A 48-year-old female wt 70 kg, is in the ICU with acute pancreatitis. Her vital signs are as follows: BP 92/60 mm Hg; heart rate 116 bpm; She is intubated with current ventilator settings of VT 700 mL, assist control (AC) rate 12 bpm, FiO2 0.85, and positive end expiratory pressure (PEEP) 5.0 cm H2O. Her ABG reveals a pH of 7.31, PaCO2 of 53 mm Hg, and a PaO2 of 62 mm Hg. Her chest radiograph shows diffuse, fluffy infiltrates. Based upon this assessment the ACNP would order:.