Ultrasonographic Study of Developmental Dysplasia of the Hip. Results of Pavlik Harness in Developmental Dysplasia of the Hip.:Results of Pavlik Harness in Developmental Dysplasia of the Hip

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We performed ultrasonography on 12 cases of developmental dysplasia of the hip before treatment with the Pavlik harness and evaluated the relation between ultrasonography findings and the results of the treatment. All were unilateral cases and the average age at the initial treatment with the Pavlik harness was 3 months. Reduction was obtained by the initial application of the Pavlik harness in 8 cases, and by re-application in 2 cases. Reduction was not obtained in 2 cases. According to Graf's classification, 3 cases belonged to type II c, 6 cases to type D, and 3 cases to type III. All 3 cases of type II c and 5 cases of type D were successfully reduced by the initial application of the Pavlik harness, and 1 case of type D was successfully reduced by the reapplication of the Pavlik harness. On the contrary, 2 cases of type III were not reduced by the Pavlik harness, and in the 1 case of type III that was reduced by the re-application of the Pavlik harness, irregularity of the femoral epiphysis in the plain radiogram occurred later. It can therefore be concluded that treatment with the Pavlik harness may not be suitable for type III cases and above.
西日本整形・災害外科学会の論文