Measurement error in assessment of vertebral rotation using the Perdriolle torsionmeter

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57 Citations (Scopus)

Abstract

The Perdriolle torsionmeter assesses vertebral rotation on a spinal radiograph. It is frequently used to measure improvement in spinal derotation following Cotrel-Dubousset instrumentation for scoliosis. In this study, intraobserver and interobserver measurement error was examined during use of the torsionmeter. Intraobserver error was as follows: 53% of the measurements were accurate to within 5°, and 21% erred greater than 10°. Error from the actual value averaged 6°. Interobserver error was as follows: Among six observers, only one third of the radiographs had measurements within 5° of each other. Another one third erred by more than 10°. Because of this significant intraobserver and interobserver error, precise measurements of rotation using the torsionmeter cannot be expected. Efforts to quantify spinal derotation with the torsionmeter after Cotrel-Dubousset instrumentation may not be valid.

Original languageEnglish (US)
Pages (from-to)513-517
Number of pages5
JournalSpine
Volume17
Issue number5
StatePublished - 1992

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Keywords

  • error
  • measurement
  • torsionmeter
  • vertebral rotation

ASJC Scopus subject areas

  • Physiology
  • Clinical Neurology
  • Orthopedics and Sports Medicine

Cite this

Measurement error in assessment of vertebral rotation using the Perdriolle torsionmeter. / Richards, B. S.

In: Spine, Vol. 17, No. 5, 1992, p. 513-517.

Research output: Contribution to journalArticle

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