Abstract: Objective To invastigate the prevalence rate of developmental dysplasia of the hip in neonates and infants less than six months old in Guangzhou city. Methods From August 2015 to August 2017，the survey of developmental dysplasia of the hip with Graf ultrasound was taken in 9766 cases of neonates and infants less than six months old（19532 hips）in Guangzhou. Results Eighteen （0.09%）cases with DDH were detected，with 13 cases（0.13%）of male and 5 cases（0.05%）of female. The prevalence rate of female was significantly higher than that of male（P<0.05）. The detection rate of DDH of infants with breech presentation（0.35%）was higher than those with other position（0.08%）（P<0.05）. The detection rate of DDH of infants with family history（0.22%）was higher than those with no family history（0.07%）（P<0.05）. The detection rate of DDH of infants with abnormal examination was higher than those with normal examination. Conclusion The prevalence rate of developmental dysplasia of the hip in neonates and infants less than six months old in Guangzhou district is 0.09% . Female ， family history，breech presentation，abnormal ones in examination，has higher prevalence rate than male，those with no family history，non-breech presentation，normal ones in examination individually， which suggests special monitoring.

Key words: ultrasound, infants, developmental dysplasia of the hip

摘要： 目的 研究广东省广州市新生儿及小于6月婴儿发育性髋关节发育不良（DDH）患病率情况，以指导临床治疗和预防。方法 2015年8月至2017年8月，Graf超声对广州市9766（19532髋）名新生儿及小于6月婴儿进行DDH普查。结果 检出可疑髋关节1370个，占7.01%，异常髋关节（DDH）18个，占0.09%，其中女婴DDH髋检出13个（0.13%），男性5个（0.05%），女性DDH患病率明显高于男性（P<0.05）。臀位产婴儿DDH检出率0.35%，明显高于非臀位产婴儿DDH髋检出率0.08%（P<0.05）。有家族史的DDH检出率为0.22%，明显高于无家族史的DDH检出率0.07%（P<0.05），体检髋关节可疑者DDH检出率为0.2%，明显高于体检髋关节为正常者DDH检出率。结论 广州市新生儿及小于6月婴儿DDH患病率为0.09%，女性、臀位产、家族史的DDH发病率高，应重点监控。

关键词: 超声, 发育性髋关节发育不良 , 婴幼儿