Title:Comparison of Amniotic Fluid Index and Single Deepest Vertical Pocket
Volume: 18
Issue: 2
Author(s): Roopa Padavagodu Shivananda*, Rekha Anbu, Shubha Rao, Nivedita Hegde, Anjali Suneel Mundkur and Shripad Hebbar
Affiliation:
- Department of Obstetrics and Gynecology, Kasturba Medical College, Manipal Academy of Higher Education,
Manipal, Karnataka, India
Keywords:
AFI, SDVP, AFV, high-risk pregnancy, perinatal outcomes, maternal outcomes.
Abstract:
Background: The best method of estimation of amniotic fluid volume is a matter of ongoing
debate.
Objectives: To determine the perinatal & maternal outcomes in pregnant patients when the amniotic
fluid volume was assessed by the Amniotic Fluid Index (AFI) in comparison to the Single Deepest
Vertical Pocket (SDVP).
Methods: We studied abnormal cardiotocograph, meconium stained amniotic fluid, birth weight <
2.5 kg, Apgar score at 5 min < 7, cord blood pH < 7.2 & necessity for NICU admission as perinatal
outcomes. Rate of diagnosis of oligohydramnios, induction of labor for oligohydramnios & mode
of delivery were observed in maternal outcomes.
Results: Of the 697 pregnant patients recruited, 353 were in the AFI and 344 in the SDVP group.
Perinatal outcomes were similar in both. In the AFI group, the number of women diagnosed with
oligohydramnios was higher (p = 0.0333) & the rate of induction was also higher (p = 0.003378).
Vaginal deliveries were more in the SDVP group. The Receiver Operating Characteristic curves
showed statistically significant correlation with NICU stay, birth-weight, and mode of delivery.
While an AFI of > 5 cm and SDVP of > 1.9 cm had good sensitivity in predicting babies with a
birth weight of ≥ 2.5 kg and avoiding NICU admissions, an AFI of > 5.8 cm and an SDVP of > 1.9
cm had a sensitivity of around 80% in predicting successful vaginal deliveries.
Conclusion: The SDVP method has a slight edge over the AFI in terms of lower inductions and
higher vaginal deliveries with comparable perinatal outcomes.
