Abstract
We report a smart phone based handheld wireless spirometer which uses a Lilly type sensing flowhead for respiratory signal acquisition and transmits the data to smartphone or other mobile terminals with Bluetooth signal transmission for data processing and result display. The developed spirometer was demonstrated to be able to detect flow rates ranging from 0–15 L/s with an accuracy of 4 mL/s, and can perform tests of flow volume (FV), forced vital capacity (FVC), forced expiratory volume in 1 s (FEV1), peak expiratory flow (PEF), etc. By having the functions and precision comparable to laboratory spirometers, it satisfies the American Thoracic Society and European Respiratory Society (ATS/ERS) proposed performance requirements for spirometer. At the same time, it is low cost, light and handy, low power consumption battery-powered. The test of 12 cases of subjects using the developed spirometer also indicated that it was easy to use for both providers and patients, and suitable for the Point of Care Test (POCT) of chronic obstructive pulmonary disease (COPD) and asthma at general-practice settings and homes.
Highlights
Millions people in the world are suffering from chronic obstructive pulmonary disease (COPD)and asthma [1], the two most common respiratory diseases which can seriously impact people’s health, and even cause death
We have developed a smart phone based handheld wireless spirometer which is a light and portable wireless handheld unit
It consists of just a Lilly type sensing flowhead with Bluetooth wireless transmitter for respiratory signal acquisition and data wireless transmission, while the data processing and result displaying are completed by a smart phone or other mobile terminals
Summary
Millions people in the world are suffering from chronic obstructive pulmonary disease (COPD)and asthma [1], the two most common respiratory diseases which can seriously impact people’s health, and even cause death. Patients with asthma and COPD are recommended to perform daily measurements of static and dynamic respiratory functions to track their pulmonary health with ease and to prevent exacerbations [2] Spirometers are the most common machines for such tests [3,4]. They measure the volume and speed of air that is inhaled and exhaled to assess lung function and to provide a first-level diagnostic test for the pulmonary diseases and the progression of disease. Portable spirometers are usually either compact desktop units or handheld devices for general-practice and home use [6,8]
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