To establish high-risk criteria for early detection of congenital sensorinenural hearing loss, the
study was carried out. Definition of "congenital hearing loss" in this study is hearing impairment
diagnosed within infantile period with no definite clinical cause nor onset of disease after brith.
Life histories of 400 children with congenital sensorineural hearing loss and of 2500 children without
any problem of hearing were investigated in terms of familial and clinical problems until one year
of age. 63 items were explored. In the hearing loss group, positive rates of the following items
appeared statistically higher than in the control group; 1) family history of hearing loss with
unknown origin, 2) bloodrelated parents, 3) malformation or congenital abnormality except
hearing loss, 4) history of induced abortion, 5). rubella or influenza during the first half of pregnan-
cy, 6) daily drinking in pregnancy, 7) fetoplacental disfunction, 8) birth weight less than 2500g, 9)
assistance of incubator, 10) neonatal distress, 11) pollusion of amniotic fluid, 12) severe neonatal
jaundice, 13) febrile disease during one year of age. Through consideration of literature, most of
these items seemed to be related to congenital sensorineural hearing loss.
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