Patent ID: 8211022

Claim:
A method for dynamic cerebral autoregulation (CA) assessment, comprising: acquiring a blood pressure (BP) signal having a first oscillatory pattern from a first individual; acquiring a blood flow velocity (BFV) signal having a second oscillatory pattern from the first individual; decomposing the BP signal into a first group of intrinsic mode functions (IMFs); decomposing the BFV signal into a second group of IMFs; determining dominant oscillatory frequencies in the first group of IMFs; automatically selecting a first IMF from the first group of IMFs that has its associated dominant oscillatory frequency in a predetermined frequency range; automatically selecting a second IMF from the second group of IMFs; calculating a time sequence of instantaneous phase difference between the first IMF and the second IMF; computing an average of the instantaneous phase difference in the time sequence; and identifying a CA-related pathological condition in the first individual if the average of the instantaneous phase difference is in a predetermined phase range criterion.