A postoperative 46-year-old, 80 kg (176 lb) patient is breat…
A postoperative 46-year-old, 80 kg (176 lb) patient is breathing spontaneously at a rate of 30/min with an FiO2 of 0.50. The following ABG results are obtained: pH 7.29 | PaCO2 62 torr | PaO2 64 torr | HCO3 29 mEq/L | BE +4 Mechanical ventilation is instituted with a VT of 640 mL and an FiO2 of 0.5. The rate should be set on: