Development of Maximal Respiratory Pressures Measurement System at Functional Residual Capacity Level
This paper presents a new methodology and system to perform lung function test by measuring maximal inspiratory and expiratory pressures. With this novel system, the maximal inspiratory pressure can be measured at residual volume or at functional residual capacity. Likewise, the maximal expiratory pressure can be measured at total lung capacity or at functional residual capacity. The objective of this project is to develop, test and perform the validation of the new methodology and electromedical system to measure the respiratory pressures with automatic detections of the inhaling and exhaling maneuvers moments, being capable of measuring lung pressures at functional residual capacity. Calibration tests of the flow and pressure sensors were performed to validate the correct function of the electronic system and an experimental procedure was performed in order to assess biological measures. The system has shown steady behavior and the measures acquired are consistent with the literature. Lastly, this system has shown evidence that it is appropriate to measure the inspiratory and expiratory maximal lung pressures at functional residual capacity and, also, at residual volume and total lung capacity, respectively.