Audiological Assessment of Eleven Congenital Hypothyroid Infants Before and After Treatment

M. François ORL Department, Hôpital Robert Debré Faculty Bichat, University Paris VII, France

P. Bonfils ORL Department, Hôpital Robert Debré Faculty Bichat, University Paris VII, France; ORL Department, Faculty Necker, Hôpital Boucicaut, University Paris V, France

J. Leger Department of Endocrinology, Faculty Saint-Louis Lariboisière, Hôpital Robert Debré, University Paris VII, France

P. Avan ORL Department, Faculty Necker, Hôpital Boucicaut, University Paris V, France

P. Czernichow Department of Endocrinology, Faculty Saint-Louis Lariboisière, Hôpital Robert Debré, University Paris VII, France

P. Narcy ORL Department, Hôpital Robert Debré Faculty Bichat, University Paris VII, France

Abstract

Eleven congential hypothyroid newborns were consecutively referred for audiological evaluation before any treatment. Evoked otoacoustic emissions were present bilaterally in 9 newborns. These results suggest the normality of outer hair cells and contrast with results obtained in experimental studies. The auditory brainstem responses in 6 newborns showed a prolonged wave I, as previously reported by other authors. At 9 to 12 months of age, all children treated had evoked otoacoustic emissions in at least one ear. In 9 cases, the auditory threshold was normal (equal to or below 20 dB) as determined by behavioural tests.

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Audiological Assessment of Eleven Congenital Hypothyroid Infants Before and After Treatment

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