A well-mixed specimen for a complete blood count has a brown color. The patient is being treated...

Question:

A well-mixed specimen for a complete blood count has a brown color. The patient is being treated with a sulfonamide for a bladder infection. Which of the following could explain the brown color?

a. The patient has Hb M.

b. Double heterozygosity for Hb S and thalassemia.

c. The incorrect anticoagulant was used.

d. High levels of Hb F.

Complete Blood Count Specimen:

A routine complete blood count specimen is venous blood collected in a lavandar-top evacuated tube, which contains the anticoagulant EDTA. Blood should not be centrifuged. Refrigerated or room temperature blood is acceptable. Clotted, frozen, under- or overfilled tubes, tubes exhibiting hemolysis should be rejected.

Answer and Explanation: 1

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Hemoglobin M (HbM) is an abnormal hemoglobin variant that results in methemoglobinemia. Methemoglobin is hemoglobin in which...

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Blood Count Test Terminology

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Chapter 30 / Lesson 6
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The contents of blood are studied through phlebotomy to understand the levels of different cells that indicate clinical health. Explore the details of blood testing and blood counts by studying the terminology used in phlebotomy.


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