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CPE-008 · Testing

AI-05: ACTH-stimulation result

ACTH-stimulation result. Evaluates peak cortisol after 250 µg cosyntropin entered.

Active rulePriority 3Adrenal engine v1.0.0

Condition

  • peak cortisol after 250 µg cosyntropin entered

What it reports

  • Peak below 18 µg/dL (500 nmol/L): insufficient adrenal response
  • Peak 18 µg/dL or above: adequate response, though recent-onset secondary insufficiency can still pass

Diagnostic boundary

  • Assay cutoffs differ.

Evidence

  • EV-ES-PAI-2016Bornstein SR, Allolio B, Arlt W, et al. Diagnosis and Treatment of Primary Adrenal Insufficiency: An Endocrine Society Clinical Practice Guideline. J Clin Endocrinol Metab. 2016;101(2):364-389.Supports: Morning cortisol and ACTH as first tests; ACTH stimulation with 250 µg cosyntropin; peak cortisol below 18 µg/dL as insufficient Suspected adrenal crisis must be treated without waiting for tests

Cases where this rule fires

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