Stand-Alone Low-Pressure (Disconnect) Alarms Can Be Fooled: Proper Setup Is Essential
Line-powered units should have a power-failure alarm.
Battery-powered units should have a low-battery indicator. Check that
all batteries are sufficiently charged.
To help prevent moisture entry into the alarm unit during operation,
place the unit approximately 30 cm above the pressure-sensing site and
watch for moisture buildup in the sensing line during ventilation.
Connect the pressure-sensing line at the patient circuit connection
to the artificial airway.
Use an alarm unit that allows selection of a pressure-alarm
point just below the peak inspiratory pressure (e.g., 5 to 10 cm H20).
With the alarm time delay set to zero, disconnect the patient
circuit at the artificial airway and confirm that an alarm occurs.
Never leave mechanically ventilated patients unattended in critical