ACTH, morning — lab reference
In the reference guideCollect 7-10 AM with proper chilled handling. Interpret with concurrent cortisol.
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What’s searchable?Collect 7-10 AM with proper chilled handling. Interpret with concurrent cortisol.
Collect at a defined time. Assay-specific; dynamic testing may be required.
Morning fasting collection is preferred when practical. Day-to-day variation is substantial.
Morning collection preferred for men. Method and age matter; confirm unexpected low values.
Female follicular <80; luteal <285; postmeno <51. Morning timing and stimulation testing may be needed.
Lab-specific. Interpret with symptoms, medication effects, and differential.
Altitude, smoking, hydration, androgen therapy, and pregnancy may shift values.
Consider altitude and iron/B12/folate status. Pregnancy requires trimester-specific ranges.
Hydration and altitude are major modifiers. Review alongside hemoglobin and RBC indices.
Macrocytosis and microcytosis require cause-specific interpretation.
Analyzer-specific. Review with MCV and MCHC.
Analyzer-specific; hemolysis and cold agglutinins may interfere.
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