NEEDLE ASSEMBLY

摘要

A shieldable winged needle assembly includes a hub and a cannula projecti ng distally beyond the hub. A spring is telescoped over the cannula and engages with or into distal portions of the hub. A hub guide projects radially out from the hub. A first wing includes a center sleeve rotationally mounted on the hub and axially movable along the hub whe n a slot formed in the center sleeve aligns with the hub guide. A second wing has proximal and dist al sleeves mounted at opposite ends of the center sleeve. The proximal and distal sleeves each are rotationally mounted relative to the hub and each include slots that enable sliding movement of t he hub guide when the slots of the second wing align with the slot of the first wing. The spring propels the cannula and hub into a shielding position when the slots of the wings are rotated into alignment with one another.