How to do newborn hearing screening?
Generally, when the baby is asleep or quiet, put a probe or an earmuff with a suitable size in one ear to start the test, and then do the other ear after finishing one ear.
Screening method: otoacoustic emission (OAE). It is required that the test environment is quiet and the noise is controlled below 45-50dB, which can speed up the test. Screening is rapid and non-invasive. During the test, the probe is closely attached to the external auditory canal 1/3, and there is no need to place electrodes, which will not cause any harm to the newborn.
Screening is affected by the state of the outer ear and middle ear. For example, fetal sebum, residue and middle ear exudate in the external auditory canal of newborns will attenuate the incoming stimulus sound and outgoing response signal, resulting in the signal of otoacoustic emission weakening or disappearing in a certain frequency band.
When is the newborn hearing screening done?
The initial screening process (initial screening) should be carried out during the hospitalization period of 3-5 days after birth.
If the baby fails to pass the preliminary screening within 42 days after birth; Or the initial screening is "suspicious"; Even if the initial screening has passed, children with high hearing loss, such as children in intensive care units, need to be screened again.
Benefits of neonatal hearing screening
The reason for setting up newborn hearing screening is that sometimes the baby is just born, including vision, hearing and many other aspects are not fully developed, and it is impossible to judge the baby's internal development through his own feelings. Hearing screening for newborns is conducive to clearly understanding the baby's hearing situation and finding out whether the baby has hearing problems.
In addition, recognizing the hearing situation from an early age is also conducive to the healthy growth of the baby in the future, whether it is physical or psychological development. If the screening results are not satisfactory, measures can be taken as soon as possible to prescribe the right medicine. In order to avoid the remaining problems, the more it develops, the more out of control.
What should I do if newborn hearing screening fails?
Infants who fail to pass the re-screening should undergo audiological and medical evaluation at the age of 3 months to determine whether there is congenital or permanent hearing loss within 6 months, so as to implement intervention. That is to say, children who fail the re-examination should be examined by hearing testing institutions in otorhinolaryngology, acoustic impedance, otoacoustic emission, auditory brainstem evoked potential, behavioral audiometry and other related examinations, and medical and imaging assessments should be made when necessary to make a diagnosis.
For children with high risk factors of hearing loss, the time and frequency of individualized hearing retest should be formulated according to the possible delayed hearing loss. For infants who have passed the newborn hearing screening but have high risk factors for hearing loss, they should be followed up/kloc-0 every 6 months after at least 3 years old. If hearing loss is suspected, audiological evaluation should be made in time.
Neonatal hearing development index
Hearing development of 0-7 days old baby
The baby has already heard. Most babies can respond to 1-2 auditory stimuli 24 hours after birth, and they are also very sensitive to adults' voices. Adults whisper around the baby to see if the baby will react differently to the sound.
8-30 days baby's hearing development
Hearing is fully developed, he will pay close attention to human voices and be sensitive to noise. When talking around the baby, the baby turns his head to the familiar voice and language.