An increase in airway resistance during pressure-targeted ventilation will have which of the fol-lowing effects?
a. Volume decrease
b. Flow increase
c. Pressure increase
d. Rate decrease
ANS: A
During pressure-targeted (pressure-controlled) ventilation, pressure is unaffected by changes in lung characteristics. However, an increase in airway resistance will cause less volume to be deliv-ered and will change the flow waveform. The set pressure will not be able to overcome the in-creased resistance, resulting in less volume delivery and a decrease in flow (V/TI).
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