What does "without stasis" mean in phlebotomy?

In phlebotomy, "without stasis" means that the blood flow is not restricted or that venous pooling is not occurring. This specifically refers to the absence of a tourniquet during blood collection. When a tourniquet is applied, it creates pressure that temporarily obstructs blood flow in the veins, causing blood to pool in the area. This pooling can make veins easier to see and access, but it can also alter the composition of the blood sample by causing hemoconcentration or affecting the levels of certain analytes.

By collecting the blood "without stasis," the phlebotomist allows for a more natural blood flow, leading to a more accurate representation of the patient's circulating blood. This method can help ensure that the blood sample is not compromised by any changes induced by the application of a tourniquet.