| 摘要 |
In a safety syringe in which a needle and needle holder can be withdrawn into a barrel after use, the needle holder is provided with an insert having forwardly and inwardly extending resilient fingers that are cammed outward by an enlarged head formed on a projection of the plunger of the syringe, and engage a proximally facing surface on the head to connect the needle holder positively to the plunger so that the needle holder can be withdrawn into the barrel of the syringe.
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