What's wrong with the dark brown color of amniocentesis? Generally speaking, amniotic fluid is clear or slightly light brown. If it is dark, you should pay attention. Be careful of the baby's intrauterine hypoxia.
Amniocentesis is also called amniocentesis. Amniocentesis? , is one of the prenatal examination items. Amniocentesis? Under the guidance of ultrasound, the process of passing a slender needle through the abdomen and uterine wall of pregnant women and entering the amniotic cavity to extract part of amniotic fluid is called? Amniocentesis? . Amniocentesis has been used for prenatal diagnosis for 30 years, and the accuracy and safety of diagnosis have been recognized by the medical community.
The best time for prenatal diagnosis is pregnancy 16 ~ 24 weeks. Because at this time, the fetus is smaller and there is relatively more amniotic fluid, and the fetus floats in the amniotic fluid with a wide amniotic fluid belt around it. Using acupuncture to extract amniotic fluid is not easy to hurt the fetus. Extracting 20 ml of amniotic fluid only accounts for 1/20 ~ 1/65438 of the total amniotic fluid, which will not cause the uterine cavity to suddenly become smaller and cause abortion, and the proportion of living cells in amniotic fluid is the largest in this period. Determination of alpha-fetoprotein in amniotic fluid can also diagnose fetal open neural tube malformation.
What are the risks of amniocentesis? 1. Fine needle puncture into amniotic cavity may cause bleeding, hemorrhagic shock, amniotic fluid outflow, abortion and fetal injury.
2. The failure of puncture may be due to uterine malformation, placenta in the front wall, thick abdominal wall and oligohydramnios.
3. Because the in vitro culture of exfoliated cells in amniotic fluid cell culture system is influenced by many factors, such as sheep puncture time, whether the samples are mixed, culture medium pollution, etc., amniotic fluid culture may fail, and sometimes the diagnosis cannot be made because of mating.
4. Due to the limitation of existing medical technology, biochemical examination, cytology and molecular genetic analysis of amniotic fluid are sometimes difficult to diagnose and need further examination.
5. If pregnant women have invisible infection before operation or poor sanitary conditions after operation, intrauterine infection may occur.
6. If pregnant women are complicated with cardiovascular and cerebrovascular diseases, cardiovascular and cerebrovascular accidents may occur due to stimulation such as pain and tension.
7. Through this examination, diseases with abnormal chromosomes can be ruled out. However, due to the limitation of existing medical technology, it is sometimes difficult to distinguish some slight chromosomal abnormalities, and it is impossible to rule out some fetal malformations or abnormalities caused by polygenic diseases or other reasons.
8. The failure of amniotic fluid culture may be caused by irresistible external influences such as power failure, earthquake or damage to culture equipment.
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