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Difficulty: MediumSomatic Symptom and Eating Disorders

A high school student is transported to the acute care clinic by her family following a fainting spell. She reports eating less than 500 calories daily for several months. Her current body mass index is 13.8 kg/m213.8 \text{ kg/m}^2. Triage vitals reveal marked hypotension (80/50 mm Hg80/50 \text{ mm Hg}), profound sinus bradycardia (36/min36/\text{min}), and hypothermia (35.4∘C35.4^\circ\text{C}). Examination shows marked cachexia, temporal wasting, and lanugo. Arrange the following steps in the most appropriate chronological sequence for the comprehensive management of this patient.

  1. 1Perform an initial electrocardiogram and obtain baseline serum electrolytes, phosphorus, and magnesium.
  2. 2Admit to an inpatient medical unit for continuous telemetry and correction of existing electrolyte derangements.
  3. 3Initiate conservative caloric reintroduction while closely monitoring for signs of refeeding syndrome.
  4. 4Transition to a specialized residential eating disorder program for long-term psychotherapy.

Answer

The correct sequence is: 1) Perform initial EKG and baseline labs, 2) Admit to an inpatient medical unit, 3) Initiate conservative caloric reintroduction, 4) Transition to a residential eating disorder program.
The comprehensive management of severe anorexia nervosa follows a strict sequence prioritizing immediate life-saving medical stabilization before long-term psychiatric care. This patient presents in extremis with profound bradycardia, hypotension, and a BMI of 13.8. The immediate first step is an EKG and baseline labs to assess cardiac risk and electrolyte status. Because she exhibits marked vital sign instability, she must be admitted to a medical inpatient unit for continuous monitoring. Once admitted, conservative nutritional rehabilitation is initiated slowly to prevent refeeding syndrome. Finally, once medically stable, she can be safely transferred to a psychiatric facility for necessary psychotherapy.

Step-by-Step Solution

1
Identify the need for immediate emergency workup due to critical vital signs.
Order an EKG and baseline electrolytes.
Profound bradycardia and malnutrition carry a high risk of fatal arrhythmias and electrolyte derangements.
2
Determine the appropriate level of care based on the patient's instability.
Admit to a medical inpatient unit.
Patients with a heart rate below 40/min, severe hypotension, or BMI less than 15 require continuous telemetry and medical stabilization prior to psychiatric admission.
3
Plan the nutritional intervention safely.
Start cautious refeeding with daily lab monitoring.
Aggressive feeding can cause a sudden insulin spike, driving phosphorus, potassium, and magnesium intracellularly and triggering fatal refeeding syndrome.
4
Determine long-term management after the acute medical crisis resolves.
Transfer to a psychiatric or residential eating disorder facility.
Once the physical threat to life is resolved, the underlying psychiatric condition must be treated with specialized long-term psychotherapy.

Key Concept

Management sequence of severe anorexia nervosa: emergency medical workup, inpatient medical stabilization, cautious nutritional rehabilitation, followed by psychiatric transfer.
Estimated Time:1m 30s
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Topics

Somatic Symptom and Eating Disorders

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