The Night Owl is a disposable device that collects data to calculate the Apnea-Hypopnea Index (AHI), which measures how many times per hour breathing is partially or completely blocked during sleep. The AHI is critical for diagnosing the severity of obstructive sleep apnea (OSA) and determining the right treatment. The Night Owl is FDA-cleared to monitor sleep apnea at home. It’s designed for people 13 and older, offering clinical-level data collection while sleeping in a natural environment.

Compact, Lightweight Finger Sensor

The device uses a fingertip sensor that weighs less than an ounce and doesn’t require wristbands or chest belts. It stays securely in place using a comfortable adhesive strap, reducing the risk of sleep disruption and making it easier to complete multi-night testing.

Multi-Night Testing Capability

Night Owl allows for testing over multiple nights to account for variations in sleep patterns. By collecting data across several nights, it helps prevent false negatives that can occur with single-night tests and provides a more accurate representation of apnea severity.

Actigraphy for Sleep and Movement Tracking

An integrated accelerometer monitors actigraphy (body movements) throughout the night to help identify sleep and wake periods. This provides essential context for interpreting oxygen desaturation events and determining accurate Apnea-Hypopnea Index (AHI) scores.

Photoplethysmography (PPG) to Monitor Oxygen Levels

Night Owl uses PPG technology to continuously measure blood oxygen saturation. Drops in oxygen levels are a key indicator of apnea events, making this measurement essential for accurate diagnosis.

Peripheral Arterial Tone (PAT) Analysis

The device measures changes in peripheral arterial tone to detect autonomic nervous system responses to apnea events, such as variations in heart rate and blood pressure. This allows Night Owl to identify apneas even in the absence of major body movements or obvious desaturation events.