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Related Experiment Videos

Femoral version and neck shaft angle

F Miller1, M Merlo, Y Liang

  • 1Alfred I. duPont Institute, Wilmington, DE 19899.

Journal of Pediatric Orthopedics
|May 1, 1993
PubMed
Summary

This study compared methods for measuring femoral anteversion, finding that while computed tomography (CT) and ultrasound yield different results, both are reproducible. Ultrasound measurements were consistently higher than CT scans.

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Area of Science:

  • Orthopedics
  • Medical Imaging
  • Anatomy

Background:

  • Femoral anteversion is a critical parameter in assessing hip joint biomechanics.
  • Accurate measurement of femoral anteversion is essential for diagnosing and managing various orthopedic conditions.
  • Existing measurement techniques have limitations, necessitating evaluation of alternative methods.

Purpose of the Study:

  • To compare the accuracy and reproducibility of Kingsley-Olmsted method, computed tomography (CT) scan, and ultrasound for measuring femoral anteversion.
  • To define an anterior flat plane for improved anteversion measurement in specific patient populations.
  • To assess the correlation between physical, ultrasound, and CT-based measurements of femoral anteversion.

Main Methods:

  • Measurements were performed on 24 unpaired, dry femurs using the Kingsley-Olmsted method.

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  • Computed tomography (CT) scans were utilized to measure femoral anteversion of the same specimens.
  • Ultrasound was employed to measure femoral anteversion, with an anterior flat plane defined for specific cases.

    • Main Results:

    • CT scan measurements were approximately 5 degrees less than the Kingsley-Olmsted method.
    • Ultrasound measurements were approximately 5 degrees higher than the Kingsley-Olmsted method.
    • Both CT scan and ultrasound measurements demonstrated good reproducibility and correlated well with the Kingsley-Olmsted method, despite a consistent 10-degree difference between them.

    Conclusions:

    • Ultrasound and CT scans are reproducible methods for measuring femoral anteversion.
    • Ultrasound measurements tend to yield values approximately 10 degrees higher than CT scans.
    • The defined anterior flat plane may aid in anteversion measurement for patients with high neck shaft angles.