Emergency medical responders transport a 48-year-old male to the trauma bay after he was f… — USMLE Step 2 CK

Emergency medical responders transport a 48-year-old male to the trauma bay after he was found obtunded in his apartment. According to his live-in girlfriend, the patient has a history of treatment-resistant depression managed with phenelzine. She notes that over the past two days, he consumed multiple bottles of over-the-counter dextromethorphan for an upper respiratory infection. Vital signs upon arrival include a temperature of $39.9^\circ\text{C}$ ( $103.8^\circ\text{F}$ ), heart rate of $132/\text{min}$ , blood pressure of $170/105\text{ mm Hg}$ , and respiratory rate of $24/\text{min}$ . Physical examination is remarkable for profuse diaphoresis, hyperactive bowel sounds, and pronounced hyperreflexia with bilateral ankle clonus. The patient is stuporous and unable to communicate. A review of the electronic medical record reveals a legally executed advance directive designating the patient's sister as his sole healthcare proxy. Reached by telephone, the sister unequivocally requests that all life-sustaining and necessary medical treatments be provided. However, the girlfriend, who is present at the bedside, demands that no interventions be initiated, claiming the patient recently expressed a desire to 'die naturally without medical interference.' Which of the following is the most appropriate next step in the management of this patient?

A
Withhold pharmacological antidotes to honor the girlfriend's report of the patient's wishes.
B
Administer intravenous citalopram to acutely manage the underlying psychiatric decompensation.
Initiate cyproheptadine and supportive care in accordance with the sister's directive.Cevap
D
Provide the girlfriend with the full medical record to facilitate a consensus decision.
E
Diagnose brief psychotic disorder given the sudden behavioral change and administer haloperidol.

Cevap

Initiate cyproheptadine and supportive care in accordance with the sister's directive.

The correct answer accurately combines the medical management of serotonin syndrome with appropriate ethical decision-making. The patient's presentation of autonomic instability, altered mental status, and marked neuromuscular hyperactivity (hyperreflexia, clonus) in the setting of phenelzine and dextromethorphan ingestion is classic for serotonin syndrome. The primary treatment includes supportive care and the serotonin antagonist cyproheptadine. Ethically, because the patient lacks capacity, the physician must rely on the legally appointed healthcare proxy—in this case, the sister—whose decisions override the informal requests of the live-in girlfriend.

Adım Adım Çözüm

Diagnose the underlying acute medical emergency based on history and physical exam.

The combination of an MAOI (phenelzine), dextromethorphan, hyperthermia, autonomic instability, hyperactive bowel sounds, and hyperreflexia with clonus firmly points to Serotonin Syndrome.

Accurate identification of the toxidrome dictates the need for specific antidotal therapy (cyproheptadine) over contraindicated medications.

Assess the patient's decision-making capacity.

The patient is stuporous and unable to communicate, meaning he lacks the capacity to make his own medical decisions.

When a patient lacks capacity, a surrogate decision-maker must be identified to guide care.

Determine the legal surrogate decision-maker.

The electronic medical record explicitly names the sister as the designated healthcare proxy via a legally executed advance directive.

A legally designated proxy supersedes informal caregivers, partners, or next-of-kin who are not named in the directive.

Execute the management plan.

Proceed with the administration of cyproheptadine and aggressive supportive care (e.g., cooling, intravenous fluids, benzodiazepines) as authorized by the sister.

This aligns with both the correct medical protocol for serotonin syndrome and the legal/ethical framework of surrogate decision-making.

Anahtar Kavram

Management of Serotonin Syndrome and proper identification of the legal healthcare proxy in incapacitated patients.

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Cevap

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