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Arthrographic evaluation of developmental dysplasia of the hip. Outcome prediction
J S Liu1, K N Kuo, J P Lubicky
1Mackay Memorial Hospital Taipei, Taiwan.
Insights
Repeat hip arthrograms in young children with developmental dysplasia of the hip can improve outcome classification. This study found repeat imaging significantly upgraded results, guiding treatment recommendations for better outcomes.
Area of Science:
- Orthopedics
- Pediatric Radiology
- Developmental Dysplasia of the Hip
Background:
- Developmental dysplasia of the hip (DDH) is a common pediatric condition.
- Accurate assessment is crucial for effective treatment planning in infants and young children.
- Arthrograms are a key imaging modality for evaluating hip joint anatomy in DDH.
Purpose of the Study:
- To evaluate the utility of repeat hip arthrography in children under 2 years with DDH.
- To assess the correlation between initial and repeat arthrographic findings and long-term radiographic outcomes.
- To refine treatment recommendations based on arthrographic classifications.
Main Methods:
- Retrospective review of 35 hip arthrograms in 33 children (<2 years) with DDH.
- Repeat arthrograms were performed on 11 hips after 6 weeks.
- Classification into 6 types based on medial pooling ratio and acetabular limbus morphology.
- Outcome evaluation using modified Severin's criteria.
Main Results:
- Repeat arthrograms upgraded the classification type in 7 of 11 hips.
- All hips initially classified as Type I showed Severin I results.
- A statistically significant relationship was observed between arthrographic type and radiographic outcomes.
Conclusions:
- Repeat hip arthrography provides valuable information for classifying DDH severity.
- Early surgical intervention, specifically open reduction, is recommended for hips classified as Type VI initially or Type III and above on repeat imaging.
Abstract:
Arthrograms of 35 hips in 33 children less than 2 years of age with typical development dysplasia of the hip were reviewed. After arthrograms were repeated for 11 hips 6 weeks following the initial test, results were classified into 6 types based on medial pooling ratio and morphology of the acetabular limbus. Using modified Severin's criteria for outcome evaluation, 7 of the 11 hips had been upgraded in type. All hips that were classified as Type I by arthrogram had Severin I results. The relation of arthrographic type and radiographic results was statistically significant. Immediate open reduction is recommended in hips classified as Type VI at first arthrogram or Type III and above at repeat arthrogram.