6个月内婴儿正常髋关节的超声表现

目的探讨6个月内婴儿不同月龄正常髋关节的超声特点及变化情况,为诊断6个月内婴儿髋关节发育不良提供参考。方法对290个正常髋关节进行超声检查,根据月龄分为0~2月组(n=56)、2~4月组(n=130)、4~6月组(n=104)三组,运用Graf法对图像进行测量,对不同月龄组间测量结果进行统计分析。结果超声可清晰显示髋关节形态结构、股骨头及髋臼位置关系。290个髋关节中,97.9%为Ⅰ型,2.1%为Ⅱa型。左右两侧髋关节的α角、β角的差异无统计学意义(F=1.56,P0.05);各月龄段左右两侧髋关节的α角、β角的差异均无统计学意义(F=1.23~2.75,P0.05);而各月龄组正常髋关节α角、β角不年龄组间差异有统计学意义(F=18.72,25.72,P0.05)。结论超声能够良好显示髋关节的形态特点,为婴儿发育性髋关节异常早期确诊及筛查提供参考依据。

Sonographic features of the normal hips in infants less than six months

Objective To evaluate the ultrasound（US）features of the normal hips in infants less than 6 months of age. Methods 290 healthy infants at ages of 0-2 months（56）,2-4 months（130）,4-6 months（104）underwent US examination of the hips.αandβangles were measured using Graf＆#39;s method and statistically analyzed.Results The morphology and relationship between the femoral head and acetabulum were well shown in all infants on US.Of the 290 normal hips,97.9%were type I,and 2.1%were typeⅡa.There was no significant difference in theα-andβ-angles between the right and left hips in the same age groups （F=1.23-2.75,P〉0.05）.The differences inα-andβ-angles among the three age groups were significant（F=18.72,25.72, P〈0.05）.Conclusion Ultrasound clearly depicts the morphology of the normal hips and is useful for early screening of developmental dysplasia of the hips.