Paediatric hip ultrasound: Uncertainties in examination and choice of treatment

Abstract

Purpose In Germany, neonates undergo hip sonography examination using the Graf method during the routine U3 screening examination, performed by consultant physicians four to five weeks after birth, and are referred to specialized orthopaedic departments if there are any uncertainties. This study evaluated the quality of sonographic screening in the outpatient sector and the treatment requirements of referred children. Methods We performed a retrospective analysis of the patient data of 384 neonates collected in consultations performed between April 2016 and April 2019. Results In total, 74% (n = 284) of neonates presented a hip type Ia/b. Treatment (abduction brace or Fettweis cast) was required in 32% (n = 122) of cases. The treatment duration was significantly correlated with age at first presentation (Pearson’s r = 0.678; p = 0.001). The treatment duration for patients aged > 200 days old at first presentation was twice as long as those aged 100 days at first presentation. Patients with public health insurance require referral by a consultant. Developmental dysplasia of the hip as referral diagnosis could not be confirmed in control examination in 64% (n = 132) of cases. Of the public health insured children, 97% (n = 200) were referred through a consultant paediatrician. Conclusion We identified deficits in performing and interpreting the Graf method of ultrasound examination. A total of 64% of referred pathological hips turned out to be physiological configurations in our control examination. The future goal should be to increase anatomical knowledge of the newborn hip and ensure the correct use of Graf ultrasound method. Advanced training courses are recommended and necessary. Level of evidence: IV.