Which ventilator event is considered potentially life-threatening or a level two event?

• A. Alarm Failure
• B. Circuit Disconnection
• C. Humidifier Malfunction
• D. Power Outage

Answer: (C)

Humidification is essential to conditioned inspired gas during ventilation. If the humidifier malfunctions, the patient may receive dry gas, which dries airway mucosa, thickens secretions, and impairs mucociliary clearance. This can lead to mucus plugging, atelectasis, and increased work of breathing, with the potential for rapid respiratory decline if not corrected. While other ventilator issues like alarm failure, circuit disconnection, or a power outage are serious and require prompt action, a humidifier problem uniquely threatens airway hydration and secretion management, making it a potentially life-threatening, level two event.