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Description

An estimate of the white blood cell count can be made from the peripheral blood smear. This can be used to confirm an electronic count, or to get a rough estimate if no electronic count is available.


average WBCs per high power field (using 40x objective)

estimated WBC per microliter

< 2

< 4,000

2 - 3

4,000 - 7,000

4 - 6

7,000 - 10,000

7 - 10

10,000 - 13,000

11 - 20

13,000 - 18,000

> 20

> 18,000

 


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