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Failure to achieve reduction on developmental dysplasia of hip: an ultrasound evaluation
Miao Shi1, Yongguang Ban2, Qinhua Luan2
1Department of Ultrasound, 426111Liaocheng People's Hospital, Liaocheng, Shandong, PR China.
Insights
Ultrasound of the medial hip joint helps assess developmental dysplasia of the hip (DDH) treatment. Acetabular cartilage and labrum position significantly impact Pavlik harness success rates.
Area of Science:
- Orthopedics
- Pediatric Orthopedics
- Diagnostic Imaging
Background:
- Developmental dysplasia of the hip (DDH) is a common pediatric condition.
- Pavlik harness is a standard treatment for DDH.
- Ultrasound of the medial hip joint is underutilized in DDH management.
Purpose of the Study:
- To evaluate the influence of acetabular cartilage, hip joint labrum, and acetabular tissue on DDH reduction.
- To analyze ultrasound findings in DDH patients treated with Pavlik harness.
Main Methods:
- Prospective study of 50 cases (100 hips) with DDH treated by Pavlik harness.
- Graf method ultrasound with a high-frequency linear transducer (L 5-12) was used for assessment.
- Hips were categorized into non-dislocated, reducible, and non-reducible groups based on ultrasound findings.
Main Results:
- Successful DDH reduction was significantly associated with cephalic positioning of acetabular cartilage (p<0.001).
- Cephalic location of the hip joint labrum also correlated with higher success rates (p<0.001).
- Acetabular tissue measurements showed significant differences between non-dislocated, reducible, and non-reducible groups (p<0.001).
Conclusions:
- Acetabular cartilage and hip joint labrum location are critical factors influencing DDH treatment outcomes.
- The degree of hip dislocation and the amount of acetabular tissue are correlated with treatment success in DDH.
Background:
Ultrasound examination of the medial side of the hip joint has been rarely used to evaluate the status of developmental dysplasia of the hip (DDH) in Pavlik harness treatment according to the literature.
Purpose:
To analyze the effects of cartilaginous acetabulum, hip joint labrum, and acetabular tissue on the reduction of DDH.
Material And Methods:
A total of 50 cases (100 hips) were detected by the Graf method with a high-frequency linear transducer (L 5-12), and there were 59 dislocated hips and 41 non-dislocated hips. Patients were treated with a Pavlik harness. Ultrasound examination of the medial side of the hip joint was performed for follow-up. The hip joints were divided into three groups: the non-dislocated group; the reducible group; and the non-reducible group.
Results:
The success rate of reduction was significantly higher when the acetabulum cartilage was located on the cephalic side (chi-square = 28.12, P < 0.001). The success rate was also significantly higher when the hip joint labrum was located on the cephalic side (chi-square = 17.21, P < 0.001). Type III and D had a higher success rate of reduction than type IV (P < 0.001). The pairwise comparison of the measurements of acetabular tissue between the non-dislocated group, the reducible group, and the non-reducible group showed statistical differences (P < 0.001).
Conclusion:
The present study confirmed that the location of acetabulum cartilage and hip joint labrum affected the outcome of treatment. The degree of dislocation and the amount of acetabular tissue were correlated with the success rate of treatment.
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