The aim of the study is to find, using validated and efficient tools, a laryngopharyngeal reflux in patients receiving polysomnography for suspected obstructive sleep apnea syndrome.

It is proposed to carry out simultaneously, at the Sleep Center of the Polyclinique of Poitiers (CSPP), a polysomnography, a 24-hour Restech pharyngeal pH-metry (day and night), a Peptest (in the evening and in the morning of the polysomnography), with the RSS-12 questionnaire and the RSA score.

Inclusion Criteria:

• Adults (> 18 ans)
• Polysomnography planned for OSA assessment
• RPL known or not, suspected or not
• Affiliation to a social security scheme or beneficiary of such a scheme
• Patient having signed the free and informed consent

Exclusion Criteria:

• Minors
• Smoking, alcoholism, chronic or serious disabling pathology
• Medical history of upper aerodigestive tract cancer, radiotherapy
• Recent infection of upper aerodigestive tract, chronic rhinosinusitis
• Permanent nasal obstruction
• Active allergy
• Non-obstructive SAS (central)
• Patient under anti-secretory treatment (IPP) during the 8 days preceding the Restech associated with the PSG
• Refusal to participate in the study
• Protected patients: Adults under guardianship, guardianship or other legal protection, deprived of liberty by judicial or administrative decision
• Pregnant, breastfeeding or parturient
• Hospitalized without consent