Screening for developmental dysplasia of the hip (DDH) in Greece is being performed according to the guidelines issued by the Institute of Child Health in 2015. Screening strategies include universal clinical screening and selective (based on clinical findings or risk factors) sonographic screening. Clinical examination is performed by neonatologists and paediatricians and findings are recorded in the baby’s Health-Book. Whenever clinical examination is suspicious (however non-specific), children are referred for an ultrasound scan and/or to a (paediatric) orthopaedic surgeon. In the case of a positive clinical examination, children are referred to a (paediatric) orthopaedic surgeon, who treats them, when needed. All types of abduction devices are used for treatment (Pavlik, Tubingen), as well as plaster cast, which is preferred in older babies. There are no official guidelines over the selection of the sonographic method for screening; however, the mostly used technique is Graf’s, according to publications from Greek centers. Training of operators on the sonographic examination technique is carried out during radiology residency, depending on hospital availability/expertise, through seminars with hands-on workshops and/or during fellowships. Radiologists and certified paediatric orthopaedic surgeons are the only ones legally allowed to perform neonatal/infantile hip sonography in Greece. Emphasis on the benefits of universal screening and standardized techniques are increasingly taught and repeated, which may eventually influence the decision-making process and standardize the performance of hip sonography within the next few years.

Hip ultrasound, according to Graf, is a standardized sonographic method for the detection of developmental dysplasia of the hip (DDH) during the neonatal period. Graf established his method during the 1980s in his home country Austria. It was implemented in the Austrian Mother-Child Health Passport in 1992. Since then it served as a general screening method. The aim of this paper is to present the effects of general hip ultrasound screening in Austria by reviewing and analysing the literature of Austrian authors. This article described how the method was further developed and which prerequisites are currently required for a correct diagnosis. Moreover, it reports about the education in ultrasound screening according to Graf in Austria.

Since 1980, when Professor Reinhard Graf developed a novel technique, sonography of the infant hip has played a prominent role in the early diagnosis of developmental dysplasia of the hip (DDH). Brazil is a vast country, and disparities exist among regions and between the public and private health systems. In addition, healthcare professionals often have limited knowledge of DDH, and patients need to be referred to larger urban centers for definitive diagnosis and appropriate treatment. These reasons, and more, may hinder the early diagnosis of DDH. Following the successful implementation of similar neonatal screening programs for other conditions in Brazil, developing a screening program for DDH in Brazil is imperative. Such a program should consider training professionals to use Graf’s technique as a diagnostic procedure. It is recommended that more studies be conducted in every region of the country to provide a broader understanding of the current role of sonography in the screening and diagnosis of DDH in infants in Brazil.

The diagnosis of hip dysplasia has developed very differently in different countries over the last few decades. The development and current situation in Switzerland is described in this paper. In the meantime, early diagnosis by means of Graf hip sonography, corresponding to screening, has been established, although it varies from region to region. The training system for examiners is also clearly regulated. The massive reduction in costly treatments and operations documents the success of the efforts made in Switzerland.

The diagnosis of hip dysplasia has developed very differently in different countries over the last few decades. The development and current situation in Hungary is described in this paper. The Ortolani test is still the gold standard for clinical examination in most regions. Hip sonography is not officially established and is only used occasionally. However, thanks to private initiatives, more and more orthopaedic surgeons are now familiarising themselves with this method and the first courses are being held in accordance with International Interdisciplinary Consensus Committee on DDH Evaluation (ICODE) guidelines. A regional screening with Graf hip sonography was carried out in Szeged. The results of the evaluation impressively demonstrate the efficiency of this method.

This paper provides a review of the years of experience of hip sonography since the first ultrasound (US) course in Italy in 1987. Clinical and US findings were correlated in 1,000 newborns examined consecutively in a study in 1991. Developmental dysplasia of the hip (DDH) was present even in the absence of clinical signs, including the Ortolani sign. The percentage of US diagnosis of DDH in newborns was 2.8%, while instability according to the Ortolani test was present in 0.75%. After recommendations from the American Academy of Pediatrics against universal US screening, early diagnosis decreased from 74.4% in the period 1992–2002 (43,418 hips examined) to 52.7% in 2013–2014 (5,598 hips examined). In order to answer the question of whether early treatment of DDH has better outcomes, the acetabulum maturation was studied in 93 type III hips. The statistical analysis showed a strong dependency (P < 0.001) between the alpha-angle gain and the age at which treatment was started. The first 2 weeks of life is the optimum time for early diagnosis and treatment; after 6 weeks of life, treatment is less effective and the results are less predictable. Furthermore, the role of the labrum and its morphological changes was analyzed in 86 unstable dysplastic hips (13 type D, 49 type III and 24 type IV) in patients with an average age of 53 days (range 1–134 days) at DDH diagnosis and the beginning of treatment. The labrum was never inverted and underwent a statistically significant increase in echogenicity and dimensions with a frequency of 97% and 96% respectively, suggesting the labrum’s stabilizing role. Abnormal findings such as in achondroplasia, cleidocranial dysplasia, other rare osteochondrodysplasias and in coxa vara are underlined. Uncommon findings such as incomplete acetabular bony rim and eccentric position of the femoral head nucleus are also described.

In this review article, newborn hip screening experience in Türkiye was summarized. The nationwide newborn hip screening program was officially initiated in 2013. The program currently includes the ultrasonographic examination of the hips of almost all newborns within the first two months of life. The rate of minor surgical interventions (closed/open reduction and casting) was 0.47 per 1,000 live births in 2015 and was 0.89 per 1,000 live births in 2020. Thus, an increase of 89% in the rate of minor surgical interventions was observed. The rate of major surgical interventions (pelvic/femoral osteotomies) was 0.74 per 1,000 live births in 2015 and was 0.21 per 1,000 live births in 2020. Thus, a decrease of 72% in the rate of major surgical interventions was observed between 2015 and 2020. While minor surgical interventions constituted about 39% of the overall surgical interventions in 2015, this ratio raised to 81% in 2020. Based on the experiences in Türkiye universal newborn ultrasonography (US) hip screening is advocated to lessen the rate of extensive surgeries in developmental dysplasia of the hip (DDH) during childhood and adulthood and to have as many as possible functional hips in the long-term follow-up of patients with DDH.