You are asked to provide continuous monitoring of the FiO2 provided by a humidified O2 deliv-ery system using a galvanic cell analyzer. Where would you install the analyzer's sensor?
a. Proximal to the heated humidifier
b. On the expiratory side of the circuit
c. Distal to the heated humidifier
d. As close to the patient as possible
ANS: A
To avoid this problem during continuous use in humidified circuits, the clinician should place the analyzer sensor proximal to any humidification device.
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