A high-flow nasal cannula set at 15 L has been running for a while without water. Which of the following could have happened?
a. The cilia function increases.
b. Turbulent convection stops.
c. Airway resistance decreases.
d. The isothermic saturation boundary shifts.
ANS: D
The isothermic saturation boundary shifts deeper into the lungs when a person inhales through cold, dry air. In this case, the cilia function decreases and secretions are produced, increasing airway resistance. The turbulent convection increases contact between the inspired air and the mucosa.
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What are the major types of secondary analysis?
What will be an ideal response?