Hearing loss in 7 to 11 years old school boys of Mashhad without recognized ear problems: 2006

The aim of this research was to determine the prevalence of hearing impairments and its associations with different ear problems among schoolboys in Mashhad, Iran. In this cross sectional research, a representative sample of 1047 schoolboys [between age group 7 to 11 years] was subjected to diapason tests, Otoscopic examination and questionnaire. Then in the next step, suspected cases were visited by an Ear, Nose and Throat [ENT] specialist and subjected to Pure Tone Audiometry [PTA]. Data analysis identified 29 children with hearing impairment [72.1% mild, 20.9% moderate, and 2.3% severe and4.7% profound] making a prevalence of 2.76% [60.4% conductive, 27.9% sensorineural and 11.7% mixed hearing impairment].Data analysis revealed ear problems with the following prevalence's: ear wax [13.7%], otalgia [11%], ear trauma [5.3%] and ear washing [3.6%]. The prevalence of hearing impairment was comparable to that in developed countries, but was better than that in developing countries

[Categorize auditory performance in 53 cases using cochlear implants]

The aim of this study is determine the auditory performance of congenitally deaf children following cochlear implantation and comparisons of auditory performance before and after cochlear implantation. This is a prospective study of 53 children having been implanted in khorasan center, and followed for 5 years. All children are aged less than 8 years at the time of implantation the mean of age at implantation is 42 months. Auditory performance is assessed by using the Categories of Auditory Performance scale [CAP]. Prelingually deaf children showed significant improvement in the auditory performance with implant experience. Six-month after implantation 91% of children could rassed to speech sound 96% could discriminate speech sounds at the 12 month interval. 80% of children who reaches the three year interval could understand common phrases without lip reading. These results indicate the ability of cochlear implants to provide significant auditory skills for young congenital deaf children

Hearing loss in hemodialysis patients

Inner ear cells are sensitive to some metabolic and hormonal disorders, but the relation between chronic renal failure [CRF], regular dialysis treatment [RDT] and sensorineural hearing loss [SNHL] is still a debatable field. The object of this paper was to verify the presence of SNHL in patients submitted to hemodialysis with different duration due to CRF and in those submitted to conservative treatments compared to normal controls. Sixteen chronic renal failure patients, thirty CRF patients with different duration of hemodialysis [14 cases less than 5 years, 9 cases between 5 to 10 years and 7 cases more than 10 years] and sixteen controls were studied according to clinical exam, pure tone audiometry and immitanciometry. The hearing acuity in the CRF groups compared to the normal group showed impairment, mainly in 4 and 8 kHz. There was no statistically significant difference in hearing acuity between CRF patients on RDT and those with conservative management