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Popliteal angle as an indicator for successful closed reduction of developmental dysplasia of the hip.
Molony, Diarmuid C Harty, James A Burke, Thomas E D'Souza, Lester G
Molony, Diarmuid C
Harty, James A
Burke, Thomas E
D'Souza, Lester G
Advisors
Editors
Other Contributors
Date
2011-04
Date Submitted
Keywords
Other Subjects
Subject Mesh
Acetabulum
Arthrography
Casts, Surgical
Follow-Up Studies
Hip Dislocation, Congenital
Hip Joint
Humans
Infant
Orthopedic Procedures
Range of Motion, Articular
Retrospective Studies
Treatment Outcome
Arthrography
Casts, Surgical
Follow-Up Studies
Hip Dislocation, Congenital
Hip Joint
Humans
Infant
Orthopedic Procedures
Range of Motion, Articular
Retrospective Studies
Treatment Outcome
Planned Date
Start Date
Collaborators
Principal Investigators
Files
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PoplitealAngle.pdf
Adobe PDF, 184.59 KB
Alternative Titles
Publisher
Abstract
To evaluate the use of the popliteal angle as an indicator for successful closed reduction of developmental dysplasia of the hip (DDH) in children with delayed presentation.
29 patients aged 6 to 18 months underwent successful closed reduction for unilateral DDH under general anaesthesia. Using a graduated goniometer, the popliteal angle was measured with the hip abducted within the safe zone (to avoid redislocation and injury to the femoral capital epiphysis) before and after reduction and after 6 weeks of spica casting.
The mean popliteal angles before and after reduction and after 6 weeks of spica casting were 5.1, 37.5, and 17.9 degrees, respectively (p<0.0001, paired t test). Because of discomfort, the spica casts were altered in 3 patients (2 at week 1 and one at week 3).
Reduction of the hip in DDH results in an increased popliteal angle of >20 degree. This may be used to indicate the diagnosis and safe closed reduction.
29 patients aged 6 to 18 months underwent successful closed reduction for unilateral DDH under general anaesthesia. Using a graduated goniometer, the popliteal angle was measured with the hip abducted within the safe zone (to avoid redislocation and injury to the femoral capital epiphysis) before and after reduction and after 6 weeks of spica casting.
The mean popliteal angles before and after reduction and after 6 weeks of spica casting were 5.1, 37.5, and 17.9 degrees, respectively (p<0.0001, paired t test). Because of discomfort, the spica casts were altered in 3 patients (2 at week 1 and one at week 3).
Reduction of the hip in DDH results in an increased popliteal angle of >20 degree. This may be used to indicate the diagnosis and safe closed reduction.
Language
en
ISSN
1022-5536
eISSN
ISBN
DOI
PMID
21519075