Effects of topical flurbiprofen sodium, diclofenac sodium, ketorolac tromethamine and benzalkonium chloride on corneal sensitivity in normal dogs
Journal Title: Open Veterinary Journal - Year 2017, Vol 7, Issue 3
Abstract
To evaluate corneal sensitivity by using the Cochet-Bonnet® esthesiometer in normal canine eyes at different time points following instillation of three different topical non-steroidal anti-inflammatory drugs (flurbiprofen sodium 0.03%, diclofenac sodium 0.1% and ketorolac tromethamine 0.5%) and benzalkonium chloride 0.01%. Six healthy mixed breed dogs from the same litter were used in two different stages. First, one drop of flurbiprofen sodium 0.03% and diclofenac sodium 0.1% in each eye; second, one drop of ketorolac tromethamine 0.5% and benzalkonium chloride 0.01% in each eye. Baseline esthesiometry was obtained before eye drop application and every 15 minutes thereafter until a total of 105 minutes of evaluation time. A one-week interval was allowed between the two treatment phases. Statistical analysis was used to compare means according to time of evaluation and drug used. Diclofenac sodium 0.1% decreased corneal sensitivity at 75 and 90 minutes (P > 0.015) with possible interference on neuronal nociceptive activity and analgesic effect while ketorolac tromethamine 0.5% did not show any variation for esthesiometry means along the evaluation. Flurbiprofen sodium 0.03% resulted in increased esthesiometry values 30 minutes after instillation (P > 0.013), increasing corneal sensitivity and possibly producing a greater irritant corneal effect over its analgesic properties. Benzalkonium chloride 0.01% significantly increased corneal sensitivity at 15 minutes of evaluation (P > 0.001), most likely resulting from its irritating effect. Esthesiometry did not allow a definite conclusion over the analgesic effect of the NSAIDs tested; however it was effective in detecting fluctuations in corneal sensitivity.
Authors and Affiliations
Raquel de Araújo Cantarella| Universidade Federal do Paraná (UFPR), Departamento de Medicina Veterinária, Rua dos Funcionários, 1540, Bairro Juvevê, 80035-050, Curitiba – PR, Brazil, Juliana Kravetz de Oliveira| Universidade Federal do Paraná (UFPR), Departamento de Medicina Veterinária, Rua dos Funcionários, 1540, Bairro Juvevê, 80035-050, Curitiba – PR, Brazil, Daniel M. Dorbandt| Department of Veterinary Clinical Medicine, College of Veterinary Medicine, University of Illinois at UrbanaChampaign, 1008, West Hazelwood Drive, Urbana, Illinois 61802, USA, Central Hospital for Veterinary Medicine, North Haven, Connecticut 06473, USA, Fabiano Montiani-Ferreira| Universidade Federal do Paraná (UFPR), Departamento de Medicina Veterinária, Rua dos Funcionários, 1540, Bairro Juvevê, 80035-050, Curitiba – PR, Brazil
Keywords
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