Lesson 1: Does Ultrasound Estimate of the Amniotic Fluid Volume (AFV) Correlate with the Actual (Dye-Determined or Directly Measured) Amniotic Fluid Volume? Ultrasound poorly estimates actual abnormal AFS, quantile regression creates normal AFV curves, subjective and objective AFVs are similar, color Doppler overestimates oligohydramnios, single deepest pocket should be used for oligohydramnios and AFI for polyhydramnios estimations. Keywords: amniotic fluid volume, oligohydramnios, polyhydramnios, color Doppler, subjective assessment, objective assessment 8) The AFI should be used for identifying high AFVs. 7) The single deepest pocket should be used for identifying low AFVs. 6) The estimation of AFV can be done with the transducer held perpendicular to the floor or perpendicular to the uterine contour. 5) Intravenous hydration increases actual AFVs. 4) Color Doppler use leads to the over-diagnosis of oligohydramnios. 3) There is no difference in the accuracy of the subjective (visualization without measurements) compared with the objective (visualization with measurements) technique in identifying normal and abnormal AFVs. 2) Quantile regression is a better statistical methodology to create a normal AFV curve across pregnancy. 1) Ultrasound estimates normal actual AFVs well, but abnormal AFVs poorly.

Lessons learned by assessing the relationship of estimated to actual AFVs. This allows investigators to correlate estimated and actual AFVs. Slot # 518, Little Rock, AR, 72205, USAĪbstract: Actual AFV can be determined by a dye-dilution technique or be directly measured at cesarean. Morrison passed away on September 1, 2019ĭepartment of Obstetrics and Gynecology of the University of Arkansas for the Medical Sciences, 4301 W. Everett F Magann, 1 Julie R Whittington, 1 John C Morrison 2, † Suneet P Chauhan 3ġDepartments of Obstetrics and Gynecology of the University of Arkansas for the Medical Sciences, Little Rock, AR, USA 2Department of Obstetrics and Gynecology of the University of Mississippi Medical Center, Jackson, MS, USA 3Department of Obstetrics, Gynecology and Reproductive Sciences of the University of Texas Health Sciences Center at Houston, Houston, TX, USA

Normal amniotic fluid