| 摘要 |
A safety vacuum syringe for blood sampling, which includes a barrel (1), a cylindrical vacuum container (2) mounted inside the barrel, a hollow inner cap (3) mounted in the barrel at the front end, a hollow cylindrical connecting member (25) fixedly secured to the front end of the cylindrical vacuum container, a needle holder (6) having an outer needle cannula (65) and an inner needle cannula (66) at two opposite ends, an outer needle cap (5) covered on the outer needle cannula, and an outer bottom cap (7) fastened to the barrel to hold the vacuum container on the inside. When the vacuum container (2) is pulled out of the barrel (1) and detached from it, the connecting member (25) and the needle holder (6) are pulled to the inside of the barrel, the outer needle cap (5) and the outer bottom cap (7) are respectively and invertedly inserted into the two opposite ends of the barrel to deform the needle cannulas of the needle holder. <IMAGE> |
