Lab Notes - 4
When to correct WBC count for nRBCs:
If there are >4 (5 or more) nRBCs per 100 WBCs
How do you know when there are >4 nRBCs/100WBCs:
When the instrument flags nRBCs present or when the Tech does the WBC differential and sees >4 nRBCs when classifying 100 WBCs
How is WBC count corrected:
WBCcorrected = WBC count           x 100
                    100 + #nRBC 
Your corrected WBC in syllabus Unit Questions #12 should be 4,783/mm3
Effect of over filling pipette on WBC count:
Falsely elevate count