A patient is having difficulty breathing but has an adequate tidal volume and respiratory rate. What is the most likely condition?

• A. Respiratory arrest
• B. Insulin shock
• C. Respiratory failure
• D. Respiratory distress

Answer: (D)

When a patient is having trouble breathing but still has a normal or adequate tidal volume and respiratory rate, the issue is increased work of breathing with preserved ventilation. This is respiratory distress: the patient is struggling to breathe and may show signs like use of accessory muscles, nasal flaring, or an anxious, labored appearance, but air is still moving in and out. In respiratory failure, ventilation or oxygenation becomes inadequate, often evident as shallow, ineffective breaths, fatigue, altered mental status, or cyanosis. Respiratory arrest means breathing has stopped altogether. Insulin shock is a hypoglycemic emergency and isn’t defined primarily by breathing difficulty.