Video-fiberoscopy is the exploration of upper respiratory airways used in our diagnostic protocol in patients with chronic snoring and obstructive sleep apnea syndrome (OSAS). We perform a fibroscopy during propofol induced sleep without tracheal intubation; video recording and monitoring of level of sleep, pulse oximetry, blood pressure, ECG, etc. is used. This exploration allows us to asses upper respiratory airways when the patient is asleep as well as the areas of collepse and vibration both from a functional and anatomical points of view.