Figure 7

General method for deriving heart rate and blood pressure from ICU signals. Each channel of ECG and ABP is fed to beat detection and feature extraction algorithms. Signal quality, ψ, of each underlying signal is then performed. Derived parameters (HR and ABP) are fed to individual KFs, together with the signal quality of the channel of the channel from which the estimate is made. Finally, estimates of the same parameter are fused, using signal quality and the innovation from the KF to provide a robust estimate of the parameter.