Positive flow valve

A - Human Necessities – 61 – M

Patent

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Details

A61M 39/26 (2006.01) A61M 39/10 (2006.01)

Patent

CA 2275218

A closed system, spikeless, positive-flow valve device includes a body defining an internal cavity. At the proximal end of the body is an opening which is preferably sufficiently large to receive an ANSI standard tip of a medical implement. The valve includes a plastic, resilient silicon seal which fills the upper cavity and opening with an oval seal cap having a slit. The opening presses the oval seal cap to keep the slit closed in the decompressed state. The slit opens as the nose of the medical implement compresses the seal into the cavity and the seal cap is free from the opening. The housing also includes a fluid space which facilitates fluid flow between the medical implement and a catheter tip. The fluid space within the valve automatically and reversibly increases upon insertion of the medical implement into the cavity and decreases upon withdrawal of the medical implement, such that a positive flow from the valve toward the catheter tip is effected upon withdrawal of the medical implement, thereby preventing a flow of blood from a patient into the catheter when the medical implement is removed from the valve.

Une soupape à écoulement dirigé en système fermé, sans pointes, comprend un corps définissant une cavité intérieure. A l'extrémité proximale du corps se trouve une ouverture de préférence suffisamment grande pour recevoir un embout de normes ANSI d'un instrument médical. La soupape comprend un joint plastique en silicium élastique remplissant la cavité supérieure ainsi que l'ouverture avec une couronne de joints ovale présentant une fente. L'ouverture presse la couronne de joints ovale afin de maintenir de fente fermée, à l'état décomprimé. La fente s'ouvre lorsque le nez de l'instrument médical comprime le joint à l'intérieur de la cavité et la couronne du joint est dégagée de l'ouverture. Le logement présente également un espace de liquide facilitant l'écoulement d'un liquide entre l'instrument médical et un embout de cathéter. L'espace de liquide se trouvant dans la soupape augmente automatiquement et de manière réversible lors de l'insertion de l'instrument médical dans la cavité, et il décroît lorsque l'on retire l'instrument médical, de manière à créer un écoulement dirigé de la soupape vers l'embout du cathéter lors du retrait de l'instrument médical, empêchant ainsi un écoulement du sang du patient jusque dans le cathéter lorsque l'on retire l'instrument médical de la soupape.

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