| 摘要 |
A protective assembly is provided for adaptation to conventional hypodermic syringe devices or to be made as an integral part of such devices upon their manufacture. The protective assembly includes a sleeve member and collar member. The sleeve member is adapted to be arranged circumjacent the syringe barrel and the collar member is adapted to be affixed to the syringe barrel adjacent the needle. The sleeve member threadably communicates with the collar member when the sleeve member is moved axially between a first retracted position in which the needle is exposed toward a second extended position in which the needle is covered. A securing means is provided by which the sleeve member may be permanently secured in the extended position so as to prevent inadvertent sticks by the needle as well as the reuse of the contaminated needle.
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