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Population reference range for developmental lumbar spinal canal size.

James F Griffith1, Junbin Huang1, Sheung-Wai Law2

  • 1Department of Imaging and Interventional Radiology, Prince of Wales Hospital, The Chinese University of Hong Kong, Hong Kong, China.

Quantitative Imaging in Medicine and Surgery
|January 17, 2017
PubMed
Summary
This summary is machine-generated.

Normal lumbar spinal canal size varies significantly. This study establishes a reference range for developmental spinal canal dimensions, aiding in the objective diagnosis of spinal stenosis.

Keywords:
Lumbar spinecomputed tomography (CT)developmental stenosispopulationreference rangespinal canal

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Area of Science:

  • Radiology
  • Anatomy
  • Orthopedics

Background:

  • Significant variability exists in normal developmental lumbar spinal canal dimensions.
  • Spinal canal development is complete by age 17.
  • Understanding developmental size is crucial for assessing neural compromise.

Purpose of the Study:

  • To establish a population reference range for developmental lumbar spinal canal dimensions.
  • To enable objective assessment of developmental lumbar spinal canal stenosis.

Main Methods:

  • 1,080 ambulatory patients (540 males, 540 females) undergoing abdominopelvic CT were analyzed.
  • Semi-automated computerized methods measured spinal canal cross-sectional area (CSA), depth, and width at L1-L5.
  • Patient height, weight, and vertebral body CSA were also recorded.

Main Results:

  • A reference range for lumbar spinal canal dimensions was developed for each sex and lumbar level.
  • Spinal canal CSA showed a 34% variation between quartiles and was smallest at L3.
  • Males had larger spinal canal CSAs, but females had larger relative CSAs compared to vertebral body size.

Conclusions:

  • A population reference range for developmental lumbar spinal canal size has been established.
  • This provides an objective tool for diagnosing developmental lumbar spinal canal stenosis.