Résumé
Introduction@#The complete blood count (CBC) is a frequently performed laboratory test today. This study evaluated the effects of temperature and sample storage time on parameters of CBC which could produce misleading results of clinical significance. @*Methods@#In a cross-sectional study, CBC was checked in 20 randomly selected out-patients and baseline measurements were analyzed using the XN-2000 (Sysmex, Kobe, Japan) fully automated hematology analyzer. CBC was done all samples of storage at room temperature. Values were checked at time intervals of 0, 6, and 24 hr.@*Results@#Among CBC parameters, white blood cell, red blood cell, hemoglobin, mean cell hemoglobin (MCH), neutrophils and lymphocytes were stable at time up to 6 h. Hematocrit increased between 0 and 24 hours, averaging 41.5% and 45.2%, respectively. MCV, RDW-SD, and RDW-CV increased between 0 and 24 hours. The mean value was statistically significant. There were 85.6fL/ 93.4fL (p<0.001), 40.7fL /48.2fL (p<0.001), 13.1% and 14.2% (p<0.05), respectively. </br> However, the MCHC was affected by time differences. (p <0.001 at 0 and 24 hours, p <0.001 at 3 and 24 hours). Platelet PDW, MPV, and P-LCR values increased between 0 and 24 h, respectively.@*Conclusion@#Whole blood samples were stored at room temperature for 24 hours for CBC tests, there were statistically significant differences in the size of red blood cells and platelets.