Blood smear evaluation is an important component of a complete blood count (CBC). Blood smear preparation and CBC data attainment are best performed on freshly collected potassium ethylene diamine tetra-acetic acid (K 3 -EDTA) anticoagulated whole blood samples. This is because delays may cause age-related deterioration and morphologic changes in erythrocytes, leukocytes, and platelets. [1][2][3][4][5][6] Cellular deterioration in aged samples negatively impacts hematologic parameters, including hematocrit, mean corpuscular