While awaiting a routine appointment in the outpatient pulmonary clinic, a 62-year-old man… — USMLE Step 3

While awaiting a routine appointment in the outpatient pulmonary clinic, a $62$ -year-old man suddenly begins coughing up large volumes of bright red blood. Within minutes, he expectorates more than $400\text{ mL}$ of blood into a basin. The patient becomes highly agitated, profoundly diaphoretic, and visibly struggles to breathe. His medical history is significant for pulmonary tuberculosis that was treated $15$ years ago. Clinic staff immediately transfer him to the adjacent emergency department resuscitation bay. Vital signs show a heart rate of $128/\text{min}$ , blood pressure of $115/75\text{ mmHg}$ , and a respiratory rate of $34/\text{min}$ . Pulse oximetry reveals an oxygen saturation of $83\%$ on room air. Chest auscultation demonstrates coarse gurgling and diminished breath sounds predominantly over the right lung fields.

Which of the following is the most appropriate immediate next step in the management of this patient?

Perform endotracheal intubationCevap
B
Obtain computed tomography angiography of the chest
C
Transfer the patient for bronchial artery embolization
D
Perform bedside flexible bronchoscopy
E
Administer intravenous tranexamic acid

Cevap

Perform endotracheal intubation

The patient is experiencing massive hemoptysis (defined as expectorating >100-600 mL of blood in 24 hours, or any amount causing hemodynamic or respiratory instability). He is presenting with acute respiratory failure, evidenced by profound hypoxemia, severe tachypnea, and respiratory distress. The most common immediate cause of death in massive hemoptysis is asphyxiation from blood flooding the airways, not exsanguination. Therefore, securing the airway via endotracheal intubation is the single most urgent initial stabilization step. Once the airway is protected, the patient should ideally be positioned with the bleeding lung dependent (in this case, right side down, based on auscultation) to prevent blood from spilling into the unaffected lung, followed by definitive diagnosis and treatment (e.g., bronchoscopy or bronchial artery embolization).

Adım Adım Çözüm

Recognize the clinical presentation of massive hemoptysis with impending respiratory failure.

The patient has expectorated >400 mL of blood rapidly and is showing severe hypoxemia (SpO2 83%), tachypnea, and respiratory distress.

Identifying the severity of the bleed and its immediate impact on respiratory mechanics dictates the triage priority.

Identify the primary pathophysiological threat to the patient's life in this specific scenario.

The immediate risk is asphyxiation (drowning in blood) due to airway flooding, rather than exsanguination.

The anatomic dead space of the major airways is roughly 150 mL; rapidly coughing up larger volumes easily overwhelms the airway.

Select the intervention that addresses the most immediate life-threatening problem.

Endotracheal intubation is selected as the first step.

Securing the airway guarantees ventilation, provides oxygenation, allows for suctioning, and facilitates subsequent procedures like bronchoscopy.

Anahtar Kavram

In the initial stabilization of massive hemoptysis, the primary life-threatening risk is asphyxiation, making airway protection via endotracheal intubation the absolute first priority before diagnostic imaging or source control.

Tahmini Süre:1m 30s

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Cevap

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