Reproducibility Of Inspiratory Muscle Endurance Testing Using Powerbreathe For Copd Patients
PHYSIOTHERAPY RESEARCH INTERNATIONAL(2018)
摘要
BackgroundAssessing the strength and endurance of respiratory muscles is fundamental for characterizing respiratory muscle dysfunction. Although a variety of tests are used to evaluate respiratory muscle endurance, not all of them are applicable in clinical practice. Assessments can be made using a practical device called PowerBreathe (R), but its reproducibility has not been tested in chronic obstructive pulmonary disease (COPD) patients.AimTo verify the reproducibility of the inspiratory muscle endurance test using a manometer and PowerBreathe (R) in COPD patients.MethodsA cross-sectional study was used. In total, 19 moderate-severe COPD patients, male and female, aged 50 to 80years took part in the research. This evaluation consisted of 2 tests: an incremental test and a constant one held on the same day and repeated after 48hr. The incremental test started with 10-cm H2O, adding 10-cm H2O every 2min and taking 1min of rest before increasing the load. The highest load that could be sustained for at least 1min was considered the sustained maximum inspiratory pressure (SMIP) value. The constant test was performed at an intensity of 80% of the SMIP and the maximum time limit was 30min.ResultsIn the incremental test, there was a significant increase in the SMIP compared to the test-retest (6124/64.7 +/- 23.8; p=.015); the value of the relative reproducibility was 0.96, the standard error of the absolute measurement was 4.7 (95% confidence interval 9.2), and the minimum detectable difference was 10.9. In the Bland-Altman analysis, the mean error was 4.2 (confidence interval -7.6 to 16.1). The constant test was not reproducible.ConclusionIt was observed that the incremental test was reproducible to evaluate inspiratory muscle endurance in COPD patients. Furthermore, 2 tests needed to be carried out due to the learning effect.
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关键词
COPD, muscle endurance test, respiratory muscles, test-retest reproducibility
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