Instructions for Use of the Digital Hearing Instrument
Digital Hearing Instrument is a combination of hardware and software. It has the characteristics of objectivity, sensitivity and non-invasiveness. It has special application value in the detection of hearing function in newborns, so it has become a hearing screening for newborns, which is a conventional technique. However, the test results are easily affected by environmental noise, the special physiological characteristics of the external auditory canal and middle ear, and the state of the test, especially after 24 hours of birth, fetal residues such as fetal fat, secretions and amniotic fluid in the outer ear canal of newborns. The object will attenuate the incoming stimuli and the outgoing response signals, thus affecting the pass rate of the test. In addition, the placement of the earplugs is inconsistent with the axis of the external auditory canal or the environmental conditions are not ideal, and the instrument is unstable, which may lead to false positive results of newborn hearing screening. False positives can cause a series of problems, such as increasing the psychological burden of maternity and family members, making parents suspect that their children may have hearing problems, causing anxiety, anxiety and worry to the family. Although the nurses explain, sometimes they still cannot Dispel the doubts of the mother, worry that the baby must have problems. This is actually very unfavorable for the recovery of the mother, and even potentially induces complications such as postpartum hemorrhage. Too many false positives can increase the workload of the medical staff and increase the number and cost of visits by the mother and the family.
Experiments were carried out on 223 newborns with a Digital Hearing Instrument test. The results of the experiment showed that the initial screening rate of the distortion product otoacoustic emission increased with the increase of the newborn age. The results of hearing screening at 24 h and 48 h in the experimental results were low, only 52.16% and 75.87%, which may be related to the blockage of fetal fetal fat in the external auditory canal and the absorption of amniotic fluid in the middle ear. The 72 h pass rate was 92.95%. Therefore, 72 hours after birth is the best time for newborn hearing screening. At this time, the newborn hearing screening device is the best.
Compared with the conventional hearing screening method, the pull ear method has a high hearing pass rate and a significant difference (P <0.01). Due to the external auditory canal of the newborn is a cartilage structure, it is squeezed from the outside to the inside and upward. Therefore, when placing the probe, the auricle should be pulled backwards and downwards to straighten the ear canal, which is important part for improving the hearing rate of newborns. Therefore, it is best to use the pull pin method when using the hearing screening device. For newborns who have not passed the initial screening, they should be reviewed once before discharge. Those who have not passed the examination should be reviewed again 42 days after discharge to confirm the presence or absence of hearing impairment, which is convenient for early intervention treatment.
Understanding the best time and method of using the newborn hearing screener can better serve the newborn, ensure the health of the baby, reduce the worry of mothers.