JP2004275472A - Medical valve - Google Patents

Medical valve Download PDF

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Publication number
JP2004275472A
JP2004275472A JP2003071261A JP2003071261A JP2004275472A JP 2004275472 A JP2004275472 A JP 2004275472A JP 2003071261 A JP2003071261 A JP 2003071261A JP 2003071261 A JP2003071261 A JP 2003071261A JP 2004275472 A JP2004275472 A JP 2004275472A
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Prior art keywords
sealing
elastic seal
housing
connection port
medical valve
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JP4432339B2 (en
Inventor
Norihiro Hiejima
徳寛 比恵島
Masaru Suzuki
賢 鈴木
Kazuyoshi Harada
和良 原田
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Nipro Corp
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Nipro Corp
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
    • A61M39/22—Valves or arrangement of valves
    • A61M39/26—Valves closing automatically on disconnecting the line and opening on reconnection thereof
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/75—General characteristics of the apparatus with filters
    • A61M2205/7518—General characteristics of the apparatus with filters bacterial

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  • Health & Medical Sciences (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Pulmonology (AREA)
  • Engineering & Computer Science (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Hematology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a medical valve capable of being connected to a male lure when the inner diameter of the tip of the male lure is small. <P>SOLUTION: The medical valve comprises a hollow housing 1 opening at both upper and lower ends and an elastic seal 2. The upper part inside the housing 1 is a connection port 10 into which the tip 30 of the male lure 29 is detachably inserted, and an expanding part 13 whose inner diameter becomes larger downward is formed under the connection port 10 inside the housing 1. The elastic seal 2 comprises a sealing part 20 and a film part 21. The sealing part 20 constitutes the upper part of the elastic seal 2 to be fitted into the connection port 10, and a liquid feeding passage opening upward and outward in the radial direction is formed on the upper end surface of the sealing part 20. The film part 21 is disposed below the sealing part 20, and is hollow with the outer and inner diameters becoming larger downward. The film part 21 opens at the lower end and closes an expanding part 13 as fitted into the expanding part 13 and closely attached to the inner surface of the expanding part 13. A through hole 27 is formed to pierce through the closely attached part of the film part 21 to the expanding part 13. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【０００１】
【発明の属する技術分野】
本発明は医療用弁に関し、液体回路、例えば、輸液バッグ、輸液ライン（ルート）の途中、体外液体回路に備えられて、微量元素、ビタミン、抗生物質等の薬液の混注、補液、追加投与等を行うための混注プラグ等において、操作者の誤穿刺等の問題から金属針を用いずに、雄ルアーの接続により混注等を行えるものに関する。
【０００２】
【従来の技術】
金属針を用いずに、輸液ラインにシリンジや他の液体回路等の雄ルアーを接続する医療用弁として、ハウジングに内蔵されたスパイク体が、弾性シールにより被覆されたものがある（例えば、特許文献１参照。）。
【０００３】
このものでは、雄ルアーのチップの押圧により、弾性シールが下方に圧縮され、スパイク体が弾性シールに挿通されて、上方に露出し、雄ルアーのチップ内に進入する。これにより、雄ルアー内部とスパイク体内部の液体移送路が、スパイク体側面の開口を介して、連通し、液体が移送可能となる。又、雄ルアーのチップによる弾性シールの押圧を解除すると、圧縮状態の弾性シールが、その弾発力により、伸長して、元の大きさに戻り、スパイク体は弾性シール内にシールされる。
【０００４】
又、医療用弁として、ハウジング内にシール部材が軸心方向に移動自在に備えられると共に、シール部材が弾性体により付勢されて、シール部材のシール面がハウジング内面のシール面と当接することで、医療用弁が開閉可能に閉鎖されるものも提案されている（例えば、特許文献２，３参照。）。
【０００５】
【特許文献１】
特表平７―５０５０６４号公報
【特許文献２】
特開平８−１６８５３５号公報
【特許文献３】
特許第２７３６３９号公報
【０００６】
【発明が解決しようとする課題】
特許文献１等において、コスト面を考慮すると、スパイク体は、通常、樹脂製とされる。ところが、上記従来においては、スパイク体内部に液体移送路が形成されて、液体移送路が、スパイク体の外周壁部により完全に被覆されているため、スパイク体の外径を小さくすると、スパイク体の外周壁部を極めて薄くする必要があり、この場合には、スパイク体を樹脂で成形することは極めて困難となる。
【０００７】
このため、スパイク体が進入する雄ルアーのチップの内径は、大である方（例えば、内径が１．５ｍｍ以上）が好ましい。然しながら、雄ルアーがガラス製シリンジで、そのチップがガラス製の場合には、成形上の問題から、チップの内径を大にすることが困難であり、この場合には、チップ内にスパイク体を進入させることができず、雄ルアーと医療用弁を接続できないとの問題があった。
【０００８】
又、特許文献２，３等では、シール面の面積が小さいために、シール性を良好に保つためには、弾性体の弾発力を強くする必要がある。しかし、このようにすると、雄ルアーにより、弾性体を圧縮して、医療用弁に接続する際に、接続が固く感じられるとの問題があった。又、雄ルアーがスリップタイプの場合には、雄ルアーのチップを医療用弁のハウジング内にしっかり挿入しないと、弾性体の弾発力により、雄ルアーのチップがハウジングから離脱する惧れもあった。
【０００９】
