Saunders Respiratory Practice 2025 - Free Respiratory Practice Questions and Study Guide

Exhaling slowly through pursed lips is a key component of pursed lip breathing, as it encourages prolonged exhalation, which can help improve air exchange and reduce the feeling of breathlessness. This technique creates a slight back pressure in the airways, keeping them open longer during exhalation and preventing premature closure of the small airways. This extended exhalation can lead to improved ventilation and is particularly beneficial for individuals with respiratory conditions such as COPD.

The other choices do not contribute effectively to the goals of pursed lip breathing. Rapid inhalation could lead to hyperventilation and may not allow for the controlled breathing pattern that is essential to this technique. Holding the breath for several seconds is not a component of pursed lip breathing, as it does not facilitate the prolonged exhalation that helps improve lung function. Practicing only while resting limits the application of this technique, which is also beneficial during physical activity to manage dyspnea and enhance respiratory efficiency.