Four Hours After Mechanical Ventilation Is Initiated for a Patient

Four hours after mechanical ventilation is initiated for a patient with chronic obstructive pulmonary disease (COPD) ,the patient's arterial blood gas (ABG) results include a pH of 7.51,PaO₂ of 82 mm Hg,PaCO₂ of 26 mm Hg,and HCO₂- of 23 mEq/L (23 mmol/L) .The nurse will anticipate the need to

A) increase the FIO₂.
B) increase the tidal volume.
C) increase the respiratory rate.
D) decrease the respiratory rate.

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