If a patient has a total leukocyte count of 20.0× 10⁹/L with 70% neutrophils and 30% lymphocytes on the leukocyte differential smear,what is the absolute lymphocyte count?

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Quizplus · Accepted Answer

An absolute cell count by cell type is obtained by multiplying the relative number of WBCs (in decimal units)by the total white cell count per liter.For example,if a patient's WBC count is 7.5× 10⁹/L and 68% neutrophils are identified in the leukocyte differential,then the relative neutrophil count is 68%.The absolute neutrophil count is: 0.68× 7.5× 10⁹/L = 5.1× 10⁹ neutrophils/L.The absolute count should be reported to the nearest 0.1× 10⁹/L cells.Many laboratories report both the relative and absolute values for leukocyte differentials.

If a Patient Has a Total Leukocyte Count of 20