6 Alarms
169
THE SENSOR FAILURE ALARM
When the iVent
TM
201 detects a Sensor Disconnect alarm or Check Sensor
condition it enters Open Loop ventilation backup mode. During Open Loop,
ventilation is provided based on an average of the previous inhaled tidal volumes
(See Appendix E).
If the Sensor Disconnect alarm triggers the following message pop-up window
(Figure 149):
Figure 149: the Sensor Disconnect Pop-Up Window
Press the Clear button.
Check the connection of flow transducer tubing to the ventilator.
Then, check for excessive amounts of water or secretions, which can set off
the sensor alarm, in the tubing and flow transducer.
If no water or secretions are visible, wait approximately 10 breaths –
sometimes coughing can cause Check Sensor or Sensor Disconnect alarms.
If the ventilator does not automatically return to the previous mode and
setup, press the Restore option in the Backup Mode Activated message and
check the setting values: PEEP, Rise-Time (auto).
WARNING If the Check Sensor alarm persists repeatedly, provide an alternative
source of ventilation. Then replace the patient circuit and run the O.V.T.
test.
If the “Patient Disconnect” alarm is available and switched off, the Sensor
Failure alarm and backup mode is not activated.
NOTE If the Sensor Disconnect alarm is detected three (3) times within a minute,
the ventilator does not restore the previous mode automatically, but remains
in Open Loop instead. Press the Restore option in the Backup Mode
Activated pop-up window to restore the ventilator to the previous mode.
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