Pursed-lip breathing (PLB) has been advocated to reduce respiratory rate and improve oxygen saturation in patients with chronic obstructive pulmonary disease (COPD) at rest. Although PLB is a strategy that potentially reduces expiratory flow limitation, there are only few studies addressing its effects on exercise. This study aimed to assess the ability of PLB to change the breathing pattern, degree of dynamic hyperinflation (DH) and arterial oxygenation in COPD patients during exercise. Exercise tolerance was evaluated by endurance time and respiratory mechanics was evaluated by forced oscillation technique.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
SINGLE
Enrollment
40
Pursed-lip breathing involves a nasal inspiration followed by expiratory blowing against partially closed lips, avoiding forceful exhalation.
Clementino Fraga Filho University Hospital
Rio de Janeiro, Rio de Janeiro, Brazil
Endurance time
Time frame: within the first 01 hour
inspiratory capacity
Time frame: within the first 01 hour
oxygen saturation
Time frame: within the first 01 hour
dyspnea
Time frame: within the first 01 hour
forced oscillation variables
Time frame: within the first 01 hour
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