Which formula is used to correct a WBC count for the presence of nucleated RBCs?

The formula used to correct a white blood cell (WBC) count for the presence of nucleated red blood cells (nRBCs) is indeed (WBC X 100)/(nRBC + 100). This calculation is necessary because the presence of nRBCs can artificially elevate the WBC count, leading to inaccurate assessments of the patient's leukocyte status.

In the formula, multiplying the WBC count by 100 provides a scaling factor that accommodates the influence of the nRBCs. The denominator, which adds the nRBC count to 100, functions to adjust the total cell count and reflects the proportion of the nucleated red blood cells in the overall white blood cell population. By using this correction, healthcare professionals can more accurately evaluate the WBC concentration and gain better insight into the patient’s hematological condition, ensuring that any clinical decisions made are based on precise data.

The other formulas do not appropriately account for the presence of nRBCs in this context and would not yield an accurate correction of the WBC count.