Normal range of amniotic fluid index 38 weeks?

summary

We call amniotic fluid the colorless transparent fluid that surrounds the baby in the womb. Amniotic fluid can protect the fetus from the impact of external forces, participate in the metabolism of the fetus, protect the mother, and reduce the discomfort caused by fetal movement. In normal pregnancy, the amount of amniotic fluid gradually increases with the increase of gestational age, generally about 1000 ml at 38 weeks of pregnancy, and about 800 ml at term.

Normal range of amniotic fluid index 38 weeks?

Amniotic fluid index (AFI): take the umbilical horizontal line and abdominal white line as the mark, divide the right angle of uterus into four quadrants, measure the vertical diameter of the largest amniotic fluid pool in each quadrant, and the sum of the four is the amniotic fluid index.

The normal range of amniotic fluid index was 9-24 cm. AFI ≥ 25cm was diagnosed as polyhydramnios, of which AFI 25-35cm was mild polyhydramnios, AFI 36-45cm was moderate polyhydramnios, AFI > 45cm was severe polyhydramnios; AFI ≤ 5cm was diagnosed as oligohydramnios, and AFI ≤ 8cm was diagnosed as oligohydramnios.

Most hospitals understand the condition of amniotic fluid volume by ultrasound, and adopt amniotic fluid index method to determine whether the amniotic fluid volume is normal. The method is: divide the uterus into four quadrants, measure the maximum depth of amniotic fluid in each quadrant respectively, and then add up to find the sum. Amniotic fluid index (AFI) ≥ 25cm was diagnosed as polyhydramnios, ≤ 5cm was diagnosed as oligohydramnios, and ≤ 8cm was diagnosed as oligohydramnios.

matters needing attention

If oligohydramnios is found in the third trimester of pregnancy, the fetal intrauterine condition can be evaluated in detail after excluding fetal malformation, so as to promote fetal lung maturation; The pregnancy should be terminated as soon as the fetus is mature. Termination of pregnancy, can be vaginal delivery, can also be cesarean section, according to the specific state of the fetus and mother to choose. In this case, most of them can give birth to a healthy baby smoothly.