[The hearing function in the one-year old children with intrauterine growth retardation evaluated by two objective audiological methods].

The objective of the present study was to collect objective information about the hearing function in the prematurely born infants suffering intrauterine growth retardation (IUGR). The audiological examination of 77 patients at the age of 12 months was performed using two different methods making use of distortion product otoacoustic emission (DPOAE) and evoked auditory steady state responses (ASSRs). Hearing disorders were diagnosed in the children presenting with grade II and III IUGR born prior to the 34th week of pregnancy.

[Tympanometry in the premature infants of different gestational age during the primary audiological examination].

The objective of the present work was to study specific approaches of tympanometry in the premature infants of different gestational age. A total of 122 typmanograms (243 ears) were available for the analysis. Peculiarities of recording tympanograms and their characteristics in the premature infants of different gestational age (including static compliance, intratympanic pressure, and tympanogram width) have been demonstrated.

[Changes in auditory function during first 6 months in premature children with intrauterine growth retardation].

Aim: To define an influence of intrauterine growth restriction to forming of hearing function of preterm infants.

Patients And Methods: The audiological test by the method of distortion product otoacoustic emission (DPOAE) was performed 3 times (during supposed dates of birth; 3 months old; 6 months old) in 136 premature children born while different gestation periods. Children were divided into 2 groups: premature children with intrauterine growth restriction (IUGR) and premature children with normal weight for their gestation age (normotrophy).

[The study of maturation of the auditory analyzer rabbit according distortion-product otoacoustic emissions].

Aim: In our chronic experiment to register changes of acoustic response of Distortion-Product Otoacoustic Emissions (DPOAE) of intact rabbits in postnatal ontogenesis for the purpose of getting normative data which can be used for studying impact of pathological factors on auditory function and maturation of activity of outer hair cell in ontogenesis.

Materials And Methods: Study of otoacoustic emissions used mature chinchilla rabbits with a 19 day life of up to 3 months.

Results: In the course of ripening were obtained functional activity of outer hair cells of the cochlea.

[The functional state of the auditory analyzer in prematurely born infants (after 29 weeks of gestation) at 6 months of life].

The objective of the present study was to evaluate the functional state of the auditory analyzer in infants born prematurely (after 29 weeks of gestation) and examined at 6 months of life. The evoked otoacoustic emission (EOAE) techniques were used for the purpose. Testing with the help of two different modes of EOAE yielded virtually identical results which confirms the possibility to apply both delayed EOAE (dEOAE) and distortion-product frequency OAE (dpOAE) for the assessment of the auditory function.