Conceptual and functional prototype of a spirometer printed in 3D

Abstract

In view of the high incidence of pulmonary diseases in Brazil, accurate monitoring, treatment and diagnosis are extremely important. Having said that, the conceptual and functional development of a low-cost spirometer for ventilatory training of patients at a university physiotherapy clinic was sought. Through the study of literature and existing projects, in addition to product development techniques such as benchmarking and topdown, the most robust form of prototype that met the needs was found. The construction of the spirometer involved mechanical and computational components, being designed by a method that allows the ideal geometry and size. In the software part, using the C ++ programming language and in the hardware part, arduino and flow meter. The proposed communication via USB cable. The components used and the manufacture in 3D printer, enabled a very low price compared to the products sold. Therefore, the device connected to a computer via USB provides data with information on respiratory capacity and allows to compare them with data from the literature so that the training of patients occurs effectively. The results obtained with this project can be used for possible improvements and changes, further refining the equipment's accuracy.