Remote photoplethysmography with consumer smartphone reveals temporal differences between glabrous and nonglabrous skin: Pilot in vivo study |
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Authors: | Timothy Burton Gennadi Saiko Meiyun Cao Alexandre Douplik |
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Institution: | 1. Department of Biomedical Engineering, Toronto Metropolitan University, Toronto, Canada;2. Department of Physics, Toronto Metropolitan University, Toronto, Canada;3. Department of Physics, Toronto Metropolitan University, Toronto, Canada
iBest, Keenan Research Centre of the LKS Knowledge Institute, St. Michael's Hospital, Toronto, Canada |
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Abstract: | Photoplethysmography (PPG) is a noninvasive optical technology, with applications including vital sign extraction and patient monitoring. The PPG acquisition skin type may be of importance. Skin is either nonglabrous (~90%) or glabrous (~10%). Clinical PPG collection is typically from glabrous (fingerpad), while proliferating wearables collecting PPG, which may perform critical functions like arrythmia detection, often acquire from atypical sites. Glabrous skin has significant differences from nonglabrous, including microcirculation, yet comparisons between their PPG signals have not been well reported. Using a smartphone-based remote/contactless PPG, a pilot dataset was collected from the hands (palmar/dorsal) of five healthy volunteers. The data shows statistically significant lead time (52 ± 36 ms) of glabrous over nonglabrous. Further, a trend of glabrous amplitude increase over nonglabrous (31%) was found. Although our study has a small number of participants, these results further the characterization of PPG skin differences, and can be used to inform development of PPG-based devices.![image](/cms/asset/6edcc433-95b9-4a42-a5f3-605d164a1cba/jbio202200187-gra-0001.png) |
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Keywords: | arterio-venous anastomoses microcirculation photoplethysmography remote Photoplethysmography |
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