本発明はこのような従来の問題点に鑑みてなされたもので、雄ルアーのチップの内径が小である場合にも、雄ルアーを容易に接続できると共に、シール性を良好に保ちながらも、雄ルアーの接続時に、接続が固く感じられることもなく、しかも、雄ルアーがスリップタイプの場合でも、雄ルアーのチップがハウジングから離脱する惧れもない医療用弁を提供することを目的とする。
【００１０】
【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、雄ルアーが分離可能に接続される医療用弁であって、上下両端が開口する中空状のハウジングと、弾性変形可能な弾性シールを有し、ハウジング内の上部が、雄ルアーのチップが挿脱自在に挿入される接続口とされ、ハウジング内における、接続口の下方に、下方に向かうに従って内径が大となる拡大部が設けられ、弾性シールは、イ．その上部を構成し、接続口内に嵌合されると共に、上端面に、上方及び径方向外方に開口する液体移送路が形成された封止部と、ロ．封止部の下方に配設され、下方に向かうに従って、外径及び内径が大となる中空状とされて、下端で開口すると共に、拡大部内に嵌合され、拡大部内面と密着して、拡大部を閉鎖し、拡大部との密着部に通過孔が貫通形成された膜部を有し、雄ルアーのチップにより、弾性シールの封止部が下方に押圧されて、弾性シールの膜部が下方に弾性変形し、膜部における、通過孔を含む上部側が拡大部から離間して、封止部の液体移送路が、拡大部の内部及び通過孔を介して、膜部の内部と連通する点にある。
又、封止部の液体移送路が、溝、又は、径方向に関して対向する一対の突起間とされることもある。
更に、雄ルアーが分離可能に接続される医療用弁であって、上下両端が開口する中空状のハウジングと、弾性変形可能な弾性シールを有し、ハウジング内の上部が、雄ルアーのチップが挿脱自在に挿入される接続口とされ、ハウジング内における、接続口の下方に、下方に向かうに従って内径が大となる拡大部が設けられ、ハウジングに、拡大部内に上下方向に配設される軸部が設けられ、弾性シールは、イ．その上部を構成し、下端で開口する中空状とされて、接続口内に嵌合されると共に、上端面に、スリット状の液体移送路が形成された封止部と、ロ．封止部の下方に配設され、下方に向かうに従って、外径が大となる中空状とされて、下端で開口し、拡大部内に嵌合されて、軸部を内有すると共に、拡大部内面と密着して、拡大部を閉鎖し、拡大部との密着部に通過孔が貫通形成された膜部を有し、雄ルアーのチップにより、弾性シールの封止部が下方に押圧されて、弾性シールの膜部が下方に弾性変形し、膜部における、通過孔を含む上部側が拡大部から離間すると共に、封止部が軸部に外嵌されて、封止部の上端部が軸部に押圧され、封止部の液体移送路が、上方及び径方向外方に開口すると共に、拡大部の内部及び通過孔を介して、膜部の内部と連通することもある。
又、封止部の上端部の下面の中央部に、・ 下方に突出し、雄ルアーのチップによる封止部の押圧時に、軸部と当接して、封止部の上端部の中央部を相対的に押し上げる突起が形成されることもある。
更に、封止部が接続口内面と密着することもある。
又、弾性シールがゴム弾性材料から成ることもある。
更に、ハウジングは、・ その下部を構成し、上下両端が開口する中空状とされて、上端開口が拡大部内部と連通し、下端開口が液体回路に接続される接続体を有し、接続体内に、異物除去及び除菌作用を行なうフィルターが備えられることもある。
又、接続体内に、・ 接続体を介しての液体移送前に、接続体内を閉鎖し、接続体を介しての液体移送時に、開放される閉鎖フィルムが備えられることもある。
更に、閉鎖フィルムが、フィルターよりも下方に配設されることもある。
【００１１】
【発明の実施の形態】
以下、本発明を混注プラグに適用した実施の形態の第１例を図１〜図３の図面に基づき説明すると、図１及び図３は混注プラグを示し、混注プラグは、ハウジング１と、弾性シール２から成る。
【００１２】
ハウジング１は、上下両端で開口する中空とされて、本体４と接続体５から成る。
【００１３】
本体４及び接続体５の構成材料としては、耐薬品性が良く、適度な硬さを有する樹脂材料が好ましく、例えば、ポリカーボネート樹脂、アクリル樹脂、硬質塩化ビニル樹脂、高密度ポリエチレン樹脂、ポリプロピレン樹脂、アクリルニトリル・ブタジエン・スチレンブロック共重合体樹脂、ポリアミド樹脂、ポリエチレンテレフタレート樹脂、ポリブチレンテレフタレート樹脂、ポリアセタール樹脂、フッ素樹脂、ポリフェニレンサルファイド樹脂、ポリエーテルサルフォン樹脂、ポリエーテルエーテルケトン樹脂、液晶ポリマー樹脂等が挙げられる。又、上記樹脂に、ガラス繊維又はグラファイト、無機フィラー、カーボンナノチューブ等を配合して、強度を強化したものを用いても良い。上記各種材料の内、ポリカーボネート樹脂、アクリル樹脂、ポリプロピレン樹脂、ポリエチレン樹脂、ポリブチレンテレフタレート等が好ましい。
【００１４】
本体４は、上下両端で開口する中空状とされて、上部が、雄ルアーが分離可能に接続される上流側（雄）連結部（（雄）継手手段、（雄）継手部）７とされ、外周面に雄螺子部８が形成されている。又、本体４の下端部には、径方向外方に突出するリング状のフランジ部９が形成されている。本体４の内部には、接続口１０、テーパー部１１、一定径部１２、拡大部１３が、上記の順で、下方に連設されている。接続口１０は、本体４内の上部を構成し、内径が（略）一定とされて、雄ルアーのチップが挿脱自在に挿入される。テーパー部１１は、上方に向かって、テーパー状とされ、一定径部１２は、上下方向に関して、内径が（略）一定とされている。拡大部１３は、下方に向かうに従って、内径が大となるもので（尚、拡大部１３と対応する外周面も、拡大部１３と対応する形状とされている。）、本例では、上方側に湾曲凸状となる湾曲面とされている。尚、拡大部１３を、円錐台の外周面形状としても良い。
【００１５】
接続体５は、中空状（図例では、略円筒状）とされて、下端で開口し、下端部が、液体回路、例えば、輸液バッグ、輸液ラインの途中、体外液体回路に接続されると共に、上端部の径方向中途部の貫通孔１５を介して、上端でも開口し、これにより、接続体５内部は本体４の拡大部１３内部とも連通している。接続体５の上端部には、径方向外方に突出するリング状のフランジ部１６が形成され、このフランジ部１６が、本体４のフランジ部９と、接着剤を介して、結合されることで、本体４と接続体５が一体化されている。接続体５の上端面の径方向中途部には、貫通孔１５の径方向外方に位置するリング状の突条部１７が形成されて、本体４の拡大部１３の下端部と径方向に関して対向している。接続体５の内面の上端部は、段付状に形成されて、下方に面状を呈する段付面１８とされている。
【００１６】
弾性シール２は、弾性変形可能とされて、封止部（栓部、第１シール部）２０と、膜部（シール部、第２シール部）２１を一体形成することで、構成されている。弾性シール２の構成材料としては、シール性及び弾性復元力がある材料が好ましく、例えば、天然ゴム、合成ポリイソプレンゴム、ブチルゴム、クロロプレンゴム、シリコーンゴム、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が挙げられる。この内、シリコーンゴム、合成ポリイソプレンゴム、熱可塑性エラストマー等が好ましい。
【００１７】
封止部２０は、弾性シール２の上部を構成し、下端で開口する中空状（本例では、略円筒状）とされており、封止部２０の上端部には、その下部よりも大径とされた大径部２３が形成され、下端部には、径方向外方に突出するリング状のフランジ部２４が形成されている。封止部２０は、接続口１０内に挿入され、大径部２３が接続口１０内面と密着して、接続口１０を実質的に閉鎖（閉塞）しており、大径部２３の上端面と本体４の上端面は（略）面一とされている。図２にも示すように、大径部２３の上端面には、上方及び径方向外方に開口する液体移送路（液体移送路）２５が形成されている。本例では、液体移送路２５は、断面半円形の溝とされているが、上方に突出する一対の突起（突条）間を液体移送路２５とすることもある。尚、液体移送路２５の深さは、例えば、大径部２３の肉厚の半分程度とされている。そして、雄ルアーにより封止部２０が下方に押圧されることで、弾性シール２の膜部２１が下方に弾性変形して、へこむと共に、封止部２０が本体４の拡大部１３内まで下降して、封止部２０の液体移送路２５が本体４の拡大部１３内と連通する
【００１８】
膜部２１は、封止部２０のフランジ部２４から下方に連設されており、上下両端で開口する中空状とされて、封止部２０内部と連通すると共に、下方に向かうに従って、外径及び内径が大となり、本体４の拡大部１３と対応している。膜部２１は、本例では、上方側に湾曲凸状となる湾曲面とされているが、膜部２１を円錐台の外周面形状としても良い。膜部２１は拡大部１３内に嵌合され、下端部が、拡大部１３の下端部と接続体５の突条部１７間に挿入（圧入）されて、固定され、拡大部１３内面と密着して、拡大部１３を閉鎖している。膜部２１の拡大部１３と密着する上部側には、内外を連通するための少なくとも一つの通過孔２７が貫通形成され、通常、この通過孔２７は拡大部１３内面により閉鎖されている。そして、雄ルアーによる封止部２０の押圧時に、膜部２１が下方に弾性変形して、へこみ、膜部２１における、通過孔２７を含む上部側が拡大部１３から離間する。
【００１９】
上記構成例では、混注プラグを介して、輸液、採血等を行なう場合には、混注プラグの上端面を消毒した後、例えば、図３に示すように、雄ルアーとして例示されるシリンジ２９のチップ３０を、ハウジング１の本体４の接続口１０内に上方から挿入する。
