In checking a servo-controlled heated-wire humidifier system, you notice that a few drops of condensate tend to form but only near the patient's airway. Based on this observation, what can you conclude?
a. The gas at the airway is fully saturated.
b. The temperature setting of the heater is too high.
c. The airway temperature exceeds the dew point.
d. The temperature setting of the heater is too low.
ANS: A
To ensure that the inspired gas is being properly conditioned, clinicians should always adjust the temperature differential to the point that a few drops of condensation form near the patient "wye." Lacking direct measurement of humidity, observation of this minimal condensate is the most reliable indicator that the gas is fully saturated at the specified temperature.
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