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At least 91 records · Page 5Linked to original sources
PubMed1985

Aetiology of hearing disorders in children at the schools for the deaf.

Ninety-three children attending the schools for the deaf in Copenhagen were examined in order to assess the aetiology of the hearing disorder and to compare the causing factors to those indicated in a previous investigation from 1953. Based on pre-existing investigations including both audiological and non-audiological procedures, the aetiology of the hearing impairment was known in 63% while in 37% the cause of the hearing disorder was unknown. A thorough examination programme was performed in 71 of the attending children whereby a reduction of 'unknown cause' of the hearing disorder could be obtained in half of these children. Compared to the previous investigation from 1953 the incidence of acquired hearing impairment had decreased in contrast to congenital severe hearing impairment. Based on the results of the present investigation it is concluded that an improved nosological classification can be obtained by re-evaluation of both the children and the parents; the physical examination is a long-standing dynamic process running over years; the increased incidence of congenital hearing impairment can be ascribed to prenatal infections, predominantly foetal rubella which is a preventative disease.

Adolescent↗
PubMed1989

[Personal experience with the difference limen in interrupted tones in differentiating between sensorineural and supracochlear hearing disorders].

The authors assessed the differences of the limen of interrupted sounds (sounds which last 500 ms, between which there are intervals of 200 ms) in healthy subjects and in patients with sensory neural and supracochlear hearing disorders. Essentially the results are consistent with those of Schorn and Fastl (2) and they suggest that patients with supracochlear hearing disorders are able to differentiate only much greater differences in intensity (more than 4 dB) between sounds, as compared with patients with sensory neural hearing disorders.

Audiometry↗
PubMed1993

[Hearing disorders in childhood].

Hearing impairment in children may severely affect language acquisition. Therefore, early identification and expedient auditory rehabilitation is important. Hearing impairment should be diagnosed within the first year of life. Unfortunately, hearing handicap is still recognized at an average age of two years. In 70% of the cases, the hearing impairment is first suspected by the parents. The hearing of children at risk should be assessed using systematic screening programs. Parents who suspect that their child is hearing impaired must be taken seriously, and a thorough pedaudiologic evaluation is necessary. The principles of auditory rehabilitation are outlined.

Auditory Threshold↗
PubMed2004

[Epidemiological aspects of hearing disorders in working population in the Central Federal District].

The study was made of demographic indices, prevalence, severity and diagnostic forms of hearing disorders in working subjects living in the territory of three districts of the Central Federal Region (CFR) with a population of more than 3.5 ml. Demographic situation in the CFR is regressive, i.e. its population is decreasing. More than a half (51.8%) of all deaf and hypoacusis patients living in the territory studied were of the productive age, 68.9% were over 40 years of age. Hearing disorders were represented by neurosensory hypoacusis (48.0%), mixed forms (30.7%), conductive hypoacusis and deafness (18.7%). The studied population with hypoacusis had hearing loss of the degree I-II, III and IV in 64.6, 22.8 and 6.5% cases, respectively 6.1% were deaf.

Adolescent↗
PubMed1999

Neonatal screening for hearing disorders in infants at risk: incidence, risk factors, and follow-up.

OBJECTIVE: To determine the incidence and risk factors for hearing disorders in a selected group of neonates and the feasibility of selective hearing screening. SETTINGS: Multicenter prospective trial at five centers in Germany. METHODS: Enrollment criteria: in addition to previously defined risk factors by the Joint Committee on Infant Hearing (family history of hearing loss, in utero infections, craniofacial anomalies, birth weight <1500 g, critical hyperbilirubinemia, ototoxic medications, bacterial meningitis, postnatal asphyxia, mechanical ventilation >5 days, stigmata, or syndromes associated with hearing loss), the impact of maternal drug abuse, birth weight <10th percentile, persistent pulmonary hypertension, and intracranial hemorrhage more than or equal to grade III or periventricular leukomalacia on infant hearing were evaluated. The screening procedure was performed by automated auditory brainstem response (A-ABR; ALGO 1-plus; Natus Med Inc, San Carlos, CA). STATISTICS: univariate analyses of risk factors versus A-ABR results and a multivariate regression analysis were used; additionally, the total test time was recorded. RESULTS: Seven hundred seventy recordings from 777 infants enrolled consecutively constitute the basis of this analysis. Mean gestational age was 33.8 +/- 4.3 weeks, birth weight 2141 +/- 968 g; 431 infants being male and 339 female; 41 (5.3%) infants exhibited pathologic A-ABR results (16 bilateral and 25 unilateral). Meningitis or sepsis, craniofacial malformations, and familial hearing loss were independent significant risk factors. Median total test time was 25 minutes. Follow-up examinations in 31 infants revealed persistent hearing loss in 18 infants (13 infants sensorineural, 5 from mixed disorders), 7 requiring amplification. CONCLUSION: Hearing screening in high-risk neonates revealed a total of 5% of infants with pathologic A-ABR (bilateral 2%). Significant risk factors were familial hearing loss, bacterial infections, and craniofacial abnormalities. Other perinatal complications did not significantly influence screening results indicating improved perinatal handling in a neonatal population at risk for hearing disorders.

Analysis of Variance↗