Chronic Obstructive Pulmonary Disease
Conditions
Keywords
exercise tolerance, dynamic hyperinflation, respiratory mechanics
Brief summary
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.
Interventions
BEHAVIORALPursed-lip breathing
Pursed-lip breathing involves a nasal inspiration followed by expiratory blowing against partially closed lips, avoiding forceful exhalation.
BEHAVIORALNormal Breathing
Sponsors
Universidade Federal do Rio de Janeiro
Study design
Allocation
RANDOMIZED
Intervention model
CROSSOVER
Primary purpose
TREATMENT
Masking
SINGLE (Outcomes Assessor)
Eligibility
Sex/Gender
ALL
Age
40 Years to No maximum
Healthy volunteers
No
Inclusion criteria
* Clinical diagnosis of chronic obstructive pulmonary disease (COPD) * Regular treatment at Clementino Fraga Filho University Hospital (UFRJ)
Exclusion criteria
* Exacerbation in the preceding 4 weeks * SpO2\<85% at peak exercise * Other diseases that may contribute to dyspnea and exercise intolerance
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Endurance time | within the first 01 hour |
Secondary
| Measure | Time frame |
|---|---|
| inspiratory capacity | within the first 01 hour |
| oxygen saturation | within the first 01 hour |
| dyspnea | within the first 01 hour |
| forced oscillation variables | within the first 01 hour |
Countries
Brazil
Outcome results
None listed