What should I do to prepare my child for a hearing test? Young children who are found to be hearing impaired or who do not pass the postnatal hearing screening need to undergo a systematic audiologic examination as soon as possible to diagnose the hearing impairment. These tests usually involve an evaluation of the child’s middle ear, inner ear, and auditory nerve function, and take at least 1 to 2 hours. The child must be asleep during the examination. Therefore, it is important to prepare for the examination. Specifically, it includes the following aspects: 1, the day before the examination, parents can appropriately reduce the child’s sleep time (late to bed and early to rise), so that before the examination is in a certain state of drowsiness, so that with the sedative effect of the drug will be relatively easy to fall asleep. 2, 1 hour before the examination is preferable not to eat too much and drink water. 3, in the preparation of the examination needs to be given to the child 30 minutes prior to the oral sedative, the most commonly used drug is 10% chloral hydrate solution. 4, the child’s hearing nerve function assessment requires at least 1~2 hours. 5, the child’s hearing nerve function assessment takes at least 1~2 hours. The most commonly used drug is 10% chloral hydrate solution. Parents need to prepare the child’s drinking water, bottles, milk powder (or breast milk), diapers, change of clothes and other items to spare. Chloral hydrate tastes bitter, you can prepare some sweet snacks for your baby in advance to make your baby take the medicine faster.4. After taking chloral hydrate orally, you should try to eat less milk, drink less water and beverages, so as not to dilute the concentration of the medicine, which will affect the efficacy of the medicine.5. For the young children who are inconvenient to take chloral hydrate orally, you can also take the way of retention enema. The child needs to be allowed to defecate before administration to avoid affecting the effect of drug absorption.6. Dizziness and other discomforts may occur after the use of chloral hydrate, so the child should be closely supervised by the parents after the examination, and should not be allowed to walk on their own in order to prevent accidents such as falls. Why is it necessary to use sedative drugs during audiologic examination for infants and children? This is because the audiological examination takes a long time and no physical activity is allowed during the process. Sometimes subtle movements such as blinking or turning one’s head may affect the judgment and accuracy of the test results. Young children are usually not as cooperative as adults, so sedation and hypnosis are important before the examination. In addition, imaging tests such as CT and MRI are needed after the hearing test to find the cause of the hearing impairment and to determine whether there are any inner ear malformations, white matter dystrophy, or developmental malformations of the auditory nerve. Sedative medications are also needed for young children who cannot cooperate. Will chloral hydrate affect my baby’s health? Chloral hydrate is a hypnotic, anticonvulsant drug, pediatric patients can be induced to sleep within 30 minutes of taking a hypnotic dose, causing near-physiological sleep. This drug hypnotic effect is mild, no obvious adverse reactions, is the current domestic line of children’s audiological examination routine use of sedative hypnotic drugs. Due to the possible individual differences between each child, the same dosage may appear in individual children some adverse reactions, including: irritation of the gastric mucosa, there may be drowsiness, hypothermia; may cause seizures; there may be dysphagia, shortness or difficulty in breathing, heart rate is too slow, severe fatigue; overdosage may be detrimental to the liver and renal function, and in the recovery of the transient jaundice and urinary proteins can occur; allergic rashes occasionally occur. Occasionally, allergic rash and urticaria occur. Therefore, for preterm infants, low-birth-weight infants or those suffering from heart disease, liver disease, febrile illnesses, idiosyncratic constitution, etc., the medication should be used under the guidance of relevant specialists in order to reduce the incidence of its adverse effects.