P036 Rapid oscillatory ventilation seen during positive airway pressure titration studies: A case series

Abstract We have observed a phenomenon in some patients undergoing positive airway pressure implement/titration studies our sleep lab, characterised by periods of extremely high respiratory rates up to 80 breaths/min which appear be device triggered. These episodes occur during central apnoea and last 1.5-2.0 minutes. A possible related has been reported case series 4 published the Journal Clinical Sleep Medicine 2018 (Gupta et al), however this was using different CPAP were significantly lower than what we observed. Apart from this, there are no reports literature that consistent with observations made lab. Correspondence vendor suggested due rare state motor control system maintains correct mask circuit may influenced lab not vendor’s proprietary heated tubing system. In addition, incidence rate is said low at 0.00087%, although already least 5 cases 6 months August 2021 February 2022. Our objective present inform broader community unique observations.