A client with Guillain-BarrĂ© syndrome is admitted to the int…

A client with Guillain-Barré syndrome is admitted to the intensive care unit. The client is alert but reports increasing shortness of breath and difficulty clearing secretions. Assessment reveals shallow respirations at 28/min, use of accessory muscles, and weak cough. Oxygen saturation is 90% on 2 L/min via nasal cannula. Which action should the nurse anticipate as the most urgent intervention?