[Problems in sonography of the hip (standardized recording technic, measurement errors, therapeutic consequences)].

Classification of disturbances of maturation of the hip by sonography necessitates a standardized recording technique. The possible ways of reproducing a cross-sectional plane through the acetabulum are illustrated and discussed. In the second section possible errors in establishing the lines of measurement are demonstrated and their causes explained. As the authors' experience with over 14.500 hips of infants shows, hip sonography provides completely new insights into the pathomechanism of the luxation process, making it easier than ever to select therapeutic methods appropriate for the maturation disorder in question and the age of the infant.