Can a single preterm ultrasound accurately predict birth weight in gestational diabetes?

Schwartz, Rachelle; Simmonds, Lisa; Rosenn, Barak

doi:10.3109/14767058.2014.991304

Cited by 5 publications

(3 citation statements)

References 18 publications

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“…This suggests that the clinical method of foetal weight estimation is generally more accurate than the ultrasound method. Whilst our findings are consistent with those reported elsewhere (23,24), the small proportion of low birthweight and macrosomic newborns in our sample warrants caution in the interpretation of the results and suggests that further studies with larger samples and centred on these subpopulations would be necessary. Interestingly, the mean absolute error can be misleading because it is the sum of positive and negative deviations from actual birthweight, thus artificially reducing the difference between actual birthweight and estimated birthweight.…”

Section: Discussionsupporting

confidence: 91%

“…The gestation-adjusted projection (GAP) method was applied to each pregnancy by calculating the ratio between the EFW, at the time of the remote ultrasound, and the median foetal weight for that gestational age by foetal gender (19,24). This ratio was then multiplied by the median birthweight for the gestational age by foetal gender at delivery resulting in the GAP-predicted birthweight.…”

Section: Methodsmentioning

confidence: 99%

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Third trimester ultrasound scan combined with a clinical method for accurate birthweight prediction at term: a cohort study in Spain

Vila‐Candel

Soriano‐Vidal

Castro-Sánchez

2019

Rev. Colomb. Obstet. Ginecol.

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Objetivos: desarrollar y evaluar un modelo predictivo de acuerdo con los parámetros clínicos maternos y la biometría de la ecografía del tercer trimestre, que pueda mejorar el poder de predicción del peso al nacer en el recién nacido a término, en comparación con la estimación calculada por ecografía del peso fetal (PFE) usando la fórmula de Hadlock II.Materiales y métodos: revisión de 1224 mujeres con embarazos únicos que se habían sometido a una ecografía fetal a las 34 semanas (EF). El estudio se realizó en un centro de referencia en Valencia (España) entre enero y diciembre de 2016. Se aplicó un método de proyección ajustada de gestación (PAG) para estimar el peso al nacer para la edad gestacional y sexo fetal en el parto (PFEa). Se creó una regresión multivariante para estimar el peso fetal al nacer (PFErm) mediante variables antropométricas, demográficas, ecográficas y obstétrico-neonatales. Los modelos PFErm y PFEa fueron calculados para comparar sus diferencias respecto al peso real al nacer.Resultados: la proporción de PFErm dentro de < 10 % del peso real al nacer fue mayor que la de PFEa (82 % vs. 65 %, p < 0,001). El error relativo medio en las predicciones de peso fetal mediante el uso PFErm pasó de 6, a 0,9 % (Diferencia de proporciones: 5,7 %; IC 95 %: 5,4-6,0); medias pareadas: p < 0,001, siendo significativamente mejor que la precisión que puede ser obtenida con el método ecográfico. El PFErm superó al método PAG y predice el peso al nacer con un error relativo del 1 %. Para recién nacidos con < 2500 g la proporción de estimaciones del peso real < 10 % del PFErm fue mayor que la del PFEa (20,4 % vs. 16,3 %; p = 0,005). En los recién nacidos con peso normal al nacer (2500-3999 g), la capacidad predictiva para estimar el peso al nacer realizada mediante PFErm fue mejor que la realizada mediante PFEa (84,5 % vs. 65,7%; p < 0,001).Conclusiones: el modelo matemático creado para predecir el peso al nacer mejora la medición rutinaria de la ecografía en el tercer trimestre del embarazo para estimar el peso del recién nacido a término.

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Section: Discussionsupporting

confidence: 91%

Section: Methodsmentioning

confidence: 99%

Third trimester ultrasound scan combined with a clinical method for accurate birthweight prediction at term: a cohort study in Spain

Vila‐Candel

Soriano‐Vidal

Castro-Sánchez

2019

Rev. Colomb. Obstet. Ginecol.

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“…16,20 Most significantly, calculation of EFW using ultrasound is generally overestimated, especially in the population of small fetuses, 12,20 raising concerns regarding increasing levels of obstetric intervention. 21,22 When considering the management of delivery, EFW should be accurate to within 5%, though 10% is considered acceptable, 11,23 thus minimising random error levels is critical. 11,15 The aim of this review was to assess the present accuracy of ultrasound calculation of EFW, identifying the most consistent formula, whilst establishing the key factors currently affecting accuracy.…”

Section: Introductionmentioning

confidence: 99%

The accuracy of ultrasound estimation of fetal weight in comparison to birth weight: A systematic review

2018

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Ultrasound estimation of fetal weight is a highly influential factor in antenatal management, guiding both the timing and mode of delivery of a pregnancy. Although substantial research has investigated the most accurate ultrasound formula for calculating estimated fetal weight, current evidence indicates significant error levels. The aim of this systematic review was to identify the most accurate method, whilst identifying sources of inaccuracy in order to facilitate recommendations for future practice. Seven studies met the inclusion criteria and 11 different formulae were assessed; ultrasound calculation of fetal weight was most commonly overestimated. The Hadlock A formula produced the most accurate results, with the lowest levels of random error. Methods incorporating just two measurement parameters were inconsistent, producing large random errors across multiple studies. Key sources of inaccuracy included difficulties obtaining accurate fetal measurements in late gestation; the remainder were operator dependent, including lack of experience and insufficient training and audit. The accuracy of ultrasound estimated fetal weight has improved in the last decade, though a lack of consistency remains evident. National implementation of a rigorous audit programme would likely improve accuracy further, and increase the confidence and clinical value of the method.

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Maternal Diabetes

Brown¹,

Chang²

2018

Avery's Diseases of the Newborn

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Can a single preterm ultrasound accurately predict birth weight in gestational diabetes?

Abstract: The GAP method is as accurate as term ultrasound in predicting birth weight in gestational diabetes.

Cited by 5 publications

References 18 publications

Third trimester ultrasound scan combined with a clinical method for accurate birthweight prediction at term: a cohort study in Spain

Third trimester ultrasound scan combined with a clinical method for accurate birthweight prediction at term: a cohort study in Spain

The accuracy of ultrasound estimation of fetal weight in comparison to birth weight: A systematic review

Maternal Diabetes

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