JP2004242763A - Indwelling catheter - Google Patents

Indwelling catheter Download PDF

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Publication number
JP2004242763A
JP2004242763A JP2003033636A JP2003033636A JP2004242763A JP 2004242763 A JP2004242763 A JP 2004242763A JP 2003033636 A JP2003033636 A JP 2003033636A JP 2003033636 A JP2003033636 A JP 2003033636A JP 2004242763 A JP2004242763 A JP 2004242763A
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Japan
Prior art keywords
tube
female connector
rear end
hemostatic valve
inner needle
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JP2003033636A
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Japanese (ja)
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JP4423861B2 (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 JP2003033636A priority Critical patent/JP4423861B2/en
Priority to US10/773,409 priority patent/US7347839B2/en
Priority to AT04003051T priority patent/ATE324138T1/en
Priority to EP04003051A priority patent/EP1452201B1/en
Priority to DE602004000710T priority patent/DE602004000710T2/en
Publication of JP2004242763A publication Critical patent/JP2004242763A/en
Priority to US11/905,047 priority patent/US7914494B2/en
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Publication of JP4423861B2 publication Critical patent/JP4423861B2/en
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  • Infusion, Injection, And Reservoir Apparatuses (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To reduce the possibility of a catheter to be a cause of an infectious disease by constituting a hemostatic valve with a single member. <P>SOLUTION: A tubular connection part 11, "which is disposed in the front/rear directions, communicating with a tube 1 and located inside a female connector 2, with the rear end opened," is integrally formed in the tube 1 or in the female connector 2, and the elastically deformable hemostatic valve 3 is mounted inside the female connector 2. The hemostatic valve 3 has (a) a cylinder part 13 engaged with the outside of the connection part 11 from the rear to be contracted by the forward elastic deformation, and (b) an open/close part 14 integrally formed at the rear end of the cylinder part 13 to close the rear end opening of the connection part 11, having a slit formed in the radial direction, to be elastically deformed outward in the radial direction and opened by the contraction of the cylinder part 13. <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できる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の問題もあった。
【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した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、チューブ、又は、雌コネクターに、・ 前後方向に配設され、チューブと連通して、雌コネクター内に位置すると共に、後端が開口するチューブ状接続部が一体形成され、雌コネクター内に、弾性変形可能とされた止血弁が備えられ、止血弁が、イ．接続部に後方から外嵌され、前方への弾性変形により、縮小可能とされた筒部と、ロ．筒部の後端部に一体形成されて、接続部の後端開口を閉鎖すると共に、スリットが径方向に形成され、筒部の縮小により、径方向外方に弾性変形して、スリットが開放され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、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、チューブ、又は、雌コネクターに、・ 前後方向に配設され、チューブと連通して、雌コネクター内に位置すると共に、後端が開口するチューブ状接続部が一体形成され、雌コネクター内に、・ 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備えられ、止血弁が、イ．接続部に後方から外嵌され、雄コネクターによる押圧時に、前方に弾性変形して、縮小する筒部と、ロ．筒部の後端部に一体形成されて、接続部の後端開口を閉鎖すると共に、内針により押し広げられて内針が挿通されるスリットが径方向に形成され、筒部の縮小により、径方向外方に弾性変形して、スリットが開放される開閉部を有することもある。
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４、図６及び図７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の後部の内周面には、前方に向かってテーパー状とされた接続用テーパー部９が形成され、このテーパー部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】
ところで、チューブ１、又は、雌コネクター２には、チューブ状接続部１１が一体形成されている。接続部１１は、前後方向に配設され、チューブ１と連通して、雌コネクター２内に位置すると共に、後端が開口している。本例では、チューブ１が後方に延長されて、該延長部分、即ち、接着剤８よりも後方部分が接続部１１とされている。
【００１３】
止血弁３は、雌コネクター２の接続用テーパー部９よりも前方に配設されるもので、弾性変形可能とされている。止血弁３は、筒部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料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。
【００１４】
筒部１３は、接続部１１に後方から外嵌され、内針ハブ及び雄コネクターにより前方に押圧されることで、前方に弾性変形して、縮小する。
【００１５】
開閉部１４は、筒部１３の後端部に一体形成されて、接続部１１の後端開口を閉鎖すると共に、図５に示すように、開閉部１４の中央部側には、内針により押し広げられて内針が挿通されるスリット１５が径方向に形成されており、筒部１３の縮小及び開閉部１４と接続部１１の後端との当接により、開閉部１４が径方向外方に弾性変形して、スリット１５が開放され、接続部１１に外嵌される。尚、スリット１５の長さは、筒部１３の内径及び接続部１１の外径と略同一か、それよりも若干大とされている。
【００１６】
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、前端部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。
【００１７】
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。
【００１８】
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。
【００１９】
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。
【００２０】
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及び図２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のスリット１５を弾性変形を介して押し広げながら、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を前方に押圧する。これにより、止血弁３の筒部１３が前方に弾性変形して、縮小すると共に、開閉部１４が、接続部１１の後端との当接により、更に径方向外方に弾性変形して、スリット１５が更に開放され、接続部１１に外嵌される。
