Prediction of fetal weight by ultrasound: the contribution of additional examiners
Prediction of fetal weight by ultrasound: the contribution of additional examiners
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DOI：
10.1046/j.1469-0705.2002.00742.x
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发表时间：
2002-07-01
影响因子：
7.1
通讯作者：
Wolman, I
中科院分区：
文献类型：
--
作者：
Gull, I;Fait, G;Wolman, I
目的评估额外检查员在以下方面的贡献：估计胎儿体重与实际胎儿体重之间的平均差异；估计胎儿体重与实际胎儿体重之间的相关性；估计胎儿体重与实际胎儿体重之间的主要差异(>；10%)的减少。设计三名经验丰富的超声检查员，他们独立测量了39例足月胎儿的双顶径、珠围、腹围和股骨长度。每个检查员都计算了估计的胎儿体重。对胎儿的生物测量进行了分析，以获得检查者之间估计差异的来源。计算每个检查者估计的胎儿体重和实际胎儿体重之间的差异、相关性和主要差异(>；10%)的个数，并分析额外检查者对胎儿体重的贡献。对于三名检查员，估计的胎儿体重与实际胎儿体重之间的平均偏差分别为6.1%、5.9%和6.3%。当两名审查者同时进行评估时，误差降至4.8-5.6%。第三位考官的贡献为零。检查者估计的胎儿体重和实际出生体重之间有7次、8次和9次估计之间的主要差异(>；10%)。两名检查员的估计减少了主要差异的数量，三名检查者的估计进一步减少了估计和实际胎儿体重之间的主要差异数量约50%。结论多名检查者的测量仅对估计和实际胎儿体重之间的平均差异数量有轻微的影响。然而，主要差异的减少(>；10%)在统计和临床上具有重要意义。
Objectives To assess the contribution of additional examiners to: the average discrepancy between estimated and actual fetal weights; the correlation between estimated and actual fetal weights; the reduction in major (> 10%) discrepancies between estimated and actual fetal weights.Design Three experienced sonographers independently measured fetal biparietal diameter, bead circumference, abdominal circumference and femur length in 39 fetuses at term. The estimated fetal weights were calculated for each examiner. Fetal biometric measurements were analyzed to obtain the source of differences in estimations among the examiners. Discrepancy, correlation and number of major (> 10%) discrepancies between the estimated and actual fetal weights were calculated for each examiner, and the contribution of additional examiners was analyzed.Results The differences in measurements of the biparietal diameter and femur length were lower than those of the bead and abdominal circumferences. For each of the three examiners, the average discrepancy between the estimated and actual fetal weights was 6.1%, 5.9% and 6.3%. When the estimation was based on two examiners, the discrepancy decreased to 4.8-5.6%. The contribution of a third examiner was nil. Major (> 10%) discrepancies between estimated fetal weight and actual birth weight were found in seven, eight and nine estimations of the examiners. Estimation by two examiners decreased the number of major discrepancies, and estimation by all three examiners further decreased by approximately 50% the number of major discrepancies between the estimated and actual fetal weights.Conclusion Measurements by multiple examiners changes only slightly the average number of discrepancies between estimated and actual fetal weights. However, the reduction in major (> 10%) discrepancies is statistically and clinically significant.