Final answer:
Assisting the postoperative client with deep breathing and coughing reduces the risk for atelectasis by promoting lung expansion and removing mucus or debris.
Step-by-step explanation:
Assisting the postoperative client with deep breathing and coughing can reduce the risk for atelectasis. Atelectasis is a condition where parts of the lung collapse or become partially blocked, leading to decreased oxygen exchange and potential lung infections. Deep breathing and coughing help to expand the lungs and remove any accumulated mucus or debris, preventing the development of atelectasis. By increasing minute respiration, deep breathing and coughing promote the movement of air in and out of the lungs, improving lung function and preventing complications.