Which Functional Assay Result Is Positive for HIT? (High Concentration

question 1

Multiple Choice

Which functional assay result is positive for HIT? (high concentration of heparin = 100 U/mL, low concentration = 0.1 U/mL)

• A) Platelet aggregation is absent in the saline control and with the high concentration of heparin, but does occur with the low concentration of heparin.
• B) Platelet aggregation occurs in the saline control and the high and the low concentrations of heparin.
• C) Platelet aggregation is absent in the saline control but does occur in the high and low concentrations of heparin.
• D) Platelet aggregation is absent in the saline control and the low concentration of heparin, but does occur in the high concentration of heparin.
• E) A and D

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