Problem: You are caring for a patient who is 12 hours post abdominal surgery. The physician order reads, "Incentive spirometry 10 times per hour while awake." What is the rationale for incentive spirometry? How would you teach a patient to use an incentive spirometer? Your patient requires oxygen therapy. Devices available to you are: Nasal cannula, simple face mask, partial rebreather and nonrebreather mask; and venturi mask. Write a brief summary of each of these devices which includes the appropriate liter flow; advantages and disadvantages. Need Assignment Help?