Acute Adrenal Insufficiency Management

Introduction to Adrenal Insufficiency

The American College of Endocrinology suggests that patients with acute adrenal crisis typically fall into two categories: those with known adrenal insufficiency who experience a precipitating event, or those presenting de novo with undiagnosed disease 1, 2

The incidence of adrenal crisis is 6-8 episodes per 100 patient-years in known primary adrenal insufficiency patients, according to the Endocrine Society 1
Primary adrenal insufficiency (Addison's disease) is most commonly caused by autoimmune adrenalitis (~85% in Western populations), affecting adults of any age, as stated by the European Society of Endocrinology 3

Severe hypotension (often <90/60 mmHg) and tachycardia are common presentations of adrenal crisis, as noted by the American Heart Association 2, 3
The Endocrine Society recommends considering adrenal crisis in any patient with unexplained collapse, hypotension, vomiting, or diarrhea, especially with electrolyte abnormalities 3

Serum cortisol levels <10 mcg/dL or <250 nmol/L suggest adrenal insufficiency, according to the American Association of Clinical Endocrinologists 3
Plasma ACTH levels are markedly elevated in primary adrenal insufficiency, as stated by the European Society of Endocrinology 1, 3, 4

The American College of Emergency Physicians recommends administering hydrocortisone 100 mg IV bolus immediately upon clinical suspicion of adrenal crisis, which is the single most important intervention and must not be delayed 1, 2, 3, 4
Aggressive fluid resuscitation with 0.9% isotonic saline 1 liter IV over the first hour is crucial, as suggested by the Society of Critical Care Medicine 1, 2, 3, 4

Continued hydrocortisone therapy at a dose of 100-300 mg/day, either as continuous IV infusion or as divided IV/IM boluses, is recommended by the Endocrine Society 1, 2, 3, 4
The American Heart Association suggests monitoring serum electrolytes frequently to guide fluid management 1, 2, 3, 4

Patient education on emergency supplies, including injectable hydrocortisone, and medical alert jewelry is essential, as emphasized by the American Association of Clinical Endocrinologists 2, 3, 4
The European Society of Endocrinology recommends scheduling regular follow-up at least annually to assess health, weight, blood pressure, and electrolytes 3, 4

Testing for 21-hydroxylase autoantibodies (21OH-Ab) is positive in ~85% of autoimmune Addison's disease, as noted by the European Society of Endocrinology 3
A CT scan of the adrenals may be necessary to evaluate for hemorrhage, tumor, tuberculosis, or infiltrative processes if 21OH-Ab is negative, as suggested by the Radiological Society of North America 3

The Society of Critical Care Medicine emphasizes that fluid resuscitation must occur simultaneously with hydrocortisone administration, as both are essential for reversing shock, with at least 1 liter of 0.9% isotonic saline administered within the first hour 5
Check serum sodium, potassium, and glucose every 4-6 hours initially, as hypernatremia may develop with prolonged high-dose hydrocortisone therapy beyond 48-72 hours, and consider switching to methylprednisolone sodium succinate if hypernatremia occurs 5
Avoid abrupt cessation of high-dose therapy; always taper gradually to prevent rebound crisis, according to the guidelines from the Critical Care Medicine journal 5