Effect of femur position on the angular measurement of slipped capital femoral epiphysis

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

A femur model was used to simulate a slipped capital femoral epiphysis (SCFE). Wedges were inserted into a cut in the femoral neck to create SCFEs of 25, 50, and 75°. The effects of femur position on the angular measurement of SCFE were studied by taking radiographs of the SCFE at preselected positions of rotation and abduction, which were ensured by a holding device. The views selected were the cross table lateral (CTL), Billing lateral, and frog lateral (FL) projections. FL views were obtained at 22.5, 45, and 67.5° of abduction. The rotational positions were 20° internal, neutral, and 15, 30, 45, and 60° external. Slip angles were measured from these radiographs. The CTL and FL projections accurately portrayed any severity of an SCFE at all positions except for 45 and 60° of external rotation. The Billing view falsely portrayed a severe SCFE at all positions of rotation. The most accurate representation of an SCFE is seen on either the CTL or FL view when the external rotation of the femur does not exceed 30°.

Original languageEnglish (US)
Pages (from-to)488-494
Number of pages7
JournalJournal of Pediatric Orthopaedics
Volume21
Issue number4
DOIs
StatePublished - 2001
Externally publishedYes

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Slipped Capital Femoral Epiphyses
Femur
Anura
Femur Neck
Equipment and Supplies

Keywords

  • Angle measurement
  • Femur position
  • Slipped capital femoral epiphysis

ASJC Scopus subject areas

  • Pediatrics, Perinatology, and Child Health
  • Surgery
  • Orthopedics and Sports Medicine

Cite this

Effect of femur position on the angular measurement of slipped capital femoral epiphysis. / Loder, Randall.

In: Journal of Pediatric Orthopaedics, Vol. 21, No. 4, 2001, p. 488-494.

Research output: Contribution to journalArticle

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