【００２１】
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。
【００２２】
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。
【００２３】
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。
【００２４】
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の筒部１３が、その弾発力により、後方に伸長して、元の大きさに戻り、これにより、止血弁３の開閉部１４のスリット１５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。
【００２５】
その後、輸液や採血等を開始する際には、図６及び図７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の筒部１３が前方に弾性変形して、縮小し、この縮小及び開閉部１４と接続部１１の後端との当接により、開閉部１４が径方向外方に弾性変形して、スリット１５が開放され、接続部１１に外嵌される。そして、シリンジ２０により、輸液や採血等を開始する。
【００２６】
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の筒部１３が、その弾発力により、後方に伸長して、元の大きさに戻り、これにより、止血弁３の開閉部１４のスリット１５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。
【００２７】
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。又、止血弁３を、上記のように、単一の部材により構成したので、構造が簡易である。
【００２８】
【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、上記のように、単一の部材により構成したので、構造が簡易である。
【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の分解図である。
【図４】図３の要部拡大図である。
【図５】図４の止血弁の背面図である。
【図６】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７】図６の要部拡大図である。
【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
１１ 接続部
１３ 筒部
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 an artery, a vein, and the like. Also, the present invention relates to a catheter which can favorably prevent blood leakage from a catheter until an infusion line is connected.
[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, a 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, there is a problem that the structure is complicated because the hemostatic valve is composed of two parts.
[0007]
An object of the present invention is to provide an indwelling catheter which simplifies the structure of a hemostatic valve, reduces dead space in a female connector, and reduces the risk of causing an infection.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, the features of the present invention are as follows. B. tubes arranged in the front-back direction; In an indwelling catheter having a female connector which is hollow at both front and rear ends and is provided in communication with a rear portion of the tube, the tube or the female connector is disposed in the front-rear direction and communicates with the tube. And a tubular connecting portion which is located in the female connector and has an open rear end is integrally formed, and a hemostatic valve which is elastically deformable is provided in the female connector. A tubular portion fitted externally to the connecting portion from the rear and capable of being reduced by elastic deformation forward; Integrally formed at the rear end of the cylindrical part, closing the rear end opening of the connecting part and forming a slit in the radial direction. In that it has an opening and closing part.
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 portion of the tube and to which a male connector is separably connected; In an indwelling catheter having an inner needle which 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, the indwelling catheter is disposed in the tube or the female connector in a longitudinal direction and communicates with the tube. Then, a tubular connecting portion which is located in the female connector and has an open rear end is integrally formed.The hemostatic valve, which is elastically deformable and can be pushed forward by the male connector, is formed in the female connector. A hemostasis valve is provided. A tubular portion fitted externally to the connecting portion from behind and elastically deforming and contracting forward when pressed by the male connector; A slit formed integrally with the rear end of the cylindrical portion, closing the rear end opening of the connection portion, and being pushed and spread by the inner needle to form a slit through which the inner needle is inserted, is formed by reducing the cylindrical portion. There may be an opening / closing portion that is elastically deformed radially outward to open the slit.
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 4, 6 and 7, the tube 1 is elongated (semi-) transparent, flexible, integrally formed of a plastic (resin) material, It is arranged. 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. A connecting tapered portion 9 tapered forward is formed on the inner peripheral surface of the rear portion of the female connector 2, and a male connector such as a syringe is releasably connected in the tapered portion 9. . 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 tube 1 or the female connector 2 is integrally formed with a tube-shaped connecting portion 11. The connection portion 11 is disposed in the front-rear direction, communicates with the tube 1, is located in the female connector 2, and has an open rear end. In this example, the tube 1 is extended rearward, and the extended portion, that is, the portion behind the adhesive 8 is used as the connection portion 11.
