@article{Xu_Q-2021_151847,
title = {A portable triboelectric spirometer for wireless pulmonary function monitoring},
author = {Xu, Q. and Fang, Y. and Jing, Q. and Hu, N. and Lin, K. and Pan, Y. and Xu, L. and Gao, H. and Yuan, M. and Chu, L. and Ma, Y. and Xie, Y. and Chen, J. and Wang, L.},
month = {may},
year = {2021},
abstract = {Coronavirus disease 2019 (COVID-19) as a severe acute respiratory syndrome infection has spread rapidly across the world since its emergence in 2019 and drastically altered our way of life. Patients who have recovered from COVID-19 may still face persisting respiratory damage from the virus, necessitating long-term supervision after discharge to closely assess pulmonary function during rehabilitation. Therefore, developing portable spirometers for pulmonary function tests is of great significance for convenient home-based monitoring during recovery. Here, we propose a wireless, portable pulmonary function monitor for rehabilitation care after COVID-19. It is composed of a breath-to-electrical (BTE) sensor, a signal processing circuit, and a Bluetooth communication unit. The BTE sensor, with a compact size and light weight of 2.5 cm3 and 1.8 g respectively, is capable of converting respiratory biomechanical motions into considerable electrical signals. The output signal stability is greater than 93% under 35%–81% humidity, which allows for ideal expiration airflow sensing. Through a wireless communication circuit system, the signals can be received by a mobile terminal and processed into important physiological parameters, such as forced expiratory volume in 1 s (FEV1) and forced vital capacity (FVC). The FEV1/FVC ratio is then calculated to further evaluate pulmonary function of testers. Through these measurement methods, the acquired pulmonary function parameters are shown to exhibit high accuracy (&gt;97%) in comparison to a commercial spirometer. The practical design of the self-powered flow spirometer presents a low-cost and convenient method for pulmonary function monitoring during rehabilitation from COVID-19.},
volume = {187},
journal = {Biosensors and Bioelectronics},
publisher = {Elsevier},
url = {http://dx.doi.org/10.1016/j.bios.2021.113329},
}
