If you notice that the CO2 absorbent is exhausted during the surgical procedure, which of the following minimal fresh gas flows (L/min) will make the CO2 absorbent unnecessary?
ExplanationB. Advantages of a circle system include the use of low fresh gas flow rates because of the presence of a CO2 -absorbent canister. However, if the CO2 absorbent is exhausted during a surgical procedure, the fresh gas flow rate has to be increased. A minimum fresh gas flow rate of 5 L/min will make the use of the absorbent unnecessary. Newer anesthesia machines allow changing the CO2 -absorbent canister during the surgical procedure, if necessary.