Beneficial physiological effects of positive end-expiratory pressure (PEEP) include which of the following?
I.increased PaO₂ for given FIO₂
II.increased lung compliance (C_L) III.decreased shunt fraction
IV.increased functional residual capacity

Question

Quizplus · Accepted Answer

Positive end-expiratory pressure (PEEP) can increase PaO2 for a given FiO2 by recruiting collapsed alveoli and improving ventilation-perfusion matching, leading to decreased shunt fraction. PEEP also increases lung compliance and functional residual capacity. Therefore, all options I, II, III, and IV are correct.

Beneficial Physiological Effects of Positive End-Expiratory Pressure (PEEP) Include Which