Determine Rh type for transfusion candidates. Rh typing of expectant mothers may indicate potential for Rh hemolytic disease of the fetus/newborn. This typing is also used to determine Rh immune globulin candidacy for prenatal and postpartum patients.
Lavender-top (EDTA) tube
Specimens should be tested as soon as possible. Samples that cannot be tested immediately should be stored at 2°C to 8°C. Do not freeze red cells.
Gross hemolysis; bacterial or other contamination