Overnight analysis metrics

The analysis panel turns a night of raw samples into the metrics clinicians use to describe overnight oxygenation.

Respiratory events

• ODI-3% / ODI-4% — the oxygen desaturation index: how many times per hour your SpO₂ dropped by at least 3% (or 4%) from baseline. Higher means more fragmented oxygenation.
• Event counts — the raw number of qualifying desaturations across the night.
• Severity badges — a quick normal / mild / moderate / severe banding of the ODI.

SpO₂

• Min and Mean SpO₂ across the night.
• Time below 90% / 88% — minutes spent under each clinically meaningful threshold.
• Burden per hour — desaturation load normalised to recording time.

Heart rate

Mean, min, max, and variability (standard deviation) sit alongside CVHR and the HR-to-SpO₂ coupling — explained in heart rate and CVHR.