![]() ![]() We therefore developed a far simpler cuffless method, using only heart rate (HR) and modified normalized pulse volume (mNPV) that can be measured using a smartphone, based on the knowledge that ln BP = ln cardiac output (CO) + ln total peripheral resistance (TPR), where CO and TPR are correlated with HR and mNPV, respectively. ![]() However, mainstream methods require an electrocardiogram and photoplethysmogram measurements, and frequent calibration procedures using a cuff sphygmomanometer. Recent cuffless technology has made it possible to estimate BP with reasonable accuracy. Cuffless blood pressure (BP) measurement is an all-inclusive term for a method that aims to measure BP without using a cuff. ![]()
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