A humidifier malfunction on a ventilator is classified as which level of event?

• A. Level Two
• B. Level One
• C. Level Three
• D. Level Four

Answer: (A)

Understanding how events are graded helps you connect device problems to patient safety outcomes. These levels range from events with no harm and no extra care needed to events that cause temporary or permanent harm.

A humidifier malfunction on a ventilator is classified as Level Two because it is a device issue that, if identified and addressed promptly, does not cause actual patient harm. It requires clinician action—troubleshooting the circuit, possibly replacing the humidifier, and increased monitoring to ensure the patient remains stable. This goes beyond a scenario where no intervention is needed (Level One) but does not involve harm or the need for corrective care to reverse harm (Levels Three or Four). So the necessary vigilance and corrective steps, without resulting patient harm, place it at Level Two.