| 摘要 |
<p>A safety syringe for preventing "needle stick" injury and/or reuse of the syringe. The syringe comprises a body, a plunger mounted within the body, connection means for connecting the plunger to a needle holder adapted in use to carry a needle at the end of an injection stroke of the plunger whereby subsequent retraction of the plunger withdraws the needle into a shielded position within the body. The syringe includes a braking means disposed between the body and the plunger to retard but not stop the withdrawal of the plunger and needle after the injection stroke. The needle holder includes a radially extending flange which engages with a complementary rib or groove on the syringe until the needle holder is engaged by a protuberance on the plunger. Engagement of the protuberance with the needle holder serves to deform the needle holder and to draw the flange radially inwardly out of contact with the complimentary rib or groove on the syringe thereby allowing the needle holder and any needle attached to it to be drawn into the body of the syringe.</p> |
