Radiologic Elements Related With the Dynamic Change of Dural Sac Diameter in Lumbar Backbone: A Kinematic MRI Research.
Clin Backbone Surg. 2017 Jul;30(6):E827-E832
Authors: Takahashi S, Lord EL, Hayashi T, Cohen JR, Lao L, Yao Q, Suzuki A, Nakamura H, Wang JC
STUDY DESIGN: It is a cross-sectional radiologic examine.
OBJECTIVE: The aim of this examine was to evaluate radiologic options associated to dynamic adjustments of dural sac diameter utilizing kinematic magnetic resonance imaging.
SUMMARY OF BACKGROUND DATA: It’s well-known that the cross-sectional space of the lumbar spinal canal decreases throughout motion from flexion to extension. Nevertheless, the radiologic traits associated to dynamic adjustments of the lumbar spinal canal haven’t been elucidated.
METHODS: A complete of 453 consecutive sufferers with clinically symptomatic low again ache or radiculopathy have been recruited to bear lumbar kinematic magnetic resonance imaging. The examine individuals consisted of 271 males (60%) and 182 females (40%). The common age was 44.5±12.2 years outdated. We investigated the next measurements at every stage from L3-L4 to L5-S1: dural sac diameter, ligamentum flavum thickness, disk bulge, disk degeneration, angular movement, translational movement, and posterior disk top. The percentages ratios (ORs) for ?2 mm change of dural sac diameter between flexion and extension have been calculated.
RESULTS: The common dural sac diameter was 12.2 mm in impartial, 12.5 mm in flexion, and 11.7 mm in extension, with a mean distinction between flexion and extension of zero.83 mm. The OR of a ?2 mm change in L5-S1 was zero.55 as in contrast with L3-L4. Considerably elevated ORs have been noticed with ?Three mm of ligamentum flavum in impartial (OR: four.05), Three-Three.9 and ?four mm of disk bulge in impartial (ORs: 1.62 and 1.81, respectively), grade IV and V disk degeneration (OR: 2.59 and a couple of.86, respectively), ?eight levels of angular movement (OR: 1.81), and ?2 mm of posterior disk top change (OR: 1.84).
CONCLUSIONS: A number of radiologic traits associated to the dynamic change of dural sac diameter have been demonstrated.
PMID: 27352368 [PubMed – indexed for MEDLINE]