Lidieth Martinez-Martinez
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Jose Domingo Perez-Perez
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Jose Luis Soto-Hernandez
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Roberto Corona-Cedillo
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Ernesto Roldan-Valadez
Background:
The two of the most common indications for magnetic resonance (MR) imaging of the cervical
spine include acute spine trauma and degenerative disease.
Objective:
We aimed to correlate the measurements of the free area of the spinal canal (FASC), a new approach to the
cervical spinal canal compromise, with the Torg´s ratio quantification of the cervical spine.
Methods:
Cross-sectional study including 50 cervical-spine MR evaluations of patients with acute cervical trauma or degenerative disease. We used multivariate analysis of covariance (MANCOVA) to identify the type of lesion, intervertebral
level and gender differences between FASC and Torg´s ratio quantification of the cervical spine; age was the controlled
covariate. Correlates between FASC and Torg´s ratio were obtained at each intervertebral level.
Results:
There was a non-significant interaction between the type of lesion, gender and intervertebral levels between
FASC and Torg´s ratio measurements, F (8, 456) 0.260, p = .978; Wilks' Lambda 0.991; with a small effect size (partial η2
= .005). Among the main effects, only the gender was statistically significant: F (2, 228) = 3.682, p = .027. The age (controlled covariate) was non-significantly related to FASC and Torg´s ratio quantification: F (2, 228) = .098, p = .907. The
Pearson´s correlation coefficient depicted a poor, non-significant agreement between FASC and Torg´s ratio.
Conclusions:
FASC provide an integrative evaluation of the cervical spinal canal compromise in acute, cervical spine trauma and degenerative disease. Further observations and correlation with specific neurological symptoms,
surgical findings and outcome are necessary to assess the usefulness of FASC in clinical settings.