WBC Counting Facts - 2
If a patient’s uncorrected WBC count is 23.5 x 109/L and the #nRBCs per 100 WBCs was 20, What is the WBCcorrected :
WBCcorrected = patient’s WBC count   x 100
                         100 + #nRBCs per 100 WBC’s
WBCcorrected = 23.5 x 109/L       x 100
                              100 + 20
WBCcorrected = 19.6 x 109/L
The accuracy of manual WBC counts is:
+ or – 5.6%
To check on accuracy of manual WBC counts:
WBC estimate = (avg #/h.p.f)(2,000)