Preliminary comparison of respiratory signals using acceleration on neck and humidity in exhaled air
| Autor: | Harutaka Mekaru, Shinya Kano |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
010302 applied physics
Correlation coefficient Heartbeat business.industry Humidity 02 engineering and technology 021001 nanoscience & nanotechnology Condensed Matter Physics Sitting Accelerometer 01 natural sciences Electronic Optical and Magnetic Materials Acceleration Hardware and Architecture 0103 physical sciences Respiration Medicine Electrical and Electronic Engineering Respiratory system 0210 nano-technology business Biomedical engineering |
| Zdroj: | Microsystem Technologies. 27:1-9 |
| ISSN: | 1432-1858 0946-7076 |
| Popis: | A microelectromechanical system is recently used for measurements of vital signs. Although the neck is regarded as an alternate observatory location of heartbeats, there have not been reports to monitor respiration electrically. The purpose of this preliminary study is to compare respiratory signals based on acceleration on the neck and humidity in exhaled air. An accelerometer on the side of the neck was used to measure respiration. The accelerometer was hooked on a neck lanyard and gently contacted the skin close to a branch of the carotid artery. We performed a frequency domain analysis (lower than 0.5 Hz for respiration and 20–40 Hz for heartbeat) to separate respiratory signals by filtering via the fast-Fourier transform. We compared the signals based on acceleration and air humidity using a respiratory sensor, which comprised of a nanoparticle film on gold microelectrodes. The two measurements of a correlation coefficient, bias, and standard deviation of a Bland–Altman plot were 0.61, 0.41, and 2.5 bpm, respectively. Additionally, we conducted tests to measure the respiration and heartbeat of a walking person. These results show that the accelerometer gently contacting the skin is capable of monitoring the respiration of people undergoing minor movements such as sitting on a chair or standing. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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