For hypoxemic respiratory failure, which initial management step is commonly employed?

• A. Supplemental oxygen
• B. Broad-spectrum antibiotics
• C. Anticoagulation
• D. Systemic steroids

Answer: (A)

Supplying supplemental oxygen is the initial management for hypoxemic respiratory failure because the immediate problem is insufficient arterial oxygen content. Increasing the inspired oxygen fraction raises PaO2 and SaO2, improving tissue oxygen delivery while you identify and treat the underlying cause (pneumonia, pulmonary edema, ARDS, PE, etc.). Start with supplemental oxygen and adjust to achieve a target oxygenation (often SpO2 around 92–96%; 88–92% if COPD with CO2 retention risk). If oxygen alone doesn’t correct hypoxemia or the patient deteriorates, escalate to noninvasive ventilation or intubation with mechanical ventilation. Other steps like antibiotics, anticoagulation, or steroids may be necessary in specific situations but are not universal initial treatments for all cases of hypoxemic respiratory failure.