title: Separate estimation of long- and short-term systolic blood pressure variability from photoplethysmograph.
abstract: This paper proposed a method to monitor systolic blood pressure (BP) variability without using a cuff during the daytime. In this method, BP variability of long-term and short-term were separated and estimated respectively from features of phoplethysmograph (PPG) through the use of a frequency filter. Then, total variability was obtained from the combination of long-term and short-term. BP by using a cuff (ground truth) and PPG of nine healthy young subjects were measured during the daytime; then BP variability was estimated from PPG to verify the validity of our method. As a result, the correlation coefficients between measured BP variability and estimated BP variability was improved from r = 0.35 in previous method to r = 0.41 in proposed method. In particular, the estimation results in short-term BP variability showed good accuracy (r = 0.67). This method of estimating BP variability has the potential to be a simple and continuous BP monitoring system during the daytime.
authors.forename: Riho
authors.initials: R
authors.lastname: Kondo
authors.forename: Md Shoaib
authors.initials: MS
authors.lastname: Bhuiyan
authors.forename: Haruki
authors.initials: H
authors.lastname: Kawanaka
authors.forename: Koji
authors.initials: K
authors.lastname: Oguri
mesh_terms: D000328:Adult; D001794:Blood Pressure / Q000502:physiology*; D001795:Blood Pressure Determination / Q000379:methods*; D004867:Equipment Design; D005260:Female; D064368:Healthy Volunteers; D006801:Humans; D008297:Male; D015233:Models, Statistical; D008991:Monitoring, Physiologic; D017156:Photoplethysmography / Q000379:methods*; D012044:Regression Analysis; D015203:Reproducibility of Results; D019722:Sphygmomanometers; D055815:Young Adult