SIGNAL PROCESSING SYSTEMS AND METHODS FOR ANALYZING MULTIPARAMETER SPACES TO DETERMINE PHYSIOLOGICAL STATES

摘要

The present disclosure relates to signal processing systems and methods, and more particularly, to systems and methods for analyzing multiparameter spaces to determine changes in a physiological state. A first signal and a second signal may be obtained, from which a first plurality of values of a physiological parameter may be computed. At least one of the signals also may be transformed using a wavelet transform, which may be used to generate a scalogram based at least in part on the transformed signal. A second plurality of values may be determined based at least in part on a feature in the scalogram. The first and second plurality of values may then be associated, and a physiological state may be analyzed using the associated first and second values. In an embodiment, the signals may be PPG signals and the associated first and second values may include a Lissajous figure that may permit a user to determine changes in a patient's ventilation state over time.