Key result
A nail tip photoplethysmographic sensor provided continuous 24-hour heart rate monitoring consistent with electrocardiography, showing circadian and respiratory variations.
Why the study?
There is a need for a nail tip sensor capable of providing long-term vital data acquisition without uncomfortable wearing feel.
Does a nail tip PPG sensor provide reliable continuous heart rate monitoring compared to ECG?
Does a nail tip PPG sensor provide reliable continuous heart rate monitoring compared to ECG?
A novel nail tip PPG sensor demonstrates feasibility for reliable, continuous 24-hour heart rate monitoring with good correlation to standard ECG.
Answers are grounded in this paper and cite their sources.
May enable unobtrusive long-term PPG monitoring; leaves open validation in cardiovascular populations.
A nail tip sensor that can provide long‐term vital data acquisition without uncomfortable wearing feel is described and discussed. Through 24 h continuous measurement under daily life environment, the proposed nail tip photoplethysmographic (PPG) sensor circuit works effectively and shows no deterioration in the quality of PPG waveform due to aging, peeling, flooding, or vibration. The waveform of measured pulse obtained from the nail tip PPG sensor is consistent with that from electrocardiograph (ECG), excluding the time when saturation or undershoot due to body motion artifact is dominant. Heart rates calculated from PPG and ECG pulse waves with simple algorithm are correlated with each other, and show circadian variation and respiratory variation.
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Ishii et al. (2020) studied this question. Nail tip photoplethysmographic (PPG) sensor vs. Electrocardiograph (ECG) was evaluated on Heart rate measurement consistency and waveform quality. A nail tip photoplethysmographic sensor provided continuous 24-hour heart rate monitoring consistent with electrocardiography, showing circadian and respiratory variations.
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