Retrospective analysis of complications associated with retrobulbar bupivacaine in dogs undergoing enucleation surgery |
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| Institution: | 1. Department of Surgical Sciences, School of Veterinary Medicine, University of Wisconsin – Madison, Madison, WI, USA;2. Department of Biostatistics and Medical Informatics, University of Wisconsin – Madison, Madison, WI, USA;1. Psychology Department, University of North Georgia, Dahlonega, GA, USA;2. Veterinary Referral Surgical Practice, Roswell, GA, USA;3. Department of Small Animal Medicine and Surgery, College of Veterinary Medicine, University of Georgia, Athens, GA, USA;1. Royal Veterinary College, Department of Veterinary Clinical Sciences, London, UK;2. Universite de Montreal Faculte de medicine, Montreal, QC, Canada;3. Anderson Moores Veterinary Specialists, Winchester, UK;4. Davies Veterinary Specialists, Higham Gobion, Hertfordshire, UK;1. Veterinary Emergency & Referral Group, Brooklyn, NY, USA;2. Department of Molecular Biomedical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, NC, USA;1. Department of Anesthesiology, Botucatu School of Medicine, UNESP – Universidade Estadual Paulista, Botucatu, SP, Brazil;2. Department of Animal Science, Araçatuba Veterinary School, UNESP – Universidade Estadual Paulista, Araçatuba, SP, Brazil;3. Department of Clinical, Surgery and Animal Reproduction, Araçatuba Veterinary School, UNESP – Universidade Estadual Paulista, Araçatuba, SP, Brazil |
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| Abstract: | ObjectiveTo investigate complications associated with, and without, bupivacaine retrobulbar local anesthesia in dogs undergoing unilateral enucleation surgery.Study designRetrospective, observational study.AnimalsA total of 167 dogs underwent unilateral enucleation surgery via a transpalpebral approach.MethodsRecords from 167 dogs that underwent unilateral enucleation surgery that did (RB) or did not (NB) include retrobulbar bupivacaine anesthesia were reviewed, including anesthetic record, daily physical examination records, surgery report, patient discharge report and patient notes within 14 days of the surgery. Specific complications and severity were compared between RB and NB using the Wilcoxon rank-sum test. A ‘complication burden’ (0–5) comprising five prespecified complications was assigned and tested using rank-sum procedures. Statistical significance was set to 0.05.ResultsGroup RB included 97 dogs and group NB 70 dogs. Dogs in NB had a 17.0 percentage points (points) greater risk for a postoperative recovery complication (38.6% versus 21.6%; 95% confidence interval: 3.0–30.6 points; p = 0.017). There was inconclusive evidence that dogs in group RB had a lower risk of requiring perioperative anticholinergic administration (12.4% versus 22.9%; 10.5 points; p = 0.073). Other complications were similar between groups RB and NB with risks that differed by <10 points. The risk of hemorrhage was similar between groups RB (22.7%) and NB (20.0%) with no significant difference in the level of severity (p = 0.664).Conclusions and clinical relevanceIn this retrospective study, the use of retrobulbar bupivacaine for enucleation surgery in dogs was not associated with an increased risk of major or minor complications. |
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| Keywords: | dog enucleation local anesthetic retrobulbar block |
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