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Difficulty: MediumSomatic Symptom and Eating Disorders

Paramedics bring a 21-year-old university student to the emergency department following a syncopal episode during a ballet class. Her dance instructor notes she has appeared increasingly emaciated over the past six months and frequently complains of being cold. Upon arrival, the patient expresses intense fear of gaining weight despite her visible cachexia. Vital signs show a temperature of 35.6°C (96.1°F), blood pressure of 82/50 mm Hg, heart rate of 38/min, and respiratory rate of 12/min. Her body mass index is calculated at 12.8 kg/m2. Physical assessment reveals lanugo over her back and acrocyanosis. A 12-lead electrocardiogram demonstrates marked sinus bradycardia with a prolonged QTc interval. Laboratory evaluation highlights a serum potassium of 2.9 mEq/L and a serum phosphorus of 2.2 mg/dL. Arrange the following clinical management steps in the most appropriate chronological order from initial acute presentation to long-term maintenance.

  1. 1Admit to an inpatient medical unit with continuous cardiac monitoring
  2. 2Initiate a low-calorie refeeding protocol with concurrent electrolyte repletion
  3. 3Transition to a specialized residential eating disorder program for supervised weight restoration
  4. 4Engage in long-term outpatient cognitive-behavioral therapy

Answer

The correct sequence is: 1. Admit to an inpatient medical unit, 2. Initiate a low-calorie refeeding protocol, 3. Transition to a residential eating disorder program, 4. Engage in long-term outpatient cognitive-behavioral therapy.
The correct chronological management of a patient with life-threatening anorexia nervosa follows a strict hierarchy of needs, beginning with immediate medical stabilization. Patients presenting with extreme bradycardia, QTc prolongation, hemodynamic instability, or a body mass index less than 15 kg/m2 require admission to an inpatient medical unit equipped with continuous cardiac telemetry to prevent and treat fatal arrhythmias. Once the patient is admitted, the next clinical step is careful nutritional rehabilitation; calories must be introduced slowly (e.g., 10-20 kcal/kg/day) while aggressively replacing potassium and phosphorus to avoid refeeding syndrome. After the patient becomes medically stable and baseline electrolytes are normalized, they must transition to a specialized residential or partial hospitalization program designed for supervised psychiatric weight restoration. Finally, once a safe baseline weight is achieved and starvation-induced cognitive deficits improve, long-term outpatient cognitive-behavioral therapy is initiated to address underlying cognitive distortions and prevent relapse.

Step-by-Step Solution

1
Assess the patient's medical stability and determine the appropriate initial triage level.
The patient is medically unstable due to hypotension, extreme bradycardia, QTc prolongation, and severe malnutrition, requiring inpatient medical admission.
Medical emergencies take precedence over psychiatric treatment; mortality in severe anorexia nervosa is most often due to sudden cardiac arrhythmias.
2
Formulate a plan for nutritional rehabilitation in a severely malnourished patient.
Implement a slow, cautious refeeding protocol while replacing depleted intracellular electrolytes, specifically potassium and phosphorus.
Rapid refeeding triggers insulin release, driving phosphorus and potassium into cells, which can precipitate fatal cardiovascular collapse and respiratory failure (refeeding syndrome).
3
Determine the next level of care once acute medical parameters (vital signs, electrocardiogram, electrolytes) have stabilized.
Transfer the patient to a specialized residential eating disorder program.
Continued weight restoration requires intense behavioral supervision (e.g., monitoring meals, preventing purging or excessive exercise) in a structured psychiatric setting.
4
Plan for long-term psychological maintenance and relapse prevention.
Initiate outpatient cognitive-behavioral therapy for eating disorders.
Cognitive restructuring of body image distortions is crucial for long-term recovery but is largely ineffective until a patient is renourished enough to engage in complex cognitive tasks.

Key Concept

In life-threatening anorexia nervosa, the sequence of multidisciplinary care strictly prioritizes acute medical stabilization and safe refeeding before transitioning to psychiatric weight restoration and long-term psychotherapy.
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Topics

Somatic Symptom and Eating Disorders

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