Context: Following spinal cord injury (SCI), early prediction of future walking ability is difficult, due to factors such as spinal shock, sedation, impending surgery, and secondary long bone fracture. Accurate, objective biomarkers used in the acute stage of SCI would inform individualized patient management and enhance both patient/family expectations and treatment outcomes. Using magnetic resonance imaging (MRI) and specifically a midsagittal T2-weighted image, the amount of tissue bridging (measured as spared spinal cord tissue) shows potential to serve as such a biomarker. Ten participants with incomplete SCI received MRI of the spinal cord. Using the midsagittal T2-weighted image, anterior and posterior tissue bridges were calculated as the distance from cerebrospinal fluid to the damage. Then, the midsagittal tissue bridge ratio was calculated as the sum of anterior and posterior tissue bridges divided by the spinal cord diameter. Each participant also performed a 6-minute walk test, where the total distance walked was measured within six minutes. Findings: The midsagittal tissue bridge ratio measure demonstrated a high level of inter-rater reliability (ICC = 0.90). Midsagittal tissue bridge ratios were significantly related to distance walked in six minutes (R = 0.68, P = 0.03). Conclusion/clinical relevance: We uniquely demonstrated that midsagittal tissue bridge ratios were correlated walking ability. These preliminary findings suggest potential for this measure to be considered a prognostic biomarker of residual walking ability following SCI.
|Number of pages||4|
|Journal||Journal of Spinal Cord Medicine|
|State||Published - Mar 3 2020|
Bibliographical noteFunding Information:
Funding Dr. Weber is supported by the Interdisciplinary Research Training in Pain and Substance Use Disorders funded by the National Institute on Drug Abuse under award number T32DA035165. Dr. Elliott is supported by the National Institutes of Health Award R01HD079076. The content is solely the responsibility of the authors and does not necessarily represent the official views of the National Institutes of Health. Conflicts of interest The authors have no conflicts of interest to disclose.
© 2018, © The Academy of Spinal Cord Injury Professionals, Inc. 2018.
- Magnetic resonance imaging
- Spinal cord injury
- Tissue bridge
ASJC Scopus subject areas
- Clinical Neurology