Instrumentação virtual para de análise de indices espirométricos

• Ano de defesa: 2006
• Autor(a) principal: Renata da Encarnacao Onety
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Minas Gerais; UFMG
• Palavras-chave em Português: Espirometria; Doenças respiratórias; Instrumentação virtual; LabView; Engenharia elétrica; Bioengenharia
• Link de acesso: http://hdl.handle.net/1843/AVFV-6WHEUJ

Respiratory system is a part of a complex set of systems that composes the human body developing a specific function in order to keep constant physical conditions and concentrations of dissolved substances on the internal environment of our organism. Year by year the number of people with respiratory diseases increases, like COPD (Chronic Obstructive Pulmonary Disease) or Asthma. A strategy for the reducion of morbidity, mortality and expenses with chronic diseases is the recognition and intervention in their early stages. Treating about mechanic aspects, to assess the efficiency of respiratory system, allowing the control, diagnosis and treatment of diseases uses respiratory function tests.Among different existing methods, we chose to study Spirometry for being a simple technic that offers the necessary subsidies for a good follow-up of the patient. Due the high cost, few clinics acquire spirometers in Brazil, once most of them are imported. Regarding the analysis procedures, these devices present the drawback of using reference values based on the north-american or european populations. In the presence of these facts, the purpose of this research is the development of a virtual instrumentation software that samples emulated signals from an analog device (WaveForm Function Generator), with a low-cost A/D board, low transfer rate and low resolution (12 bits), and stores, organizes datas and extracts indexes used on Spirometry. The software was developed onLabView R plataform and their informations were stored on MySQL database. For estimation of spirometric indexes we use Brazilian guidelines and theirs reference values. The aggregation of new functions is simplified by adding independent modules, that allows diagnostics actualizations according the algorithm desired. One observes that with the utilization of a simple, low-cost, low sample rate and low resolutionA/D board is possible to reach the required values of the spirometric exams rules. This shows that it is possible and viable the development of a low-cost flow spirometer adapted to brazilian population characteristics.