Which of the following statements accurately reflects the relationship between obesity and surgical risk?

A. Deep breathing exercises should be performed regularly, regardless of the level of pain. The exercises are crucial for preventing lung complications, and pain management should be addressed so that the client can perform these exercises effectively.
B. This statement reflects a proper understanding of the importance of regular deep breathing exercises. Performing these exercises every hour while awake helps to keep the alveoli open and reduces the risk of atelectasis and pneumonia. Consistent practice is essential for maximizing lung expansion and preventing complications.
C. Coughing exercises should be performed regularly, not just when experiencing shortness of breath. Coughing helps to clear secretions from the airways and prevent their accumulation, which can lead to respiratory infections and other complications.
D. Avoiding deep breathing exercises is not advisable. While there may be some discomfort, deep breathing is essential for lung health post-operatively. The exercises help prevent complications such as atelectasis.

A. A nonrebreather mask is used to deliver high-flow oxygen, not low-flow. It provides the highest concentration of oxygen compared to other types of masks, which is crucial for patients with severe hypoxemia. The high-flow oxygen helps in achieving a higher concentration of oxygen in the blood.
B. It is essential that a nonrebreather mask fits snugly over the client's face to ensure that the patient receives the maximum amount of oxygen and to prevent room air from mixing with the oxygen being delivered. A proper seal is necessary to achieve the desired level of oxygenation and to avoid oxygen leakage.
C. The reservoir bag on a nonrebreather mask should not collapse with each breath. Ideally, the bag should remain partially inflated even during inspiration. If the bag collapses completely, it indicates that the patient is not receiving enough oxygen, and the mask may not be functioning correctly.
D. A nonrebreather mask itself does not cause drying of the mucous membranes. However, high-flow oxygen can sometimes lead to dryness of the mucous membranes if not managed properly. Humidification may be required to prevent dryness, but this is not a direct effect of the mask itself.