HCT stands for which of the following?

• A. Hematocrit (% of RBC volume)
• B. Hemoglobin concentration
• C. Hematology test
• D. Hematocrit study

Answer: (A)

The meaning being tested is what HCT measures: the hematocrit, which is the percentage of blood volume made up by red blood cells. It’s obtained by measuring how much of a blood sample’s volume is RBCs, usually by centrifuging the sample or using an automated analyzer, and then expressing that as a percentage. This value helps assess conditions like anemia (low hematocrit) or dehydration/polycythemia (high hematocrit).

It’s not the same as hemoglobin concentration, which is the amount of hemoglobin per volume of blood (reported in g/dL). It’s not a vague “hematology test,” but a specific component of a complete blood count. And “hematocrit study” isn’t standard terminology for this measurement.