Related Experiment Video
Updated: Mar 24, 2026

Simultaneous Laryngopharyngeal and Conventional Esophageal pH Monitoring
Published on: December 14, 2020
Correlation of obstructive sleep apnoea and laryngopharyngeal reflux: phmetry study
D M Elhennawi1, M R Ahmed1, A S Abou-Halawa1
1Department of Otorhinolaryngology, Faculty of medicine, Suez Canal University, Ismailia, Egypt.
Objective:
To study the correlation of obstructive sleep apnoea (OSA) and laryngopharyngeal reflux (LPR).
Design:
A descriptive study.
Setting:
Suez Canal University Hospital, Ismailia, Egypt.
Patients:
62 patients with polysomnography confirmed OSA.
Intervention:
Patients were evaluated with ambulatory 24-h double channel pH monitoring.
Results:
Mean reflux symptom index in the study group was 9 ± 5.5, and it was > 13 in all patients with severe OSA. Signs of LPR reflux were present in 34 (55%) patients. Abnormal reflux was detected in the distal oesophagus in 41 patients (66%) and in the proximal oesophagus in 21 patients (34%). Patients with severe OSA had significantly higher nocturnal LPR reflux episodes compared to patients with mild disease (P < .05). Number of reflux episodes and total duration of reflux during sleep are significantly correlated to degree of OSA (P < .05). No difference was found in relation to age or sex. Daytime reflux was not related to the degree of obstructive sleep apnoea (P > .05).
Conclusion:
LPR is common in patients with OSA. Patients with severe OSA have significantly higher nocturnal LPR. This should be considered when treating this group of patients.
Related Concept Videos
Gastroesophageal Reflux Disease II: Clinical Features and Management
Clinical Manifestations
GERD presents itself in a multitude of ways, with symptoms varying from person to person. The hallmark symptoms are...
Sleep Apnea
The condition is more prevalent among...
Gastroesophageal Reflux Disease I: Meaning and Pathophysiology
Chronic Pharyngitis
Etiology
It often arises from persistent viral or bacterial infections affecting sinuses and tonsils.
Additional contributing factors include inadequate dental hygiene, mouth breathing, recurring tonsillitis, allergic rhinitis, laryngopharyngeal reflux, and exposure to smoke, chemicals, and other environmental pollutants. Allergic reactions to pollen, mold, and pet dander, chronic cough, excessive voice usage,...
Chronic Obstructive Pulmonary Disease-IV: Assessement and Diagnostic Studies
Medical History
Assessment of Airway, Skin Color, and Use of Accessory Muscles
Introduction
The initial evaluation of a patient's respiratory system...

