| 摘要 |
2067352 9104761 PCTABS00003 Shielded winged needled medical devices (210, 212) which minimize accidental needlesticks of the skin by an exposed contaminated needle are provided. The medical devices (210, 212) include a hollow inner tube body (210) having a pair of circumferential grooves (236, 238) on the outside thereof, and a slightly larger hollow outer winged shield (212) which is slidable relative to the inner tube. The inner tube (210) has a shoulder (262) of relatively large diameter forwardly adjacent the front groove (236), and a ramp (254) of diameter smaller than the shoulder (267) rearwardly adjacent the front groove (236). The outer shield (212) has an inner surface with first and second ramps (285, 292) and a protrusion (234) which terminates the second ramp. The provided ramps (285, 292) and protrusion (234) on inner surface of the outer shield (212), and the ramp (252), groove (236), and shoulder (212) on the outer surface of the inner shield (210) provide an absolute lock which may not be overcome by manual force.
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