A critical concern for a post op pt returning to the floor is r/t impaired oxygenation caused by inadequate ventilation. The ABG and assessment finding that alerts the nurse to use oxygen and the ICS is
A. PaO2 is 90mm Hg with crackles
B. PaO2 is 45mm Hg with atelectasis
C. PaO2 is 90mm Hg with wheezing
D. PaO2 is 38mm Hg with clear lung sounds