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      Prereduction traction for the prevention of avascular necrosis before closed reduction for developmental dysplasia of the hip: a meta-analysis

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          Abstract

          Background and purpose

          Avascular necrosis (AVN) is one of the common complications after closed reduction and hip spica cast for developmental dysplasia of the hip (DDH). Prereduction traction has been used to reduce a dislocated hip or decrease the risk of AVN, but there are conflicting results in prevention effects on AVN. The purpose of this study was to systematically review the current literature and evaluate the effect of prereduction traction in preventing AVN in children with DDH treated by closed reduction through a meta-analysis.

          Materials and methods

          A systematic review of the literature was performed using PubMed and EMBASE with variations of three major terms: 1) hip dislocation; 2) closed reduction; and 3) avascular necrosis. Seven studies that could compare the incidence of AVN between the traction and no-traction group were included. Methodological quality was assessed, a heterogeneity test was done ( p=0.008), and the pooled risk ratios were estimated.

          Results

          The association between traction and AVN was assessed, using data on 683 hips treated by closed reduction. The incidence of AVN in the traction and no-traction groups ranged from 5% to 47.7% and from 0% to 72.7%, respectively. A meta-analysis with a random effects model indicated no significant difference in the incidence of AVN between traction and no-traction groups ( p=0.536).

          Conclusion

          There was insufficient evidence to decide the efficacy of prereduction traction before closed reduction in reducing the risk of AVN in patients with DDH in this meta-analysis. To recommend prereduction traction for the prevention of AVN, long-term follow-up studies considering age, severity of dislocation, and appropriate traction method are needed.

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          Most cited references 36

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          Avascular necrosis of the femoral head as a complication of treatment for congenital dislocation of the hip in young children: a clinical and experimental investigation.

           J Kostuik,  W Dallas,  R Salter (1968)
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            Closed reduction for congenital dysplasia of the hip. Functional and radiographic results after an average of thirty years.

            The functional and radiographic results of closed reduction in 152 congenitally dislocated hips of 119 patients who had been managed between 1938 and 1969 were reviewed retrospectively. The average age of the patients at the time of the reduction was twenty-one months (range, one to ninety-six months). At the time of the latest follow-up evaluation, the average age was thirty-one years (range, sixteen to fifty-six years). The average duration of follow-up was thirty years (range, fifteen to fifty-three years). At the latest follow-up evaluation, the Iowa hip rating averaged 91 points (range, 38 to 100 points) and the Harris hip score averaged 90 points (range, 33 to 100 points). Thirty-five hips were rated Severin Class I; thirty-five, Class II; twenty-eight, Class III; fifty-three, Class IV; and one, Class VI. Disturbance of growth in the proximal end of the femur occurred in ninety-one hips (60 per cent). Eight contralateral hips that had appeared normal also demonstrated disturbance of proximal femoral growth. In many hips, partial physeal arrest could not be determined for ten to twelve years after the reduction. Seventeen hips (twelve patients) had a total replacement when the patients were an average age of thirty-six years (range, nineteen to fifty-three years). Sixty-five hips (43 per cent) had radiographic evidence of degenerative joint disease. Patients who did not have a growth disturbance of the proximal end of the femur or evidence of subluxation tended to function extremely well for many years despite a radiographic result that was less than anatomical. Function tended to deteriorate with time, even in the absence of disturbance of growth in the proximal end of the femur. Despite generally good function at the latest follow-up evaluation, the prognosis for these patients remained guarded.
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              Post-reduction avascular necrosis in congenital dislocation of the hip.

              Twenty-five patients with thirty congenitally dislocated hips in which avascular necrosis developed after closed reduction were followed for an average of thirty-nine years from the time of reduction. Twenty-four of the thirty hips had moderate or severe osteoarthritis and twenty-two of the twenty-five patients had significant pain or loss of function, or both, by the time they were forty-two years old, The deformities produced by avascular necrosis that were related to osteoarthritis included: (1) loss of sphericity of the femoral head, (2) persistent lateral and proximal subluxation, (3) irregularity of the medial part of the femoral head, and (4) acetabular dysplasia. The study suggests that if avascular necrosis develops following closed reduction of a congenitally dislocated hip, attempts should be made to prevent lateral and proximal subluxation of the femoral head and to correct thse abnormalities, if possible, once they occur.
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                Author and article information

                Journal
                Ther Clin Risk Manag
                Ther Clin Risk Manag
                Therapeutics and Clinical Risk Management
                Therapeutics and Clinical Risk Management
                Dove Medical Press
                1176-6336
                1178-203X
                2018
                24 July 2018
                : 14
                : 1253-1260
                Affiliations
                [1 ]Division of Orthopaedic Surgery, Severance Children’s Hospital, Yonsei University College of Medicine, Seoul, Korea
                [2 ]Division of Orthopaedic Surgery, Kpond Children’s Superspeciality Hospital, Aurangabad, India
                [3 ]Biostatistics Collaboration Unit, Medical Research Center, Yonsei University College of Medicine, Seoul, Korea
                [4 ]Department of Orthopaedic Surgery, Hallym Sacred Heart Hospital, Hallym University College of Medicine, Anyang, Korea, pedoskwak@ 123456hallym.or.kr
                Author notes
                Correspondence: Yoon Hae Kwak, Department of Orthopaedic Surgery, Hallym University College of Medicine, 22 Gwanpyeong-ro 170 beon-gil, Dongan-gu, Anyang-si, Gyeonggi-do 14068, Korea, Tel +82 31 380 3774, Fax +82 31 380 3887, Email pedoskwak@ 123456hallym.or.kr
                Article
                tcrm-14-1253
                10.2147/TCRM.S166531
                6063247
                © 2018 Park et al. This work is published and licensed by Dove Medical Press Limited

                The full terms of this license are available at https://www.dovepress.com/terms.php and incorporate the Creative Commons Attribution – Non Commercial (unported, v3.0) License ( http://creativecommons.org/licenses/by-nc/3.0/). By accessing the work you hereby accept the Terms. Non-commercial uses of the work are permitted without any further permission from Dove Medical Press Limited, provided the work is properly attributed.

                Categories
                Original Research

                Medicine

                avascular necrosis, closed reduction, traction, developmental dysplasia of the hip

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