Estimated WBC count is calculated by?

Estimated WBC count is calculated by?

• A. Multiply the average of 10 fields by 2,000.
• B. Multiply the sum of the 10 fields by 2,000.
• C. Multiply the average of 10 fields by 20,000.
• D. Divide the average by 2,000.

Answer: (A)

Estimating WBCs with a hemocytometer is all about converting a microscopic count into a concentration. You dilute the blood, count the white cells in a defined number of fields (in this approach, 10 fields), compute the average number of WBCs per field, and then apply a standard conversion factor to turn that average into cells per microliter of blood. The factor 2,000 is used because it accounts for the known volume represented by each field and the dilution used, giving a reliable estimate of WBCs per microliter. So, taking the average number of cells per field and multiplying by 2,000 converts that field-based count into a concentration.

Estimating WBCs with a hemocytometer is all about converting a microscopic count into a concentration. You dilute the blood, count the white cells in a defined number of fields (in this approach, 10 fields), compute the average number of WBCs per field, and then apply a standard conversion factor to turn that average into cells per microliter of blood. The factor 2,000 is used because it accounts for the known volume represented by each field and the dilution used, giving a reliable estimate of WBCs per microliter. So, taking the average number of cells per field and multiplying by 2,000 converts that field-based count into a concentration.