| 摘要 |
This invention related to blood collecting devices that collect blood from a patient using a single needle insertion. Each blood collecting device typically includes a housing, which is removably attached to a test tube or blood reservoir. A blood flow tube is disposed in fluid communication with the housing for distributing blood from a patient into the test tube or blood reservoir. The blood is distributed through a membrane cavity having a liquid impervious and air-permeable membrane. At least one air opening is provided in the housing at the membrane cavity. Accordingly, air in the test tube or blood reservoir is displaced by the incoming blood through the membrane cavity and membrane and out the air opening(s). Vacuum pressure in the test tube or blood reservoir is dispelled by the flow of air. |
