Variações de volumes da parede torácica durante o uso da válvula do tipo Nickerson e Keens em sujeitos saudáveis

• Autor(a) principal: Lima, Cristiane Chaves de Oliveira
• Data de Publicação: 2017
• Tipo de documento: Trabalho de conclusão de curso
• Idioma: por
• Título da fonte: Repositório Institucional da UFRN
• Texto Completo: https://repositorio.ufrn.br/handle/123456789/35878
• topic: Parede torácica; Pletismografia; Cargas; Chest wall; Plethysmography; Loads; CNPQ::CIENCIAS DA SAUDE::FISIOTERAPIA E TERAPIA OCUPACIONAL

Introduction: Endurance is a muscular property that represents a certain amount of time that a muscle can withstand fatigue. To test this property, independent flow valves are more indicated. There are studies, such as Nickerson and Keens (1982), which describes the flow and pressure behavior of the valve, but little is known about chest wall volume variations during the application of different loads separately. Objectives: To investigate how the volume’s variation of the chest wall in its compartments, Pulmonary, Abdominal and Abdome wall of this valve with three different individual loads (minimum load: 10 grams equivalent to 11.2 cmH2O, intermediate load: 40 grams, 14.5 cmH2O, and maximum load: 82 grams, 19,12 cmH2O) in healthy individuals. Methodology: Healthy subjects were recruited. They had no history of respiratory pathologies and all signed the Term of Free and Informed Consent. The study was performed in two days, in which the first one was intended for anthropometric evaluation, pulmonary function analysis and respiratory muscle strength. On the second day, the characterization of the loads (10g, 40g and 82) was associated with Optoelectronic Plethysmography, a noninvasive device that captures the volume’s variation of the chest wall. After data collection, a three-dimensional model of the chest wall was generated in the SmartTracker software. A significance level of 5% (p <0.05) was adopted. To verify the normality of the sample, we used the Shapiro-Wilk test, the ANOVA variance test for normal samples (Bonferroni post-hoc when p <0.05) and Friedman test for non-normal samples (Dunn's test when p <0.05). Results: Ten subjects (5M / 5F) were collected, with a mean age of 23.40 ± 1.26, Body mass index (Kg / m²) 22.03 ± 1.99, and values of pulmonary function and muscle strength within normal limits. The main findings were in respiratory pattern variables, both volume and time. Conclusion: For the 10g intragroup load, no significant changes were observed in any of the variables. From the loads 40g and 82g different ventilatory mechanisms were observed to perform the exercise.