Pulse transit time as an indirect marker for variations in cardiovascular related reactivity
Technology and Health Care
Performance analysis of multi-innovation gradient type identification methods
Automatica (Journal of IFAC)
Cuff-Less Estimation of Blood Pressure Using Pulse Transit Time and Pre-ejection Period
ICCIT '07 Proceedings of the 2007 International Conference on Convergence Information Technology
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It is widely accepted that pulse transit time (PTT), from the R wave peak of electrocardiogram (ECG) to a characteristic point of photoplethysmogram (PPG), is related to arterial stiffness, and can be used to estimate blood pressure. A promising signal processing technology, Hilbert-Huang transform (HHT), is introduced to analyze both ECG and PPG data, which are inherently nonlinear and non-stationary. The relationship between blood pressure and PTT is illustrated, and the problems of calibration and re-calibration are also discussed in this paper. Moreover, multi-innovation recursive least square algorithm is employed to update the unknown parameter vector for the model and improve the results. Our algorithm is tested based on the continuous data from MIMIC database, and the accuracy is calculated to validate the proposed method.