The reason for the high-voltage alarm of the medical equipment does not include that the patient is calm and his condition is stable.
Airway pressure sensing should be an important sensor on the ventilator, which can monitor pressure changes in the airway and feed it back to the ventilator control system. If this sensor fails or is damaged, the ventilator will not be able to correctly detect pressure changes in the airway, which will trigger a high-pressure alarm.