| 摘要 |
Apparatus, for evacuating blood sample tubes (5), comprises a casing (2) containing a vacuum pump (13) which is connected by a tube (12) to a needle (10). <??>Apparatus, for evacuating blood sample tubes (5), comprises a casing (2) containing a vacuum pump (13) which is connected by a tube (12) to a needle (10). <??>The tube is inserted into a recess in the apparatus and pushed upwards against the effect of a biasing spring (F) until the needle penetrates its sealing membrane (11) and it can be evacuated. At the end of evacuation the spring returns the tube to the starting position. |
