The ICU nurse is caring for a client who sustained blunt for…

The ICU nurse is caring for a client who sustained blunt force chest trauma during a motor vehicle collision. The client’s diagnosis is flail chest with a right femur fracture. Due to respiratory distress the client has been intubated with venitlator settings as follows: FiO2 60%, tidal volume 500, respiratory rate 12. The nurse should request which of the following additional ventilator settings be added?