Compared with a square wave flow pattern, a decelerating flow waveform has which of the following potential benefits?
1) Reduced peak pressure
2) Improved cardiac output
3) Less inspiratory work
4) Decreased volume of dead space-to-tidal volume ratio (V_D/V_T)

Question

Quizplus · Accepted Answer

A decelerating flow pattern has a gradual decrease in the flow rate during inspiration and results in reduced peak pressure, less inspiratory work, and decreased dead space-to-tidal volume ratio. These benefits can improve gas exchange and reduce the risk of barotrauma in mechanically ventilated patients. Improved cardiac output is not necessarily a potential benefit of a decelerating flow waveform. Therefore, options 2 and 4 are incorrect, and options 1,3, and 4 are correct. Hence, the best choice is B.

Compared with a Square Wave Flow Pattern, a Decelerating Flow