A PROSPECTIVE CLINICAL TRIAL COMPARING METRIZAMIDE AND IOHEXOL FOR EQUINE MYELOGRAPHY |
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| Authors: | William R. Widmer DVM MS William E. Blevins DVM MS Samuel Jakovljevic DVM MS Michel Levy DVM Robert F. Teclaw DVM PhD Connie M. Han RVT Cheryl D. Hurd RVT |
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| Affiliation: | Department of Veterinary Clinical Sciences, School of Veterinary Medicine, Purdue University, West Lafayette, IN 47906.;Indiana State Department of Health, Indianapolis, IN 46206. |
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| Abstract: | A prospective clinical trial comparing adverse postmyelographic effects and myelographic quality of metrizamide and iohexol was conducted. Using a predetermined, randomized assignment, 24 horses exhibiting neurologic signs were administered either metrizamide (180 mgl/ml) or iohexol (180 mgl/ml) via cerebellomedullary puncture. Each horse was evaluated postmyelographically for adverse effects. Myelographic quality was assessed by a numerical scoring method. Adverse effects were observed more frequently with metrizamide (21) compared with iohexol (6) myelography (p < 0.05). Seizures, intensification of preexisting neurologic signs and prolonged anesthetic recovery were the most common complications after myelography. There was no difference in myelographic quality (p > 0.05). We conclude that iohexol is safer than metrizamide for equine myelography and that quality myelograms can be obtained with either contrast medium. |
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| Keywords: | myelography metrizamide iohexol equine adverse effects myelographic quality |
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