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Avalia??o da resposta cl?nica eletrorretinogr?fica de equinos frente ? utiliza??o de diferentes tipos de eletrodos e tr?s protocolos de seda??o / Clinical evaluation of equines electroretinografic responses, between two different electrodes and four sedation protocolsRosa, Maurilio 24 July 2009 (has links)
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Previous issue date: 2009-07-24 / Ocular eye and adnexa examination is a routine in Veterinary practice. Diagnostic and treat diseases that affect domestic animals site is the main goal of these procedures. The importance of this research was the electrophysiology study of equine retina thru an FullField ERG examination in standing horses intravenouslly sedated, with auriculopalpebral nerve block and corneal topical anesthesia. Protocols and procedures used in clinical ERG were according International Society of Clinical Electrophysiology of Vision (ISCEV) standards. In this study, forty healthy horses were evaluated by FullField ERG. In the present study, 15 males and 25 mares, aging between 2 months to 18 years (m?dian age 4,6 years). Horses were randomly allocated into eight groups according sedative drugs as Xylazine, Romifidine, Detomidine, Medetomidine and corneal electrode ERG-Jet Electrode (ERG-jet), Dowson Trick Litzkow (DTL-plus) types. Group 1 was GXDTL, Group 2 GDDTL, Group 3 GRDTL, Group 4 GMDTL, Group 5 GXERG, Group 6 GDERG, Group7 GRERG, and Group 8 GMERG. In all groups a-b complex amplitude and implicit times were investigated and compared for both eyes. Quality and costs of sedation drugs were estimated. This research leads to the conclusion that was differences between corneal electrodes and ERG-jet showed safer and more practical during ERG examination. There were no difference between drugs sedation effect but Detomidine and Medetomidine showed better results to promote sedation during examination than Romifidine and Xylazine. The sedation protocol using Romifidine showed the lowest cost. / O exame oft?lmico ? uma pr?tica rotineira na Medicina Veterin?ria que objetiva identificar e tratar as afec??es do globo ocular e anexos dos animais dom?sticos. Neste trabalho estudamos a eletrofisiologia da vis?o do eq?ino, atrav?s do exame de eletrorretinografia de campo total, com o uso de seda??o e bloqueio anest?sico, com o animal na posi??o quadr?pede. Para execu??o dos exames, estabeleceu-se um protocolo b?sico de acordo com as normas e recomenda??es do International Society for Clinical Eletrophysiology of Vision (ISCEV), Foram avaliados 40 equinos considerados normais ap?s exame oft?lmico, sendo 15 machos e 25 f?meas, com idade variando entre dois meses a 18 anos (m?dia de 4,6 anos) pelo de exame de Eletrorreninografia de Campo Total e na posi??o qudr?pede. Os animais foram divididos em oito grupos em fun??o do f?rmaco sedativo (Xilazina, Romifidina, Detomidina e Medetomidina), e do tipo de eletrodo utilizados ERG - Jet Electrode (ERG-Jet) e Dowson Trick Litzkow (DTL). Foram ent?o assim denominados; o Grupo 1: GXDTL, Grupo 2: GDDTL, Grupo3: GRDTL, Grupo4: GMDTL, Grupo5: GXERG, Grupo 6: GDERG, Grupo 7: GRERG e o Grupo 8: GMERG. Em todos os grupos mensuraram-se os valores das amplitudes de pico das ondas a e b , seus implicit time , para os olhos direito e esquerdo. Tamb?m foram avaliados o tempo, a qualidade e o custo da seda??o. Conclu?mos que houve diferen?a entre os eletrodos avaliados, e que o eletrodo ERG-jet mostrou-se mais adequado em raz?o da sua seguran?a e praticidade de utiliza??o. As drogas estudadas n?o diferiram entre si quanto aos resultados do eletrorretinograma, por?m a Detomidina e Medetomidina apresentaram um desempenho superior em rela??o ? Romifidina e ? Xilazina na efici?ncia de conten??o e facilita??o do exame. A seda??o com Romifidina foi a que representou menor custo de execu??o.
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