ec808a86__Resources___Fire_Safety_Video__3
[0] Anesthesia breathing circuit [1] Readily available in all anesthetizing locations Highly accurate control of gases delivered to the circuit Oxygen concentration measured is in the inspired gas [2] At typically used flows (2-4 L/min) the rate of change of gas concentration in the circuit is slow APL valve must be closed to deliver gas to the patient and the reservoir bag will distend The flow of oxygen and air must be carefully adjusted and monitored to avoid a blend with an oxygen concentration > 30% (see Table 2) Carbon dioxide absorbent will dry out over time Nitrous oxide can mistakenly be delivered [3] 
Start with desired oxygen concentration. Leave time to flush the circuit if oxygen used previously A connector is needed to adapt the circuit to the delivery system Use lower oxygen flows and higher air flows to attain the desired oxygen concentration in the blended gas (see Table 2) Important reminder: Do not turn on the nitrous oxide
Anesthesia Patient Safety Foundation - Resources - Fire Safety Video
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