[0013]
The hemostatic valve 3 is disposed forward of the connecting tapered portion 9 of the female connector 2 and is elastically deformable. The hemostatic valve 3 is formed by integrally forming a cylindrical portion 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, fluoro 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.
[0014]
The cylindrical portion 13 is fitted to the connecting portion 11 from the rear and pressed forward by the inner needle hub and the male connector, thereby elastically deforming and contracting forward.
[0015]
The opening / closing section 14 is formed integrally with the rear end of the cylindrical section 13 to close the opening at the rear end of the connecting section 11 and, as shown in FIG. A slit 15 into which the inner needle is inserted by being pushed out is formed in a radial direction, and the opening / closing portion 14 is moved radially outward by the contraction of the cylindrical portion 13 and the contact between the opening / closing portion 14 and the rear end of the connecting portion 11. It is elastically deformed in the direction, the slit 15 is opened, and is fitted to the connecting portion 11 outside. The length of the slit 15 is substantially the same as or slightly larger than the inner diameter of the cylindrical portion 13 and the outer diameter of the connecting portion 11.
[0016]
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).
[0017]
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.
[0018]
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.
[0019]
The filter 7 is mounted in the rear end of the filter cap 6.
[0020]
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, and the inner needle 4 is inserted through the tube 1 while pushing and expanding the slit 15 of the opening / closing portion 14 of the hemostatic valve 3 through elastic deformation. The hemostatic valve 3 is pressed forward by the needle hub 5. As a result, the tubular portion 13 of the hemostatic valve 3 elastically deforms forward and contracts, and the opening / closing portion 14 further elastically deforms radially outward due to contact with the rear end of the connecting portion 11. The slit 15 is further opened and fitted to the connection part 11.
[0021]
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.
[0022]
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.
[0023]
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.
[0024]
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 cylindrical portion 13 extends rearward due to its elastic force and returns to the original size, whereby the slit 15 of the opening / closing portion 14 of the hemostatic valve 3 is closed. Thereby, at the time of the removal of the inner needle 4, blood leakage or the like can be prevented.
[0025]
Thereafter, when infusion or blood collection is started, as shown in FIGS. 6 and 7, 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. Accordingly, similarly to the above, the tubular portion 13 of the hemostatic valve 3 elastically deforms forward and contracts, and the contraction and the contact between the open / close portion 14 and the rear end of the connection portion 11 cause the open / close portion 14 to move in the radial direction. After being elastically deformed outward, the slit 15 is opened, and is fitted to the connecting portion 11. Then, infusion and blood collection are started by the syringe 20.
[0026]
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. 13 expands rearward due to its elastic force and returns to its original size, whereby the slit 15 of the opening / closing section 14 of the hemostatic valve 3 is closed. This can prevent blood leakage and the like when the syringe is removed.
[0027]
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. Further, since the hemostatic valve 3 is constituted by a single member as described above, the structure is simple.
[0028]
【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 as described above, the structure is simple.
[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 an exploded view of FIG.
FIG. 4 is an enlarged view of a main part of FIG. 3;
FIG. 5 is a rear view of the hemostatic valve of FIG. 4;
6 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. 7 is an enlarged view of a main part of FIG. 6;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Tube 2 Female connector 3 Hemostatic valve 4 Inner needle 5 Inner needle hub 11 Connection part 13 Tube part 14 Opening / closing part 20 Syringe (male connector)

