A prepackaged safety needle device has fitted to a holder (2) a double-ended needle assembly (18) and a needle protection housing (12) pivotally connected to the neck of the housing. The hub (24) of the double-ended needle is mated to the neck (8) of the holder. A circumferential sleeve (14) extending from the neck (8) of the holder (2) envelops the hub (24) so that when the needle that extends away from the holder (2) is capped by a sheath (28), the lower portions of the sheath (28) would coact with the sleeve (14) to form a relatively tight fit. The configurations of the sleeve (14) and the sheath (28) with respect to the needle hub (24), at their respective interacting portions are such that a tortuous path (30) is established which allows sterilizing gas to pass into the space (34) capped by the sheath (28), but yet prevents bacteria or other contaminants from intruding into the space. The opening at the end of the holder (2) away from the needle assembly is sealed by a porous cover (16) that allows sterilizing gas to pass into the interior of the holder (2) while acting as a barrier to prevent bacteria from entering into the holder (2). Thus, configured, the prepackaged device is a conveninent to use device that remains sterile until use.La présente invention concerne un dispositif de sécurité pour aiguille préemballé qui possède, adapté à un support, un ensemble aiguille à deux extrémités et un boîtier de protection daiguille connecté pivotant au col de ce logement. Lembout de laiguille à deux extrémité est connecté au col du support. Un manchon périphérique partant du col du porteur enveloppe lembout de sorte que lorsque laiguille qui se prolonge hors du support est recouverte par une enveloppe, les parties inférieures de cette enveloppe puissent coagir avec ce manchon de façon à former un ajustement relativement étanche. Les agencements de ce manchon et de lenveloppe par rapport à lembout de laiguille, au niveau des parties respectives dinteraction, sont tel
