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http://dx.doi.org/10.17555/jvc.2016.02.33.1.10

Ischemic Infarcion Model by Middle Cerebral Artery Occlusion using Allogenic Blood Clot in Beagle Dogs  

Kim, Younghwan (College of Veterinary Medicine, Chungnam National University)
Choi, Sooyoung (College of Veterinary Medicine, Chungnam National University)
Lee, Kija (College of Veterinary Medicine, Kyungpook National University)
Han, Woosok (College of Medicine, Konyang University)
Choi, Hojung (College of Veterinary Medicine, Chungnam National University)
Lee, Youngwon (College of Veterinary Medicine, Chungnam National University)
Publication Information
Journal of Veterinary Clinics / v.33, no.1, 2016 , pp. 10-15 More about this Journal
Abstract
The purpose of this study was to establish reproducible ischemic infarction model using allogenic blood clot in beagle dogs and identify induced ischemic lesion after middle cerebral artery occlusion using magnetic resonance imaging (MRI) and histopathologic findings. Twenty eight male beagle dogs with no evidence of neurologic disease were experimented. Allogenic embolus was made using a healthy beagle dog. After internal carotid artery (ICA) was exposure, 16G catheter was introduced through the ICA. The dog was administered 0.3 ml blood clot for 15 seconds followed by 3 ml of saline for 15 seconds. MRI scans were performed with 1.5T to evaluate ischemic lesion at 7 days after middle cerebral artery occlusion procedure. Evaluation parameters of MRI include location, distribution, infarction type, margin, shape, mass effect and intensity of T1-weighted imaging (T1WI), T2-weighted imaging (T2WI), fluid attenuated inversion recovery (FLAIR) sequence, diffusion weighted imaging (DWI) and apparent diffusion coefficient (ADC). On MRI, all dogs (28/28) showed focal or multifocal lesion including telencephalon and thalamus lesions, especially caudate nucleus (24/28). These lesions had well-defined margin from adjacent brain parenchyma, none or mild mass effect and various shape. Most of dogs appeared hyperintensity on T1WI, T2WI, FLAIR, and DWI/ADC, corresponding to chronic infarction. These lesions were histopathologically confirmed atrophic changes and unstained lesion. In conclusion, MRI is the useful method to provide information about ischemic infarction in dogs and the best reproducible ischemic infarction model was developed by using allogenic blood clot.
Keywords
brain infarction; brain ischemic stroke; dogs; magnetic resonance imaging; middle cerebral artery occlusion;
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