顶颌径/顶臀径比值在早孕期胎儿染色体三倍体筛查中的应用价值

妇产科超声影像学

李颖思¹, 杨昕¹, 潘敏¹, 韩瑾¹, 张丽娜¹, 吴思琪¹, 甄理¹, 李东至¹, 廖灿¹^,^†(

)

Yingsi Li¹, Xin Yang¹, Min Pan¹

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图1 超声检查正中矢状面测量胎儿顶颌长。图a为正常胎儿；图b为三倍体胎儿

图2 测量者1与测量者2的顶颌径长度（PML）/顶臀径长度（CRL）比值的测量重复性分析。图a为测量者1的测量者内误差分析，图b为测量者2的测量者内误差分析，图c为2名测量者间的测量误差分析

图3 11~13⁺⁶周正常胎儿顶颌径长度（PML）正常值曲线：PML（mm）=3.65+0.38×顶臀径长度（CRL）（R²=0.821，P＜0.001）

图4 11~13⁺⁶周正常胎儿顶颌径长度/顶臀径长度（PML/CRL）值正常值曲线：PML/CRL=0.5-9.21×CRL（R²=0.093，P＜0.001）

表1 早孕期不同顶臀径胎儿PML/CRL比值分布趋势

表1 早孕期不同顶臀径胎儿PML/CRL比值分布趋势

图5 11~13⁺⁶周正常胎儿与三倍体胎儿顶颌径长度（PML）曲线图

图6 11~13⁺⁶周正常胎儿与三倍体综合征胎儿顶颌径长度（PML）/顶臀径长度（CRL）曲线图

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