International Session 28　　 Miscellaneous

ETBD is performed in chronic otitis media with effusion(COME)assuming it is secondary to obstructive cartilaginous ET dysfunction.This was supported by tympanometry and pure tone audiometry but the ET function was not assessed specifically.The aim is to describe the ET function before and after ETBD using Sonotubometry.Methods: Sonotubometry was performed in children aged 5-12 years old who had undergone ETBD for COME before and at 6 weeks after ETBD.Results: 11 children had undergone ETBD.Their pure tone average had improved at an average of 12 709 14 dB and 11 4010 96 dB for right and left ears.The number of active Eustachian tube openings measured using Sonotubometry also had increased at an average of 4 254 44 and 2 902 79 for right and left ears.The improvement in pure tone average and sonotubometry were statistically significant.Conclusion: COME secondary to obstructive cartilaginous ET dysfunction will be benefited from ETBD in the absence of bony ET dysfunction.It is advisable to wait for 6 months for complete healing and fibrosis before repeating ETBD for persistent OME.