Pilot-trial Testing Remote Sleep Apnea Evaluation in Patients with Atrial Fibrillation

The NightOwl™ system consists of a small sensor device which is placed on the fingertip and a smartphone app that is connected to an encrypted cloud-based analytics platform within the European Union, the NightOwl™ software. The sensor is self-applied by attaching the sensor to the fingertip by means of an adhesive patch. The NightOwl™ sensor acquires accelerometer data and reflectance-based photoplethysmography (PPG) from which it derives actigraphy (sleep/wake behavior), SpO2, peripheral artery tone (PAT) and pulse rate, among other features. A PAT analysis derives changes in caliber of arteries elicited by alterations in the contractile activity of vascular smooth muscle and are referred to as changes in arterial tone. The end state of the apnea-hypopnea events are associated with sympathetic activation.