[Evaluation of the infants' hearing loss in hearing screening].

Objective: To analyze the confusing factors and clinical and audiological characteristics of ABR and tympanometry in infants who failed the first and second hearing screening.

Method: Between August 2005 and November 2007, 94 infants (144 ears) with detailed birth record and hearing screening record were reviewed in the study. The age of this series ranged from 48 days to 6 months.

[Evaluation of eustachian tube function with impedance audiometry in chronic suppurative otitis media].

Objective: To evaluate the Eustachian tube function with impedance audiometry of the various types, durations and status of chronic suppurative otitis media.

Method: The Eustachian tube functions of 368 patients (402 ears) of chronic suppurative otitis media were measured by the manual model of reading meter and regulating air pressure with impedance audiometry. The data were analysed statistically.