【００２０】
この際、図３の仮想線で示すように、シリンジ２９として、内面に雌螺子部が形成されたロック部材３１付きのものを使用し、このロック部材３１の雌螺子部を本体４の雄螺子部８に螺結すれば、シリンジ２９の上記挿入状態を確実に維持できる。
【００２１】
シリンジ２９のチップ３０の上記挿入により、弾性シール２３の封止部２０が下方に押圧され、弾性シール２の膜部２１が下方に弾性変形して、へこむと共に、封止部２０が本体４の拡大部１３内まで下降して、封止部２０の液体移送路２５が本体４の拡大部１３内と連通すると共に、膜部２１における、通過孔２７を含む上部側が拡大部１３から離間する。
【００２２】
これにより、図３の矢印で示すように、シリンジ２９内部が、封止部２０の液体移送路２５、本体４の拡大部１３の内部、通過孔２７、膜部２１の内部、貫通孔１５、接続体５内部を介して、液体回路と連通するので、輸液、採血等を従来同様に行なえる。
【００２３】
輸液、採血等が終了すれば、シリンジ２９のチップ３０をハウジング１の本体４の接続口１０内から抜去する。これによって、弾性シール２３の膜部２１の弾発力（弾性復元力）により、膜部２１の上部側が上方に膨れて、元の位置に戻り、本体４の拡大部１３と密着すると共に、通過孔２７が閉鎖される。これと同時に、封止部２０も上昇して、元の位置に戻り、本体４の接続口１０に挿入、嵌合されて、大径部２３が接続口１０と密着し、大径部２３の液体移送路２５と拡大部１３の連通が遮断されて、混注プラグは閉鎖状態となる。
【００２４】
上記構成例によれば、シリンジ２９のチップ３０に、従来のスパイク体等を挿入せず、チップ３０を本体４の接続口１０に単に挿入するだけにしたので、雄ルアーがガラス製シリンジ２９で、そのチップ３０がガラス製とされ、その内径が小の場合でも、シリンジ２９と混注プラグを容易に接続できる。
【００２５】
又、ハウジング１の接続体５側から接続口１０側に向かって、液体が高圧で逆流した場合でも、膜部２１の内部に液体の圧力が作用して、膜部２１を拡大部１３内面に押圧するので、通過孔２７が確実に閉塞され、シール性を良好に維持できる。それ故、弾性シール２の弾発力を、雄ルアーを混注プラグから分離した際における、膜部２１が元の位置に戻るだけの弾発力とできる。従って、雄ルアーにより、膜部２１を弾性変形させて、雄ルアーを混注プラグに接続した際に、接続が固く感じられることがないと共に、雄ルアーがスリップタイプの場合でも、雄ルアーのチップが接続口１０から離脱する惧れもない。
【００２６】
図４〜図６は本発明の実施の形態の第２例を示し、第１例の変形例であって、接続体５の上端面の中央部に、拡大部１３内に上下方向に配設される軸部３３が立設されている。又、図５に示すように、弾性シール２の封止部２０の大径部２３の上端面には、スリット状の液体移送路２５が形成されると共に、大径部２３の下面の中央部には、下方に突出する半球状の突起３４が一体形成されている。
【００２７】
上記構成例によれば、図６に示すように、雄ルアーとして例示されるシリンジ２９のチップ３０を、ハウジング１の本体４の接続口１０に挿入した際には、チップ３０により、弾性シール２の封止部２０が下方に押圧されて、弾性シール２の膜部２１が下方に弾性変形して、へこむと共に、封止部２０が拡大部１３内まで下降し、軸部３３に外嵌されて、封止部２０の大径部２３が軸部３３に押圧され、上端部の中央部が外周部側に対して相対的に押し上げられて、スリット状の液体移送路２５が上方及び径方向外方に良好に大きく開口する。
【００２８】
これにより、上記第１例と同様に、シリンジ２９内部が、封止部２０の液体移送路２５、本体４の拡大部１３、通過孔２７、膜部２１の内部、貫通孔１５、接続体５内部を介して、液体回路と連通する。
【００２９】
図７は本発明の実施の形態の第３例を示し、第２例の変形例であって、接続体５内の上端部に、異物除去及び除菌作用を行なうフィルター、又は、閉鎖フィルム等の内装体３６が配設、固定され、接続体５の段付面１８に当接している。
【００３０】
フィルターは、特に限定されず、例えば、メンブランタイプ、スクリーンタイプ、デプスタイプ、アニソトロピックタイプ等、通常、用いられる各タイプのフィルターが用いられる。上記の内、メンブランタイプのフィルターが特に好ましい。フィルターがメンブランタイプである場合、その孔径（目の粗さ）を、細菌の通過を阻止できる大きさである、０．０１μｍ〜１．０μｍとするのが好ましく、０．０１μｍ〜０．５μｍとするのがより好ましい。又、フィルターを形成する材料としては、酢酸セルロース、再生セルロース、セルロースエステル、ナイロン、ポリテトラフルオロエチレン、ポリスチレン、ポリカーボネート、アクリル系樹脂、ポリオレフィン、ポリビニリデンジフルオライド、ポリエーテルスルホン等が挙げられるが、これらに限定されるものではない。
【００３１】
閉鎖フィルムは、接続体５を介しての液体移送前に、接続体５内を閉鎖し、接続体５を介しての液体移送時に、開放されるもので、接続体５に圧入嵌合、又は、溶着することが好ましい。溶着方法としては、熱溶着、超音波溶着、高周波溶着等が考えられるが、異物の発生等を考慮すると、熱溶着が好適である。又、フィルムの材料は、耐薬品性を有し、接続体５と溶着できる材料、又は、嵌合できる樹脂であれば、特に限定されず、溶着する場合は、例えば、接続体５と相溶性を有しない樹脂とのポリマーブレンドが採用される。例えば、接続体５がポリエチレンで形成される場合、フィルムの材料としては、ポリエチレンとポリプロピレンのポリマーブレンドが好ましい。この場合、ポリエチレンとポリプロピレンとの混合比率は、３：７〜７：３が好ましい。
【００３２】
上記構成例のように、異物除去及び除菌作用を行なうフィルター、又は、閉鎖フィルム等の内装体３６を備えれば、万が一、雑菌が混注プラグの接続口１０から混入した場合にも、雑菌が薬液バッグ等の医療用液体回路に侵入する惧れを低減できる。又、混注プラグを薬液バッグに備えた場合に、閉鎖フィルムを混注プラグに備えておけば、薬液バックをオートクレーブ滅菌した際に、混注プラグのダメージを抑制できる。更に、上記の場合に、閉鎖フィルムが無いと、弾性シール２の成分が薬液内に溶出する可能性があるが、閉鎖フィルムを備えておけば、弾性シール２の溶出物の薬液内への混入も最低限に抑制できる。
【００３３】
図８は本発明の実施の形態の第４例を示し、第３例の変形例であって、接続体５内の上部に、異物除去及び除菌作用を行なうフィルター３８、固定部材３９、閉鎖フィルム４０が上記の順で配設されている。
【００３４】
固定部材３９は、接続体５に固着されて、フィルター３８を、接続体５の段付面１８との間で挟持固定している。固定部材３９は円盤状とされて、中央部に貫通孔４２が形成されている。固定部材３９は、接続体５と同一材質であることが好ましいが、耐薬品性が良く、接続体５と固着できる材質であれば、特に限定されない。
【００３５】
閉鎖フィルム４０は、固定部材３９の下面中央部に固着されて、固定部材３９の貫通孔４２を閉鎖している。
【００３６】
上記構成例によれば、接続体５を介しての液体移送前に、接続体５に接続された液体回路、例えば、薬液バッグの薬液等がフィルター３８に接触する惧れを無くすことができる。
【００３７】
尚、実施の形態は、本発明を混注プラグに適用したものであるが、本発明は、その他の医療用弁に適用可能である。
【００３８】
【発明の効果】
以上詳述したように、本発明によれば、雄ルアーのチップの内径が小である場合にも、雄ルアーを容易に接続できると共に、シール性を良好に保ちながらも、雄ルアーの接続時に、接続が固く感じられることもなく、しかも、雄ルアーがスリップタイプの場合でも、雄ルアーのチップがハウジングから離脱する惧れもない。
又、請求項４のように、封止部に突起を形成すれば、雄ルアーのチップをハウジングの接続口に挿入した際に、スリット状の液体移送路を上方及び径方向外方に良好に大きく開口させることができる。
更に、請求項５のように、封止部を接続口内面と密着させれば、弾性シールにより、２段のシールが可能となり、シール性を向上できる。
又、請求項７，８のように、接続体内に、異物除去及び除菌作用を行なうフィルター、又は、閉鎖フィルム等を備えれば、万が一、雑菌が医療用弁の接続口から混入した場合にも、雑菌が、医療用弁が備えられた液体回路に侵入する惧れを低減できる。又、医療用弁を薬液バッグに備えた場合に、閉鎖フィルムを医療用弁に備えておけば、薬液バックをオートクレーブ滅菌した際に、医療用弁のダメージを抑制できる。更に、上記の場合に、閉鎖フィルムが無いと、弾性シールの成分が薬液内に溶出する可能性があるが、閉鎖フィルムを備えておけば、弾性シールの溶出物の薬液内への混入も最低限に抑制できる。
更に、請求項９のように、閉鎖フィルムを、フィルターよりも下方に配設すれば、接続体を介しての液体移送前に、接続体に接続された液体回路内の薬液等がフィルターに接触する惧れを無くすことができる。
【図面の簡単な説明】
【図１】本発明の実施の形態の第１例を示す断面図である。
【図２】図１の弾性シールの封止部の平面図である。
【図３】図１の作動状態図である。
【図４】本発明の実施の形態の第２例を示す断面図である。
【図５】図４の弾性シールの封止部の平面図である。
【図６】図４の作動状態図である。
【図７】本発明の実施の形態の第３例を示す断面図である。
【図８】本発明の実施の形態の第４例を示す断面図である。
【符号の説明】
１ ハウジング
２ 弾性シール
４ 本体
５ 接続体
１０ 接続口
１３ 拡大部
