[Ultrasound monitoring].
Ultrasound investigation is peculiar when pregnancy is complicated by gestational diabetes. One have to study interventricular septal thickness and to predict macrosomia. Before delivery septal thickness should be under 6 mm. Estimated fetal weight (EFW) and abdominal circumference (AC) are accurate to detect macrosomia. Quite all formulas of EFW are not significantly different. An EFW of 4,000 gm have a sensitivity of 45% and positive predictive value of 81% to predict macrosomia. AC >=35 cm have a negative predictive value of 99% and AC >=37 cm have a positive predictive value of 91% to predict an EFW of 4,000 gm. Soft-tissue measurements are used to evaluate the increase of fetal fat body mass. Cheek to cheek diameter, upper arm subcutaneous tissue, shoulder subcutaneous tissue can be used. Three-dimensional ultrasonography may offer volume assess of the thigh or upper arm.
Biquard
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F
Service de Gynécologie-Obstétrique, CHU, 4, rue Larrey, 49033 Angers Cedex 01, France.
Fournié
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A
D036861:Delivery, Obstetric; D016640:Diabetes, Gestational / Q000150:complications / Q000000981:diagnostic imaging*; D005260:Female; D005320:Fetal Macrosomia / Q000000981:diagnostic imaging / Q000209:etiology; D020567:Fetal Weight; D005865:Gestational Age; D006801:Humans; D011247:Pregnancy; D012680:Sensitivity and Specificity; D016216:Ultrasonography, Prenatal