Dosage Regimens of Intranasal Aerosolized Surfactant on Otitis Media with Effusion in an Animal Model

Abstract

To determine optimal dosage regimens of intranasal metered dose aerosolized surfactant with and without other medications in the treatment of otitis media with effusion (OME). Resolution of experimental OME in gerbils was determined based on otomicroscopy and tympanometry. Experimental intranasal drugs were: surfactant, surfactant with betamethasone, surfactant with phenylephrine, and a normal saline solution placebo. Medications were administered once or twice daily via a metered dose inhaler. For twice-daily dosing, mean days to OME resolution were 8.5 for the aerosolized surfactant, 6.3 for the surfactant with betamethasone, 18.7 for the surfactant with phenylephrine, and 16 each for control and placebo. Resolution with the once-daily dosage was longer for all conditions. Results were comparable using tympanometry. OME resolved faster than the natural course when treated with intranasal surfactant with and without steroids. Twice-daily dosing was statistically superior. This study reiterates the effectiveness of OME treatment with an aerosolized synthetic surfactant with and without steroids and establishes a superior twice-daily dosage schedule.