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《Chinese Journal of Clinical Obstetric and Gynecology》 2000-02
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Study on the estimation of fetal macroeamia

GAO Yonghua,VANG Tingtao,YANG Linqing,Affiliated Hospital of Jining Medical College,Jining 272129,China)  
Objective To Study the estimation of fetal macrosomia. Methods (1) The height of fundus uteri was measured in 408 pregnancies and the best cut off value was studied for the screening regarding as the sensitivity and specificity of fetal macrosomia. (2) The fetal abdominal circumference (AC),transverse cerebellar diameter (CD) and biparietal diameter (BID) were measured by ultrasonography in 176 cases whose height of fundus uteri was not less than the best cut off value. The relationships between AC,CD and BPD with neonatal birth weight were studied. The equation of double factors for estimating fetal weight (FW) was generated by regression analysis. (3) Prospective study of the effect of the generated equation in estimation of fetal macrosomia was performed in 560 cases. Results The cut off value for the screening of fetal macrosomia by the height of fundus uteri was 37 centimeter with the sensitivity and specificity as 88.9% and 66.7% respectivily. The best correlation was between AC and birth weight,while CD was the second. The coefficients of partial corelation were 0.684 54 (P 0.001) and 0.221 52 (P 0.05),respectively. The equation of estimation by using AC and CD was established (FW = 269.6 x AC+ 438.4 x CD-7642.8),the coefficients was 0.67 (P 0.001) . The prospective study in 560 cases showed that the sensitivity and specificity for diagnosising fetal macrosomia were 83.3% and 92.2% ,respectively. The predictive value of the equation was 82.7% . Conclusions The measurement of height of fundus uteri combined with AC and CD is valuable for the estimation of fetal macrosomia.
【CateGory Index】: R714.5
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