The pattern that has been shown to improve the distribution of gas in the lungs for an intubated patient on volume-controlled continuous mandatory ventilation (VC-CMV) is which of the fol-lowing?
a. Sine waveform
b. Ascending ramp
c. Descending ramp
d. Square waveform
ANS: C
Studies comparing the descending flow pattern with the constant flow pattern suggest that the descending flow pattern improves the distribution of gas in the lungs.
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