Estimation of the amniotic fluid volume using the Cavalieri method on ultrasound images

Objectives: Presently, a design-based and practical method for measuring amniotic fluid volume (AFV) for routine clinical examinations has not been proposed. In this study we describe a new method, which combines the Cavalieri method with ultrasound imaging to estimate AFV. Methods: We measured the...

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Bibliographic Details
Published in:International journal of gynecology and obstetrics 2003-07, Vol.82 (1), p.25-30
Main Authors: Sahin, B, Alper, T, Kökçü, A, Malatyalioglu, E, Kosif, R
Format: Article
Language:English
Subjects:
Amniotic Fluid - diagnostic imaging
Amniotic fluid volume
Biological and medical sciences
Body Weights and Measures - methods
Cavalieri method
Female
Gynecology. Andrology. Obstetrics
Humans
Management. Prenatal diagnosis
Medical sciences
Pregnancy
Pregnancy. Fetus. Placenta
Stereology
Ultrasonography, Prenatal - methods
Ultrasound
Uterus - diagnostic imaging
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Summary:Objectives: Presently, a design-based and practical method for measuring amniotic fluid volume (AFV) for routine clinical examinations has not been proposed. In this study we describe a new method, which combines the Cavalieri method with ultrasound imaging to estimate AFV. Methods: We measured the AFVs of 14 women in the third trimester of pregnancy, and repeated our measurements three times for each woman. Parallel planimetric ultrasonographic images were obtained at every 2 cm along the longitudinal uterine axis. AFVs were calculated as the total of the multiples of the estimated cut surface areas by the section thickness. Results: The mean estimated AFV was 380.5 cm 3. The coefficient of error of each measurement was calculated and the mean was 0.108. The coefficient of correlation between the amniotic fluid index and our AFV estimations was 0.87. Conclusions: Design-based and efficient estimation of AFV is possible with the combination of consecutive ultrasound images and the Cavalieri method.
ISSN:0020-7292
1879-3479
DOI:10.1016/S0020-7292(03)00122-X