Variability and connections of parameters characterizing hip dysplasia in 4-7-year-old children

Objective: to identify the variability and contingency of parameters characterizing the structure of the hip joint in children 4-7 years of age, among themselves and with the severity of dysplastic changes in the bone and soft tissue structures of the hip joint. Material and Methods. 132 children aged 4-7 years with dysplasia TBS with different degrees of severity of dysplastic changes (177 joints) were examined. The following characteristics of dysplasia joint were under the study: angular radiological parameters, cartilage defect, electroneuromyographic signs, indicators of the biomechanics of gait. The degree of dysplasia (mild, moderate, severe) was assessed by the method developed by the authors to determine the severity of hip dysplastic changes in points. Results. Light changes in the hip joint were diagnosed in 9 patients aged 4-7 years (15 joints); moderate dysplastic disorders were found in 74 patients (96 joints); pronounced signs of dysplasia were found in 49 patients (66 joints). The coefficient of variation of signs characterizing TDS dysplasia varies from 2.8 to 18.8%. The module of correlation coefficients characterizing the binding force of the studied features is in the range from 0.7 to 0.9. Conclusion. The angular radiological parameters, cartilage defect, electroneuromyographic signs, indicators of the biomechanics of gait characterized by considerable variability and are correlated with strong and close power among themselves and with the degree of dysplastic changes of the bone and soft tissue structures of TBS.