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19.2 AG Safety Information
• To avoid explosion hazard, do not use flammable anesthetic agent such as ether and cyclopropane
for this equipment.
• The presence of other substances in the patient’s breathing circuit, such as ethanol, acetone,
methanol, isopropanol, freon, asthma medication carrier gases, and other infrared absorbing gases,
can influence the anesthesia agent identification and lead to incorrect measurements and
identification.
• Using high-frequency electrosurgical units may increase the risk of skin burn. In this case, do not use
antistatic or conductive respiratory tubing.
• Route all tubing away from the patient’s throat to avoid strangulation.
• Perform the measurement in a well-ventilated environment.
• EtCO
2
values measured from the AG module may differ from that of from the blood gas analysis.
• The AG module automatic suppress physiological alarms until breathing waves have been detected.
Make sure that a patient is properly connected when monitoring with the AG module.
19.3 AG Measurement Limitations
The following factors may influence the measurement accuracy:
â– Leaks or internal venting of sampled gas
â– Mechanical shock
â– Cyclic pressure up to 10 kPa (100 cmH
2
O)
â– Other sources of interference, if any
19.4 AG Display
The AG module can send waves and numerics for all measured anesthetic gases for display on the monitor,
including:
â– CO
2
, O
2
, N
2
O and AA waves
â– awRR: airway respiratory rate
â– MAC: minimum alveolar concentration
â– End tidal (Et) and fraction of inspired (Fi) numerics for CO
2
, O
2
, N
2
O and AA
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