Encouraging pursed-lip breathing helps clients with advanced emphysema by increasing the time they exhale, which helps in expelling trapped air from the lungs and improves oxygen exchange. This technique can help to reduce shortness of breath. Increasing nasal oxygen to high levels might suppress the patient’s drive to breathe, placing him in a lateral Sims' position is not an appropriate response for managing breathlessness due to emphysema, and having him breathe into a paper bag could increase anxiety and worsen the condition.