| 摘要 |
A blood collection device for use with vacuum sample tube is provided having a retractable carrier for a double cannula. A sliding tab is mounted to the carrier by an outwardly biased flexible member and extends through a longitudinal slot in the barrel. Near either end of the slot V notches are provided in the internal wall of the barrel to engage locking hubs on the sliding tab to releasably lock the carrier in either the exposed or retracted position. A first cap is provided to cover the original open end and a second cap is provided to cover the end left open after retraction of the double cannula into the barrel.
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