Protocolo de condicionamento tixotrópico da musculatura respiratória: um resumo da literatura

Abstract

Introduction: The thixotropic conditioning of the respiratory muscles can be achieved when performing an isometric contraction of the inspiratory or expiratory muscle from the Total Lung Capacity (TLC) or Residual Volume (RV). Objective: To review the literature which protocols are being used more and its effects on the respiratory muscles. Methods: Study Review of literature published to date in PubMED and MEDLINE search platforms. They excluded those who did not have their well-defined protocols, which were not specific to the respiratory muscles and possessing other resource beyond thixotropic conditioning. Results: According to the exclusion criteria, the 246 articles found in PubMED, only 7 were selected. Of these 7, only 5 obeyed all the criteria previously determined. It was found that four studies were performed in healthy subjects and 1 patient with chronic obstructive pulmonary disease (COPD). Conclusion: There are few studies published in the literature on the conditioning of the respiratory muscles through the thixotropic maneuvers. Although the results of these studies were similar, this shortage makes it difficult to determine a fixed protocol for carrying out these maneuvers. There is still no consensus, however the most used protoclos are inspiratory effort at three different levels of established pressures and those in which the individual performed an inspiratory effort in 30% of the inspiratory pressure starting from total lung capacity for 5 seconds followed 2-3 seconds of relaxation.