RESUMO
Currently available sonographic growth standards for fetal head size, abdominal size, and limb length are based primarily on studies from white populations. To determine whether these published standards are appropriate for a racially mixed, indigent population, we compared our published data from a middle-class white population with data generated from a black/Hispanic population seen at a county hospital in Houston, Texas. No statistically significant differences were found for any of the following fetal sonographic parameters (20 to 41 weeks): biparietal diameter, head circumference, abdominal circumference, femur length.
Assuntos
Desenvolvimento Embrionário e Fetal/fisiologia , Grupos Raciais , Ultrassonografia , População Negra , Cefalometria , Feminino , Fêmur/embriologia , Idade Gestacional , Hispânico ou Latino , Humanos , Modelos Biológicos , Valor Preditivo dos Testes , Gravidez , Padrões de Referência , Valores de Referência , Análise de Regressão , População BrancaRESUMO
This study was designed to evaluate the accuracy of regression models for menstrual age prediction using single versus multiple fetal ultrasonographic measurements (biparietal diameter, head circumference, abdominal circumference, and femur length). The models tested had been previously developed from a study of middle-class white patients in a private hospital. The current study population consisted of 300 indigent black and Hispanic patients seen in a county hospital. This study demonstrated prospectively that the use of multiple parameters in estimating fetal age offers a significant advantage over any single parameter used alone and that the regression equations developed from a middle-class white population appear to be applicable to fetuses from a population with different socioeconomic and racial characteristics.
Assuntos
População Negra , Idade Gestacional , Hispânico ou Latino , Feminino , Hospitais de Condado , Humanos , Ciclo Menstrual , Métodos , Gravidez , Prognóstico , Estudos Prospectivos , Análise de Regressão , TexasRESUMO
In utero estimates of fetal weight were evaluated prospectively in 109 fetuses with the use of sonographic models developed in a previous study. This report confirms that the best in utero weight estimates result from the use of models based on measurements of head size, abdominal size, and femur length. Since the accuracy of these models (1 SD = 7.5%) is significantly better than those based on measurements of head and body (e.g., biparietal diameter, abdominal circumference), we recommend routine use of such models in obstetric sonography.