Continuous Cuffless Blood Pressure Measurement using PPG and ECG

Continuous blood pressure changes monitoring with regular time intervals conventionally is performed by auscultatory and oscillometric measurement techniques. It has limitations on the patient naturality and inconvenience because of repeated arm pumping. This study aims to determine a method of blood pressure measurement that has continuous monitoring, cuffless, wearable and ambulatory measurement features and accuracy of clinical standards. The configuration uses PPG sensor and lead-1 ECG to obtain the PTT and PIR parameter. The parameter used to determine systolic and diastolic blood pressure. Tests performed on 40 healthy subjects in seated, stand and lying down position. The results prototypes have a mean +/- standard deviation (SD) to estimate of systolic, diastolic and pulse pressure were 0.55 +/- 7.42 mmHg, 0.37 +/- 7.20mmHg, 0.08 +/- 10.07mmHg, respectively. The MAD of systolic, diastolic and pulse pressure were 6.02 mmHg, 6.00 mmHg, and 8.03 mmHg, respectively. The highest correlation between estimated and reference blood pressure had Rsquare 0.719 for diastolic and 0.672 for systolic. Regression analysis for each subject between PTT and pulse pressure with highest Rsquare is 0,894 and for PIR and diastole is 0,663.