Passport 12/Passport 8 Operator’s Manual 17-7
17.7 Measurement Limitations
The following factors may influence the measurement accuracy:
Leaks or internal venting of sampled gas
Mechanical shock
Cyclic pressure up to 10 kPa (100 cmH
2
O)
Other sources of interference, if any
17.8 Troubleshooting
17.8.1 When the Gas Inlet is Blocked
If the gas inlet (including watertrap, sampling line and airway adapter) is occluded by condensed water, the message
[AG Airway Occluded] appears.
To remove the occlusion:
Check the airway adapter for an occlusion and replace if necessary.
Check the sampling line for an occlusion or kinking and replace if necessary.
Check the watertrap for a build up of water. Empty the watertrap. If the problem persists, replace the watertrap.
17.8.2 When an Internal Occlusion Occurs
Condensed water may enter the module and cause contamination and/or internal occlusions. In this case, the message
[AG Airway Occluded] displays.
To remove the occlusion:
Check for any occlusion in the gas inlet and/or outlet system.
If the problem persists, internal occlusions may exist. Contact your service personnel.
17.9 Removing Exhaust Gases from the System
WARNING
Anesthetics: When using the AG measurement on patients who are receiving or have recently received
anesthetics, connect the outlet to a scavenging system, or to the anesthesia machine/ventilator, to avoid
exposing medical staff to anesthetics.
To remove the sample gas to a scavenging system, connect an exhaust tube to the gas outlet connector of the module.