The Impact of the Term of Preliminary Traction and the Age on the Development of Aseptic Necrosis of Caput Femori after Conservative Therapy of Hip Dislocation

摘要

Background. The problem of the therapy of congenital hip dislocation (CHD) in children was always linked with sequlae appearing during and after the therapy. The objective. In this regard the objective of our study was to answer the question if duration of the functional traction effects the frequency of caput femori (CF) aseptic necrosis development and whether the age of CHD initial therapy had an impact on the further prognosis of hip joint (HJ) development as a whole. Materials and methods. We examined 276 patients (319 HJ), who had plaster traction before reduction of CHD. Patients were divided to groups according to age at the time of CHD primary therapy. Results. Out of 319 HJ fifty nine cases had development of CFAN (18%). The lowest parameter was detected in the group of patients from 3 to 6 months in 8%, while the highest one was determined in the age 24036 months, where it was equal to 53%. In cases of preliminary traction more than 3 weeks development of CFAN was equal to 6%. Conclusion. Duration of preliminary traction in conservative therapy of CHD is very important. Prognosis of complete development of HJ was significantly worse in children above 1 compared to those from 3 to 12 months.