Which description best defines respiratory distress?

• A. Increased work of breathing with adequate gas exchange.
• B. Not breathing spontaneously.
• C. Inadequate gas exchange.
• D. Hypoxia and carbon dioxide retention.

Answer: (A)

Respiratory distress means the person is working hard to breathe, showing signs like rapid breathing, nasal flaring, chest retractions, or use of accessory muscles, but their gas exchange is still adequate. In other words, oxygen levels are acceptable and carbon dioxide isn’t piling up yet. This distinguishes distress from respiratory failure, where gas exchange becomes inadequate and you see hypoxemia or hypercapnia.

Not breathing spontaneously points to apnea or respiratory arrest, not distress, while “inadequate gas exchange” describes failure of the lungs to exchange gases, which is a more severe state than distress. Signs of hypoxia and carbon dioxide retention indicate that gas exchange has already deteriorated, which again moves past distress into failure.