Obstructive Sleep Apnea
Conditions
Brief summary
Introduction: The Obstructive Sleep Apnea (OSA) is characterized by obstructed superior airway during sleeping period promoting intermittent hypoxia-reoxygenation events. These events cause consequences such as cardiorespiratory and peripheric muscle structure alterations, which can cause reduction of the exercise tolerance. In this sense the continuous positive airway pressure (CPAP) is important to decrease the repercussions of the illness and cooperate to maintain the exercise functional capacity. To measure this capacity, one good option is the six-minute step test (6MST), that is low cost and submaximal, in addition to being adaptable and portable. However, there are doubts if it´s really capable to determinate the functional capacity of exercise of individuals with OSA treated with CPAP. Objective: Evaluate the validity and reproducibility of 6MST to determine the functional capacity of exercise in individual with OSA treated with CPAP and develop a model of a reference equation for the performance of the test in this population. Material and methods: This is an observational, prospective and cross-sectional study, in which will be evaluated 132 volunteers (66 men and 66 women), with age between 18 and 65 years, diagnosed with OSA of moderate and severe degree, treated with CPAP for a minimum of three months, recruited of the ambulatory of pneumology of Otávio de Freitas Hospital. Initially will be collected personal and anthropometric information, answered to sleep questioners, quality of sleep and physical exercise, also respiratory muscle strength and lung function. The realization of the tests to evaluate the functional capacity of exercise will be done in two days with a maximum of seven days between the tests. In each day, the volunteers will do two 6MST and two six-minute walk test (6MWT), which order will be determined by randomization. Expected Results: It is expected that the 6MST to be showed as reproducible and capable to quantify the functional capability of exercise in individuals with OSA treated with CPAP.
Interventions
OTHERSix-minute step test
Volunteers will be instructed to go up and down one step for six minutes
OTHERSix-minute walk test
Volunteers will walk the longest distance possible by performing turns in a 30 meter corridor for six minutes
Sponsors
Universidade Federal de Pernambuco
Study design
Observational model
OTHER
Time perspective
CROSS_SECTIONAL
Eligibility
Sex/Gender
ALL
Age
18 Years to 65 Years
Healthy volunteers
No
Inclusion criteria
* Individuals with age between 18 and 65 years; * Obstructive Sleep Apnea on moderate and severe degree (diagnosed by polysomnography); * BMI bigger then 18 and less than 35 kg/m2; * Treatment with CPAP at least three months, with use of the equipment for a time interval superior of 4h/night during five days per week.
Exclusion criteria
* Individuals with comorbidities such as uncontrolled hypertension and diabetes, orthopedic and neurologic alterations, respiratory disorders such as COPD and asthma, or any cardiovascular and respiratory which won't permit the realization of the tests.
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Walked distance | Two days | Distance walked on six-minute walk test |
| Number of steps | Two days | Number of steps climbed on the six-minute step test |
Countries
Brazil
Outcome results
None listed