Learning Confounds Algometric Assessment of Mechanical Thresholds in Normal Dogs

Veterinary Surgery - Tập 43 Số 3 - Trang 361-367 - 2014
Kevin D. Coleman1, Chad W. Schmiedt2, Kristin A. Kirkby3, Amanda E. Coleman2, Sheilah A. Robertson4, Jon Hash5, B. Duncan X. Lascelles5
1Department of Small Animal Medicine and Surgery University of Georgia College of Veterinary Medicine Athens Georgia
2University of Georgia College of Veterinary Medicine Department of Small Animal Medicine and Surgery Athens Georgia
3Seattle Veterinary Specialists Kirkland Washington
4College of Veterinary Medicine, University of Florida, Gainesville, Florida
5North Carolina State University College of Veterinary Medicine, Center for Comparative Medicine and Translational Research Department of Clinical Sciences, Comparative Pain Research Laboratory Raleigh North Carolina

Tóm tắt

ObjectiveTo perform algometric readings in normal dogs in a design that would assess possible confounding factors.Study DesignProspective study.AnimalsSkeletally mature spayed female, intact male and castrated male retriever or retriever mix dogs without orthopedic or neurologic disease (n = 19).MethodsTwelve common surgical sites were selected for algometric pressure testing. Threshold response was defined as a conscious recognition of the stimulus, and recorded in Newtons. Sites were tested in the same order, and the testing sequence repeated 3 times on each side of the dog. Dogs were tested in the morning and evening of the same day and was repeated 10–14 days later, allowing 4 separate data collections for each dog.ResultsData were analyzed using ANOVA or ANCOVA. When all the data were included in the analysis, dog (P < .0001), order (P < .0001), site (P < .0001), site order (P = .0217), time (P < .0001), day (P < .0001) and repetition (P < .0001) all significantly affected the algometer readings. When only the first reading for each site was included in the analysis, dog (P < .0001), site (P < .0001) and sex (P < .0001) all significantly affected algometer readings.ConclusionThese results suggest that learning occurred over repeated collection time points, with dogs anticipating the stimulus and reacting at lower thresholds.

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Veterinary Surgery

Tập 43 Số 3

361-367

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