How does the set inflation pressure (Phigh) with APRV compare with conventional ventilation?
A. It is a gross underestimate of end-inspiratory transpulmonary pressure.
B. Spontaneous breathing during the inflation phase lessens the end-inspiratory stretching pressure on the lung.
C. The periodic rapid deflation-reinflation during the prolonged inflation phase diminishes the incidence of lung injury.
D. It results in underinflation of healthy lung units and adequate inflation of low compliant lung regions.
ANS: A
A. Correct response: Unlike conventional ventilation, the set inflation pressure with APRV is a gross underestimate of end-inspiratory transpulmonary pressure.
B. Incorrect response: Spontaneous breathing during the inflation period will add to the end-inspiratory stretching pressure on the lung.
C. Incorrect response: The prolonged high pressure inflations and periodic deflations-reinflations may potentially injure the lungs.
D. Incorrect response: This statement is false.?
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