Title :
Reducing the influence of contacting force applied on photoplethysmographic sensor on heart rate variability estimation
Author :
Gu, Y.Y. ; Zhang, Y.T.
Author_Institution :
Joint Res. Center for Biomedical Eng., Chinese Univ. of Hong Kong, China
Abstract :
The performance of a heart rate (HR) and heart rate variability (HRV) monitor based on photoplethysmography (PPG) can be significantly degraded by the variations in contacting force applied on the sensor. This paper presents a wavelet approach to evaluate and reduce the influence of the force variations on the estimation of HR and HRV. The experiment was conducted on eighteen healthy subjects under three different force conditions - low, medium and high, respectively. The preliminary results indicate that reasonably accurate parameter estimation can be achieved from considerably distorted PPG signals even at a single scale of continuous wavelet transform (CWT).
Keywords :
biosensors; cardiology; parameter estimation; plethysmography; wavelet transforms; contacting force; continuous wavelet transform; distorted signals; force variations; heart rate variability estimation; high force conditions; low force; medium force conditions; photoplethysmographic sensor; Biosensors; Continuous wavelet transforms; Distortion; Electrocardiography; Fingers; Force sensors; Heart rate; Heart rate variability; Measurement standards; Wavelet transforms;
Conference_Titel :
Engineering in Medicine and Biology Society, 2003. Proceedings of the 25th Annual International Conference of the IEEE
Print_ISBN :
0-7803-7789-3
DOI :
10.1109/IEMBS.2003.1280452