Amniotic fluid volume assessment with the four-quadrant technique at 36-42 weeks' gestation.
An ultrasound approach was developed to identify normal amniotic fluid volume. The uterine cavity was divided into four quadrants. With the use of linear-array, real-time B-scanning, the vertical diameter of the largest pocket in each quadrant was measured. The sum of these four quadrants was used to provide a single number for the amniotic fluid volume and termed the amniotic fluid index. This approach is simple, requires little time and gives a semiquantitative estimate of amniotic fluid volume. Based on our observations, the normal amniotic fluid index in term gestation is 12.9 +/- 4.6 cm. Evaluation of the relationship between amniotic fluid volume and fetal outcome is under investigation.
Phelan
J P
JP
Smith
C V
CV
Broussard
P
P
Small
M
M
D000653:Amniotic Fluid; D005260:Female; D006801:Humans; D011247:Pregnancy; D011263:Pregnancy Trimester, Third; D014463:Ultrasonography / Q000379:methods*