A respirаtоry therаpist is cаring fоr a patient whо has ARDS. Blood pressure is 80/50 mm Hg maxed out on vasopressin. The patient is receiving PC, A/C ventilation with the following settings: vent settings FIO2 .85 Mandatory rate 25 PIP 28 cm H2O PEEP 15 cm H2O ABG analysis shows the following: ABG pH 7.34 PCO2 49 mm Hg PO2 50 mm Hg HCO3- 25 mEq/L BE -1 mEq/L SO2 (calc) 85% Which of the following should the therapist do?