The Evaluation Of Developmental Displasia Of The Hip By Ultrasonography And The Relationship Among Multiple Evaluation Parameters In Infant Hips

Objective To study the ultrasonic scanning methods of normal infant hip and determine whether there is a relationship among the multiple evaluation parameters. To evaluate the sonography characteristics of the hip of the infants.Methods Two-hundred and ten hips of 105 infants were examined with ultrasound.The morphology and structure information of hips were observed,and multiple parameters(angle α,angle β, femoral head percentage of cover,acetabular index, L parameter)were measured. A total of2008 hips of 1004 infants were examined by Graf’s method.Results 1. The normal values of infant hip’s ultrasonic index such as angle α, angleβ, femoral head percentage of cover, acetabular index, L parameter were 67.24°±4.21°,62.92°±6.40°,(61.92±5.52)%,23.04°±2.56°,0.44±0.05,respectively.2.For normal infant hips, angle α had positive correlation with FHC and had negative correlation with angle β、AI、L parameter. 3.The incidence of DDH were higher in female than male,left higher than right.There was significant difference between the incidence of the Han nationality and the Hui nationality infants.4.Angle αhad a positive correlation with age and had a negative correlation with angle β.Angle β had a possitive correlation with age.Conclusion Ultrasonography is a simple and safe method for screening DDH in early stage.Graf’ method could be an early definite and preferred screening method in early diagnosis of Developmental dysplasia of the hip(DDH).FHC、AI、L parameter could help the diagnose of DDH.