However, clinical data show that 80% of parents of deaf children have normal hearing. In 100 people with normal hearing, 4-5 people have deafness gene defects. If people with the same type of deafness get married, their chances of giving birth to deaf children are much higher than ordinary people.
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Why do pregnant women with normal hearing need to detect deafness genes?
In China, there are 6 deaf mutation genes in every 100 people with normal hearing. These people have a very high risk of giving birth to deaf children. More than 80% deaf children are born to parents with normal hearing.
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What population is deafness gene screening suitable for?
Suitable for everyone. Couples or pregnant women only need to take 2-3ml venous blood for testing before delivery.
For couples who are found to carry the same mutant gene, fetal deafness gene detection can be carried out earlier than pregnancy10-1week or pregnancy 18-2 1 week, so as to realize early diagnosis and early intervention. Achieve the goal of prenatal and postnatal care.
Is it possible for deaf-mute couples to give birth to babies with normal hearing?
After both husband and wife carry out genetic testing and find the pathogenic gene, prenatal diagnosis and genetic screening of neonatal deafness are carried out. If it is determined that it is a deaf child, it can be treated early and implanted with a cochlear implant to make the baby have normal hearing; If the baby is detected to have potential hearing problems, it can protect the child's hearing health for life by avoiding contact with certain drugs and trauma.
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Why do some babies have "one needle deafness"?
According to some data, half of the new deaf children in China are drug-induced deafness. Deafness caused by the use of antibiotics is related to children's physique. Such children can avoid deafness by banning certain drugs for life if genetic testing is carried out early and their physical condition is clear.
The baby has passed the hearing test. Will there be no problem with hearing in the future?
Drug-induced deafness means that children are deaf because they carry some deafness genes after using some antibiotics. Delayed deafness means that children have normal hearing at birth and are more likely to be deaf after some trauma, which is also related to genes. These deafness can actually be prevented by early examination.
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Why is genetic screening for deafness necessary?
There are 800,000 deaf children under the age of 7 in China, and the number is increasing by 30,000 every year. Out of every 65,438+0,000 newborns, 65,438+0-3 have hearing impairment. Drug-induced deafness and delayed deafness account for 30% of deaf children.
What are the benefits of genetic screening for deafness?
● Deafness genetic testing can early detect congenital deafness and children with delayed deafness, and carry out medical intervention to avoid birth defects;
● Deafness genetic testing can also find expectant mothers with drug-induced deafness genes and give medication safety guidance to mothers, babies and family members;
● Detection of deafness gene can also remind family members with deafness gene mutation of the risk of deafness-to remind family members to jointly prevent deafness.
What should I do if the deafness gene test result is positive?
Positive results need the professional guidance of clinicians. If necessary, further deafness gene testing should be carried out for the father (taking blood) and the fetus (taking amniotic fluid). If the expectant mother's test results show that the drug-induced deafness gene is positive, there is no need for other tests, but it is recommended that expectant mothers, babies and their families ban the use of deafness-causing drugs for life to prevent deafness.
Content Review: Zhong Min Otolaryngology Hospital.