The effects of the standardization degree of hip ultrasonography on the reliability of the diagnosis of developmental dysplasia of the hip
超声检查技术规范化程度对发育性髋关节异常诊断可靠性的影响

Objective To investigate the effect of the standardization degree of hip ultrasonography with the Graf method on diagnosis of developmental dysplasia of the hip(DDH) and influence factors. Methods The hip ultrasonography was performed on 420 hips of 210 infants and classified into three groups based on different visit time,different expertise for the Graf method of performers and different additional equipments for performing the method. Group A,B and C included 70 infants or 140 hips. Before standardizatio...