Long-Term Middle Ear Ventilation in Otitis Media with Effusion in Children.

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The results of long-term middle ear ventilation with a Koken tube (wide flange, A type) were retrospectively analyzed chiefly with respect to complications in 43 ears with otitis media with effusion in children aged 3 to 9 years. The average intubation period was 11 months.The average pure tone air conduction threshold showed remarkable improvement from 34.5 dBHL to 15.9 dBHL. Otorrhea, extrusion and obstruction of the tube were observed in 8 ears (18.6%), 9 ears (20.9%) and 3 ears (7.0%), respectively. No cholesteatoma or granuloma were seen. The ear drum perforation failed to close in 4 of 36 ears (11.1%) followed for more than 6 months after extrusion or removal of the tubes. Scarring of the ear drum was observed in 4 ears (12.5%). Recurrence of otitis media with effusion was seen in 15 of 32 ears (46.9%), in which the ear drum perforation was closed after extrusion or removal of the tubes.The present results indicate that the Koken tube (A type) is one of the best tubes for long-term middle ear ventilation.
耳鼻咽喉科臨床学会の論文