OSMT (Ontario Society of Medical Technologists) Practice Exam

Question: 1 / 400

Which tube should be drawn for a red cell folate test?

EDTA tube

For a red cell folate test, the correct tube to use is the serum tube. This type of tube is specifically designed to allow for the separation of serum from the blood sample after centrifugation, which is essential for accurately measuring the folate levels within red blood cells.

Red cell folate testing requires the analysis of folate concentration directly within the red blood cells, as the red cell folate level reflects long-term folate status better than serum folate, which can fluctuate based on dietary intake. The use of a serum tube ensures that the sample is processed correctly, allowing for reliable test results.

Inappropriate options include tubes containing anticoagulants like EDTA, heparin, or those designed for serum separator tests, which do not serve the purpose of isolating the red blood cell content needed for this specific assay.

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Serum tube

Heparin tube

SST tube

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