APNEA-HYPOPNEA INDEX (AHI): Quantifies total episodes of complete cessation (apnea) and partial collapse (hypopnea) of breathing per hour of sleep to categorize sleep apnea severity (mild, moderate, severe).

CONTINUOUS PULSE OXIMETRY (SpO2 & ODI): Real-time nocturnal blood oxygen saturation tracking and Oxygen Desaturation Index (ODI) measurement to identify dangerous nocturnal drops in oxygen levels.

RESPIRATORY EFFORT & NASAL AIRFLOW: Monitors inspiratory flow and chest/abdominal wall movement via inductive plethysmography bands and nasal pressure cannula to distinguish obstructive from central sleep apnea.

SNORING ACOUSTICS & BODY POSITION SENSING: Records decibel frequency of snoring alongside positional sensors to evaluate positional sleep apnea (supine vs. lateral sleeping posture effects).

HEART RATE & PULSE RATE VARIABILITY: Continuous nocturnal heart tracking to observe sympathetic nervous system surges, tachycardia episodes, and sleep fragmentation triggers.