Background: Exercise-induced laryngeal obstruction (EILO) is an exercise-dependent dyspnoea, linked to a laryngeal closure during physical effort. It may concern from 5% to 7% of adolescents and young athletic adults. EILO is a quite recently described condition: standardized diagnostic criteria and consensual management are still to come. Formal diagnosis of EILO requires a continuous laryngoscopy during exercise (CLE). This test allows visualization of laryngeal abnormalities during an effort but is only accessible in specialized centres.
Aims: We wanted to assess performance of a simplified CLE (sCLE) procedure for EILO diagnosis in everyday practice.
Material and methods: The procedure consisted in a continuous flexible videolaryngoscopy during a cycloergometre cardio-pulmonary exercise test. Screening questionnaire and visual scoring of laryngeal abnormalities were performed. Patients clinically suspected of EILO were included from 2018 to 2020.
Results: Seventeen consecutive subjects had an indication for sCLE. Fifteen patients underwent sCLE, and EILO-linked significative abnormalities were observed in 80% of them, thus confirming the diagnosis.
Conclusions: CLE can be done successfully in a simple way. Due to its simplicity, tolerance and contribution in EILO diagnosis, this simplified version of CLE may promote its widespread use in ENT and pulmonology practices, as an affordable confirmation test.
Keywords: EILO; Exercise-induced laryngeal obstruction; athletes; exercise dyspnoea; laryngoscopy; larynx pathology.