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Ultrasound and congenital dislocation of the hip. The importance of dynamic assessment
L B Engesaeter1, D J Wilson, D Nag
1Nuffield Orthopaedic Centre, Headington, Oxford, England.
Insights
Dynamic ultrasound assessment effectively predicts hip instability outcomes in newborns. Standard measurements were less reliable, highlighting the importance of dynamic evaluation for early intervention in high-risk infants.
Area of Science:
- Pediatric Orthopedics
- Diagnostic Imaging
- Neonatal Care
Background:
- Hip instability in newborns requires accurate early detection for optimal outcomes.
- Clinical examination is crucial, but objective imaging modalities are needed for confirmation.
- Traditional ultrasound measurements have shown variable reliability in predicting developmental dysplasia of the hip.
Purpose of the Study:
- To evaluate the correlation between clinical assessment, standard ultrasound measurements, and dynamic ultrasound assessment with the three-month outcome of hip instability in high-risk newborns.
- To determine the most reliable ultrasound technique for predicting hip stability at three months of age.
Main Methods:
- Prospective assessment of 100 high-risk newborns using clinical examination and ultrasound.
- Treatment decisions were based solely on clinical findings.
- Children were reassessed at three months with clinical evaluation and pelvic radiography; standard and dynamic ultrasound stability assessments were compared against outcomes.
Main Results:
- No significant correlation was found between standard ultrasound measurements (acetabular depth, femoral head cover) and the three-month outcome.
- Dynamic ultrasound assessment of hip stability demonstrated a significant relationship with the clinical outcome at three months.
- Clinical examination alone guided treatment decisions.
Conclusions:
- Dynamic ultrasound assessment is a valuable tool for predicting hip instability outcomes in newborns.
- Standard static ultrasound measurements are less reliable for predicting long-term stability compared to dynamic assessments.
- Clinical examination remains the primary driver for treatment decisions in neonatal hip instability.
Abstract:
One-hundred newborn children at high risk of hip instability were prospectively assessed clinically and by ultrasound. The decision to treat was based only on the clinical examination. At the age of three months all the children were evaluated clinically and with an anteroposterior radiograph of the pelvis. None of the standard ultrasound measurements of acetabular depth and femoral head cover correlated with the outcome at three months. Dynamic assessment of stability was the only ultrasound technique that had a significant relation with outcome.