Conflict of interest The authors have stated explicitly that there are no conflicts of interest in connection with this article.
MAIN RESEARCH ARTICLE
Ultrasound weight estimation of large fetuses
Article first published online: 22 AUG 2012
© 2012 The Authors Acta Obstetricia et Gynecologica Scandinavica© 2012 Nordic Federation of Societies of Obstetrics and Gynecology
Acta Obstetricia et Gynecologica Scandinavica
Volume 91, Issue 10, pages 1218–1225, October 2012
How to Cite
LINDELL, G., KÄLLÉN, K. and MARŠÁL, K. (2012), Ultrasound weight estimation of large fetuses. Acta Obstetricia et Gynecologica Scandinavica, 91: 1218–1225. doi: 10.1111/j.1600-0412.2012.01495.x
Please cite this article as: Lindell G, Källén K, Maršál K. Ultrasound weight estimation of large fetuses. Acta Obstet Gynecol Scand 2012; DOI: 10.1111/j.1600-0412.2012.01495.x.
- Issue published online: 18 SEP 2012
- Article first published online: 22 AUG 2012
- Accepted manuscript online: 4 JUL 2012 08:05AM EST
- Received: 21 March 2012 , Accepted: 12 June 2012
- Fetal weight estimation;
- fetal macrosomia;
- two-dimensional ultrasound;
- three-dimensional ultrasound;
- maternal bodyweight
Objective. To compare the accuracy of fetal weight estimation in large fetuses using four ultrasound formulae. Design. Prospective comparative study. Setting. University Hospital, Lund, Sweden. Population. Large-for-gestational age fetuses (n= 114) at a routine ultrasound examination in the third trimester. Methods. The Persson & Weldner two-dimensional formula was compared with the Hart et al. two-dimensional formula incorporating maternal weight and with the Lee et al. and Lindell & Maršál three-dimensional formulae. The formulae are based on two-dimensional measurements of fetal head, abdomen and femur, and three-dimensional volumetry of fetal abdomen and thigh. Main outcome measures. Accuracy in detection of fetuses with birthweight >4000 and >4500 g. Results. For fetuses >4000 g, the Lindell & Maršál three-dimensional formula showed significantly smaller mean absolute percentage error than the Persson & Weldner two-dimensional and the Lee et al. three-dimensional formulae (p= 0.04 and p < 0.001, respectively). No significant difference between the Lindell & Maršál three-dimensional and the Hart et al. two-dimensional formulae was found. A receiver operating characteristic curve showed a higher detection rate for fetuses with birthweight >4500 g using a three-dimensional compared with a two-dimensional technique. The best performance in detecting fetuses with birthweight >4500 g was given by the Lindell & Maršál three-dimensional formula; for estimated fetal weight >4300 g, the detection rate was 93% and false-positive rate 38%. Conclusions. The ability to detect macrosomic fetuses in a preselected high-risk group was higher using fetal weight estimation with a three-dimensional compared with a two-dimensional ultrasound technique, with or without the inclusion of maternal weight.