２０ 封止部
２１ 膜部
２５ 液体移送路
２７ 通過孔
２９ シリンジ（雄ルアー）
３０ チップ
３３ 軸部
３４ 突起
３６ 内装体
３８ フィルター
４０ 閉鎖フィルム[0001]
TECHNICAL FIELD OF THE INVENTION
TECHNICAL FIELD The present invention relates to a medical valve, which is provided in a liquid circuit, for example, an infusion bag, an infusion line (route), an extracorporeal liquid circuit, and co-injection of a chemical solution such as trace elements, vitamins, and antibiotics, replacement fluid, and additional administration. And the like, which can perform a co-injection or the like by connecting a male luer without using a metal needle due to a problem such as an erroneous puncture of an operator.
[0002]
[Prior art]
As a medical valve for connecting a male luer such as a syringe or other liquid circuit to an infusion line without using a metal needle, there is a medical valve in which a spike body built in a housing is covered with an elastic seal (for example, see Patent Reference 1).
[0003]
In this device, when the tip of the male luer is pressed, the elastic seal is compressed downward, and the spike body is inserted through the elastic seal, exposed upward, and enters the male luer tip. Thus, the liquid transfer paths inside the male luer and the spike body communicate with each other via the opening on the side surface of the spike body, and the liquid can be transferred. When the pressing of the elastic seal by the tip of the male luer is released, the elastic seal in a compressed state expands and returns to its original size due to its elastic force, and the spike body is sealed in the elastic seal.
[0004]
Further, as a medical valve, a seal member is provided in the housing so as to be movable in the axial direction, and the seal member is urged by an elastic body so that the seal surface of the seal member comes into contact with the seal surface of the housing inner surface. There is also proposed a medical valve in which a medical valve is opened and closed (for example, see Patent Documents 2 and 3).
[0005]
[Patent Document 1]
Japanese Patent Publication No. 7-505054 [Patent Document 2]
JP-A-8-168535 [Patent Document 3]
Japanese Patent No. 273639 Publication
[Problems to be solved by the invention]
In Patent Document 1 and the like, in consideration of cost, the spike body is usually made of resin. However, in the related art, the liquid transfer path is formed inside the spike body, and the liquid transfer path is completely covered by the outer peripheral wall of the spike body. It is necessary to make the outer peripheral wall portion extremely thin, and in this case, it is extremely difficult to mold the spike body with resin.
[0007]
Therefore, it is preferable that the inner diameter of the tip of the male lure into which the spike body enters is larger (for example, the inner diameter is 1.5 mm or more). However, when the male luer is a glass syringe and the tip is made of glass, it is difficult to increase the inner diameter of the tip due to molding problems.In this case, a spike is inserted inside the tip. There was a problem that the male lure could not be entered and the medical valve could not be connected.
[0008]
In Patent Documents 2 and 3, etc., since the area of the sealing surface is small, it is necessary to increase the elasticity of the elastic body in order to maintain good sealing performance. However, in this case, when the elastic body is compressed by the male luer and connected to the medical valve, there is a problem that the connection is felt firmly. If the male luer is of the slip type, the male luer tip may come off the housing due to the elasticity of the elastic body unless the male luer tip is firmly inserted into the housing of the medical valve. Was.
[0009]
The present invention has been made in view of such conventional problems, and even when the inner diameter of the tip of the male luer is small, the male luer can be easily connected, while maintaining good sealing properties, An object of the present invention is to provide a medical valve in which a male luer does not feel firm when connected, and there is no fear that the male luer tip will come off the housing even when the male luer is of a slip type. .
