A 5-ft 5-in, 158-lb) 28-year-old female is receiving PC, A/C…

A 5-ft 5-in, 158-lb) 28-year-old female is receiving PC, A/C ventilation.  The following data are available:   FIO2           0.45 Mandatory rate         14 Total rate         16 Set inspiratory pressure         21 cm H2O Exhaled VT       687 mL I:E           1:4 PEEP         8 cm H2O     pH            7.51 PaCO2          22 mm Hg PaO2        120 mm Hg HCO3-          22 mEq/L BE            0 mEq/L SaO2 (calc)           99%   A respiratory therapist should recommend decreasing the