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[Incidence and development of noticeable hip findings (a dysplasia complex) in newborn and young infants]
Insights
Early hip dysplasia diagnosis in infants shows low diagnostic value for gluteal fold asymmetry and restricted abduction. Ortolani's sign is positive in 3.0% of neonates, with a high rate of suspected cases indicating potential overdiagnosis.
Area of Science:
- Pediatrics
- Orthopedics
- Neonatal screening
Context:
- Prospective examination of pregnant women and neonates in a DFG (German Research Association) priority program.
- Involves 5338 infants across 20 participating clinics, highlighting variations in diagnostic emphasis.
Purpose:
- To evaluate the diagnostic value of physical examination findings for early detection of hip dysplasia/luxation in neonates.
- To compare diagnostic rates and identify potential overdiagnosis in early infant hip screening.
Summary:
- Asymmetry of gluteal folds was observed in approximately 12% of infants, but with limited diagnostic value for hip dysplasia.
- Restricted abduction was found in 3.4% of newborns and 12.7% by 3-14 weeks. Ortolani's sign was positive in 3.0% of neonates, with hip dysplasia diagnosed in 2.4%.
- A high percentage of suspected cases (12.6%) suggests potential overdiagnosis, even accounting for oblique presentation hips. Data variability across clinics reflects practical diagnostic uncertainties.
Impact:
- Highlights the limitations of common physical examination signs in the early diagnosis of developmental dysplasia of the hip (DDH).
- Suggests a need for refined diagnostic criteria and protocols to reduce overdiagnosis and associated anxieties.
- Provides comparative data against Barlow's study, offering insights into the consistency and reliability of early hip dysplasia screening methods.
Abstract:
Among 5338 infants in a DFG (German Research Association) priority program for prospective examination of pregnant women and neonates, asymmetry of the gluteal folds was found in approx. 12%. However this is of little diagnostic value for early diagnosis of hip dysplasia/luxation. The number of cases of restricted abduction found was even lower: in the period following birth it was 3.4%, from the 3rd to the 14th week. 12.7%. Ortolani's sign, including slightly positive and uncertain findings, was positive in 3.0% of the neonates; a hip dysplasia/luxation was diagnosed in 2.4% of the infants. The high percentage of suspected cases diagnosed, at 12.6%, is indicative of excessive diagnosis, even though this figure may already contain some oblique-presentation hips. Moreover, all the data are rendered relative by the differences in emphasis made by the 20 clinics taking part in the study; as a result the actual state and hence the uncertainty of early diagnosis of a hip dysplasia in practice are faithfully reflected. The results are compared with corresponding figures published by Barlow from a study of 9289 children.