A patient is being mechanically ventilated in the SIMV mode…

A patient is being mechanically ventilated in the SIMV mode with: Mechanical tidal volume of 520 mL Spontaneous tidal volume of 240 mL Mechanical frequency of 4 breaths per minute Spontaneous frequency of 32 breaths/minute Pressure support of 5 cm H20 PEEP of 5 cm H20 100% oxygen Which of the following ventilator adjustments might be most appropriate?