[Modified butterfly cartilage tympanoplasty: retrospective study on 26 patients].

Objective: To assess the results of inlay butterfly tympanoplasty on dry perforation.

Study Design: Retrospective case study.

Patients: 26 patient (14 male, 12 female), mean age 38 years, ranged from 9 to 73.

[Clinical, etiologic and therapeutic aspects of chronic sphenoid opacities].

A series of 23 patients with sphenoid disease were seen between 1992 and 1997. The most common symptom was headache. This headache was found to be nonspecific.

[Acute and chronic sphenoid sinusitis. Review of the literature].

Isolated involvement of the sphenoid sinus is a relatively uncommon entity. We present a review of the most important series. Acute and chronic diseases are separated.

Characteristics of the acoustic distortion product 2f2-f1 from the normal human ear.

The aim of this study was to determine the basic properties of the 2f2-f1 distortion product otoacoustic emissions (DPOEs) in 36 normally hearing subjects and to compare their characteristics with those of the 2f1-f2 DPOEs. The influence of stimulation parameters on 2f2-f1 DPOE behaviour was examined: i) stimulation levels varied from 40 to 70 dB sound pressure level in 10 dB steps; and ii) two values of the f2/f1 ratio were used (1.12 and 1.

Statistical evaluation of hearing screening by distortion product otoacoustic emissions.

The aim of this study was to provide a statistical evaluation of the screening properties of distortion product otoacoustic emissions (DPOEs) in individuals with clinically normal hearing and in patients with pure sensorineural deafness of various degrees. The main informational parameters used were sensitivity, specificity, positive predictive value (PPV), negative predictive value (NPV), and the analysis of receiver operating characteristic (ROC) curves. For each frequency tested, ears were classified as a function of their audiometric threshold.