title: [The hearing function in prematurely born children during the first year of life depending on the duration of gestation estimated by the otoacoustic technique].
abstract: A total of 239 premature infants of different gestational age remained under the observation throughout the first year of their life for the elucidation of dynamics of the parameters of DP-gram. It was shown that the absence of the distortion-product otoacoustic emission (DPOAE) response during the first months of life of the premature infants was due to immaturity of their cochlear receptor apparatus. The predominant peak was recorded at a frequency of 2 kHz, regardless of the gestational age. The amplitude of DP-gram values in premature infants lay in the low-frequency region (f2=1 kHz) and never reached the high level. The most intensive maturation of the cochlear receptor apparatus is observed during the first 6 months in premature infants of the gestational age below 28 weeks. After the sixth month, the "high-level" response must develop, regardless of the gestational age. By this time, the intensity of maturation of the cochlear receptor apparatus in all age groups of premature infants is virtually identical (p>0.05).
mesh_terms: D001299:Audiometry / Q000295:instrumentation / Q000379:methods*; D004427:Ear Diseases / Q000175:diagnosis* / Q000503:physiopathology; D005865:Gestational Age; D018072:Hair Cells, Auditory, Outer / Q000473:pathology; D006309:Hearing / Q000502:physiology*; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D007234:Infant, Premature; D007235:Infant, Premature, Diseases / Q000175:diagnosis* / Q000503:physiopathology; D017084:Otoacoustic Emissions, Spontaneous / Q000502:physiology*