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Evaluation of traditional and novel radiographic vertebral ratios in Great Danes with versus without cervical spondylomyelopathy.
Vet Radiol Ultrasound. 2014 Sep-Oct; 55(5):488-95.VR

Abstract

Great Danes are predisposed to osseous-associated cervical spondylomyelopathy (Wobbler syndrome). The first aim of this prospective study was to compare values measured using previously published intravertebral and intervertebral ratio methods and a novel ventrodorsal ratio method in radiographs of clinically normal and affected Great Danes. The second aim was to determine whether these ratios could be used as predictors of sites of spinal cord compression based on magnetic resonance imaging (MRI). Thirty dogs (15 normal, 15 affected) were prospectively enrolled. Lateral and ventrodorsal radiographs were obtained and six measurements were recorded from C3-T1. For each vertebral location, intravertebral ratios and intervertebral ratios were calculated from lateral views, and the ratio of the distance between the articular process joints vs. vertebral body width (novel ventrodorsal ratio) was calculated from ventrodorsal views. Values for these three ratios were compared, by vertebral location and dog group. Intravertebral and intervertebral ratios did not differ between dog groups. The ventrodorsal ratio was significantly smaller in affected Great Danes at C5-6 (P = 0.005) and C6-7 (P < 0.001). The ventrodorsal ratio was significantly associated with MRI presence of spinal cord compression. For each 0.1 unit increase in this ratio value, there was a 65% decrease in the odds of spinal cord compression being present at that site, independent of vertebral location (P = 0.002). Findings from this study supported use of the novel ventrodorsal ratio as an initial radiographic screening method for Great Danes with suspected cervical spondylomyelopathy.

Authors+Show Affiliations

Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, Columbus, OH, 43210.No affiliation info available

Pub Type(s)

Journal Article
Research Support, N.I.H., Extramural
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

24698393

Citation

Martin-Vaquero, Paula, and Ronaldo C. da Costa. "Evaluation of Traditional and Novel Radiographic Vertebral Ratios in Great Danes With Versus Without Cervical Spondylomyelopathy." Veterinary Radiology & Ultrasound : the Official Journal of the American College of Veterinary Radiology and the International Veterinary Radiology Association, vol. 55, no. 5, 2014, pp. 488-95.
Martin-Vaquero P, da Costa RC. Evaluation of traditional and novel radiographic vertebral ratios in Great Danes with versus without cervical spondylomyelopathy. Vet Radiol Ultrasound. 2014;55(5):488-95.
Martin-Vaquero, P., & da Costa, R. C. (2014). Evaluation of traditional and novel radiographic vertebral ratios in Great Danes with versus without cervical spondylomyelopathy. Veterinary Radiology & Ultrasound : the Official Journal of the American College of Veterinary Radiology and the International Veterinary Radiology Association, 55(5), 488-95. https://doi.org/10.1111/vru.12159
Martin-Vaquero P, da Costa RC. Evaluation of Traditional and Novel Radiographic Vertebral Ratios in Great Danes With Versus Without Cervical Spondylomyelopathy. Vet Radiol Ultrasound. 2014 Sep-Oct;55(5):488-95. PubMed PMID: 24698393.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Evaluation of traditional and novel radiographic vertebral ratios in Great Danes with versus without cervical spondylomyelopathy. AU - Martin-Vaquero,Paula, AU - da Costa,Ronaldo C, Y1 - 2014/04/03/ PY - 2013/11/16/received PY - 2014/01/07/accepted PY - 2014/4/5/entrez PY - 2014/4/5/pubmed PY - 2015/5/28/medline KW - cervical spine KW - dog KW - radiography KW - vertebra KW - wobbler syndrome SP - 488 EP - 95 JF - Veterinary radiology & ultrasound : the official journal of the American College of Veterinary Radiology and the International Veterinary Radiology Association JO - Vet Radiol Ultrasound VL - 55 IS - 5 N2 - Great Danes are predisposed to osseous-associated cervical spondylomyelopathy (Wobbler syndrome). The first aim of this prospective study was to compare values measured using previously published intravertebral and intervertebral ratio methods and a novel ventrodorsal ratio method in radiographs of clinically normal and affected Great Danes. The second aim was to determine whether these ratios could be used as predictors of sites of spinal cord compression based on magnetic resonance imaging (MRI). Thirty dogs (15 normal, 15 affected) were prospectively enrolled. Lateral and ventrodorsal radiographs were obtained and six measurements were recorded from C3-T1. For each vertebral location, intravertebral ratios and intervertebral ratios were calculated from lateral views, and the ratio of the distance between the articular process joints vs. vertebral body width (novel ventrodorsal ratio) was calculated from ventrodorsal views. Values for these three ratios were compared, by vertebral location and dog group. Intravertebral and intervertebral ratios did not differ between dog groups. The ventrodorsal ratio was significantly smaller in affected Great Danes at C5-6 (P = 0.005) and C6-7 (P < 0.001). The ventrodorsal ratio was significantly associated with MRI presence of spinal cord compression. For each 0.1 unit increase in this ratio value, there was a 65% decrease in the odds of spinal cord compression being present at that site, independent of vertebral location (P = 0.002). Findings from this study supported use of the novel ventrodorsal ratio as an initial radiographic screening method for Great Danes with suspected cervical spondylomyelopathy. SN - 1740-8261 UR - https://www.unboundmedicine.com/medline/citation/24698393/Evaluation_of_traditional_and_novel_radiographic_vertebral_ratios_in_Great_Danes_with_versus_without_cervical_spondylomyelopathy_ L2 - https://doi.org/10.1111/vru.12159 DB - PRIME DP - Unbound Medicine ER -