The client has acute lung injury (ALI) and is ventilated wit…

The client has acute lung injury (ALI) and is ventilated with an FiO2 of 50%, 10cmH2O of PEEP, tidal volume of 750mL, and a rate of 16 breaths per minute. Coarse rhonchi are heard over the upper airways and the client has become agitated with an O2 saturation of 85%. Which priority action should the nurse take?