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Year 2018 - Volume 38, Number 10
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Retina assessment by optical coherence tomography of diabetic dogs, 38(10):1966-1971
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ABSTRACT.- Braga-Sá M.B.P., Barros P.S.M., Jorge J.S., Dongo P., Finkensieper P., Bolzan A.A., Watanabe S.S. & Safatle A.M.V. 2018. Retina assessment by optical coherence tomography of diabetic dogs. [Avaliação da retina de cães diabéticos pela tomografia de coerência óptica.] Pesquisa Veterinária Brasileira 38(10):1966-1971. Laboratório de Investigação em Oftalmologia Comparada, Faculdade de Medicina Veterinária e Zootecnia, Universidade de São Paulo, Avenida Prof. Dr. Orlando Marques de Paiva 87, São Paulo, SP 05508-270, Brazil. E-mail: michellebarbosa@usp.br
Diabetes mellitus is one of the most common endocrine disorders characterized by relative or absolute lack of insulin; this can lead to several ocular manifestations, among them diabetic retinopathy and cataracts. Diabetic retinopathy (DR) is a microangiopathy that involves retinal precapillary arterioles, postcapillary venules, and large vessels, causing them to be functionally and anatomically incompetent. Hyperglycemia seems to be the most probable cause of damage to the retina due to interference in cellular metabolism and transduction processes. The aim of this study was to evaluate retinal thickness in eight diabetic dogs, four females and four males of different breeds and ages ranging from 6 to 15 years, by optical coherence tomography (OCT) and to compare them with non-diabetic dogs. Assessment provided by OCT in diabetic dogs showed retinal layers thinning and loss of stratification when compared to non-diabetic dogs (198µm versus 219µm respectively), with statistical significance (p=0.008). OCT images may suggest that diabetes mellitus causes retinal neuropathy in dogs, as also seen in diabetic humans. |
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