Cortisol, serum, morning — lab reference
Some search terms matchedCollect at a defined time. Assay-specific; dynamic testing may be required.
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What’s searchable?Collect at a defined time. Assay-specific; dynamic testing may be required.
Time-specific and assay-specific.
Collect 7-10 AM with proper chilled handling. Interpret with concurrent cortisol.
Age, sex, nutrition, liver disease, diabetes, and assay matter.
Pulsatile secretion makes random GH difficult to interpret; stimulation/suppression testing may be needed.
Interpret with calcium, phosphorus, magnesium, vitamin D, and kidney function.
Sodium intake, posture, potassium, time, medications, and renin method are essential.
Direct renin and plasma renin activity are not interchangeable.
Screening cutoff depends on units, method, medications, potassium, and collection protocol.
Supine collection and stress control improve specificity; use exact lab cutoffs.
Specify whole blood, RBC, plasma, or intracellular method. Preanalytic handling is critical.
Specify method and stabilization protocol.
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