Mean airway pressure is highest with what waveform?
A) Rectangular flow
B) Rectangular pressure
C) Ascending ramp flow
D) Sinusoidal flow

Question

Quizplus · Accepted Answer

Mean airway pressure is directly related to the inspiratory time and the pressure level during the inspiratory phase. A rectangular pressure waveform maintains a constant pressure level throughout the inspiratory phase, resulting in a high mean airway pressure. Rectangular flow waveforms, on the other hand, have a shorter inspiratory time and a lower peak inspiratory pressure, resulting in a lower mean airway pressure. Ascending ramp flow waveforms have a longer inspiratory time but a lower peak inspiratory pressure, resulting in a similar mean airway pressure to rectangular flow. Sinusoidal flow waveforms have a variable inspiratory time and pressure level, resulting in a lower mean airway pressure compared to rectangular pressure.

Mean Airway Pressure Is Highest with What Waveform