Comparação entre o trabalho desenvolvido e a distância percorrida no teste de caminhada de seis minutos para avaliação da capacidade funcional de pneumopatas crônicos
Comparison between the work and distance outcomes in the six minute walk test to the assessment of functional capacity in chronic respiratory diseases
Pedro Henrique Scheidt Figueiredo, Denílson Otavio da Costa, Thiago Diniz Afeitos, Wagner Júnio Oliveiras Reis
Resumo
Introdução: As alterações fisiopatológicas desencadeadas pelas doenças respiratórias crônicas ocasionam dispnéia e redução da capacidade de executar as atividades de vida diária. O teste de caminhada de 6 minutos (TC6) é um teste simples e de fácil execução para estimar a capacidade funcional. A avaliação do trabalho realizado no TC6 (TC6W) tem sido proposta como uma forma mais sensível de estimar a capacidade de realizar exercício que a forma clássica (distância percorrida). Objetivo: Comparar a relação das duas formas de utilização do TC6 (distância percorrida e trabalho), com a intensidade da dispnéia e o nível de lactato em repouso. Métodos: Foram avaliados 16 pacientes pneumopatas crônicos, quanto à dispneia, nível sanguíneo de lactato em repouso e capacidade funcional, por meio do TC6. A distância percorrida e a potência desenvolvida no TC6 foram correlacionadas à magnitude da dispneia e aos níveis de lactato sanguíneo. A correlação entre as variáveis foi realizada pelos coeficientes de correlação de Pearson ou de Spearman, conforme o teste de normalidade. Resultados: O resultado do TC6W apresentou correlação com o lactato sanguíneo de repouso (r = -0,63; p < 0,05), o que não ocorreu com a distância percorrida no TC6. Quanto à dispneia, tanto o TC6W quanto o TC6 não apresentaram correlação significativa (p = 0,07). Conclusão: O TC6W pode ser utilizado como forma complementar ao TC6 para avaliação da capacidade funcional de pacientes com pneumopatias crônicas
Palavras-chave
Abstract
Introduction: The physiologic changes associated to chronic respiratory diseases cause dyspnea and inability to perform the daily living activities. The 6-minute walk test (TC6) is a simple and practical way to evaluate the functional capacity. Conversely, instead of using the TC6 distance to reflect exercise tolerance, the evaluation of the work performed during the TC6 (TC6W) has been proposed as a more sensitive method to estimate the patients’ functionality. Objective: Compare the relationship of two TC6 forms (distance and work) with dyspnea intensity and lactate level at rest. Methods: Sixteen patients with chronic lung diseases were evaluated as to dyspnea, blood lactate level and functional capacity (TC6). The distance and work developed during TC6 were correlated with the dyspnea magnitude and blood lactate level. For the correlation between variables we used the Pearson or Spearman correlation coefficients, according to the data distribution. Results: The result of TC6W correlated with blood lactate at rest (r = -0.63, p <0.05), which did not occur with the 6MWT. Neither TC6W nor 6MWT showed a significant correlation with dyspnea (p = 0.07). Conclusion: The TC6W can be used as a complimentary method to 6MWD for the functional capacity assessment of chronic lung diseases patients.
Keywords
References
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