Digital Spirometer with a Mobile Application for Asthmatic Patient

摘要

Asthma is one of the most common respiratory diseases in the world. It is caused by the swelling of the airways that result in the narrowness of the lung. Self-record and monitor of lung condition are essential for asthmatic patients to well control the disease. One way to monitor asthma condition is by using a spirometer. In this project, a digital spirometer with a mobile application that can help asthmatic patients to self-monitor and keep track of their lung condition has been developed. The device can be divided into three parts: hardware, mobile application and database. The hardware consists of NodeMCU, a pressure sensor and a mouthpiece. The analog signal from the sensor was converted to digital by the NodeMCU and sent wirelessly using wifi to smartphone and stored in a database. The lung function parameters calculated are displayed using mobile application. One normal subject aged 24 has been recruited to perform three categories of severity test using the mobile application. The categories are normal, moderate and severe, and the result showed the severity correctly according to the category compared to the theory.