Design and development of portable spirometer with an embedded web server

Abstract

In the present document, the design and the construction of a low cost digital spirometer is presented like a basic equipment for evaluation of the respiratory capacity. A Spirometer is a main device to perform spirometry test which is needed to make clinical diagnosis of chronic obstructive pulmonary disease (COPD). It is an instrument to measure the mechanics ventilator in respiratory studies which allows the analysis, determining and monitoring of diverse human diseases like asthma, bronchitis, emphysema, cystic fibrosis, blood clots caused by pulmonary embolism, and others deficiencies. It is a portable instrument used for easy handling and computerized that fulfills with the American norms given by the American Thorax Society (ATS) and the requirements of the Mexican population. By means of digital electronics and a pneumotachometer, the virtual instrument acquires and processes the respiratory flow using a NI USB interface. The volume-time and flow-volume graphs are displayed means a virtual instrument developed. The spirometrics test includes parameters of the mechanics ventilator like the FEV1 (Forced Expiratory Volume in the first second), FVC (Forced Vital Capacity), and MEF (Maximum Expiratory Flow). A computer-based miniaturized spirometer arrangement is Advised to be accomplished which would use a solid accompaniment burden sensor. A proto-type of a Computer based Spirometer arrangement has been accomplished which would apply a solid accompaniment individual anchorage burden sensor. A committed analog arresting accretion and processing approach has been advised and activated forth with the solid-state burden sensor. Calibration of burden sensor for accepted ethics of activated burden has been performed for breadth tests. The MSP430 is active in designing the micro-controller firmware affairs (using Code Composer Studio) for digitization and manual of the arresting to the computer. Committed computer software for abstracts acquisition, affectation and assay was developed in CVI LabWindows platform. Spirometers are acclimated to admeasurement lung accommodation and acknowledgment of lungs and chest during concrete therapy.