| 摘要 |
A safety syringe for taking blood has a hollow barrel, a seal, a tube and a needle hub. The hollow barrel has an outside surface, a proximal open end and a distal closed end. The seal with an inner needle is mounted inside the hollow barrel. The tube has a proximal open end and a distal open end and is attached longitudinally to the outside surface of the hollow barrel. The needle hub is mounted inside the tube, and the needle can extend out of the distal open end of the tube. A first through hole defined in the hollow barrel and a second through hole is defined in the tube align with the first through hole. When taking blood, the needle is extended out from the distal end of the tube to take a blood sample and a vacutainer is inserted into the hollow barrel to collect a blood sample. The used needle is retracted into the tube after use to keep people from getting injured or infected.
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