[Expert Solution]: D

D. Use a catheter two thirds the diameter of the tracheostomy tuve. 4. A patient with a tracheostomy tube is receiving mechanical ventilation. The respiratory therapist notices a decrease in the patient’s oxygen saturation, an increase in peak airway pressures, and frequent coughing episodes. What is the most appropriate action for the respiratory therapist to take? A. Preoxygenate the patient for 30 seconds by increasing the