Queratoplastia lamelar em gatos
Data
2019-07-09
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Esta dissertação propõe-se apresentar de forma integrada os principais aspetos relacionados com o transplante de córnea em gatos, com particular realce para a queratoplastia lamelar anterior. Inicia-se esta dissertação com uma descrição macro e microanatómica das estruturas do olho do gato, dando particular destaque à córnea. De seguida, classificam-se e descrevem-se os principais aspectos relacionados com os diferentes tipos de transplante de córnea, destacando as suas particularidades. Esta parte inicial é efetuada como recursos a informação recolhida na literatura. De seguida, apresentam-se e discutem-se dois casos clínicos que cujo tratamento recorreu a transplante de córnea lamelar anterior e que foram acompanhados pelo autor da dissertação durante a parte prática do estágio do Mestrado Integrado em Medicina Veterinária. O primeiro caso é o de um gato de raça indeterminada, de 3 anos de idade e castrado, que apresentava um descemetocélio no olho direito. O segundo caso é o de um gato de raça persa, de 1 ano de idade, macho, fértil, que apresentava sequestro de córnea no olho esquerdo e entropion bilateral das pálpebras inferiores. Ambas as situações foram intervencionadas cirurgicamente com sucesso. A consulta de acompanhamento efetuada um ano após os transplantes lamelares anteriores de córnea efetuados para resolução cirúrgica do descemetocélio e do sequestro revela, em ambos os casos, uma córnea transparente e com o eixo visual livre de obstáculos, com um grau de transparência G4 na classificação de transparência de córnea do Colégio Real Veterinário (RVC CCS-Royal Veterinary College Corneal Clarity Score).
This dissertation proposes to present in an integrated way the main aspects related to corneal transplantation in cats, with particular emphasis on anterior lamellar keratoplasty. This dissertation begins with a macro and microanatomical description of the structures of the cat's eye, giving particular emphasis to the cornea. Next, the main aspects related to the different types of corneal transplantation are classified and described, highlighting their particularities. This initial part is made resorting to the information collected in the literature. Then, two clinical cases that were followed up by the author of this dissertation during the practical part of the Integrated Veterinary Medicine Master's degree and treated with anterior lamellar corneal transplantation are presented and discussed. The first case is that of an indeterminate, 3-year-old, castrated cat with a descemetocele in the right eye. The second case is that of a 1-year-old Persian fertile male cat with corneal sequestration in the left eye and bilateral entropion of the lower eyelids. Both situations were successfully surgically operated. The follow-up visit one year after the anterior lamellar keratoplasties performed for surgical resolution of descemetocele and corneal sequestration reveals in both cases a transparent cornea with an obstacle-free visual axis with a degree of transparency G4 in the classification of the Royal Veterinary College Corneal Clarity Score.
This dissertation proposes to present in an integrated way the main aspects related to corneal transplantation in cats, with particular emphasis on anterior lamellar keratoplasty. This dissertation begins with a macro and microanatomical description of the structures of the cat's eye, giving particular emphasis to the cornea. Next, the main aspects related to the different types of corneal transplantation are classified and described, highlighting their particularities. This initial part is made resorting to the information collected in the literature. Then, two clinical cases that were followed up by the author of this dissertation during the practical part of the Integrated Veterinary Medicine Master's degree and treated with anterior lamellar corneal transplantation are presented and discussed. The first case is that of an indeterminate, 3-year-old, castrated cat with a descemetocele in the right eye. The second case is that of a 1-year-old Persian fertile male cat with corneal sequestration in the left eye and bilateral entropion of the lower eyelids. Both situations were successfully surgically operated. The follow-up visit one year after the anterior lamellar keratoplasties performed for surgical resolution of descemetocele and corneal sequestration reveals in both cases a transparent cornea with an obstacle-free visual axis with a degree of transparency G4 in the classification of the Royal Veterinary College Corneal Clarity Score.
Descrição
Dissertação de Mestrado Integrado em Medicina Veterinária
Palavras-chave
queratoplastia lamelar , gato