[0010]
[Means for Solving the Problems]
In order to achieve the above object, a feature of the present invention is a medical valve to which a male luer is detachably connected, a hollow housing having upper and lower ends opened, and an elastic seal capable of elastic deformation. The upper part in the housing is a connection port into which the tip of the male luer is removably inserted, and an enlarged portion is provided below the connection port in the housing, the inner diameter of which becomes larger downward. And the elastic seal is a. A sealing part that forms the upper part thereof, is fitted in the connection port, and has a liquid transfer path formed on the upper end face and opening upward and radially outward; It is arranged below the sealing portion, and as it goes downward, the outer diameter and the inner diameter are hollow, and are opened at the lower end, and are fitted in the enlarged portion, and are in close contact with the inner surface of the enlarged portion, The enlarged portion is closed, and a sealing portion of the elastic seal is pressed downward by a male luer tip, and a sealing portion of the elastic seal is pressed downward by a male luer tip. Is elastically deformed downward, and the upper side of the membrane portion including the through hole is separated from the enlarged portion, and the liquid transfer path of the sealing portion communicates with the inside of the membrane portion through the inside of the enlarged portion and the through hole. Is to do.
Further, the liquid transfer path of the sealing portion may be a groove or a pair of protrusions facing each other in the radial direction.
Furthermore, a medical valve to which a male luer is separably connected, which has a hollow housing with open upper and lower ends and an elastic seal that can be elastically deformed, and the upper part in the housing has a male luer tip. A connection port that is removably inserted is provided. An enlarged portion having an inner diameter that becomes larger downward is provided below the connection port in the housing, and the housing is vertically disposed in the enlarged portion. A shaft portion is provided, and the elastic seal is a. A sealing part which forms the upper part, is hollow at the lower end, is fitted in the connection port, and has a slit-shaped liquid transfer path formed on the upper end face; It is disposed below the sealing portion, and has a hollow shape whose outer diameter increases as going downward, opens at the lower end, is fitted in the enlarged portion, has a shaft portion inside, and has an inner surface of the enlarged portion. In close contact with the enlarged portion, the enlarged portion has a membrane portion in which a through hole is formed through the contact portion with the enlarged portion, and the sealing portion of the elastic seal is pressed downward by the male luer tip, The membrane portion of the elastic seal is elastically deformed downward, the upper side of the membrane portion including the through hole is separated from the enlarged portion, and the sealing portion is fitted on the shaft portion, and the upper end portion of the sealing portion is the shaft portion. , The liquid transfer passage of the sealing portion is opened upward and radially outward, and may communicate with the inside of the membrane portion through the inside of the enlarged portion and the passage hole.
Also, at the central part of the lower surface of the upper end of the sealing part, when projecting downward, when the male luer tip presses the sealing part, it comes into contact with the shaft part, and the central part of the upper end of the sealing part is relatively positioned. In some cases, a projection that pushes up is formed.
Further, the sealing portion may come into close contact with the inner surface of the connection port.
Also, the elastic seal may be made of a rubber elastic material.
Further, the housing has a lower body, a hollow body having upper and lower ends opened, a top end opening communicating with the inside of the enlarged portion, and a lower end opening connected to the liquid circuit. In some cases, a filter for removing foreign substances and removing bacteria is provided.
In addition, the connecting body may be provided with a closing film that closes the connecting body before transferring the liquid through the connecting body and that is opened when the liquid is transferred through the connecting body.
Further, a closure film may be disposed below the filter.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, a first example of an embodiment in which the present invention is applied to a co-injection plug will be described with reference to FIGS. 1 to 3. FIGS. 1 and 3 show a co-injection plug. Consists of a seal 2.
[0012]
The housing 1 is made hollow at both upper and lower ends, and includes a main body 4 and a connecting body 5.
[0013]
As a constituent material of the main body 4 and the connection body 5, a resin material having good chemical resistance and appropriate hardness is preferable. For example, polycarbonate resin, acrylic resin, hard vinyl chloride resin, high-density polyethylene resin, polypropylene resin, Acrylic nitrile / butadiene / styrene block copolymer resin, polyamide resin, polyethylene terephthalate resin, polybutylene terephthalate resin, polyacetal resin, fluorine resin, polyphenylene sulfide resin, polyether sulfone resin, polyether ether ketone resin, liquid crystal polymer resin, etc. Is mentioned. Further, a resin whose strength is enhanced by blending glass fiber or graphite, an inorganic filler, a carbon nanotube, or the like with the above resin may be used. Among the above various materials, polycarbonate resin, acrylic resin, polypropylene resin, polyethylene resin, polybutylene terephthalate and the like are preferable.
[0014]
The main body 4 is hollow at both upper and lower ends, and the upper part is an upstream (male) connecting portion ((male) coupling means, (male) coupling portion) 7 to which a male luer is separably connected. A male screw portion 8 is formed on the outer peripheral surface. Further, a ring-shaped flange portion 9 protruding radially outward is formed at a lower end portion of the main body 4. Inside the main body 4, a connection port 10, a tapered portion 11, a constant diameter portion 12, and an enlarged portion 13 are sequentially provided downward in the above order. The connection port 10 constitutes an upper part in the main body 4 and has a (substantially) constant inner diameter, into which a male luer tip is removably inserted. The tapered portion 11 is tapered upward, and the constant diameter portion 12 has an (approximately) constant inner diameter in the vertical direction. The enlarged portion 13 has a larger inner diameter as it goes downward (the outer peripheral surface corresponding to the enlarged portion 13 also has a shape corresponding to the enlarged portion 13), and in this example, the upper side. The curved surface has a curved convex shape. The enlarged portion 13 may have a truncated cone outer peripheral surface shape.
[0015]
The connecting body 5 is formed in a hollow shape (in the illustrated example, a substantially cylindrical shape) and opens at a lower end, and the lower end is connected to a liquid circuit, for example, an infusion bag, an infusion line, and an extracorporeal liquid circuit. The upper end is also opened at the upper end through a through hole 15 at a radially intermediate portion, whereby the inside of the connection body 5 is also communicated with the inside of the enlarged portion 13 of the main body 4. A ring-shaped flange portion 16 protruding radially outward is formed at an upper end portion of the connection body 5, and the flange portion 16 is coupled to the flange portion 9 of the main body 4 via an adhesive. Thus, the main body 4 and the connecting body 5 are integrated. A ring-shaped ridge 17 located radially outward of the through-hole 15 is formed in a radially intermediate portion of the upper end surface of the connection body 5, and is formed radially outward with respect to the lower end of the enlarged portion 13 of the main body 4. They are facing each other. The upper end of the inner surface of the connection body 5 is formed in a stepped shape, and is a stepped surface 18 having a planar shape downward.
[0016]
The elastic seal 2 can be elastically deformed, and is configured by integrally forming a sealing portion (plug portion, first sealing portion) 20 and a film portion (sealing portion, second sealing portion) 21. . As a constituent material of the elastic seal 2, a material having a sealing property and an elastic restoring force is preferable. For example, natural rubber, synthetic polyisoprene rubber, butyl rubber, chloroprene rubber, silicone rubber, urethane rubber, styrene butadiene rubber, ethylene propylene rubber , Acrylic rubber, fluorine rubber, thermoplastic elastomer and the like. Among them, silicone rubber, synthetic polyisoprene rubber, thermoplastic elastomer and the like are preferable.
