Following a house fire, a patient presents to the emergency department. She is coughing up blood-tinged, frothy sputum and complaining of dyspnea. Arterial blood gases are drawn and the results are: pH = 7.44, PCO2 = 43, PO2 = 60, HCO3 = 24, SO2 = 85%. The arterial blood gas results show and the treatment should include