[Acoustic distorsion products. A systematic analysis of technical parameters. How to explain the results?]. / Les produits de distorsion acoustique. Analyse systématique des paramètres techniques. Comment interpréter les résultats?

The aim of this study was to define the most interesting parameters useful for a clinical application of acoustic distortion products (mainly, F1 and F2 primaries frequencies and levels). The most interesting F1 and F2 primaries level in order to separate subjects with a normally-hearing function and patients with a sensorineural hearing loss is 50 dBHL. This result can be explained by some physiological properties of cochlear mechanisms.

[Analysis of cochlear manifestations of presbycusis by acoustic oto-emissions. Review of the literature]. / Analyse des manifestations cochléaires de la presbyacousie par les oto-émissions acoustiques. Revue de la littérature.

This paper analyzes the results published in the literature about the physiopathology of presbycusis studied by evoked oto-acoustic emissions. Evoked oto-acoustic emissions were recorded in a group of normally hearing-subjects and a group of patients demonstrating sensorineural hearing loss due to presbycusis. Correlations studies were made between the incidence and threshold of evoked oto-acoustic emissions and (i) the age, (ii) the tonal audiometric thresholds and (iii) the speech audiometry. Complementary informations on outer hair cell degenerative changes in presbycusis could be deduced from these data.

[An approach to tumors of the face by degloving. An elegant treatment of inverted papillomas and various sinus cancers. Values. Limitations and extension]. / Abord des tumeurs de la face par "degloving". Une solution élégante au traitement des papillomes inverses et de certains cancers des sinus. Intérêts. Limites et extension.

Degloving constitutes a hidden route of access to the middle third of the face. It combines a bilateral sublabial incision with a rhinoplastic approach, whereby all the soft tissues of the face can be undermined subperiosteally, leaving no external scar. This method offers an extended bilateral route of access to lesions of the nasal cavities and ethmoid/sphenoid/maxillary sinuses, deep to the clivus. Its exposing features at least compare with conventional technics, including bone resection or the creation of a valve. This procedure may be associated with other neurosurgical approaches in the treatment of extended lesions of the basis of the skull. Its use is particularly recommended in the treatment of inverted papillomas, although it applies as well to malignant tumors of the sinuses under certain conditions. We present here a review of our experience.