Maternal-Fetal Medicine Division, Department of Obstetrics and Gynecology, Mayo Clinic College of Medicine, Rochester, Minnesota, USA.
Department of Obstetrics and Gynecology, Baylor College of Medicine, Houston, Texas, USA.
J Ultrasound Med. 2019 Jun;38(6):1477-1482. doi: 10.1002/jum.14826. Epub 2018 Sep 23.
The aim of this study was to investigate the reproducibility of a standardized method to assess the ultrasound liver-to-thoracic area ratio in fetuses with congenital diaphragmatic hernia.
We selected 24 images of 9 fetuses diagnosed with left-sided at our institution between January 2010 and December 2017. Eight operators (1 maternal-fetal medicine specialist and 7 sonographers) reviewed the selected images and assessed the ultrasound liver-to-thoracic area ratio according to a standardized protocol. We evaluated the correlation between operators using the intraclass correlation coefficient and compared agreement between the sonographers and a physician with experience in measuring the ultrasound liver-to-thoracic area ratio using a Bland-Altman analysis.
Good intraoperator reproducibility was observed for the standardized ultrasound liver-to-thoracic area ratio (intraclass correlation coefficient, 0.78). Good agreement among sonographers and the physician was also observed for the standardized measurements (bias, 0.01; precision, 0.03; limits of agreement, -0.05 to + 0.07).
We demonstrated that good intraoperator and interoperator reproducibility of ultrasound liver-to-thoracic area ratio assessment is feasible after standardizing the method in our center.
本研究旨在探讨一种评估先天性膈疝胎儿超声肝脏-胸腔面积比的标准化方法的可重复性。
我们选择了 2010 年 1 月至 2017 年 12 月在我院诊断为左侧先天性膈疝的 9 例胎儿的 24 个图像。8 名操作人员（1 名母胎医学专家和 7 名超声科医生）根据标准化方案对选定的图像进行了评估，并使用组内相关系数评估了操作人员之间的相关性，同时使用 Bland-Altman 分析比较了超声科医生与具有测量超声肝脏-胸腔面积比经验的医生之间的一致性。
标准化超声肝脏-胸腔面积比的组内可重复性良好（组内相关系数为 0.78）。超声科医生与医生之间的标准化测量也具有良好的一致性（偏差为 0.01；精度为 0.03；一致性界限为-0.05 至+0.07）。
我们证明了在我们中心标准化该方法后，超声肝脏-胸腔面积比评估具有良好的组内和组间可重复性。
