Amniotic fluid index
Updates to Article Attributes
Body
was changed:
The amniotic fluid index (AFI) is an estimate of the amniotic fluid volume in a fetus. It is part part of thefetal biophysical profile.
Technique
- uterus is divided into four imaginary quadrants with linea nigra and umbilicus acting as the vertical and the horizontal axis respectively
- the deepest pocket devoid of umbilical cord and fetal parts is measured in the vertical dimension
- measurment of the four pockets is in centimeters
- sum of all the four quadrant
measurementsmeasurements is AFI - normal AFI values range from
55 to 25 cm
Values
- AFI between 8-18 cm
isis considered normal; median AFI level is ~14 cm from week 20 to week 35, after whichthethe amniotic fluid volume begins to reduce - AFI <5
-6cm is considered as oligohydramnios- value changes with age: the 5th percentile for gestational ages is most often taken as the cutoff value, and this around an AFI of 7 for second and third trimester pregnancies; and AFI of 5 is two standard deviations from the mean
- AFI >20-24 cm is considered as polyhydramnios
The normal range for amniotic fluid volumes varies with gestational age. As a rule of thumb:, but typical
- AFI of <
;8;5 implies oligohydramnios - AFI of 5-8 is low normal or borderline
- AFI of >25 implies polyhydramnios
-<p>The <strong>amniotic fluid index (AFI) </strong>is an estimate of the <a href="/articles/amniotic-fluid-volume">amniotic fluid volume</a> in a fetus. It is part of the <a href="/articles/fetal-biophysical-profile">fetal biophysical profile</a>. </p><h4>Technique</h4><ul>- +<p>The <strong>amniotic fluid index (AFI) </strong>is an estimate of the <a href="/articles/amniotic-fluid-volume">amniotic fluid volume</a> in a fetus. It is part of the <a href="/articles/fetal-biophysical-profile">fetal biophysical profile</a>. </p><h4>Technique</h4><ul>
-<li>sum of all the four quadrant measurements is AFI</li>-<li>normal AFI values range from 5 to 25 cm </li>- +<li>sum of all the four quadrant measurements is AFI</li>
- +<li>normal AFI values range from 5 to 25 cm </li>
-<li>AFI between 8-18 cm is considered normal; median AFI level is ~14 cm from week 20 to week 35, after which the amniotic fluid volume begins to reduce</li>-<li>AFI <5-6 cm is considered as <a href="/articles/oligohydramnios">oligohydramnios</a><ul><li>value changes with age: the 5<sup>th</sup> percentile for gestational ages is most often taken as the cutoff value</li></ul>- +<li>AFI between 8-18 cm is considered normal; median AFI level is ~14 cm from week 20 to week 35, after which the amniotic fluid volume begins to reduce</li>
- +<li>AFI <5 cm is considered as <a href="/articles/oligohydramnios">oligohydramnios</a><ul><li>value changes with age: the 5<sup>th</sup> percentile for gestational ages is most often taken as the cutoff value, and this around an AFI of 7 for second and third trimester pregnancies; and AFI of 5 is two standard deviations from the mean</li></ul>
-</ul><p>The normal range for amniotic fluid volumes varies with gestational age. As a rule of thumb:</p><ul>-<li>AFI of <8 implies <a href="/articles/oligohydramnios">oligohydramnios</a>- +</ul><p>The normal range for amniotic fluid volumes varies with gestational age, but typical</p><ul>
- +<li>AFI of <5 implies <a href="/articles/oligohydramnios">oligohydramnios</a>
- +<li>AFI of 5-8 is low normal or borderline</li>
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