Causes of hearing impairment in deaf pupils with a mental handicap

Are the health needs of children with disabilities being met at primary schools?

The aim of this study was to provide current information about the health profile and needs of mainstreamed primary school children with disabilities and special educational needs during their school hours. The Study population is composed of students with special educational needs and disabilities attending mainstream primary schools located in three selected Turkish districts with low, moderate, and high socioeconomic status and literacy rates separately. Parents of 404 students from 72 primary schools constituted the research sample. The study showed that 13.4% of the students with disabilities had chronic illnesses and 8.9% had health problems requiring access to emergency medical care when the condition recurs (such as epileptic seizures, fainting, or falling). Of the students with disabilities, 39.9% usually or sometimes needed medical care during school hours in the previous week. Health needs of nearly half of the students with disabilities were met at school. Special health needs and risks of children with disabilities also continue at school along with other possible health concerns.

Syndromic etiology in children at schools for the deaf in Turkey

OBJECTIVE

The aim of this study was to determine the syndromic etiology of bilateral severe sensorineural hearing disorders in children and current etiological causes to reduce the cases in the unknown group.

METHODS

This study was conducted on 550 students of five schools for the deaf in Istanbul and Zonguldak, Turkey. Otologic, audiologic, dysmorphologic, ophthalmologic and dental examinations were performed in all children. Familial and medical histories were obtained.

RESULTS

The etiology of hearing loss was genetic in 346 (62.90%), acquired in 107 (19.45%) and unknown in 97 (%17.63) cases. A total of 619 malformations were defined in 550 children and 99 of them belonged to a syndrome. We identified 33 different syndromes for these 99 syndromic children. Syndromic etiology was found in 18.0% of the total and 28.61% of the subjects with genetic etiology. Most common syndrome was Waardenburg syndrome which occurred in 33 children.

CONCLUSION

The incidence of hereditary hearing impairment is very high in developing countries compared to developed countries. Prevention is essential to reduce the incidence, multidisciplinary approach and genetic counselling are necessary in this regard.

Changes in the aetiology of hearing impairment in deaf-blind pupils and deaf infant pupils at an institute for the deaf

An aetiological study was performed on 57 pupils at the deaf-blind department of the Institute for the Deaf at Sint-Michielsgestel, The Netherlands, in the school year 1998-1999 and on 49 deaf-blind pupils at the same department in the school year 1986-1987. The pupils were 5-20 years of age. In addition, the aetiologies were studied in 55 deaf infant pupils in 1998 and compared with those of 68 deaf infant pupils in 1988. Their age was 1-5 years. All the pupils showed hearing impairment with thresholds of >60 dB HL. Among the deaf-blind pupils and deaf infant pupils, there were several cases with rare hereditary syndromes. The prevalence of acquired causes of deafness, especially congenital rubella, had decreased over the years, whereas perinatal causes of deafness had increased. Chromosomal anomalies were found in 15% of the infant pupils in 1998. Over the study period, the percentage of pupils with multiple handicaps increased from 25 to 38%.