Potencial visual evocado por padrão reverso com tabuleiro de xadrez em gatos domésticos adultos

Ferreira, Nathalia Veronica Carneiro; Souza, Elton Hugo Lima da Silva; Silva, Jéssica Karla Alves da; Silva, Valdir Luna da; Souza, Bruno Oliveira Ferreira de; Sá, Fabrício Bezerra de

doi:10.1590/0103-8478cr20140075

Cited by 2 publications

(3 citation statements)

References 16 publications

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“…A previous study demonstrated VEP recording by reverse pattern in 13 adult cats, also without sedation and mydriasis, keeping the animals attentive to the monitor and thus avoiding the recording of nonvisual responses. 20 Results of flash-VEPs in dogs and sheep were reported using mechanical containment. 21 Moreover, it was observed that general anesthesia impairs the recording of cortical signals.…”

Section: Resultsmentioning

confidence: 99%

Grating Visual Acuity in phakic, aphakic, and pseudophakic Poodles

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Eyherabide

et al. 2020

Veterinary Ophthalmology

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Objective To compare the grating visual acuity (VA) measured by visual evoked potentials (VEP) in phakic, aphakic, and pseudophakic Poodles. Animals studied Thirty‐six Poodle dogs aged from 4 to 14 years. Procedures Animals were allocated into three different groups according to their lens status: phakic group (n = 12), aphakic group (n = 12), and pseudophakic group (n = 12). Grating VA was measured in cycles/degree (cpd) in all animals using the electrodiagnosis system Roland RETIport® in a dark room without using any mydriatic, sedative, or anesthetic drugs. Results The mean grating VA in the phakic, aphakic, and pseudophakic groups was 5.9 ± 1.0 cpd (20/102—Snellen equivalent), 2.6 ± 0.7 cpd (20/231), and 5.2 ± 1.1 cpd (20/116), respectively. The VA from aphakic eyes was significantly lower when compared to the phakic and pseudophakic eyes (P < .05). There was no significant difference in VA between phakic and pseudophakic eyes. Conclusions The VEP is a useful tool for the evaluation of grating visual acuity in canines. The study showed that IOL implantation following phacoemulsification results in improved VA as measured by VEP compared to that of the aphakic eye and resulted in VA that was similar to that of the normal eye.

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Section: Resultsmentioning

confidence: 99%

Grating Visual Acuity in phakic, aphakic, and pseudophakic Poodles

Safatle

Moraes

Eyherabide

et al. 2020

Veterinary Ophthalmology

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“…A comprovação da aplicabilidade da técnica em cães, por outros autores (MORENO-CARMONA et al, 2006;SAFATLE et al, 2020) aplicabilidade clínica e que, atualmente, provavelmente não passaria pela aprovação de alguma comissão de ética em uso de animais para experimentação. Um estudo mais recente da aplicação da técnica do PVEPR em gatos reporta não ter usado nenhum tipo de contenção química, valendose exclusivamente de contenção mecânica discreta, concordando com a metodologia aplicada no presente estudo (FERREIRA et al, 2015).…”

Section: Discussionunclassified

“…No presente estudo, os animais avaliados não tiveram a midríase medicamentosa induzida, obedecendo às recomendações da ISCEV (ODOM et al, 2016), com o objetivo de se evitar as aberrações esféricas, que comprometem a capacidade de resolução e consequentemente, de diferenciação dos estímulos de grades. Outros estudos envolvendo PVE de estímulos estruturados concordaram com este princípio e não utilizaram midríase em sua metodologia (MORENO-CARMONA et al, 2006;FERREIRA et al, 2015;SAFATLE et al, 2020).…”

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>b<Mensuração da acuidade visual de cães da raça Cavalier King Charles Spaniel pelo potencial visual evocado de varredura (PVEV)>/b<

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Visual evaluation plays an essential role in the ophthalmic examination in human beings. Some objective techniques are required to achieve gratin visual acuity (VA) in non verbal people, like babies or infants in pre-verbal ages. The Sweep-Visual Evoked Potential (S-VEP) is suggested to be the most feasible electrophysiologic technique to measure visual acuity. In Veterinary Medicine, researches regarding S-VEP standadization and VA values according to age are still scarce. The anatomical peculiarities of each breed directly influence in visual acuity. Thus, the aim of this study was to determine standard values of visual acuity in Cavalier King Charles Spaniel (CKCS) dogs in different ages and to define the moment of visual maturation in this breed. 50 CKCS dogs were selected and divides into five groups by age criteria: G1 (20 days of age), G2 (30 days), G3 (45 days), G4 (90 days), G5 (1 to 2 years old). The S-VEP was performed by Roland RETIport system electrodiagnostic device and the VA values were obtained in cicles per degree (cpd), Snellen Equivalent, decimal and LogMAR. Statstical analysis was based on Kruskal-Wallis test, followed by Dunn test, whenever it was required, using the statistical software Prism 5 for Windows (GraphPad Software). The median of the groups (from G1 to G5) were respectly 1,250; 1,750; 3,775; 4,000 e 4,135cpg. A statistical difference was observed between G1 x G3, and G2 x G3, unlike G3 x G4 x G5, that didn´t show differences between these three older groups, suggesting a plateau of VA values. Based on the results, the visual maturity of the subjects studied was achieved by 30 and 45 days of life.

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Potencial visual evocado por padrão reverso com tabuleiro de xadrez em gatos domésticos adultos

Cited by 2 publications

References 16 publications

Grating Visual Acuity in phakic, aphakic, and pseudophakic Poodles

Grating Visual Acuity in phakic, aphakic, and pseudophakic Poodles

>b<Mensuração da acuidade visual de cães da raça Cavalier King Charles Spaniel pelo potencial visual evocado de varredura (PVEV)>/b<

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