Why Do Pressure-Flow Estimates of Orifice Size Decrease in Accuracy

question 11

Multiple Choice

Why do pressure-flow estimates of orifice size decrease in accuracy when the orifice area exceeds 80 mm²?

• A)Limitations of the pneumotachograph to record high rates of airflow
• B)Limitations of the transducers to detect small pressure changes
• C)Limitations of the pneumotachograph to record an increase in nasal airflow
• D)Limitations of the transducers to measure an increase in nasal resonance
• E)Limitations of the transducers to detect a decrease in oral airflow

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