PSOAS TENOTOMY IN SLOW REDUCTION OF HIGH CONGENITAL DISLOCATION

Purpose of the study The aim of this study was to relate the efficacy of cutting the psoas tendon in case of high congenital hip dislocation treated by slow reduction according to Somerville-Petit. Material Twe nty psoas tenotomies were realised between 1982 and 1992. The average age was 11 months 15 days old, they were 15 girls and 5 boys. Among th em, only 9 patients had never been treated. Method By a short surgical approach close to the lateral lip of Scarpa's triangle, we cut the ps oas tendon at the musculotendinous junction doing this suppresses the obstacle that interferes with the femoral head coming down. Results Re sults have been evaluated on clinically and especially radiologically, All hips remain stable except one case. A graduated subluxation of th e hip occured after removal of the plaster. 18 hips have been revised between the third and fifth year. Clinical results were excellent, on radiological controls 5 hips were considered flawless, 11 satisfying, and 2 were imperfect. Only 2 children have been seen ten years later w ith excellent clinical and radiological results. Discussion The hypert rophic psoas tendon interposes between the femoral head and the acetab ulum creasing the capsule and the limbus. Cutting tendon of the psoas will decrease the numerous unexplained failures that occured during sl ow reduction according to Sommerville-Petit method. The use of these s urgical techniques may make more outstanding the tenotomies time. Conc lusion Tenotomy of the psoas tendon realized by a short surgical appro ach without any articular effraction, allowed us to obtain complete re duction of the hips dislocation in these 20 patients.