288
Abstracts
9. Hearing level of otitis media with effusion in children with Down’s syndrome Shigeko Harigai, Yosisato Tanaka, Yukiko Iino Department of Otolaryngology, Teikyo University School of Medicine, Japan The high prevalence of sensory neural and conductive hearing loss in children with Down’s Syndrome is widely recognized and otitis media with effusion is well known as the commonest cause of conductive hearing loss. We investigated the hearing level and changes of the level before and after the treatment of OME in 50 (11 months to 15 years) children with Down’s Syndrome. According to the ages at their first visits, the 50 subjects were divided into three groups, O-3 years (21), 3-6 years (22) and over 6 years (7). For their OME, they were treated with medication and minor surgeries, such as myringotomy or insertion of ventilation tubes. The mean hearing level in the speech ranges (0.5-2 kHz) at their first visits was 59 dB, and little differences were found between the groups. After the above-mentioned treatments, we observed an improvement in the hearing loss in all groups up to the mean hearing level of 32 dB. The best improvements in the hearing level were observed at around 3 years of age, and around 6 years of age. At the age of 3 years, the mental developments of Down’s syndrome children were most progressive, and at around 6 years, physical development was progressive. We concluded that earlier detection of OME and appropriate treatment before 3 years of age would lead to desirable mental as well as physical developments of Down’s Syndrome children.
10. Recognition of previously undiagnosed moderate hearing loss during an episode of otitis media with effusion Fumiko Shishiyama, Nobuaki Tsuchihashi, Nobuko ENT Department of National Children’s Hospital
Kawashiro
Between 1991 and 1995, we examined five patients, in whom impaired hearing, due not only to otitis media with effusion (OME), but also pre-existing moderate hearing loss (MHL) were recognized. All five were treated by means of ventilatory tube insertion into the tympanic cavity. The use of hearing aids was also introduced. These children ranged in age from 4 to 3 years, with an average of 6 years. They were, therefore, older at the time of diagnosis than most cases with severe hearing loss. These hearing losses had gone unrecognized due to their moderate degree. in these cases, an episode of OME further decreased the hearing level, facilitating the diagnosis of MHL. Two of the five patients had been low birth weight infants with perinatal abnormalities, one had hydrocephalus with multiple anomalies and one had CHARGE association. All four had manifested delayed speech, which had been attributed to mental retardation. Failure to maintain a high index of suspicion for MHL, resulted in delayed diagnosis and inappropriate management.