[Ultrasonic screening for congenital hip dysplasia].

1200 neonatal hips were examined by ultrasound and 30 dysplastic hips (2.5%) were detected, which required immediate treatment. Almost half of these dysplastic hip joints (1%) did not show any clinical signs of instability and had negative family/obstetrical history. These "silent" cases would not have been diagnosed and would not have got their early therapy without the ultrasound screening. The results of this investigation support the necessity of hipsonographic screening of all newborns.