasis valve 4 Inner needle 5 Inner needle hub 9 Taper part for connection 10 Taper part for opening 13 Main body 14 Opening / closing part 20 Syringe (male connector)

Claims (5)

Ａ．前後方向に配設されたチューブと、
Ｂ．前後両端が開口する中空とされて、チューブの後部に連通状に備えられた雌コネクター
を有する留置用カテーテルにおいて、
雌コネクターの内周面の前後方向中間部に、前方に向かってテーパー状とされた開放用テーパー部が形成され、
雌コネクターの開放用テーパー部とその後方にわたる内部に、弾性変形可能とされた止血弁が前後方向に摺動可能に備えられ、
止血弁が、
α．前後両端が開口する中空状とされ、開放用テーパー部内を前方に摺動することで、径方向内方に弾性変形されると共に、この弾性変形時の弾発力により、後方に付勢される本体と、
β．本体の前端部に、前方突出状に一体形成されて、先細状とされ、本体の前端開口を閉鎖すると共に、本体の径方向内方への弾性変形により、前端部が径方向外方に開放する開閉部
を有する留置用カテーテル。A. A tube arranged in the front-rear direction,
B. In the indwelling catheter having a female connector provided in communication with a rear portion of the tube, which is hollow at both front and rear ends,
An opening tapered portion tapered forward is formed at a middle portion in the front-rear direction of the inner peripheral surface of the female connector,
An elastically deformable hemostatic valve is provided slidably in the front-rear direction, inside the female taper portion for opening of the female connector and the interior behind it.
Hemostasis valve
α. It has a hollow shape with both front and rear ends open, and is slid forward in the opening taper portion to be elastically deformed radially inward and urged rearward by the elastic force at the time of this elastic deformation. Body and
β. At the front end of the main body, it is integrally formed in a forward protruding shape and is tapered, closing the front end opening of the main body and opening the front end radially outward by elastic deformation of the main body radially inward. An indwelling catheter having an opening / closing section. Ａ．前後方向に配設されたチューブと、
Ｂ．前後両端が開口する中空とされて、チューブの後部に連通状に備えられ、
後部に雄コネクターが分離可能に接続される雌コネクターと、
Ｃ．チューブと雌コネクターに挿脱自在に挿通されて、前部がチューブから前方に突出する内針
を有する留置用カテーテルにおいて、
雌コネクターの内周面の前後方向中間部に、前方に向かってテーパー状とされた開放用テーパー部が形成され、
雌コネクターの開放用テーパー部とその後方にわたる内部に、
・ 弾性変形可能とされ、雄コネクターにより前方に押圧可能とされた止血弁が前後方向に摺動可能に備えられ、
止血弁が、
α．前後両端が開口する中空状とされ、雄コネクターによる押圧時に、開放用テーパー部内を前方に摺動して、径方向内方に弾性変形し、この弾性変形時の弾発力により、後方に付勢される本体と、
β．本体の前端部に、前方突出状に一体形成されて、先細状とされ、本体の前端開口を閉鎖すると共に、内針による押圧時及び本体の径方向内方への弾性変形時に、前端部が径方向外方に弾性変形して、開放される開閉部
を有する留置用カテーテル。A. A tube arranged in the front-rear direction,
B. It is hollow at both front and rear ends and is provided in communication with the rear of the tube,
A female connector to which a male connector is separably connected to the rear,
C. In an indwelling catheter having an inner needle that is inserted through the tube and the female connector so that it can be inserted and removed, and the front part projects forward from the tube,
An opening tapered portion tapered forward is formed at a middle portion in the front-rear direction of the inner peripheral surface of the female connector,
Inside the tapered opening for female connector and behind it,
・ A hemostatic valve, which is elastically deformable and can be pushed forward by a male connector, is provided so as to be slidable in the front-rear direction,
Hemostasis valve
α. It has a hollow shape with both front and rear ends open.When pressed by a male connector, it slides forward in the opening taper part and elastically deforms radially inward. The body being energized,
β. At the front end of the main body, it is integrally formed in a forward protruding shape, is tapered, closes the front end opening of the main body, and when pressed by the inner needle and elastically deforms radially inward of the main body, the front end is An indwelling catheter having an opening / closing portion that is elastically deformed radially outward and is opened. 雌コネクターの内周面に、開放用テーパー部の後方に連設され且つ雄コネクターが解除可能に接続される接続用テーパー部が形成され、
開放用テーパー部のテーパー比が接続用テーパー部のテーパー比よりも大とされた請求項１又は２記載の留置用カテーテル。On the inner peripheral surface of the female connector, a connection taper portion is provided, which is connected to the rear of the opening taper portion and the male connector is releasably connected,
3. The indwelling catheter according to claim 1, wherein a taper ratio of the opening taper portion is larger than a taper ratio of the connection taper portion. 止血弁がダックビル形状とされた請求項１〜３の何れかに記載の留置用カテーテル。The indwelling catheter according to any one of claims 1 to 3, wherein the hemostatic valve has a duckbill shape. 止血弁がゴム弾性材料から成る請求項１〜４の何れかに記載の留置用カテーテル。The indwelling catheter according to any one of claims 1 to 4, wherein the hemostatic valve is made of a rubber elastic material.
JP2003033635A 2003-02-12 2003-02-12 Indwelling catheter Expired - Fee Related JP4432326B2 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
JP2003033635A JP4432326B2 (en) 2003-02-12 2003-02-12 Indwelling catheter
US10/773,409 US7347839B2 (en) 2003-02-12 2004-02-09 Indwelling catheter
AT04003051T ATE324138T1 (en) 2003-02-12 2004-02-11 INDATING CATHETER WITH A HEMOSTATIC VALVE
DE602004000710T DE602004000710T2 (en) 2003-02-12 2004-02-11 Indwelling catheter with a haemostatic valve
EP04003051A EP1452201B1 (en) 2003-02-12 2004-02-11 Indwelling catheter with hemostasis valve
US11/905,047 US7914494B2 (en) 2003-02-12 2007-09-27 Indwelling catheter

Applications Claiming Priority (1)

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JP2011520551A (en) * 2008-05-19 2011-07-21 ベクトン・ディキンソン・アンド・カンパニー Radially compressible blood control valve
WO2012002015A1 (en) * 2010-06-30 2012-01-05 テルモ株式会社 Connection tool and indwelling needle assembly
JP2012531964A (en) * 2009-06-29 2012-12-13 ミラジ メディカル インコーポレイテッド Safety catheter
WO2013146310A1 (en) * 2012-03-28 2013-10-03 テルモ株式会社 Puncture instrument assembly
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JP2014528330A (en) * 2011-10-06 2014-10-27 ベクトン・ディキンソン・アンド・カンパニーＢｅｃｔｏｎ， Ｄｉｃｋｉｎｓｏｎ Ａｎｄ Ｃｏｍｐａｎｙ Intravenous catheter with duckbill valve
WO2013146310A1 (en) * 2012-03-28 2013-10-03 テルモ株式会社 Puncture instrument assembly
JPWO2013146310A1 (en) * 2012-03-28 2015-12-10 テルモ株式会社 Puncture device assembly
WO2020158929A1 (en) * 2019-02-01 2020-08-06 ニプロ株式会社 Puncturing tool for small animals

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