Alarms
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6.5 Patient Disconnect Alarm
The Patient Disconnect alarm is activated if low inspiratory
pressure or the low exhaled tidal volume is detected during
two consecutive breaths. After alarm activation the unit
continues ventilation at the previously set parameters with the
following settings:
1. The flow trigger sensitivity
switches to OFF to eliminate
false triggering.
2. The ventilator stops oxygen
control and keeps the oxygen
blender in the position it was in
prior to alarm activation.
The ventilator automatically restores the previous settings
when one full breath is detected.
NOTE: During ventilation under high leak conditions
(e.g., non-inflated cuff of the endotracheal tube) a
Patient Disconnect alarm may be activated, if the
exhaled tidal volume criteria is not met. In this case,
ventilating the patient in Bi-Level mode (see Appendix
D) is recommended. To disable the Patient Disconnect
alarm, see section 5.2.3.4.
NOTE: An irregular ventilation condition such as
patient coughing may cause short periods of Patient
Disconnect alarm.
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