A ventilator pressure-relief valve stuck in the closed position can result in which complication?

A ventilator pressure-relief valve stuck in the closed position can result in which complication?

• A. Barotrauma
• B. Hypoventilation
• C. Hypoxia
• D. Hyperventilation

Answer: (A)

When the pressure-relief (pop-off) valve is stuck closed, the ventilator cannot vent excess airway pressure to the atmosphere. This lets peak inspiratory pressures climb, overdistending the delicate alveolar units. The resulting overinflation can tear alveolar walls and lead to barotrauma, with possible pneumothorax, pneumomediastinum, or subcutaneous emphysema. Hypoventilation or hyperventilation aren’t direct consequences of a stuck relief valve, since they reflect changes in ventilation rate or tidal volume rather than the circuit’s ability to vent pressure. Hypoxia can occur if barotrauma develops and impairs gas exchange, but the primary danger from a closed relief valve is barotrauma due to excessive airway pressures.

When the pressure-relief (pop-off) valve is stuck closed, the ventilator cannot vent excess airway pressure to the atmosphere. This lets peak inspiratory pressures climb, overdistending the delicate alveolar units. The resulting overinflation can tear alveolar walls and lead to barotrauma, with possible pneumothorax, pneumomediastinum, or subcutaneous emphysema.

Hypoventilation or hyperventilation aren’t direct consequences of a stuck relief valve, since they reflect changes in ventilation rate or tidal volume rather than the circuit’s ability to vent pressure. Hypoxia can occur if barotrauma develops and impairs gas exchange, but the primary danger from a closed relief valve is barotrauma due to excessive airway pressures.