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Evaluation of Brace Treatment for Infant Hip Dislocation in a Prospective Cohort: Defining the Success Rate and
Vidyadhar V Upasani1, James D Bomar2, Travis H Matheney3
1Rady Children's Hospital, San Diego, California vupasani@rchsd.org.
Insights
Brace treatment successfully treated 79% of infant hip dislocations. Key factors for failure include femoral nerve palsy, static braces, irreducible hips, delayed treatment, right hip location, and Graf-IV classification.
Area of Science:
- Orthopedics
- Pediatric Medicine
- Biomedical Engineering
Background:
- Infant hip dislocation treatment often involves bracing.
- Previous studies were limited to single-center or retrospective designs.
- A need exists for international, multicenter, prospective data on brace treatment efficacy.
Purpose of the Study:
- To evaluate the success rate of brace treatment for infant hip dislocation.
- To identify variables associated with brace treatment failure in a prospective cohort.
- To provide data for informed clinical decision-making and patient counseling.
Main Methods:
- International, multicenter, prospective cohort study.
- Hip dislocations verified by ultrasound or radiography.
- Minimum 18-month prospective follow-up.
- Successful treatment defined as clinical and radiographic hip reduction without surgery.
- Statistical analysis included Mann-Whitney, chi-square, Fisher exact tests, and multivariate logistic regression.
Main Results:
- Brace treatment achieved successful outcomes in 79% (162/204) of dislocated hips.
- Six significant risk factors for brace failure were identified: femoral nerve palsy, static brace use, irreducible hip, treatment initiation after 7 weeks, right hip dislocation, and Graf-IV hip classification.
- The probability of failure increased from 3% (no risk factors) to 100% (4-5 risk factors).
Conclusions:
- Brace treatment is effective for a majority of infant hip dislocations.
- Specific risk factors significantly influence treatment outcomes.
- Understanding these variables is crucial for managing infant hip dislocations and counseling families.
Background:
The use of a brace has been shown to be an effective treatment for hip dislocation in infants; however, previous studies of such treatment have been single-center or retrospective. The purpose of the current study was to evaluate the success rate for brace use in the treatment of infant hip dislocation in an international, multicenter, prospective cohort, and to identify the variables associated with brace failure.
Methods:
All dislocations were verified with use of ultrasound or radiography prior to the initiation of treatment, and patients were followed prospectively for a minimum of 18 months. Successful treatment was defined as the use of a brace that resulted in a clinically and radiographically reduced hip, without surgical intervention. The Mann-Whitney test, chi-square analysis, and Fisher exact test were used to identify risk factors for brace failure. A multivariate logistic regression model was used to determine the probability of brace failure according to the risk factors identified.
Results:
Brace treatment was successful in 162 (79%) of the 204 dislocated hips in this series. Six variables were found to be significant risk factors for failure: developing femoral nerve palsy during brace treatment (p = 0.001), treatment with a static brace (p < 0.001), an initially irreducible hip (p < 0.001), treatment initiated after the age of 7 weeks (p = 0.005), a right hip dislocation (p = 0.006), and a Graf-IV hip (p = 0.02). Hips with no risk factors had a 3% probability of failure, whereas hips with 4 or 5 risk factors had a 100% probability of failure.
Conclusions:
These data provide valuable information for patient families and their providers regarding the important variables that influence successful brace treatment for dislocated hips in infants.
Level Of Evidence:
Prognostic Level I. See Instructions for Authors for a complete description of levels of evidence.
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