[0017]
The sealing portion 20 constitutes an upper portion of the elastic seal 2 and has a hollow shape (in this example, a substantially cylindrical shape) opened at a lower end, and the upper end portion of the sealing portion 20 is larger than the lower portion. A large-diameter portion 23 having a diameter is formed, and a ring-shaped flange portion 24 protruding radially outward is formed at a lower end portion. The sealing portion 20 is inserted into the connection port 10, and the large-diameter portion 23 is in close contact with the inner surface of the connection port 10 to substantially close (close) the connection port 10. And the upper end surface of the main body 4 is (substantially) flush. As shown in FIG. 2, a liquid transfer path (liquid transfer path) 25 that opens upward and radially outward is formed on the upper end surface of the large diameter portion 23. In this example, the liquid transfer path 25 is a groove having a semicircular cross section. However, the liquid transfer path 25 may be formed between a pair of protrusions (projections) projecting upward. Note that the depth of the liquid transfer path 25 is, for example, about half the thickness of the large diameter portion 23. When the sealing portion 20 is pressed downward by the male luer, the film portion 21 of the elastic seal 2 is elastically deformed downward, and dents, and the sealing portion 20 is lowered into the enlarged portion 13 of the main body 4. As a result, the liquid transfer path 25 of the sealing portion 20 communicates with the inside of the enlarged portion 13 of the main body 4.
The film part 21 is provided continuously below the flange part 24 of the sealing part 20, has a hollow shape opened at both upper and lower ends, communicates with the inside of the sealing part 20, and has an outer diameter that goes downward. And the inner diameter becomes large, and corresponds to the enlarged portion 13 of the main body 4. In the present embodiment, the film portion 21 has a curved surface that is curved and convex upward, but the film portion 21 may have an outer peripheral shape of a truncated cone. The membrane portion 21 is fitted into the enlarged portion 13, and the lower end portion is inserted (press-fitted) between the lower end portion of the enlarged portion 13 and the ridge portion 17 of the connecting body 5 and fixed, and is in close contact with the inner surface of the enlarged portion 13. Then, the enlarged portion 13 is closed. At least one through hole 27 for communicating between the inside and the outside is formed through the upper side of the membrane portion 21 which is in close contact with the enlarged portion 13, and the through hole 27 is normally closed by the inner surface of the enlarged portion 13. Then, when the sealing portion 20 is pressed by the male luer, the membrane portion 21 is elastically deformed downward and dents, and the upper side of the membrane portion 21 including the passage hole 27 is separated from the enlarged portion 13.
[0019]
In the above configuration example, when performing infusion, blood collection, and the like via the co-injection plug, after disinfecting the upper end surface of the co-infusion plug, for example, as shown in FIG. 3, the tip of the syringe 29 exemplified as a male luer 30 is inserted into the connection port 10 of the main body 4 of the housing 1 from above.
[0020]
At this time, as shown by a virtual line in FIG. 3, a syringe 29 having a lock member 31 having a female screw portion formed on the inner surface is used as the syringe 29, and the female screw portion of the lock member 31 is used as the male screw of the main body 4. By screwing the syringe 29 to the portion 8, the above-described inserted state of the syringe 29 can be reliably maintained.
[0021]
Due to the insertion of the tip 30 of the syringe 29, the sealing portion 20 of the elastic seal 23 is pressed downward, and the film portion 21 of the elastic seal 2 is elastically deformed downward, and dents. The liquid transfer path 25 of the sealing portion 20 is communicated with the inside of the enlarged portion 13 of the main body 4, and the upper side of the membrane portion 21 including the passage hole 27 is separated from the enlarged portion 13.
[0022]
Thereby, as shown by the arrow in FIG. 3, the inside of the syringe 29 includes the liquid transfer path 25 of the sealing part 20, the inside of the enlarged part 13 of the main body 4, the through hole 27, the inside of the membrane part 21, the through hole 15, Since it communicates with the liquid circuit via the inside of the connector 5, infusion, blood collection, and the like can be performed as in the related art.
[0023]
When the infusion, blood collection and the like are completed, the tip 30 of the syringe 29 is removed from the connection port 10 of the main body 4 of the housing 1. Due to this, the upper side of the film portion 21 swells upward due to the resilience (elastic restoring force) of the film portion 21 of the elastic seal 23, returns to the original position, and comes into close contact with the enlarged portion 13 of the main body 4 and passes therethrough. The hole 27 is closed. At the same time, the sealing portion 20 also rises, returns to the original position, is inserted and fitted into the connection port 10 of the main body 4, the large-diameter portion 23 comes into close contact with the connection port 10, and the large-diameter portion 23 The communication between the liquid transfer passage 25 and the enlarged portion 13 is cut off, and the co-injection plug is closed.
[0024]
According to the above configuration example, the conventional spike body or the like is not inserted into the tip 30 of the syringe 29, but the tip 30 is simply inserted into the connection port 10 of the main body 4. Therefore, the male luer is made of the glass syringe 29. Even when the tip 30 is made of glass and has a small inner diameter, the syringe 29 and the co-injection plug can be easily connected.
[0025]
Further, even when the liquid flows backward at a high pressure from the connection body 5 side to the connection port 10 side of the housing 1, the pressure of the liquid acts on the inside of the membrane portion 21 to move the membrane portion 21 to the inner surface of the enlarged portion 13. Since the pressing is performed, the passage hole 27 is reliably closed, and the sealing property can be maintained satisfactorily. Therefore, the elastic force of the elastic seal 2 can be set to an elastic force enough to return the membrane portion 21 to the original position when the male luer is separated from the co-injection plug. Accordingly, when the membrane portion 21 is elastically deformed by the male luer and the male luer is connected to the co-injection plug, the connection is not felt firmly. There is no fear of detaching from the connection port 10.
[0026]
4 to 6 show a second example of the embodiment of the present invention, which is a modification of the first example, and is disposed vertically in the enlarged portion 13 at the center of the upper end surface of the connector 5. A shaft portion 33 is provided upright. As shown in FIG. 5, a slit-shaped liquid transfer path 25 is formed on the upper end surface of the large diameter portion 23 of the sealing portion 20 of the elastic seal 2, and a central portion of the lower surface of the large diameter portion 23 is formed. Is integrally formed with a hemispherical projection 34 projecting downward.
[0027]
According to the above configuration example, when the tip 30 of the syringe 29 exemplified as a male luer is inserted into the connection port 10 of the main body 4 of the housing 1 as shown in FIG. The sealing portion 20 of the elastic seal 2 is pressed downward, the film portion 21 of the elastic seal 2 is elastically deformed downward, and dents, and at the same time, the sealing portion 20 is lowered into the enlarged portion 13 and fitted to the shaft portion 33. Then, the large-diameter portion 23 of the sealing portion 20 is pressed by the shaft portion 33, and the central portion of the upper end portion is pushed up relatively to the outer peripheral side, so that the slit-shaped liquid transfer path 25 is moved upward and in the radial direction. It opens well large outward.
[0028]
As a result, similarly to the first example, the inside of the syringe 29 is filled with the liquid transfer path 25 of the sealing part 20, the enlarged part 13 of the main body 4, the through hole 27, the inside of the membrane part 21, the through hole 15, the connecting body 5, and the like. It communicates with the liquid circuit through the interior.
[0029]
FIG. 7 shows a third example of the embodiment of the present invention, which is a modification of the second example, in which a filter or a closing film for removing foreign substances and removing bacteria is provided at the upper end in the connector 5. Are arranged and fixed, and are in contact with the stepped surface 18 of the connection body 5.
