Continuous Blood Pressure Measurement based on Pulse Transit Time
BAI Lihong
WANG Cheng
WEN Miao
ZHANG Tong
Abstract：To achieve continuous non-invasive blood pressure measurement,a method based on pulse transit time (PTT)was presented.We got PTT from electrocardiograph(ECG)and photoplethysmograph(PPG).The start point of PTT on ECG-R wave point and the stop point of PTT on PPG characteristic point was gotten.The mathematical model of systolic blood pressure (SBP)and dias-tolic blood pressure (DBP)were gotten by making regression analysis between PTT and SBP or DBP measured with a mercury sphyg-momanometer.Forty-one healthy young people were studied using this method.The correlation coefficients of SBP and DBP between our system and the mercury sphygmomanometer were 0.82 and 0.73,respectively.It was found that the estimated SBP and DBP dif-fered from the reference BP by 0.15 ±2.05 mmHg and 0.12 ±2.16 mmHg,respectively.The Bland-Altman method was used to check the consistency of the blood pressure measured by our system and the mercury sphygmomanometer.The results show that blood pressure measured by this method is good agreed with which measured by mercury sphygmomanometer.
Keywords：Blood pressureContinuous measurementPulse transit timePhotoplethysmographElectrocardiogram
Publication Date：2014-01-01
Online Publishing Date：2026-09-11(First online date of this platform, not the publication date of the document)
Pages：5( 221-225 )