The client is a 55-year-old male who was admitted to the hospital 1 week ago for sepsis. The client has been intubated since admission. Current ventilator settings are synchronized intermittent mandatory ventilation (SIMV) respiratory rate 15 breaths/minute, tidal volume (TV) 500 mL, fraction of inspired oxygen (FiO) 40%. Based on the client’s status at 1400, the nurse should plan to do which of the following?