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Ineffective hip rotation with Pavlik harness. Prospective study of 35 infant dislocations
V Hunter1, M M Hoffer, L Thomas
1Department of Radiology, University of California, Irvine, Orange 92668.
Insights
The Pavlik harness effectively treated unstable infant hips, with most stabilizing within 3 months. However, some cases required spica casts or open reduction due to limitations in internal rotation.
Area of Science:
- Pediatric Orthopedics
- Developmental Dysplasia of the Hip
Background:
- Developmental Dysplasia of the Hip (DDH) is a common condition in infants.
- Early intervention is crucial for successful treatment outcomes.
Purpose of the Study:
- To evaluate the effectiveness of the Pavlik harness in treating unstable infant hips.
- To identify factors contributing to treatment failure with the Pavlik harness.
Main Methods:
- A cohort of 31 infants (35 hips) with unstable hips were treated with a Pavlik harness.
- Clinical and ultrasound evaluations were performed weekly and monthly, respectively.
- Outcomes included hip stability, need for further intervention (hip spica, open reduction), and reasons for treatment failure.
Main Results:
- 26 out of 35 hips (74%) achieved stability within 3 months.
- 9 hips required reduction with hip spica casting, and 1 of these needed open reduction.
- Treatment failure occurred in 7 infants (9 hips), with reasons including late treatment onset, brace fit/acceptance issues, and the need for internal rotation beyond the Pavlik harness's capability.
Conclusions:
- The Pavlik harness is an effective initial treatment for many unstable infant hips.
- Limitations in achieving necessary internal rotation can lead to Pavlik harness failure.
- Alternative or adjunctive treatments may be necessary for specific cases of DDH.
Abstract:
35 hips in 31 infants diagnosed as unstable were treated with a Pavlik harness and followed by weekly clinical and monthly ultrasound evaluation to determine eventual stability. 26 hips became stable within 3 months, and 9 dislocations required reduction with hip spica placement; 1 of these subsequently required open reduction. Of the 7 infants with 9 hips that failed, 2 children had a late onset of treatment, 2 children had problems with brace fit or family acceptance, and 3 other children had no problem with use of the orthosis. Internal rotation of a degree not possible with the Pavlik harness was required to reduce 4 of these 9 hips. The Pavlik harness is ineffective in some patients because of the need for internal rotation.