J Med Syst - Relationship between measurement site and motion artifacts in wearable reflected photoplethysmography.

Tópicos

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Resumo

Pulse rates obtained from wearable photoplethysmography (PPG) sensors are important for monitoring cardiovascular condition, especially during exercise. However, it is difficult to precisely count pulse rates during exercise because PPG is sensitive to body movement. The artifacts from body movement are caused by a change in the blood volume at the measurement site, in addition to pulsatile changes. Here, we investigated the influence of motion artifact with respect to light source and anatomical sites. In this study, we compared the signal from green-light PPG to that from infrared PPG at different anatomical sites. In these experiments, 11 subjects were asked to either assume a resting position or generate spontaneous motion artifact by jumping and swinging their arm. As a result, pulse rates obtained from green-light PPG showed a higher correlation with the ECG R-R interval as compared to those obtained with infrared. Additionally, the signal from the upper arm showed less artifact than did the peripheral one. Therefore, the green-light PPG may be useful for pulse rate monitoring.

Resumo Limpo

puls rate obtain wearabl photoplethysmographi ppg sensor import monitor cardiovascular condit especi exercis howev difficult precis count puls rate exercis ppg sensit bodi movement artifact bodi movement caus chang blood volum measur site addit pulsatil chang investig influenc motion artifact respect light sourc anatom site studi compar signal greenlight ppg infrar ppg differ anatom site experi subject ask either assum rest posit generat spontan motion artifact jump swing arm result puls rate obtain greenlight ppg show higher correl ecg rr interv compar obtain infrar addit signal upper arm show less artifact peripher one therefor greenlight ppg may use puls rate monitor

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