Patent ID: 8923945

Claim:
A monitor, comprising: a display; a connector port configured to receive a signal generated in response to propagation of photon density waves through tissue; and data processing circuitry configured to: derive a phase signal and a plethysmography signal from the received signal, wherein changes the phase signal are indicative of changes in photon scattering and changes in the plethysmography signal are indicative of changes in absorption of photons by the tissue; apply a continuous wavelet transform to the phase signal and to the plethysmography signal to generate a phase signal scalogram and a plethysmography signal scalogram, respectively; compare the phase signal scalogram and the plethysmography signal scalogram; identify temporal correlations between changes in photon scattering and changes in absorption of photons by the tissue based on the comparison of the phase signal scalogram and the plethysmography signal scalogram; distinguish physiological and non-physiological components of the signal based on the temporal correlations between changes in photon scattering and changes in absorption of photons by the tissue, wherein physiological components are identified at temporal locations where changes in photon scattering correlate to changes in absorption of photons by the tissue, and non-physiological components are identified at temporal locations where changes in photon scattering do not correlate to changes in absorption of photons by the tissue; generate patient physiological data based on at least the physiological components of the signal; and display the patient physiological data on the display.