What is pursed lip breathing specifically designed to achieve?

Pursed lip breathing is specifically designed to slow expiration and prevent airway collapse. This technique is particularly beneficial for individuals with obstructive airway conditions, such as chronic obstructive pulmonary disease (COPD). During pursed lip breathing, the individual inhales through the nose and then exhales through pursed lips, which creates a slight back pressure in the airways. This back pressure helps keep the airways open longer during expiration, reducing the risk of airway collapse and enabling more effective removal of trapped air.

Additionally, by prolonging the expiratory phase, pursed lip breathing helps to decrease the respiratory rate and improve ventilation, allowing the lungs to be more effective in gas exchange. It does not directly increase lung capacity or enhance oxygen absorption, nor does it increase respiratory rate; instead, it promotes a more controlled and prolonged expiration, ultimately improving overall respiratory efficiency.