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Type: Journal article
Title: Slipped capital femoral epiphysis: Incidence and clinical assessment of physeal instability
Author: Kallio, P.
Mah, E.
Foster, B.
LeQuesne, G.
Paterson, D.
Citation: Journal of Bone and Joint Surgery, 1995; 77(5):752-755
Publisher: Churchill Livingstone
Issue Date: 1995
ISSN: 0301-620X
Abstract: In an unselected series of 55 cases of slipped capital femoral epiphysis (SCFE) we observed an incidence of 25% of epiphyseal reduction, mostly unintentional. Reduction indicated physeal instability and was associated with an effusion, detected by sonography on admission, and inability to bear weight. The true prevalence of instability may be higher since an effusion was noted in 33 cases (60%) on the initial sonographic assessment. Serial radiographs showed reduction in 12 (22%), with an average change of 15.1 degrees in the head-neck angle. Serial sonography showed reduction in 7 out of 20 cases (35%), with an average change of 3.7 mm in displacement. In two cases reduction was seen on sonography but not on radiography. Of the hips which showed subsequent reduction, 12 had had a bone scan on admission; three showed initial epiphyseal avascularity but only one progressed to symptomatic avascular necrosis. All stable hips had normal epiphyseal vascularity on the initial bone scan. This indicates the importance of injury from the initial displacement in causing avascular necrosis, rather than effusion, vascular compromise or iatrogenic injury from gentle repositioning. Physeal instability in SCFE is common and should be assessed clinically on admission. It is indicated by joint effusion or inability to bear weight. A slip is very unlikely to be unstable in a child able to bear weight and with no sonographic effusion.
Keywords: Femur Head; Hip Joint; Synovial Fluid; Humans; Epiphyses, Slipped; Osteonecrosis; Joint Instability; Prognosis; Sensitivity and Specificity; Chi-Square Distribution; Retrospective Studies; Weight-Bearing; Adolescent; Child; Female; Male
Rights: © 1995 British Editorial Society of Bone and Joint Surgery
RMID: 0030005834
DOI: 10.1302/0301-620x.77b5.7559704
Appears in Collections:Orthopaedics and Trauma publications

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