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Freiermuth, D., Kretzschmar, M., Bilecen, D., Schaeren, S., Jacob, A.L., Aeschbach, A. and Ruppen, W. (2015) Correlation of (99m) Tc-DPD SPECT/CT Scan Findings and Diagnostic Blockades of Lumbar Medial Branches in Patients with Unspecific Low Back Pain in a Randomized-Controlled Trial. Pain Medicine, 16, 1916-1922. https://doi.org/10.1111/pme.12841

has been cited by the following article:

• TITLE: Association between Magnetic Resonance Imaging and the Result of Medial Branch Blocks

  AUTHORS: Stephan Klessinger, Wolfgang Freund

  KEYWORDS: Zygapophysial Joint, Facet Joint, Spine, Back Pain, Medial Branch Block, Magnet Resonance Imaging, Interventional Pain

  JOURNAL NAME: Pain Studies and Treatment, Vol.5 No.1, January 11, 2017

  ABSTRACT: The aim of this retrospective practice audit was to assess the correlation between painful zygapophysial joints and changes seen in magnetic resonance imaging (MRI). Patients with unilateral pain were tested with controlled medial branch blocks. The MRI scans of patients with a positive response were compared blinded with normal MRI scans. The dimensions of the joint were assessed and osteoarthritis was graded. Fifteen symptomatic patients and 15 asymptomatic patients were included and evaluated. Comparison of the joints showed that the maximum diameter of symptomatic joints was significantly larger, and the grading of osteoarthritis was significantly higher for symptomatic joints. No healthy patient was assigned a grade 3. Grades 2 and 3 were found significantly more often in symptomatic patients. Only one symptomatic joint was assigned grade 0. Grade 0 was found significantly more often in asympto-matic patients. The presented MRI technique has limited value as a diagnostic test for lumbar zygapophysial joint pain. It is not possible to detect a single symptomatic joint. However, the osteoarthritis grading for the lumbar zyg-apophysial joints might be helpful for finding predictors for negative response if the results of the rating are grade zero. Therefore, unnecessary medial branch blocks might be avoided.