Pre-Use System Checks
Prior to using the system for AGENT monitoring, it is recommended that the following initial
checks be performed at least once.
9‐8 Monitoring Agents and Gases (AGENT Option)
Remove the sampling line from the patient airway whenever nebulized medications are
Continuous exposure to waste anesthetic gases (including halogenated agents and
nitrous oxide) is not recommended. Always connect a line between the system's waste
gas port and your facility's gas scavenging/evacuation system. Avoid venting any waste
anesthetic gas directly into the room air as exposure to these gases above the
recommended OHSA limits could result.
Do not block the waste gas port on the system. Ensure that the exhaust gas is not
removed from the system under too strong a vacuum. (To prevent this condition, there
must always be an opening to the room air.) Too high a vacuum level will change the
operating pressure of the system and cause inaccurate readings or internal damage.
Use only approved sampling lines and AGENT accessories, as other sampling lines and
accessories will cause inaccurate readings and malfunctions.
Replace the sampling line, replace the airway adapter, and inspect the water trap
between each patient use.
Do NOT over-tighten the sampling line connection to the water trap; only a half-turn should
be needed. Over-tightening this connection may damage the water trap and cause failure of
the trap assembly.
Regularly inspect the line to facility's gas scavenging system for deterioration, and replace
the line if necessary.
After the pneumatic tubing has been prepared as directed above
(page 9‐5), turn on the system and activate AGENT in the Monitor
Setup > Parameters menu; see page 3‐18.
If Agent HW Fail ‐ O2 Sensor is displayed after activation of the
parameter, replace the O2 sensor as described on page 14‐13.
Expression MR400 Instructions for Use