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. 2020 Apr 4;10(4):34. doi: 10.3390/bios10040034

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© 2020 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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Correlation plots for (A) forehead pulse rate vs. SPYDR pulse rate; (B) finger pulse rate vs. SPYDR pulse rate; (C) forehead SpO₂ vs. SPYDR SpO₂; and (D) finger SpO₂ vs. SPYDR SpO₂. The linear relationship shown in each case suggests a high correlation between SPYDR and the respective commercial sensor.