Neonatal screening of hearing function by otoacustic emissions - a single center experience

Clinic for Ear, Nose and Throat, Clinical Center Kragujevac, Kragujevac, Serbia.
Vojnosanitetski pregled. Military-medical and pharmaceutical review (Impact Factor: 0.29). 04/2012; 69(4):340-4. DOI: 10.2298/VSP1204340Z
Source: PubMed


Nowadays development of techniques enables detection of hearing impairment in a very short time, immediately after birth by using otoacoustic emissions. They are low-pitched sounds produced in physiologically clear cochlea and can be recorded in cochlear outer meatus. By this method, complete data are found on a whole presynaptic auditory nervous system functioning that has mostly been affected by pathological changes making it a perfect screening test. Reliability and sensibility of this method is up to 98%. The aim of this study was to present the first results of systematic neonatal screening of hearing function by otoacoustic emissions in the Clinical Center Kragujevac (Kragujevac, Serbia).
This prospective study of neonatal hearing screening function, initiated systematically by the 2008 at the Clinical Center Kragujevac, included full-term newborns and premature born ones, within the first 24 h after birth, using a DPOAEs interacoustics otoread-screener. Retesting was done after a month.
From January 1st, 2009 to December 1st, 2010, a total number of examined infants by this method was 1,994 out of which 1,778 were full-term and 216 were premature born. The test passing was higher in the group of full-term babies (92.5%) than in the preterm ones (55.1%). No bilateral answers were recorded in premature born children compared to the full-term ones, of whom a larger number was with missing lateral responses. The results of re-examination test in the group of full-term born and premature newborns were 83.7%, and 61%, respectively.
Deliberately provoked transient otoacoustic emission is an efficient method in testing hearing function in newborns, since it is non-invasive, rapid and objective. Its correlation with audibly evoked potentials is very high, which confirms its reliability.

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Available from: Vladimir Jakovljevic, Aug 25, 2014
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    ABSTRACT: SYNOPSIS Advances in audiological testing equipment and techniques allow accurate hearing screening of the newborn, using either otoacoustic emission screeners or automated auditory brainstem evoked response audiometry. Hearing screening lowers the age of diagnosis of permanent hearing loss. Evidence also indicates that early detection and management of hearing loss leads to improved speech, language and educational outcomes. In Australia, newborn hearing screening is not widely available. Screening is available to babies 'at risk' of hearing loss, to all babies born in hospitals where the West Australian screening program is implemented, and is either being trialled or developed in other states. Awareness of the benefits and limitations of newborn hearing screening will enable the healthcare professional to support children with a hearing loss, and their families, so that they are able to maximise their potential.
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    ABSTRACT: Bilateral hearing loss is present in 1-3 per 1000 newborn infants, and in 2-4 per 100 infants in the intensive care unit population. All infants with hearing loss should be identified before 3 months of age and receives intervention by 6 months. If undetected, this will impede speech, language, and cognitive development. In Tunisia, we do not have an exhaustive information on the real importance of the auditive handicap. The aim of our study was to evaluate the feasibility and the practical aspects of a pilot tunisian universal neonatal hearing screening (UNHS) program based on transient evoked otoacoustic emission reporting the incidence of hearing impairment in this population. A prospective study during one year (01/05/2006 to the 30/04/2007). Transient evoked otoacoustic emission was planned for all live births. If the test could not be practised in maternity or that research was negative, an appointment was delivered for a research of the O.T.E.A.P in an interval of 1 week - 1 month. Infants who did not meet TEOAE pass criteria underwent diagnostic auditory brainstem response (ABR) testing. During the study period, 3342 live births were recorded, 3260 were included. Total coverage rate was of 41% (1333/3260). We recorded 3 cases of bilateral hearing loss (0.9 per thousand screened infants) and 5 with unilateral sensorineural hearing loss (1.5 per thousand screened infants). The incidence of congenital hearing loss in our population seems relatively high. Hearing screening for all neonates using transient evoked otoacoustic emission is feasible but several practical aspects should be revised.
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