Which specimen collection condition is most important when measuring cortisol?

Question

Accepted Answer

보기 3: The time of collection must be recorded because of diurnal variation

Cortisol concentrations vary widely with the time of day, so a result cannot be interpreted unless the time of collection is recorded. Fasting and protection from light are collection requirements for other analytes.

Answer

보기 1: The specimen must be collected while the patient is fasting overnight

Answer

보기 2: The specimen must be protected from light during transport

Answer

보기 4: The specimen must be collected in a sodium citrate tube

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Which specimen collection condition is most important when measuring cortisol?

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