A Prospective Study to Evaluate the WP in Comparison to PSG in Patients Suspected of Sleep Disorders

Inclusion Criteria: * Age between 12-99 * Subjects that are able to read understand and sign the informed consent form of the study or by parents of subjects that are less than 18 years of age that are referred to undergo an overnight sleep study in the clinical sleep laboratory * Subjects suspected of having sleep disorders or with comorbidities relevant to central sleep apnea. Exclusion Criteria: * Permanent pacemaker: atrial pacing or VVI without sinus rhythm. * Finger deformity that precludes adequate sensor appliance.