Blood Smear Review
Centralized Core Laboratory:Hematology
Purple top (EDTA) tube: Whole Blood
2.0 mL (minimum 0.3 mL) and 2 fresh peripheral blood smears
Cause for rejection:
Specimens which are hemolyzed, clotted, diluted with IV fluid, or collected in heparin.
Daily, 24 hours
Microscopic evaluation of Wright's stained blood film
A differential from whole blood cannot be done on a specimen held more than 4 hours at room temperature or more than 8 hours refrigerated. On microsamples, the specimen cannot be used when it is more than 4 hours old.
Reference range is available on patient report
Differential; Peripheral smear; WBC morphology