The primary aim of this study is to validate the performance of Sleepiz One+ for the measurement of vital physiological parameters in adult population, against a laboratory-based polysomnography. Additionally, the investigators will evaluate Sleepiz One+ ability to identify patients with a high risk of suffering from a sleep-related breathing disorder based on apnea-hypopnea index estimation. Participants will undergo measurement with Sleepiz One+ and a polysomnography device while resting in bed for 20 min as well as during sleep for the duration of the following night.

Inclusion Criteria:

• Age >18years
• Ability and consent to undergo electrophysiological routine assessment
• Informed Consent as documented by signature
• Patients diagnosed or suspected to suffer from sleep apnea or any other sleep related disorder or patients suffering from chronic cardiac, respiratory or neuromuscular disorders
• Ambulatory or stationary patients of Klinik Lengg

Exclusion Criteria:

• Previous enrolment into the current study,
• Enrolment of the investigator, his/her family members, employees and other dependent persons
• Cardiac pacemaker or another implanted electrical device
• Women who are pregnant
• Inability to follow the procedures of the study, e.g. due to language problems, psychological disorders, dementia, delirium etc. of the participant