Normal values of b-wave responses of full-field electroretinogram in Lhasa Apso dogs with cataracts according to age

Pesquisa Veterinária Brasileira

Ana C.a. Góes¹  Tatiane Villar¹  Denise A. Otsuki¹  Ricardo Lisak¹  Ricardo A. Pecora¹  Angélica M.v. Safatle¹ 

关键词: Electroretinogram;    cataract;    dogs;    Lhasa Apso.;    Eletrorretinograma;    catarata;    caninos;    LhasaApso.;   

DOI  :  10.1590/S0100-736X2015000300011

来源: SciELO

【 摘 要 】

Lhasa Apso dogs with immature, mature or hypermature cataracts were divided into four groups according to their age (G1: 1 to 3 years old, G2: 4 to 7 years old, G3: 8 to 11 years old, G4: more than 12 years old). All animals were evaluated under the same sedation protocol to allow the performance of the electroretinogram (ERG) exam to determine normal value of b-wave response of the full-field ERG according to age. Three ERG responses were recorded: rod, maximal and cone responses. The amplitude values and b-wave implicit time of the responses of all groups were compared and analyzed by Kruskal-Wallis test (variance analysis for non-repeated measures), followed by the Dunn post-test (when p<0,05). A significant decrease was observed in maximal responses' amplitude, when comparing the G4 group with G1 and G2. No statistically relevant differences were observed in the b-wave implicit time values between groups. The ERG values are directly influenced by the animal's age. Older patients presented a decrease in the amplitude of the maximal response. The study determined the normal parameters of ERG b-waves for Lhasa Apso dogs with cataract according to their age group.

【 授权许可】

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