Chronic Obstructive Pulmonary Disease Clinical Trial
Official title:
Feel Breathe, Restriction Device Ventilatory Nasal (COPD)
FEELBREATHE®, a nasal ventilatory restriction device, used during an exercise test in treadmill produces changes on breathing efficiency in patients with Chronic Obstructive Pulmonary Disease (COPD). 20 men with COPD with a forced expiratory volume in the first second between 30% and 70% of its predicted value were selected. Then, a maximal incremental cardiopulmonary exercise test was performed to determine ventilatory and cardiac parameters. During the second day, each participant conducted two tests with 30 min of rest between them. Exercise protocol was an identical walk on a treadmill for 10 minutes at a constant rate at 50% of VO2peak. Each test was performed randomnly in two different conditions: 1) oronasal breathing (ONB); and 2) nasal breathing through the FB.
Rationale: A device called FeelBreahte (FB)® has been designed, developed and patented for
inspiratory muscle training in dynamic situations.
Objetive: To examine the effects of FB on lung ventilation, gas exchange and heart rate
during exercise in patients with COPD.
Methods: 20 men with COPD with a forced expiratory volume in the first second between 30% and
70% of its predicted value were selected. In the first visit to the laboratory, baseline
static maximum inspiratory pressure and spirometry were performed previous to the exercise.
Then, a maximal incremental cardiopulmonary exercise test was performed to determine
ventilatory and cardiac parameters. During the second day, each participant conducted two
tests with 30 min of rest between them. Exercise protocol was an identical walk on a
treadmill for 10 minutes at a constant rate at 50% of VO2peak. Each test was performed
randomnly in two different conditions: 1) oronasal breathing (ONB); and 2) nasal breathing
through the FB.
Results: Lung ventilation and gas exchange during exercise in COPD patients was modified
during exercise using FB. Our results showed a positive effects of FB vs ONB on dynamic
hyperinflation, an improved breathing pattern and breathing efficiency, higher expiratory and
inspiratory time and higher perceived effort. Despite these differences, blood oxygen
saturation percentage, oxygen uptake and heart rate showed similar response between both
conditions.
Conclusions: The new device FB used during exercise in COPD patients influenced ventilatory
responses to an efficiency breathing compared to oronasal mode.
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