Accuracy of Intrapartum Birth Weight Estimation by Clinical Equation in Low Risk Thai Term Pregnant Women
Objectives: To assess the accuracy of clinical equation in estimation of birth weight in Thai term pregnant women and to compare with abdominal palpation method.Materials and Methods: This cross-sectional study was conducted in 335 term pregnant Thai women who were admitted for delivery at S...
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| Format: | Article |
| Language: | English |
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The Royal Thai College of Obstetricians and Gynaecologists
2017-12-01
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| Series: | Thai Journal of Obstetrics and Gynaecology |
| Subjects: | |
| Online Access: | https://tci-thaijo.org/index.php/tjog/article/download/67206/86567/ |
| Summary: | Objectives: To assess the accuracy of clinical equation in estimation of birth weight in Thai term pregnant women and to compare with abdominal palpation method.Materials and Methods: This cross-sectional study was conducted in 335 term pregnant Thai women who were admitted for delivery at Siriraj Hospital during February 2015 to December 2015. Singleton vertex presented pregnancies were estimated for fetal weight using abdominal palpation and Buchmann, et al. equation [100 x (symphysis-fundal height (cm) - 5)] plus 100 if head engaged. After delivery, the accuracy within ten percent of actual birth weight was calculated and compared between two methods.Results: Overall accuracy within ten percent of actual birth weight was similar between methods. The accuracy of Buchmann equation and abdominal palpation method were 64.6% and 60.3% (p = 0.218) and the mean absolute percentage errors were 8.7 ± 7.0 and 9.3 ± 6.8 respectively. In the normal birthweight group (2,500-3,999g), Buchmann equation was more accurate than abdominal palpation method (p = 0.045). In detecting macrosomia, abdominal palpation method had higher sensitivity than Buchmann equation, but without statistical significance (83.3% vs. 33.0%; p = 0.079) using 3,500g cut-off value.Conclusion: Overall accuracy between Buchmann equation and abdominal palpation method was similar. Thus, practitioners who are lack of skills can use Buchmann equation to gain experience. Although Buchmann equation demonstrated better accuracy in the normal birth weight group, it was shown to be less accurate in extreme birthweights. Therefore, other methods for estimation of fetal weight are useful for prediction in extreme groups. |
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| ISSN: | 0857-6084 0857-6084 |