patient with a flail chest has been placed on a volume cycled ventilator in the emergency room at the following settings:

patient with a flail chest has been placed on a volume cycled ventilator in the emergency room at the following settings: Vt 650 ml A/C 12/min FiO2 0.40 PEEP 5 cmH2O Patient rate 20/min BP 128/68 torr Heart rate 120 bpm The patient is conscious and very agitated. The high pressure alarm is sounding with every other breath. After twenty minutes, blood gases show: pH 7.58 PaCO2 29 torr PaO2 128 torr SaO2 92% HCO3 23 mEq/L Hb 14.5 gm/dL In this situation which of the following would be most appropriate? Group of answer choices Increase the minute ventilation Increase the PEEP Sedate the patient Increase the peak flow