Over the past several years ultrasound has become the main means of early diagnosis of hip dysplasia. The success of this diagnostic test lies in the fact that it is non-invasive, can be performed at a very early age, and can be repeated. Moreover, it has made a more modern nosographic approach to this disorder possible, especially regarding correct orthopedic treatment. The results of the first 1500 patients (3000 hips) examined with ultrasound confirm the validity of our classification, which is based on both anatomical and clinical criteria. When performed correctly, ultrasound examination permits early diagnosis, precise anatomical differentiation, and monitoring of the progress of conservative treatment especially in cases of congenital dislocation treated with the Hoffmann-Pipino harness
