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Evaluation of the effects of general anesthesia on the ultrasonographic optic nerve sheath diameter of dogs

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Title: Evaluation of the effects of general anesthesia on the ultrasonographic optic nerve sheath diameter of dogs
Author: Drolet, Christopher
Department: Department of Clinical Studies
Program: Clinical Studies
Advisor: Bateman, Shane
Abstract: The objectives of this study were to investigate the effects of anesthesia on the ultrasonographic optic nerve sheath diameter of dogs. Dogs without signs of elevated intracranial pressure, glaucoma or optic nerve disease were anesthetized and optic nerve sheath diameter was recorded at three time points: following pre-medication, after induction, and prior to discontinuing isoflurane. Mixed model analysis was used investigate the effects of time, anesthetic parameters and patient characteristics on sheath diameters. Fourteen dogs were enrolled. A positive linear relationship was detected between body weight and optic nerve sheath diameter (P < 0.01). Optic nerve sheath diameter increased linearly following induction (P < 0.01), and it decreased when anesthetic duration exceeded 120 minutes (P = 0.01). No other patient or anesthetic parameter affected optic nerve sheath diameter. Optic nerve sheath diameter is affected by body weight and anesthesia, both of which should be considered when serial monitoring is performed.
URI: https://hdl.handle.net/10214/25741
Date: 2021-03
Rights: Attribution-NonCommercial-NoDerivatives 4.0 International


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Attribution-NonCommercial-NoDerivatives 4.0 International Except where otherwise noted, this item's license is described as Attribution-NonCommercial-NoDerivatives 4.0 International