[0030]
The filter is not particularly limited, and for example, a filter of each type usually used such as a membrane type, a screen type, a depth type, and an anisotropic type is used. Of the above, membrane type filters are particularly preferred. When the filter is a membrane type, the pore size (grain size) is preferably 0.01 μm to 1.0 μm, which is a size that can prevent the passage of bacteria, and 0.01 μm to 0.5 μm. More preferably, Examples of the material forming the filter include cellulose acetate, regenerated cellulose, cellulose ester, nylon, polytetrafluoroethylene, polystyrene, polycarbonate, acrylic resin, polyolefin, polyvinylidene difluoride, polyether sulfone, and the like. However, the present invention is not limited to these.
[0031]
The closing film closes the inside of the connecting body 5 before the liquid is transferred through the connecting body 5, and is opened when the liquid is transferred through the connecting body 5. It is preferable to weld. As the welding method, thermal welding, ultrasonic welding, high-frequency welding, and the like can be considered. However, considering the generation of foreign matter, etc., thermal welding is preferable. The material of the film is not particularly limited as long as it has a chemical resistance and can be welded to the connection body 5 or a resin that can be fitted. When it is welded, for example, it is compatible with the connection body 5. A polymer blend with a resin having no is used. For example, when the connection body 5 is formed of polyethylene, the material of the film is preferably a polymer blend of polyethylene and polypropylene. In this case, the mixing ratio of polyethylene and polypropylene is preferably 3: 7 to 7: 3.
[0032]
As in the above configuration example, if a filter for removing foreign substances and removing bacteria is provided, or if an inner body 36 such as a closing film is provided, even if germs are mixed in from the connection port 10 of the mixed injection plug, germs can be removed. It is possible to reduce the risk of entering a medical liquid circuit such as a chemical liquid bag. In addition, when the co-injection plug is provided in the chemical solution bag and the closing film is provided in the co-injection plug, damage to the co-injection plug can be suppressed when the medical solution bag is autoclaved. Further, in the above case, if there is no closing film, the components of the elastic seal 2 may elute into the chemical solution. However, if the closing film is provided, the eluate of the elastic seal 2 may be mixed into the chemical solution. Can also be minimized.
[0033]
FIG. 8 shows a fourth example of the embodiment of the present invention, which is a modification of the third example, in which a filter 38 for removing foreign matter and sterilization, a fixing member 39, a closure The films 40 are arranged in the above order.
[0034]
The fixing member 39 is fixed to the connecting body 5, and fixes the filter 38 between the stepped surface 18 of the connecting body 5 and the filter 38. The fixing member 39 is formed in a disk shape, and has a through hole 42 formed in the center. The fixing member 39 is preferably made of the same material as the connecting body 5, but is not particularly limited as long as it has good chemical resistance and can be fixed to the connecting body 5.
[0035]
The closing film 40 is fixed to the center of the lower surface of the fixing member 39 and closes the through hole 42 of the fixing member 39.
[0036]
According to the above configuration example, it is possible to eliminate the possibility that the liquid circuit connected to the connector 5, for example, the liquid medicine of the liquid medicine bag may contact the filter 38 before the liquid is transferred through the connector 5.
[0037]
In the embodiment, the present invention is applied to a co-injection plug, but the present invention is applicable to other medical valves.
[0038]
【The invention's effect】
As described above in detail, according to the present invention, even when the inner diameter of the tip of the male luer is small, the male luer can be easily connected, and the sealing performance can be kept good while the male luer is connected. Also, the connection is not felt firmly, and even when the male luer is of the slip type, there is no fear that the tip of the male luer will come off the housing.
Further, if the projection is formed on the sealing portion as described in claim 4, when the male luer tip is inserted into the connection port of the housing, the slit-like liquid transfer path is favorably formed upward and radially outward. A large opening can be provided.
Furthermore, when the sealing portion is brought into close contact with the inner surface of the connection port as described in claim 5, two-stage sealing can be performed by the elastic seal, and the sealing performance can be improved.
In addition, if a filter for removing foreign matter and sterilizing action or a closing film is provided in the connection body as in claims 7 and 8, in the event that various bacteria enter the connection port of the medical valve, In addition, it is possible to reduce the possibility that bacteria enter the liquid circuit provided with the medical valve. Further, when the medical valve is provided in the medical solution bag and the closing film is provided in the medical valve, damage to the medical valve can be suppressed when the medical solution bag is sterilized in an autoclave. Furthermore, in the above case, if there is no closure film, the components of the elastic seal may be eluted into the chemical solution. It can be suppressed to the limit.
Furthermore, if the closing film is disposed below the filter as in claim 9, the liquid medicine and the like in the liquid circuit connected to the connector come into contact with the filter before the liquid is transferred through the connector. Can be eliminated.
[Brief description of the drawings]
FIG. 1 is a sectional view showing a first example of an embodiment of the present invention.
FIG. 2 is a plan view of a sealing portion of the elastic seal of FIG.
FIG. 3 is an operation state diagram of FIG. 1;
FIG. 4 is a sectional view showing a second example of the embodiment of the present invention.
FIG. 5 is a plan view of a sealing portion of the elastic seal of FIG. 4;
FIG. 6 is an operation state diagram of FIG. 4;
FIG. 7 is a sectional view showing a third example of the embodiment of the present invention.
FIG. 8 is a sectional view showing a fourth example of the embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Housing 2 Elastic seal 4 Main body 5 Connection body 10 Connection port 13 Enlarged part 20 Sealing part 21 Membrane part 25 Liquid transfer channel 27 Passage hole 29 Syringe (male luer)
30 Chip 33 Shaft 34 Projection 36 Inner body 38 Filter 40 Closing film

Claims (9)

雄ルアーが分離可能に接続される医療用弁であって、
上下両端が開口する中空状のハウジングと、弾性変形可能な弾性シールを有し、
ハウジング内の上部が、雄ルアーのチップが挿脱自在に挿入される接続口とされ、
ハウジング内における、接続口の下方に、下方に向かうに従って内径が大となる拡大部が設けられ、
弾性シールは、
イ．その上部を構成し、接続口内に嵌合されると共に、上端面に、上方及び径方向外方に開口する液体移送路が形成された封止部と、
ロ．封止部の下方に配設され、下方に向かうに従って、外径及び内径が大となる中空状とされて、下端で開口すると共に、拡大部内に嵌合され、拡大部内面と密着して、拡大部を閉鎖し、拡大部との密着部に通過孔が貫通形成された膜部
を有し、
雄ルアーのチップにより、弾性シールの封止部が下方に押圧されて、弾性シールの膜部が下方に弾性変形し、膜部における、通過孔を含む上部側が拡大部から離間して、封止部の液体移送路が、拡大部の内部及び通過孔を介して、膜部の内部と連通する医療用弁。A medical valve to which a male luer is separably connected,
