[Echography of the hip in premature infants].

The authors report the data relative to 50 preterm infants with gestational age less than or equal to 34 weeks. The newborns were studied sequentially with clinical and US examination from February 28, 1989 to March 23, 1990 in order to exclude hip dysplasia or dislocation. US examination was carried out according to Graf's technique. All the newborns had another clinical examination at one year of age in order to evaluate their normal walking. Risk factors had poor significance in the studied group of infants.