What is the advantage of COPD patients breathing through pursed lips during exhalation?
a. Helps the patient focus on breathing.
b. Promotes more complete emptying of the lungs.
c. Reduces the patient's anxiety level.
d. Improves arterial pH levels.
ANS: B
Breathing through pursed lips during exhalation creates resistance to flow. The increased re-sistance causes development of a slight backpressure in the small airways during exhalation, which prevents their premature collapse and allows more complete emptying of the lung.
Health Professions
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