Butterfly needle with passive guard

A - Human Necessities – 61 – M

Patent

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Details

A61M 5/32 (2006.01)

Patent

CA 2525140

A butterfly needle device (10) having a passive needle protection system includes a needle (16) that has a proximal end, a distal tip and defines a needle axis. A cylindrical base member (26) having an axially aligned groove (44) is disposed over the needle (16) with a first wing (28) extending radially from the base member (26). A second wing (34) is provided for rotation about the needle axis relative to the first wing (28) between a closed configuration in which the wings are juxtaposed and an open configuration in which the wings are displaced from each other. A cylindrical needle guard (36) having a plug (42) is disposed over the needle (16). A spring (38) biases the needle guard (36) distally relative to the base member (26). A wing- activated mechanism is provided to align the plug (42) with the groove (44) after a closed-open-closed wing cycle allowing the needle guard (36) to distally advance to cover the needle tip at the end of the cycle.

Le dispositif d'aiguille à ailettes (10) de la présente invention, qui est pourvu d'un système passif de protection de l'aiguille, comporte une aiguille (16) définissant une extrémité proximale, une pointe distale, et un axe d'aiguille. Un élément de base cylindrique (26), portant une rainure axialement alignée (44), est disposé au-dessus de l'aiguille (16), une première ailette partant radialement de l'élément de base (26). Une seconde ailette (34) est agencée de façon à pouvoir tourner autour de l'axe de l'aiguille par rapport à la première ailette (28), entre une configuration fermée par laquelle les ailettes sont rabattues l'une contre l'autre, et une configuration ouverte par laquelle les ailettes se sont éloignées l'une de l'autre. Une garde d'aiguille cylindrique (36) portant une fiche (42) est disposée au-dessus de l'aiguille (16). Un ressort (38) tend à éloigner de l'élément de base (26) la garde d'aiguille. Un mécanisme mus par l'ailette vient aligner la fiche (42) sur la rainure après un cycle fermé-ouvert-fermé des ailettes, ce qui fait progresser la garde d'aiguille vers l'extrémité distale pour recouvrir la pointe d'aiguille à la fin du cycle.

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