Feel Breathe, Restriction Device Ventilatory Nasal (COPD)
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.
Inclusion Criteria:

 Patients diagnosed of Chronic Obstructive Pulmonary Disease (COPD) at least 6 months
 before, with a forced expiratory volume in the first second (FEV1) between 70 and 30% of
 predicted value

 Exclusion Criteria:

 -  Suffer other illness.

 -  Unwillingness to complete the study requirements.

 -  Cardiovascular diseases (resting electrocardiogram and during exercise).

 -  Elevated resting blood pressure (>130/85 mmHg). All inclusion and exclusion criteria
 were assessed by a detailed medical history and, where noted, by specific
 measurements.