Pulmonary Disease, Chronic Obstructive
Conditions
Keywords
Dyspnea, Cardiopulmonary Exercise Test, Positive-Pressure Respiration
Brief summary
The study will evaluate the effect of positive airway expiratory pressure (EPAP) on patients with chronic obstructive pulmonary disease (COPD) during submaximal upper limb exercise.
Detailed description
The study to be developed from this project aims to evaluate the effect of positive airway expiratory pressure (EPAP) on upper limb exercise-induced dynamic hyperinflation (DH) in patients with chronic obstructive pulmonary disease (COPD). To this end, a cross-over study will be implemented, developed at the Pulmonology Department of Hospital de Clínicas de Porto Alegre. Patients with moderate to very severe, clinically stable COPD will be evaluated. The anthropometric data and pulmonary function will be collected from the medical records, being the study divided into two stages. First stage: At the first visit, dyspnea, quality of life will be evaluated and a maximal incremental cardiopulmonary exercise test (CPET) for upper limb with DH evaluation during exercise. Patients who presented DH on incremental CPET will be invited to return for a second and third visit. In the second and third visit an endurance test will be performed with 80% of the load reached in the incremental CPET and DH determination, one of the tests performed during the application of EPAP through a face mask with pressure level Of 10 cmH2O and another in usual breathing, with the mask without the use of the positive pressure generating valve. The sequence of the test, ie, with and without EPAP, will be obtained through electronic randomization. Patients completing stage 1 will be invited to enter step 2. In this step, which will occur in a single visit, patients will perform a 6-minute pegboard and ring test (6PBRT) with The same monitoring of CPET in three different situations, according to randomization: habitual breathing, half-closed lip breathing (RLS) and the EPAP mask. Thus, it is expected that the application of EPAP through face mask and the use of RLS will reduce DH during submaximal exercise with upper limb, which will be associated with the reduction of dyspnea and increased tolerance to exercise in COPD patients .
Interventions
DIAGNOSTIC_TESTEndurance test for upper limbs
Subjects will initially perform maximal incremental cardiopulmnar test of upper limbs to assess the suggestion of dynamic hyperinflation (DH). After that, it will be randomized, for those who presented DH, to perform the endurance test with and without the use of positive expiratory pressure mask.
DIAGNOSTIC_TESTFunctional test
The 6-min pegboard and ring test (6PBRT) will be performed under usual breathing and during application of the EPAP mask. In this condition will be evaluated the presence of dynamic hyperinflation, perception of effort and dipnea, in addition to exercise capacity.
Sponsors
Associação Fundo de Incentivo à Pesquisa
Hospital de Clinicas de Porto Alegre
Study design
Allocation
RANDOMIZED
Intervention model
CROSSOVER
Primary purpose
TREATMENT
Masking
NONE
Intervention model description
The first arm of the study consists of the identification of patients who present dynamic hyperinflation (HD) through the incremental cardiopulmonary test for upper limbs. Following the HDP patients will perform a resistance test for the upper limbs with an application of EPAP. A final stage of the study will be a test for the upper limbs with an EPAP application.
Eligibility
Sex/Gender
ALL
Healthy volunteers
No
Inclusion criteria
* clinical disease stability (no signs of exacerbation within 8 weeks prior to enrollment) * receiving standard long-term bronchodilator (BD) therapy * able to perform cycle ergometer exercise for upper limbs
Exclusion criteria
* use artificial airways * severe comorbidities, such as heart, orthopedic or neurological diseases that are risky or make it impossible to exercise * Patients on oxygen or with indication of continuous home oxygen therapy
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Dynamic hyperinflation | The inspiratory capacity is assessed at rest before the cardiopulmonary exercise test (CPET) is performed, every two minutes during and immediately after the end of the test. The estimated time of the test will be 8 to 12 minutes. | Dynamic hypersensitivity is assessed through changes in inspiratory capacity. |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Dyspnea | Dyspnea will be evaluated at rest before the cardiopulmonary exercise test (CPET) is performed, every two minutes during and immediately after the end of the test. The estimated time of the test will be 8 to 12 minutes. | Dyspnea will be assessed by the Borg dispenia perception scale. |
| Perception of exertion in upper limbs. | Perception of exertion in upper limbs will be evaluated at rest before the cardiopulmonary exercise test (CPET) is performed, every two minutes during and immediately after the end of the test. The estimated time of the test will be 8 to 12 minutes. | Perforation of exertion in the upper limbs will be assessed through the Borg perception scale. |
Countries
Brazil
Outcome results
None listed