A Single Approach to Arthroscopic Reduction and Debridement for Developmental Dislocation of the Hip in 12 Infants
Chao Feng1, Xue-Min Lv1, Shi-Qi Wan1
1Department of Pediatric Orthopedics, Beijing Jishuitan Hospital, Beijing, China (mainland).
Insights
This study shows that arthroscopic reduction and debridement effectively treats developmental dislocation of the hip (DDH) in infants, improving key hip joint measurements and outcomes. The procedure offers a promising solution for DDH management.
Area of Science:
- Orthopedic surgery
- Pediatric orthopedics
- Arthroscopy
Background:
- Developmental dislocation of the hip (DDH) is a significant cause of osteoarthritis in infants and children.
- Irreducible DDH poses challenges for conservative management.
- Early intervention is crucial for optimal long-term outcomes.
Purpose of the Study:
- To evaluate the clinical outcomes of a single-approach arthroscopic reduction and debridement for irreducible DDH in infants.
- To identify intra-articular obstructive factors hindering hip reduction.
- To assess the impact of the procedure on hip joint morphology and stability.
Main Methods:
- Twelve infants with irreducible DDH underwent single-approach arthroscopic reduction and debridement.
- Post-procedure, hips were immobilized in a frog-leg plaster cast with external fixation (6-8 weeks).
- Pre- and post-treatment imaging (MRI/X-ray) analyzed safety angle, femoral head medialization, and acetabular angle.
Main Results:
- Arthroscopic reduction significantly improved DDH signs.
- Identified obstructive factors included round ligament hypertrophy, acetabular fibrous tissue, arthrocapsular constriction, and varus deformity.
- Significant improvements observed: safety angle (18.5° to 53.5°), femoral head medialization (72% to 127%), and reduced acetabular angle (37.5° to 25°).
Conclusions:
- Single-approach arthroscopic reduction and debridement is an effective treatment for irreducible DDH.
- The procedure enhances femoral head medialization and acetabular angle correction.
- This technique improves outcomes when combined with post-operative casting and external fixation.
Abstract:
BACKGROUND Developmental dislocation of the hip (DDH) results in osteoarthritis in infants and children. This study aimed to investigate the effects of a single approach to arthroscopic reduction and debridement on clinical outcome in 12 infants with DDH. MATERIAL AND METHODS Twelve infants with irreducible DDH underwent single approach arthroscopic reduction and debridement followed by the use of a frog-leg position plaster cast with fixed flexion and abduction of the hips combined with external fixation for 6-8 weeks. Magnetic resonance imaging (MRI) or plain X-ray images were analyzed. Intra-articular obstructive factors for reduction were evaluated. The safety angle, medialization rate of the femoral head, and the acetabular angle were measured before and after arthroscopic reduction. RESULTS Imaging showed that the signs of DDH were significantly improved following arthroscopic reduction. Obstructive factors included hypertrophy of the round ligament, fibrous tissue and fat in the acetabular base, arthrocapsular constriction, and varus deformity of the hip. The safety angle was significantly increased following arthroscopic reduction (53.5°) compared with the safety angle before treatment (18.5°) (p<0.05). Medialization of the femoral head was significantly increased (127%) compared with that before treatment (72%) (p<0.05). Arthroscopic reduction significantly reduced the acetabular angle (25°) compared with that before treatment (37.5°) (p<0.05). CONCLUSIONS Single approach arthroscopic reduction and debridement was an effective method for treating DDH that significantly improved the medialization rate of the femoral head, acetabular angle, and the outcome of external fixation when a plaster cast was used with fixed flexion and abduction of the hips.
