Device body sliding safety for placing a cannula into a vein

摘要

Device for placement into a vein of a cannula composed of a short catheter (1) with proximal base (2), this device comprising a needle (3) having a puncture end (3a) and a cage (5) extending the base of the cannula proximally determining this cage chamber (13) traversed slidably by the needle from a proximal entrance (14) to a distal exit (16) and provided with a trap for retaining the camera end puncture of the needle when the needle is withdrawn from the catheter base, the cage being and provided base retaining means cooperating to ensure a temporary retention of the cage on the base before the puncture end of the needle is captured in the chamber of the cage, said retaining means an external flange (23) formed in the base and an outer lip (11) provided on the cage to be held by this rim comprising, being the peak formed in an organ Mobile (9, 10) comprising a wall (10) traversed by a hole (12) for passage of the needle so that the needle passage into the hole keeps the peak retention position, wherein said wall (10) is slidably mounted in the chamber of the cage in a direction transverse to the needle between a lowered retaining position and a high release position, so that when the needle is withdrawn into the cage to be removed with relative to said hole, the wall (10) which is not traversed by the needle can slide towards its high position, which raises said peak and for separating the cage from the catheter base, said flange (23) and / or said peak (11) a ramp (24) so ​​that a reversal of direction causes proximal cage lift peak when the needle (3) no longer passes through said hole (12).