It has a hollow housing whose upper and lower ends are open, and an elastic seal that can be elastically deformed,
The upper part in the housing is a connection port into which the male luer tip is inserted removably,
In the housing, below the connection port, an enlarged portion whose inner diameter becomes larger downward is provided,
The elastic seal is
I. A sealing portion that constitutes the upper portion, is fitted in the connection port, and has a liquid transfer path formed on the upper end surface and opening upward and radially outward,
B. It is arranged below the sealing portion, and as it goes downward, the outer diameter and the inner diameter are hollow, and are opened at the lower end, and are fitted in the enlarged portion, and are in close contact with the inner surface of the enlarged portion, Closing the enlarged portion, having a membrane portion in which a through hole is formed in a close contact portion with the enlarged portion,
The sealing portion of the elastic seal is pressed downward by the tip of the male luer, and the membrane portion of the elastic seal is elastically deformed downward, and the upper side of the membrane portion including the through hole is separated from the enlarged portion and sealed. A medical valve in which a liquid transfer passage of the part communicates with the inside of the membrane part through the inside of the enlarged part and the passage hole. 封止部の液体移送路が、溝、又は、径方向に関して対向する一対の突起間とされた請求項１又は２記載の医療用弁。The medical valve according to claim 1, wherein the liquid transfer path of the sealing portion is a groove or a pair of radially opposed protrusions. 雄ルアーが分離可能に接続される医療用弁であって、
上下両端が開口する中空状のハウジングと、弾性変形可能な弾性シールを有し、
ハウジング内の上部が、雄ルアーのチップが挿脱自在に挿入される接続口とされ、
ハウジング内における、接続口の下方に、下方に向かうに従って内径が大となる拡大部が設けられ、
ハウジングに、拡大部内に上下方向に配設される軸部が設けられ、
弾性シールは、
イ．その上部を構成し、下端で開口する中空状とされて、接続口内に嵌合されると共に、上端面に、スリット状の液体移送路が形成された封止部と、
ロ．封止部の下方に配設され、下方に向かうに従って、外径が大となる中空状とされて、下端で開口し、拡大部内に嵌合されて、軸部を内有すると共に、拡大部内面と密着して、拡大部を閉鎖し、拡大部との密着部に通過孔が貫通形成された膜部
を有し、
雄ルアーのチップにより、弾性シールの封止部が下方に押圧されて、弾性シールの膜部が下方に弾性変形し、膜部における、通過孔を含む上部側が拡大部から離間すると共に、封止部が軸部に外嵌されて、封止部の上端部が軸部に押圧され、封止部の液体移送路が、上方及び径方向外方に開口すると共に、拡大部の内部及び通過孔を介して、膜部の内部と連通する医療用弁。A medical valve to which a male luer is separably connected,
It has a hollow housing whose upper and lower ends are open, and an elastic seal that can be elastically deformed,
The upper part in the housing is a connection port into which the male luer tip is inserted removably,
In the housing, below the connection port, an enlarged portion whose inner diameter becomes larger downward is provided,
The housing is provided with a shaft portion that is disposed vertically in the enlarged portion,
The elastic seal is
I. Forming the upper part, is formed in a hollow shape opened at the lower end, and fitted into the connection port, on the upper end surface, a sealing portion formed with a slit-shaped liquid transfer path,
B. It is disposed below the sealing portion, and has a hollow shape whose outer diameter increases as going downward, opens at the lower end, is fitted in the enlarged portion, has a shaft portion inside, and has an inner surface of the enlarged portion. Close to the enlarged portion, having a membrane portion in which a through-hole is formed in a contact portion with the enlarged portion,
The sealing portion of the elastic seal is pressed downward by the male luer tip, and the membrane portion of the elastic seal is elastically deformed downward, so that the upper side of the membrane portion including the through hole is separated from the enlarged portion and sealed. The part is externally fitted to the shaft part, the upper end part of the sealing part is pressed against the shaft part, and the liquid transfer path of the sealing part opens upward and radially outward, and the inside of the enlarged part and the passage hole. A medical valve that communicates with the inside of the membrane via the 封止部の上端部の下面の中央部に、
・ 下方に突出し、雄ルアーのチップによる封止部の押圧時に、軸部と当接して、封止部の上端部の中央部を相対的に押し上げる突起
が形成された請求項３記載の医療用弁。At the center of the lower surface of the upper end of the sealing part,
The medical device according to claim 3, wherein a projection is formed which protrudes downward and comes into contact with the shaft when the sealing portion is pressed by the tip of the male luer and relatively pushes up the central portion of the upper end portion of the sealing portion. valve. 封止部が接続口内面と密着した請求項１〜４の何れかに記載の医療用弁。The medical valve according to claim 1, wherein the sealing portion is in close contact with the inner surface of the connection port. 弾性シールがゴム弾性材料から成る請求項１〜５の何れかに記載の医療用弁。The medical valve according to any one of claims 1 to 5, wherein the elastic seal is made of a rubber elastic material. ハウジングは、
・ その下部を構成し、上下両端が開口する中空状とされて、上端開口が拡大部内部と連通し、下端開口が液体回路に接続される接続体
を有し、
接続体内に、異物除去及び除菌作用を行なうフィルターが備えられた請求項１〜６の何れかに記載の医療用弁。The housing is
A lower end thereof, a hollow body having upper and lower ends open, an upper end opening communicating with the inside of the enlarged portion, and a lower end opening having a connector connected to the liquid circuit;
The medical valve according to any one of claims 1 to 6, wherein a filter for removing foreign matter and removing bacteria is provided in the connection body. 接続体内に、
・ 接続体を介しての液体移送前に、接続体内を閉鎖し、接続体を介しての液体移送時に、開放される閉鎖フィルム
が備えられた請求項１〜７記載の医療用弁。Inside the connection,
The medical valve according to any one of claims 1 to 7, further comprising a closing film that closes the connection body before transferring the liquid through the connecting body and opens when the liquid is transferred through the connecting body. 閉鎖フィルムが、フィルターよりも下方に配設された請求項８記載の医療用弁。9. The medical valve according to claim 8, wherein the closing film is disposed below the filter.
JP2003071261A 2003-03-17 2003-03-17 Medical valve Expired - Fee Related JP4432339B2 (en)

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JP2013523337A (en) * 2010-04-05 2013-06-17 ダニエル ピーワイ Sterile connector and method with a pending bendable ring
WO2013099261A1 (en) * 2011-12-27 2013-07-04 二プロ株式会社 Needleless connector
JP2014528807A (en) * 2011-10-06 2014-10-30 ベクトン・ディキンソン・アンド・カンパニーＢｅｃｔｏｎ， Ｄｉｃｋｉｎｓｏｎ Ａｎｄ Ｃｏｍｐａｎｙ Stretch non-penetrating blood control valve that can be used in various ways
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JP2013523337A (en) * 2010-04-05 2013-06-17 ダニエル ピーワイ Sterile connector and method with a pending bendable ring
US9726314B2 (en) 2010-04-05 2017-08-08 Dr. Py Institute Llc Aseptic connector with deflectable ring of concern and method
JP2014528807A (en) * 2011-10-06 2014-10-30 ベクトン・ディキンソン・アンド・カンパニーＢｅｃｔｏｎ， Ｄｉｃｋｉｎｓｏｎ Ａｎｄ Ｃｏｍｐａｎｙ Stretch non-penetrating blood control valve that can be used in various ways
WO2013099261A1 (en) * 2011-12-27 2013-07-04 二プロ株式会社 Needleless connector
CN104023786A (en) * 2011-12-27 2014-09-03 尼普洛株式会社 Needleless connector
JPWO2013099261A1 (en) * 2011-12-27 2015-04-30 ニプロ株式会社 Needleless connector
US9238128B2 (en) 2011-12-27 2016-01-19 Nipro Corporation Needleless connector
CN111150933A (en) * 2019-09-02 2020-05-15 杭州神络医疗科技有限公司 Catheter electrode and in vivo implanted nerve stimulation device
CN111150933B (en) * 2019-09-02 2022-08-09 杭州神络医疗科技有限公司 Catheter electrode and in vivo implanted nerve stimulation device

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