A 6’3″, 180 lb male patient is being mechanically ventilated…

A 6’3″, 180 lb male patient is being mechanically ventilated in the control mode with FIO2 .6, a set rate of 8, and a tidal volume of 800 ml. Peak airway pressure is 33 cmH2O. Breath sounds are diminished. Results of an arterial blood gas analysis are below. A desired PaCO2 of 40 is ordered. pH = 7.28PaCO2 = 83HCO3 = 21 mEq/LPaO2 = 75 torrSaO2 = 93% On the basis of these results, the most appropriate action would be to: I. increase the peak flow rateII. increase the set rate to 16III. increase the set rate to 20IV. increase the tidal volume to 900 ml