Final answer:
The correct statement indicating an understanding of the reason for pursed-lip breathing is that it prolongs exhalation, keeping the alveoli from collapsing, which is beneficial in COPD.
Step-by-step explanation:
The statement by the client with chronic obstructive lung disease (COPD) that indicates an understanding of the major reason for the use of occasional pursed-lip breathing is: "By prolonging breathing out with pursed lips the little areas in my lungs don't collapse." This technique helps to prevent airway collapse by creating a back-pressure in the airways and allows for better expiration of air, which can be difficult for individuals with COPD. Pursed-lip breathing reduces the respiratory rate and keeps the airways open longer during expiration, which may improve the gas exchange and increase the amount of time alveoli are exposed to the inhaled air, aiding in more effective breathing.
Pursed-lip breathing is particularly beneficial for people with COPD, as it can help slow down exhalation and prevent the collapse of the small airways and alveoli, which is an obstacle that these patients frequently experience. The technique also helps reduce the work of breathing and can improve the oxygenation of blood by allowing the lungs more time to transfer oxygen to the blood and remove carbon dioxide from the body.