What color tube is typically used to collect samples for an antibody screen?

The dark lavender tube is typically used for collecting samples for an antibody screen, primarily because it contains EDTA, an anticoagulant that helps preserve the cellular components of the blood. This preservation is critical for accurate antibody testing, as it prevents clot formation and keeps the blood sample in a state that allows for the detection of antibodies on the surface of red blood cells.

The dark lavender tube is preferred in immunohematology and compatibility testing because it supports the integrity of the sample for serological analysis. This testing often requires accurate identification of any antibodies present against red blood cells, which can be crucial for ensuring patient safety during transfusions.