DISCRIMINATION OF CHEYNE-STOKES RESPIRATION PATTERNS BY USE OF OXIMETRY SIGNAL

摘要

PROBLEM TO BE SOLVED: To provide methods and apparatus for Cheyne-Stokes respiration ("CSR") detection based on a blood gas measurement such as oximetry.SOLUTION: A duration, such as a mean duration of contiguous periods of changing saturation or re-saturation occurring in an epoch taken from a processed oximetry signal, is determined. An occurrence of CSR may be detected from a comparison of the duration and a threshold derived to differentiate saturation changes due to CSR respiration and saturation changes due to obstructive sleep apnea. The threshold is a discriminant function derived as a classifier by an automated training method. The discriminant function is further implemented to characterize the epoch for CSR based on a frequency analysis of the oximetry data. Distance from the discriminant function is utilized to generate probability values for the CSR detection.