Belun Ring Platform With an Improved Algorithm for OSA Assessment

Inclusion Criteria: * Provision of signed and dated informed consent form. * Age 18-80 * Clinically assessed and suspicious for OSA Exclusion Criteria: * Full night PAP titration study * On home O2, noninvasive ventilator, diaphragmatic pacing, or any form of nerve stimulator * Having atrial fibrillation-flutter, pacemaker/defibrillator, LVEF \< 55%, left ventricular assist device (LVAD), or status post cardiac transplantation * Patients taking narcotics * Recent hospitalization or recent surgery in the past 30 days * Unstable cardiopulmonary status on the night of the study judged to be unsafe for sleep study by the sleep tech and/or the on-call sleep physician An individual who meets the above criteria but fails to have at least 4 hours of technically valid sleep based on BLS-100 in a diagnostic study or at least 3 hours of technically valid sleep during the diagnostic portion of a split night study will be excluded from statistical analyses.