Abstract
The diagnostic of respiratory muscle dysfunctions is usually conducted using mechanical instruments. In order to improve the measurement systems used in these exams, a new system, based on a microcontroller and a PC, was developed in our laboratory. Theoretically, this system is able to overcome several limitations of the traditional system, as well as to allow the evaluation of the dynamic performance of the respiratory muscles. This work aims to evaluate the practical use of this new system and the performance of the inspiration (τi) and exhalation (τe) time constants to detect respiratory muscle limitations. The pressures measured by the new system were coherent with that measured by a traditional one (R≅0.97). The inspiration pressures (Pimax) were lower in patients (p<0.0001), and τi was higher in patients (p<0.008), results that were in close agreement with the physiology. The evaluation of the clinical usefulness showed that Pimax, measured with this new instrument, is sufficiently accurate for clinical use. We concluded that the developed system could be a useful tool for the evaluation of respiratory muscles.
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Faria, A.C.D., Miranda, I.A., Melo, P.L. (2007). Desenvolvimento de Instrumentação para Análise da Força Muscular Respiratória: Avaliação do Desempenho e Proposta de Novos Parâmetros. In: Müller-Karger, C., Wong, S., La Cruz, A. (eds) IV Latin American Congress on Biomedical Engineering 2007, Bioengineering Solutions for Latin America Health. IFMBE Proceedings, vol 18. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-74471-9_118
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DOI: https://doi.org/10.1007/978-3-540-74471-9_118
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