Patent ID: 11931142
Assignee: VIVAQUANT, INC.
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 11:
12. A method comprising:
detecting a presence of an apnea-hypopnea event (AHE) based upon an oxygen saturation signal;
computing a time series of interbeat intervals obtained during the AHE;
decomposing the time series into subcomponents and selecting a subset of the subcomponents with central frequencies corresponding to a range of frequencies exhibited during periodic breathing in apnea-hypopnea events;
computing emphasis signals based upon, for each emphasis signal, at least one respective subcomponent in the subset;
selecting one of the emphasis signals based upon coherence between the emphasis signals and the oxygen saturation signal; and
using the selected one of the emphasis signals to detect further AHEs.