Values of hematological parameters of bovine blood samples analyzed at different time intervals

Changes in the values of biochemical and cellular blood constituents can indicate the presence of early pathology. The accuracy of a laboratory test depends, among other factors, on the quality of the sample provided for analysis. The aim of this study was to verify the feasibility of collected blood samples from cattle analyzed at different time intervals and report the variations observed at the values of haematological parameters. Ten whole blood samples of crossbred cattle, refrigerated (0-2 degrees C), to achieve four blood counts in each sample unit, in different time 2, 26, 52 and 74 hours after collection were used. There have been changes in the values of VG from 26h, the total count of erythrocytes was the parameter that most ranged between the different times evaluated. Hemoglobin was increased in most samples in the analysis after 2h, probably due to the occurrence of hemolysis. Also there was an increase in the values of MCV in different time intervals. The results of the values of TPP also demonstrated abnormal in 26h after collection. However, the fibrinogen was the parameter that remained with more stable values in the different times evaluated. Only in periods of 52h and 74h morphological changes were visualized in leukocytes. It was concluded that there was wide variation in the values of the parameters evaluated between periods of 2h and 26h, if samples are preserved properly can be examined within 24h.