23 - 8 BeneVision N22/N19 Patient Monitor Operator’s Manual
23.8 Changing the Anesthetic Agent
When the anesthetic agent used on the patient is changed, the AG module detects the mixed anesthetic gas
during the transition of two anesthetic agents. The time required for completing the replacement of anesthetic
agent depends on anesthesia type (low flow or high flow) and the characteristics of anesthetic agents
(pharmacokinetics). During the transition of two anesthetic agents, the monitor gives no prompt messages and
the MAC value displayed may be inaccurate.
The AG module can identify two anesthetic agents automatically. When the proportion of primary and
secondary anesthetic agents in the mixture changes, the AG module can distinguish between them according to
their contributions to the MAC value. Then primary and secondary anesthetic agents will be exchanged for
display.
23.9 AG Troubleshooting
If the AG airway is occluded, the message AG Airway Occluded appears. In this case, check for the follows until
the message disappears:
1. Checkthe airway adapter for occlusion and replace if necessary.
2. Check the sample line for occlusion or kinking and replace if necessary.
3. Check the watertrap for water or occlusion. Empty the watertrap, or replace the watertrap if necessary.
4. Check the gas outlet and the exhaust tube for any occlusion.
If the message does not disappear, it is probably the module fault. Contact the service personnel in this case.
• For the physiological and technical alarm messages, see D Alarm Messages.
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