Claims (3)

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、
チューブ、又は、雌コネクターに、
・ 前後方向に配設され、チューブと連通して、雌コネクター内に位置すると共に、後端が開口するチューブ状接続部
が一体形成され、
雌コネクター内に、弾性変形可能とされた止血弁が備えられ、
止血弁が、
イ．接続部に後方から外嵌され、前方への弾性変形により、縮小可能とされた筒部と、
ロ．筒部の後端部に一体形成されて、接続部の後端開口を閉鎖すると共に、スリットが径方向に形成され、筒部の縮小により、径方向外方に弾性変形して、スリットが開放される開閉部
を有する留置用カテーテル。A. A tube arranged in the front-rear direction,
B. 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,
For tubes or female connectors,
A tube-shaped connecting portion that is arranged in the front-rear direction, communicates with the tube, is located in the female connector, and has an open rear end;
In the female connector, an elastically deformable hemostatic valve is provided,
Hemostasis valve
I. A tubular portion fitted externally to the connecting portion from behind, and made elastic by forward elastic deformation;
B. Integrally formed at the rear end of the cylindrical part, closing the rear end opening of the connecting part and forming a slit in the radial direction. Indwelling catheter having an opening / closing part to be opened. 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、
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、
チューブ、又は、雌コネクターに、
・ 前後方向に配設され、チューブと連通して、雌コネクター内に位置すると共に、後端が開口するチューブ状接続部
が一体形成され、
雌コネクター内に、
・ 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備えられ、
止血弁が、
イ．接続部に後方から外嵌され、雄コネクターによる押圧時に、前方に弾性変形して、縮小する筒部と、
ロ．筒部の後端部に一体形成されて、接続部の後端開口を閉鎖すると共に、内針により押し広げられて内針が挿通されるスリットが径方向に形成され、筒部の縮小により、径方向外方に弾性変形して、スリットが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,
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,
For tubes or female connectors,
A tube-shaped connecting portion that is arranged in the front-rear direction, communicates with the tube, is located in the female connector, and has an open rear end;
In the female connector,
・ A hemostatic valve, which is elastically deformable and can be pushed forward by a male connector, is provided,
Hemostasis valve
I. A tubular portion that is externally fitted to the connecting portion from the rear, and elastically deforms forward to shrink when pressed by the male connector;
B. A slit formed integrally with the rear end of the cylindrical portion, closing the rear end opening of the connection portion, and being pushed and spread by the inner needle to form a slit through which the inner needle is inserted, is formed by reducing the cylindrical portion. An indwelling catheter having an opening / closing portion that is elastically deformed radially outward to open a slit. 止血弁がゴム弾性材料から成る請求項１又は２記載の留置用カテーテル。3. The indwelling catheter according to claim 1, wherein the hemostatic valve is made of a rubber elastic material.
JP2003033636A 2003-02-12 2003-02-12 Indwelling catheter Expired - Fee Related JP4423861B2 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
JP2003033636A JP4423861B2 (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
EP04003051A EP1452201B1 (en) 2003-02-12 2004-02-11 Indwelling catheter with hemostasis valve
DE602004000710T DE602004000710T2 (en) 2003-02-12 2004-02-11 Indwelling catheter with a haemostatic valve
US11/905,047 US7914494B2 (en) 2003-02-12 2007-09-27 Indwelling catheter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2003033636A JP4423861B2 (en) 2003-02-12 2003-02-12 Indwelling catheter

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010038471A1 (en) 2008-10-03 2010-04-08 二プロ株式会社 Needle point protector and indwelling needle assembly
KR20200011686A (en) * 2018-07-25 2020-02-04 정준영 Medical needle
US11529474B2 (en) 2017-05-08 2022-12-20 Nipro Corporation Valved needle assembly

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JPS565668A (en) * 1979-05-10 1981-01-21 Mallinckrodt Chemical Works Suction control valve for suction catheter
JPS59131364A (en) * 1983-01-18 1984-07-28 テルモ株式会社 Cathetel with valve body
JPH04212375A (en) * 1990-02-01 1992-08-03 Critikon Inc Catheter with control valve
US5330435A (en) * 1993-04-08 1994-07-19 Vaillancourt Vincent L Valve for a catheter assembly
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JP2002528038A (en) * 1995-06-07 2002-08-27 アレジアンス コーポレイション Chest puncture catheter device with self-sealing valve
JP2002263197A (en) * 2001-03-12 2002-09-17 Medikit Kk Indwelling catheter
JP2004000374A (en) * 2002-06-03 2004-01-08 Enomoto Co Ltd Needle for catheter

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Publication number Priority date Publication date Assignee Title
JPS565668A (en) * 1979-05-10 1981-01-21 Mallinckrodt Chemical Works Suction control valve for suction catheter
JPS59131364A (en) * 1983-01-18 1984-07-28 テルモ株式会社 Cathetel with valve body
JPH04212375A (en) * 1990-02-01 1992-08-03 Critikon Inc Catheter with control valve
US5330435A (en) * 1993-04-08 1994-07-19 Vaillancourt Vincent L Valve for a catheter assembly
US5520666A (en) * 1994-12-06 1996-05-28 Abbott Laboratories Valved intravenous fluid line connector
JP2002528038A (en) * 1995-06-07 2002-08-27 アレジアンス コーポレイション Chest puncture catheter device with self-sealing valve
JP2002263197A (en) * 2001-03-12 2002-09-17 Medikit Kk Indwelling catheter
JP2004000374A (en) * 2002-06-03 2004-01-08 Enomoto Co Ltd Needle for catheter

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010038471A1 (en) 2008-10-03 2010-04-08 二プロ株式会社 Needle point protector and indwelling needle assembly
US8900199B2 (en) 2008-10-03 2014-12-02 Nipro Corporation Needle tip protector and indwelling needle assembly
US11529474B2 (en) 2017-05-08 2022-12-20 Nipro Corporation Valved needle assembly
KR20200011686A (en) * 2018-07-25 2020-02-04 정준영 Medical needle
KR102076414B1 (en) 2018-07-25 2020-03-02 정준영 Medical needle

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