| 摘要 |
A device is provided to protect the hypodermic needlepoint of a syringe f rom being dulled as it penetrates through the stopple of a fluid vial for th e purpose of filling the syringe with fluid from the vial. Specifically, the device includes a blunt needle that covers the hypodermic needle and that i nteracts with the syringe to establish relative friction forces between them . Importantly, this friction force is less than the friction force subsequen tly established between the dull needle and the stopple. Thus, after the hyp odermic syringe has been filled, and is withdrawn from the fluid vial, the s tronger friction force between the stopple and the dull needle causes the du ll needle to remain with the stopple as the hypodermic syringe is removed fr om the fluid vial. |
