Related Experiment Videos
Development and growth of immature hips
1Children's Hospital Zagreb, Croatia.
Insights
Early ultrasound screening for hip development disorders in infants is crucial. Prompt Pavlik harness treatment effectively corrects immature hip development, preventing developmental dysplasia of the hip.
Area of Science:
- Pediatric Orthopedics
- Developmental Biology
- Medical Imaging
Background:
- Immature hip development, specifically type IIa+ hips, requires careful monitoring.
- Developmental Dysplasia of the Hip (DDH) risk factors necessitate early detection.
- Ultrasound is a key tool for assessing acetabular development in infants.
Purpose of the Study:
- To investigate the progression of bony acetabular development in type IIa+ immature hips.
- To evaluate the efficacy of ultrasound follow-up in identifying hip development abnormalities.
- To assess the treatment outcomes for infants with evolving hip dysplasia.
Main Methods:
- Ultrasound evaluation of alpha and beta angles in 900 infant hips.
- Tracking hip development from one to two months of age.
- Utilizing the Pavlik harness for treatment of identified hip abnormalities.
Main Results:
- 15% of type IIa+ hips transformed into type IIa- by two months.
- Infants with type IIa- hips had a statistically significant increased risk (17x) for DDH.
- Pavlik harness treatment for an average of two months normalized alpha and beta angles.
Conclusions:
- Sonographic follow-up is essential for all newborns and infants with hip development disorders.
- Early detection and intervention enable appropriate therapeutic and prophylactic measures.
- Consistent monitoring ensures optimal acetabular development and prevents DDH progression.
Abstract:
The authors investigated the development of the bony acetabulum in type IIa+ immature hips using ultrasound follow-up evaluation of the alpha and beta angle. The study comprised 900 hips in one-month old infants. In the initial ultrasound examination the alpha angle measured less than 60 degrees and the beta angle more than 55 degrees. In the second ultrasound examination at the age of two months a discrepancy between the bony and cartilaginous acetabular component was found in 15% of the hips, which means that the type IIa+ hips were transformed into the type IIa-. The infants with type IIa- hips had more than two risk factors for developmental dysplasia of the hip. The statistical relative risk was 17. These hips were treated with the Pavlik harness during two months on average. After treatment all hips had normal values the alpha and beta angles (more than 60 degrees and less than 55 degrees respectively). This study showed that each newborn and infant with a sonographically confirmed hip development disorder has to be included in the follow-up evaluation of acetabular development, which makes it possible to choose the most adequate therapeutic and prophylactic measures.