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227 results on '"Conzemius, Michael G."'

32. Correlation of activity data in normal dogs to distance traveled.

Author

Eskander, Bishoy S., Barbar, Megan, Evans, Richard B., Enomoto, Masataka, Lascelles, B. Duncan X., and Conzemius, Michael G.

Subjects
PEDOMETERS, DOGS, MULTIPLE regression analysis, TREADMILLS, TREADMILL exercise
Abstract

Copyright of Canadian Journal of Veterinary Research / Revue Canadienne de Recherche Vétérinaire is the property of Canadian Veterinary Medical Association and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Published
2020

41. Cryoinsult Parameter Effects on the Histologically-Apparent Volume of Experimentally-Induced Osteonecrotic Lesions

Author

Goetz, Jessica E, Robinson, Duane A, Pedersen, Douglas R, Conzemius, Michael G, and Brown, Thomas D

Subjects
Disease Models, Animal, Dromaiidae, Freezing, Osteonecrosis, Animals, Femur Head, Cryosurgery, Article
Abstract

Investigation of femoral head osteonecrosis would benefit from an animal model whose natural history includes progression to bony collapse of a segmental necrotic lesion. The bipedal emu holds attraction for systematic organ-level study of collapse mechanopathology. One established method of experimentally inducing segmental lesions is liquid nitrogen cryoinsult. Four cryoinsult parameters – hold temperature, freeze duration, freeze/thaw repetition, and thaw duration - were investigated to determine their individual and combined effects on resulting necrotic lesion morphology. 3D distributions of histologically-apparent osteocyte necrosis from 24 emus receiving varying cryoinsults were used to develop univariate and multivariate linear regression models relating resulting necrotic lesion morphology to particular cryoinsult input parameters. These models were then applied to predict lesion size in four additional emus receiving differing input cryoinsults. The best multivariate regression model predicted lesion volumes that were accurate to better than 8% of overall emu femoral head volume. The hold temperature during cryoinsult was by far the most influential cryoinsult input parameter. The utility of this information is to enhance the consistency and predictability of cryoinsult-induced segmental lesion size for the purposes of systematic laboratory studies at the whole-organ level.

Published
2011

43. Habitual Hip Joint Activity Level of the Penned Emu (Dromaius Novaehollandie)

Author

Troy, Karen L.(Reed), Lundberg, Hannah J, Conzemius, Michael G, and Brown, Thomas D

Subjects
Disease Models, Animal, Dromaiidae, Femur Head Necrosis, Animals, Hip Joint, Original Articles, Motor Activity, Biomechanical Phenomena
Abstract

Opthopaedic management of femoral head osteonecrosis remains problematic, partly because of inability to systematically compare treatments in an animal model whose natural history parallels the human in terms of progression to femoral head collapse. recently, it was determined that collapse could be consistently achieved for cryogenically induced osteonecrosis in the emu. toward delineating the comparative hip joint biomechanics of emus versus humans, for purposes of establishing the emu as a model for human femoral head osteonecrosis, habitual hip joint activity level was quantified for a group of seven healthy adult emus housed in an outdoor research pen typical of those used in emu farming operations. the daily number of steps taken, and the time spent with the hips loaded (standing, or squatting/sitting) versus unloaded (recumbent), were quantified from 24-hour videotape recordings, analyzed by four independent observers. The average number of steps taken per day was 9,563, which extrapolates to 1.8 million hip loadings per year, a value that falls in the same general range as seen in normal adult humans. On average, the emus spent 4:05 hours per day idly standing, 2:12 hours squatting/sitting, and 10:44 hours recumbent; they underwent an average of 37 transitions per day between the respective posture/activity states.

Published
2007

50. Proposed Definitions and Criteria for Reporting Time Frame, Outcome, and Complications For Clinical Orthopedic Studies in Veterinary Medicine

Author

Cook, James L., primary, Evans, Richard, additional, Conzemius, Michael G., additional, Lascelles, B. Duncan X., additional, McIlwraith, C. Wayne, additional, Pozzi, Antonio, additional, Clegg, Peter, additional, Innes, John, additional, Schulz, Kurt, additional, Houlton, John, additional, Fortier, Lisa, additional, Cross, Alan R., additional, Hayashi, Kei, additional, Kapatkin, Amy, additional, Brown, Dorothy Cimino, additional, and Stewart, Allison, additional

Published
2010
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