A one-month-old male with a ventricular septal defect is ref…

A one-month-old male with a ventricular septal defect is referred for a surgical evaluation. Upon arrival, the infant is intubated and ventilated via pressure-limited, time-cycled ventilator with FIO2 of 50%, frequency 20 b/min, PIP 18 cmH2O and 5 cmH2O PEEP. Initial blood gas results are as follows: pH 7.31 PaCO2 58 mmHg HCO3 28 mEq/liter PaO2 68 mmHg Which of the following is the best recommendation?