The outcomes from introducing continuous laryngoscopy during exertion (CLE) to an exertional dyspnoea cardiopulmonary exercise testing (CPET) service.

<bold>Background:</bold> The Birmingham Heartlands Hospital CPET service introduced a 'suspected exercise-induced laryngeal obstruction (EILO)' clinic in April 2022. The clinic consists of a speech and language therapist and clinical scientist. Referral criteria: normal pulmonary function tests and symptoms of dyspnoea on exertion. Patients are examined at baseline via laryngoscopy to identify inducible laryngeal obstruction (ILO). CPET is then performed, followed by CLE at 90% of the maximal workload. <bold>Aim:</bold> To analyse the outcomes from the clinic and demonstrate the value of both CPET and CLE. <bold>Methods:</bold> Retrospective analysis of clinic outcomes, comparing CPET and CLE. Demographic data are mean ± SD. <bold>Results:</bold> Up to Dec 2023, there were 34 patients referred [53% female; age = 43.7 ± 13.7 years, BMI = 26.7 ± 4.1 kg/m²]. Fig. 1 is the flow of patients, differentiated by the specialty of referral. CPET was not conducted in 6 cases: 3 with severe ILO/vocal cord palsy at baseline, 2 unable to maintain cadence, and 1 exceeding the bike weight limit. 6 declined assessment. Discussion: CPET was performed in 22 cases with breathing pattern disorders (BPD) and deconditioning as the most common cause of dyspnoea. In 18 cases, CPET and laryngoscopy helped to identify cause of dyspnoea and guide appropriate management; 4 of which would have been classed as normal or supranormal by CPET alone. <fig><object-id>erj;64/suppl_68/OA4594/F1</object-id><object-id>F1</object-id><object-id>F1</object-id><graphic></graphic></fig>