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The researchers compared systolic, diastolic and pulse pressure measurements captured from smartphone videos to blood pressure readings using a traditional cuff-based continuous blood pressure measurement device. The researchers used the data they gathered to teach the technology how to accurately determine blood pressure and pulse from facial blood flow patterns. They found that on average, transdermal optical imaging predicted systolic blood pressure with nearly 95% accuracy and diastolic blood pressure with pulse pressure at nearly 96% accuracy. - www.sciencedaily.com