A 70-kg (154-lb) and 191-cm (6-ft 3-in) postoperative patien…

A 70-kg (154-lb) and 191-cm (6-ft 3-in) postoperative patient is receiving VC, A/C ventilation.  Pertinent data are below: FIO2 0.30 pH  7.38  Mandatory rate 12 PaCO2  48 torr Total rate 16 PaO2  82 torr  VT 600 mL HCO3- 25 mEq/L  Inspiratory time 0.8 sec BE  -2 mEq/L PEEP 5 cm H2O     Which of the following should a respiratory therapist recommend?