If the WBC count is 10.5 and there are 5 nRBCs observed in the differential, what is the corrected WBC count?

If the WBC count is 10.5 and there are 5 nRBCs observed in the differential, what is the corrected WBC count?

• A. 10.0
• B. 10.5
• C. 9.5
• D. 11.0

Answer: (A)

To calculate the corrected white blood cell (WBC) count when nucleated red blood cells (nRBCs) are present, it is essential to use a formula that adjusts the total WBC count based on the number of nRBCs observed. The corrected WBC count helps provide a more accurate representation of the actual white blood cells, excluding the interference caused by nRBCs. The formula used for this correction is: \[ \text{Corrected WBC Count} = \text{WBC Count} \times \frac{100}{(100 + \text{nRBC Count})} \] Using the provided values: 1. Start with the original WBC count of 10.5. 2. There are 5 nRBCs observed in the differential. Plugging these numbers into the formula gives: \[ \text{Corrected WBC Count} = 10.5 \times \frac{100}{(100 + 5)} = 10.5 \times \frac{100}{105} \] Calculating this provides: \[ \text{Corrected WBC Count} = 10.5 \times 0.9524 \approx 10.0 \]

To calculate the corrected white blood cell (WBC) count when nucleated red blood cells (nRBCs) are present, it is essential to use a formula that adjusts the total WBC count based on the number of nRBCs observed. The corrected WBC count helps provide a more accurate representation of the actual white blood cells, excluding the interference caused by nRBCs.

The formula used for this correction is:

[ \text{Corrected WBC Count} = \text{WBC Count} \times \frac{100}{(100 + \text{nRBC Count})} ]

Using the provided values:

1. Start with the original WBC count of 10.5.

2. There are 5 nRBCs observed in the differential.

Plugging these numbers into the formula gives:

[ \text{Corrected WBC Count} = 10.5 \times \frac{100}{(100 + 5)} = 10.5 \times \frac{100}{105} ]

Calculating this provides:

[ \text{Corrected WBC Count} = 10.5 \times 0.9524 \approx 10.0 ]