Amniotic fluid is the liquid in the amniotic cavity of the early embryo. The early pregnancy is mainly the leakage of maternal plasma into the amniotic membrane through the membrane. In the middle stage, fetal urine is the main source. Amniotic fluid has the function of protecting the fetus and protecting the mother during pregnancy. Amniocentesis has a significant effect on pregnancy outcomes and perinatal prevalence and mortality. Traditional amniocentesis is diagnosed as amniotic fluid culture positive, placenta and fetal membrane histology found chorion, amnion or villus Membrane and amniotic membrane cultured pathogenic bacteria.

Basic Information

Specialist classification: maternity check check classification: biochemical examination

Applicable gender: whether women are fasting: not fasting

Analysis results:

Below normal:

Normal value:

Above normal:

Normal amniotic fluid is free of bacteria or negative.

Prompt bacterial infection, amnion chorioamnionitis.

Reminder: Specimens should be sent immediately after collection, and the results will be significantly reduced due to exposure to sunlight. Normal value

Normal amniotic fluid is free of bacteria or negative.

Clinical significance

Positive indicates amniotic chorioamnionitis.

Positive results may be diseases: amnion infection syndrome considerations

Amniocentesis is usually performed in the second trimester (16-21 weeks of gestation). The urine should be drained before surgery, with both hands on the hips and gently turn the waist and abdomen. Then supine, use B-ultrasound to detect the positioning, select the puncture point, and puncture under strict aseptic operation conditions. Generally, about 20 ml of amniotic fluid is taken and placed in a clean and sterilized centrifuge tube for immediate inspection.

Inspection process

Amniotic fluid specimens are usually sent by a general professional physician after amniocentesis. Detection operation: After the smear is fixed by methanol or other fixing solution, the staining solution is selected as needed, and then microscopic examination is performed.

Not suitable for the crowd

1. It is not advisable for pregnant women to have a cold.

2, the consent of pregnant women and their families should be obtained before surgery, and those without amniocentesis should not be carried out.

Adverse reactions and risks

1, maternal injury: puncture needle stab wound blood vessels caused by abdominal wall hematoma uterine subserosal hematoma. Occasionally, amniotic fluid enters the maternal blood circulation from the puncture hole and causes amniotic fluid embolism. The bladder was not emptied before the puncture, and the bladder was injured.

2, damage to the fetus, placenta and umbilical cord: puncture needle damage to the fetus can occur bleeding, stab wounds and umbilical cord can also occur bleeding or hematoma. Therefore, the source of bleeding should be identified when taking hemorrhagic amniotic fluid. If you suspect that you are from a fetus, you should continue to listen to the fetal heart.

3, amniotic fluid leakage: postoperative amniotic fluid leakage from the needle hole, resulting in too little amniotic fluid, affecting fetal development, and even cause miscarriage or premature birth.

4, abortion or premature delivery: the incidence of abortion or premature birth 0.1% -0.2%, often occurred within one week after surgery, even after the puncture, premature rupture of membranes leading to premature delivery.

5, intrauterine infection: postpartum may have maternal fever. Intrauterine infection can cause abnormal fetal development, or even fetal death. Therefore, amniocentesis should be strictly aseptic.