Channels

The channels available for display in the device include:

• Photoplethysmogram (PPG)
  • Airflow*
  • Respiratory Effort*
  • Heart Rate Variability (HRV)
• Saturation of Peripheral Oxygen (SpO2)
• Pulse Rate
• Actigraphy
• Position
• Acoustic Flow**
• Snore**

*Surrogate signals extracted from the third-party device input signals.
**From Celeste+

Study Scoring

The autoscoring algorithm is based directly on the recommendations of the American Academy of Sleep Medicine (AASM) Manual for the Scoring of Sleep and Associated Events designed to guide sleep study professionals through the technical aspects of sleep testing. The scoring results should be reviewed and edited as necessary.

The device identifies the following physiological events based on AASM guidelines:

• Apnea-Hypopnea Index (eAHI)
• Respiratory Disturbance Index (eRDI)
• Respiratory Events (Apneas or Hypopneas): Obstructive, Central, Respiratory Effort-Related Arousals (RERA)
• Sleep-Wake Events: Wake, Light Sleep, Deep Sleep, REM
• Arousals
• Total Sleep Time (TST)
• Total Recording Time
• Sleep Efficiency (SE)
• Sleep Latency (SL)
• Wake After Sleep Onset (WASO)
• Desaturation: Count, Index per Hour
• SpO2 / Oxygen Saturation: Minimum, Maximum, Mean, Percent of Time in Range
• Heart Rate: Minimum, Maximum, Mean, Variability, Percent of Time in Range

Advanced Metrics

The following are advanced metrics provided by the device that are for informational purposes only. The advanced metrics are based on the indicated peer-reviewed, published literature.

Desaturation: Hypoxic Burden

Azarbarzin, A. et al. The hypoxic burden of sleep apnoea predicts cardiovascular disease-related mortality: the Osteoporotic Fractures in Men Study and the Sleep Heart Health Study. Eur. Hear. J. 40, 1149–1157 (2018).

Heart Rate: Variability

Blanchard, M. et al. Association of Nocturnal Hypoxemia and Pulse Rate Variability with Incident Atrial Fibrillation in Patients Investigated for Obstructive Sleep Apnea. Ann. Am. Thorac. Soc. 18, 1043–1051 (2021).