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Screening for developmental dysplasia of the hip: from theory to practice. Collaborative Group DDH Project
D Baronciani1, G Atti, F Andiloro
1Divisione Patologia Neonatale-Ospedale di Lecco, Lecco, Italy.
Insights
Evaluating screening models for developmental dysplasia of the hip in newborns revealed challenges. Difficulties in test reproducibility and high follow-up costs impede an optimal screening strategy.
Area of Science:
- Neonatal screening
- Orthopedic diagnostics
Background:
- Developmental dysplasia of the hip (DDH) screening is crucial for early intervention.
- Current screening methods face challenges in reproducibility and sensitivity.
Purpose of the Study:
- To evaluate organizational models for neonatal DDH screening.
- To assess the cost-benefit ratio of different screening approaches.
Main Methods:
- Screening of 4648 neonates using Ortolani-Barlow maneuver and ultrasonography.
- Analysis of screening results across six hospitals in the Lombardy region.
Main Results:
- Variability in positive results due to Ortolani-Barlow test reproducibility issues and low clinical sensitivity.
- High costs associated with follow-up for numerous cases of IIa hip (Graf's system).
- Ultrasound confirmed normal findings in 88% (unilateral) and 75% (bilateral) of IIa hip cases by 69 days.
Conclusions:
- Organizational models for DDH screening vary significantly.
- Challenges in test accuracy and cost-effectiveness impede the identification of a correct screening model.
- Further research is needed to optimize neonatal DDH screening strategies.
Objective:
To evaluate an organizational model for neonatal population screening for developmental dysplasia of the hip.
Methods:
In 4648 neonates born in six hospitals of the Lombardy region, screening for developmental dysplasia of the hip was done using the Ortolani-Barlow maneuver and ultrasonography.
Results:
The frequency of positive results of clinical and ultrasound examinations carried out in the hospitals varied considerably as a result of difficulties in the Ortolani-Barlow test reproducibility and in the low sensitivity of the clinical examination when compared to ultrasonography. Neonatal screening results implied a large number of subjects with a IIa hip, according to Graf's system; as these subjects require follow-up, the cost of this type of screening is high. Ultrasound findings were normal at 69 days of life in 88% and 75% of subjects, respectively, with unilateral and bilateral type IIa hip.
Conclusion:
This study evaluated various organizational models for screening (for different time periods and for selected populations) in relation to the cost-benefit ratio and demonstrated the different problems that still impede identification of a correct screening model.