Teste de caminhada de seis minutos em crianças e adolescentes com bronquiolite obliterante pós-infecciosa

Abstract

Introdution: Post-infectious bronchiolitis obliterans (PIBO) causes alterations in the pulmonary function that can reverberate in the functional capacity to perform exercise. Objective: Assess the correlation between the spirometric parameters and the six-minute walking test in children and teenagers with PIBO. Methods: Descriptive study involving 25 pacients with PIBO accompanied in Hospital das Clínicas of Universidade Federal de Minas Gerais, in a period of 2008 to 2011. The diagnosis of PIBO was confirmed through clinical tests, radiologic and functional. The six-minute walking test and de spirometry was performed in the criterial of American Thoracic Society (ATS), using the Geigersequations for de predicted values. In the analysis of the correlation between the spirometric parameters and de performed distance was used the Pearsons correlation and/or Spearmans, with final significance level of p<0,05. Results: The media of age was of 11,8 years and the children was accompanied for about 6,4 years. All the pacients hadsymptoms in the final test, with medium values of CVF (%), VEF1(%), FEF25-75%(%) e VEF1/CVF(%) de 82,9; 61,1; 37,8 e 64,9; respectively. In 28% of patients had desaturation during the six-minute walking test. The media of distance predicted and performed was, respectively, 648,5 and 552 meters, with statistically significance variation (p=0,01). Whenthe diference between the distance predicted and performed was higher or equal to 100 meters had correlation between the VEF1 (r = 0,4; p = 0,003) e VEF1/CVF (r = 0,4; p = 0,03). Conclusion: For been the six-minute walking test a easy operation, low cost, reproducible test, and that translate the activites of daily life, constitute a important tool inthe evaluation of the patients with PIBO.