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Original Article

Diagnostic and Prognostic Significance of So-Called Direct Bone Conduction in Otospongiosis1

Pages 381-386 | Received 11 Dec 1984, Accepted 02 May 1985, Published online: 07 Jul 2009
 

Abstract

The modified Pohlman sound probe was used to provide a prognostic evaluation of the results of surgery in otospongiosis by means of transtympanic exploration. Based on the reactions obtained with this probe, it is possible to recognize theoretically the degree of cochlear involvement ‘direct bone conduction coefficient’ and to indicate which component of the hearing defect - conductive or perceptive - prevails in a given case of otospongiosis.

Sur la base de travaux antérieurs concernant la conduction osseuse et la mise en œuvre de la sonde de Pohlman, nous avons élaboré une méthode d'observation de la conduction osseuse directe dans l'otospongiose. Les mesures peuvent ětre faites à l'aide d'une tympanoponction ou tympanotomie pendant la stapédectomie. Nous avons constaté que les résultats obtenus à l'aide de la sonde peuvent constituer une indication sur les résultats probables d'une stapédectomie. Cette méthode permet théroriquement de prévoir si chez le malade il y a une prépondérance de transmission ou de perception.

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