[The value of echographic studies in congenital hip dislocation].

Since the studies of R. Graf has echography of the hip replaced the standard X-Rays of the pelvis in the early diagnosis of CDH after birth. The authors report their experience with this technique in 400 newborn children. The technical aspects and results are described. The study is original because the pediatric orthopaedic surgeon does simultaneously the clinical examination under echographic control.