How do you do the amniotic fluid index?

To calculate the amniotic fluid index (AFI), the anteroposterior diameters of the largest empty fluid pocket (no umbilical cord or fetal parts) in each quadrant are added together. The AFI is normally 7 to 25 cm. In addition, each individual pocket of fluid should be 2 to 8 cm.

What is AFI in pregnancy scan?

An ultrasound examination can diagnose either too little or too much amniotic fluid. Doctors commonly measure the depth of the fluid in four quadrants in the uterus and add them up. This method of measuring amniotic fluid is referred to as the amniotic fluid index (AFI).

What is a normal amniotic fluid index?

A normal amniotic fluid index is 5 cm to 25 cm using the standard assessment method. Less than 5 cm is considered oligohydramnios, and greater than 25 cm is considered polyhydramnios.

When do you start measuring AFI?

The AFI is typically measured after 25 weeks of gestation. A normal AFI measures greater than 5 cm and less than 24 cm. Oligohydramnios is diagnosed if the AFI measures less than or equal to 5 cm, and polyhydramnios is diagnosed if the AFI is greater than 24 cm.

What is low normal amniotic fluid?

A normal AFI is 5 to 25 cm. An AFI below 5 cm means low amniotic fluid.

What is normal AFI at 28weeks?

A normal AFI was considered to be a value between the 5th and 95th percentiles for gestational age. The 5th and 95th percentile values for our total study group from 28 to 42 weeks gestation were 88 and 169 mm, respectively.

What is the normal AFI at 36 weeks?

AFI values from 34 to 40 weeks; mean, standard deviation, and percentile values (all in centimeters)….5. Results.

What is the normal AFI at 37 weeks?

Results. Starting from 34 weeks till 40 weeks, 50 ultrasound measurements were available at each gestational age. The mean (standard deviation) of AFI values (in cms) were 34 W: 14.59 (1.79), 35 W: 14.25 (1.57), 36 W: 13.17 (1.56), 37 W: 12.48 (1.52), 38 W: 12.2 (1.7), and 39 W: 11.37 (1.71).

What is normal AFI at 32weeks?

An AFI between 8-18 is considered normal. Median AFI level is approximately 14 from week 20 to week 35, when the amniotic fluid begins to reduce in preparation for birth. An AFI < 5-6 is considered as oligohydramnios. The exact number can vary by gestational age.

What happens if AFI is high?

Women with polyhydramnios may experience premature contractions, longer labor, difficulties breathing, and other problems during delivery. The condition can also cause complications for the fetus, including anatomical problems, malposition, and, in severe cases, death. Treatment aims to remove excess amniotic fluid.

What is the normal amniotic fluid index at 36 weeks?

5. Results

How do you measure amniotic fluid?

The amount of amniotic fluid is measured either by checking the largest pocket of fluid by ultrasound or by measuring the largest amniotic fluid pocket in each of four quadrants and then adding those up. This is called the AFI or Amniotic Fluid Index.

What causes high amniotic fluid levels?

Various conditions can cause high amniotic fluid levels, such as the following: Congenital Defects: Usually higher levels of fluid mean an increase in the chance of a congenital defect. The build up occurs because the defect restricts swallowing which leads to a build up of amniotic fluid.

What are the dangers of low amniotic fluid?

Low levels of amniotic fluid can lead to pregnancy complications and birth injuries, including: miscarriage, pre-term labor, birth defects, brain trauma, and cord compression. Oligohydramnios, the medical term for having too little amniotic fluid in the womb, occurs in approximately 8% of pregnancies and is most common during the third trimester.

What does low amniotic fluid really mean?

Low amniotic fluid means that there is too little fluid around your baby in the uterus during pregnancy. The medical term for this problem is oligohydramnios.