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Original Article

Auditory Brainstem Evoked Potentials in Blast Injury

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Pages 297-304 | Received 31 Oct 1984, Accepted 21 Feb 1985, Published online: 07 Jul 2009
 

Abstract

Blast injury typically consists of a mixed conductive and sensorineural hearing loss. The sensorineural component includes temporary as well as permanent threshold elevations. Auditory brainstem evoked potentials (ABEP) are sensitive to functional changes in various levels along the auditory pathway. ABEP were recorded from 37 survivors of blasts and latency measures were correlated with clinical findings. Prolongation of peak latencies was correlated with the conductive component of blast-induced hearing loss, as well as with the TTS component of the sensorineural impairment. No central effects of blast on the auditory system were detected. In addition to their objectivity, ABEP hold the promise of differentiating between the permanent and temporary effects of blast on hearing.

Potentiels évoqués auditifs du tronc cérébral dans les atteintes par explosion

Les atteintes par explosion consistent classiquement en des pertes auditives mixtes de transmission et de perception. La part de perception comprend des élévations de seuil temporaires et permanentes. Les potentiels évoqués auditifs du tronc cérébral (PEATC) sont sensi-bles aux modifications fonctionnelles dans les différents niveaux de la voie auditive. Les PEATC furent enregistrés chez 37 survivants ‘explosions et les corrélations entre les mesures de latence et les données cliniques furent étudiées. II y eut une corrélation entre’ augmentation de la latence des pics et la part de perte par transmission amenée par ‘explosion, aussi bien’ avec les élévations temporaires des seuils dus à ‘atteinte neurosensorielle. On’ a pas détecté'effet des explosions sur le système auditif central. Outre leur objectivité, les PEATC devraient permettre de différencier les efifets temporaires et permanents des explosions sur'audition.

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