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Accuracy of sonography to predict estimated weight in fetuses with gastroschisis.
MedLine Citation:
PMID:  23091245     Owner:  NLM     Status:  In-Data-Review    
Objectives- The purpose of this study was to determine whether sonographic formulas for estimating fetal weight are as accurate for fetuses affected with gastroschisis as they are for healthy fetuses. We hypothesized that because the most commonly used Hadlock formulas rely on the abdominal circumference as a biometric variable, estimates of birth weight are less reliable in fetuses with gastroschisis than in healthy fetuses. Methods- We performed a chart review of all fetuses with a prenatal diagnosis of gastroschisis at 3 tertiary care institutions from 1990 to 2008. Charts were reviewed for clinical and sonographic data. The estimated fetal weight at the prenatal sonogram closest to delivery was compared to the birth weight. Published Hadlock formulas using 4 biometric parameters were used to calculate the estimated fetal weight. Data analysis was performed using the Student t test and χ(2) test for continuous and categorical variables, respectively. Results- One hundred eleven patients with gastroschisis were identified. Sixty-six patients had a prenatal sonogram with a calculated estimated fetal weight within 7 days of delivery; 88 patients had a sonogram within 14 days. The mean birth weights ± SD were 2292 ± 559 and 2477 ± 531 g in the 0- to 7- and 8- to 14-day groups, respectively. Sonographic biometric measurements underestimated the birth weight by an average of 5.6%. Intrauterine growth restriction was predicted in 72% of all pregnancies but was only present in 52%. Conclusions- Our study shows a systematic error of birth weight underestimation when using the Hadlock formulas in fetuses affected with gastroschisis.
Sonia R Adams; Sara Durfee; Courtenay Pettigrew; Daniel Katz; Russell Jennings; Jeffrey Ecker; Michael House; Carol B Benson; Adam Wolfberg
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of ultrasound in medicine : official journal of the American Institute of Ultrasound in Medicine     Volume:  31     ISSN:  1550-9613     ISO Abbreviation:  J Ultrasound Med     Publication Date:  2012 Nov 
Date Detail:
Created Date:  2012-10-23     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8211547     Medline TA:  J Ultrasound Med     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1753-8     Citation Subset:  IM    
Department of Obstetrics and Gynecology, Division of Maternal-Fetal Medicine, Tufts Medical Center, 800 Washington St, Boston, MA 02111 USA.
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