| 摘要 |
<p>A device is provided to protect the hypodermic needlepoint of a syringe from being dulled as it penetrates through the stopple of a fluid vial for the purpose of filling the syringe with fluid from the vial. Specifically, the device includes a blunt needle that covers the hypodermic needle and that interacts with the syringe to establish relative friction forces between them. Importantly, this friction force is less than the friction force subsequently established between the dull needle and the stopple. Thus, after the hypodermic syringe has been filled, and is withdrawn from the fluid vial, the stronger friction force between the stopple and the dull needle causes the dull needle to remain with the stopple as the hypodermic syringe is removed from the fluid vial.</p> |
