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- Author or Editor: Molly A. Vitt x
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Abstract
OBJECTIVE To describe outcomes for dogs after treatment of craniodorsal hip luxation with closed reduction and Ehmer sling placement and investigate potential risk factors for sling-associated tissue injury or reluxation of the affected hip at or near the time of sling removal.
DESIGN Retrospective multicenter cohort study.
ANIMALS 92 dogs.
PROCEDURES Case information was solicited from 10 veterinary medical facilities through electronic communications. Data on patient demographic information, cause of injury, presence of concurrent injuries, details of Ehmer sling placement and management, and outcome at sling removal were collected. Data were analyzed for associations with outcomes.
RESULTS 40 of 92 (43.5%) dogs had reluxation of the affected hip joint at or near the time of sling removal. Odds of reluxation occurring for dogs that had the initial injury attributed to trauma were 5 times those for dogs without known trauma (OR, 5.0; 95% confidence interval, 1.3 to 18.7). Forty-six (50%) dogs had soft tissue injuries secondary to sling use; 17 of these dogs had injuries classified as severe, including 1 dog that required limb amputation. Odds of severe sling injury for dogs that had poor owner compliance with home care instructions noted in the record, those that had the sling placed by an intern rather than a board-certified surgeon or resident, and those that were noted to have a soiled or wet bandage on ≥ 1 occasion were 12.5, 4.0, and 5.7 times those for dogs without these findings, respectively.
CONCLUSIONS AND CLINICAL RELEVANCE Placement of an Ehmer sling following closed reduction of a craniodorsal hip luxation had a low success rate and high complication rate.
Abstract
OBJECTIVE
To explore relationships between 9-axis inertial measurement unit (IMU) output and activities of varying intensity in dogs of various sizes.
ANIMALS
20 healthy, agility course–trained dogs of various ages and sizes.
PROCEDURES
Height, weight, body condition score, age, length from IMU to the ischium, and height of IMU to the floor were recorded. Dogs performed a series of activities (rest, walk, trot, and agility course) while wearing the IMU device. IMU and video output were reviewed by independent investigators. Correlations and multiple regression models were used to explore relationships between independent variables and IMU output.
RESULTS
Calibration demonstrated excellent correlation and concordance between IMUs (intraclass correlation > 0.9) and that the IMUs reliably measured a known acceleration (gravity at rest). Resultant vector magnitude {sqrt[(x^2) + (y^2) + (z^2)]} normalized to body size was calculated from the data. IMU output clearly discriminates between activities of varying intensity in the dog.
CLINICAL RELEVANCE
The inability to accurately measure chronic pain is a barrier to the development of new, or critical evaluation of, therapeutics. Activity monitors (AM) may be the ideal diagnostic target since they are small and provide objective data that can be collected while the pet remains in its natural environment. These results demonstrate the concurrent and predictive validity of the IMU tested. Our long-range goal is to validate an open-source algorithm for the IMU so activity in a pet’s natural environment can be used as an outcome measure in future studies.
