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https://observatorio.fm.usp.br/handle/OPI/11958
Title: | Normal values of b-wave responses of full-field electroretinogram in Lhasa Apso dogs with cataracts according to age |
Authors: | GOES, Ana C. A.; VILLAR, Tatiane; OTSUKI, Denise A.; LISAK, Ricardo; PECORA, Ricardo A.; SAFATLE, Angelica M. V. |
Citation: | PESQUISA VETERINARIA BRASILEIRA, v.35, n.3, p.274-280, 2015 |
Abstract: | 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. |
Appears in Collections: | Artigos e Materiais de Revistas Científicas - LIM/08 |
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File | Description | Size | Format | |
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art_GOES_Normal_values_of_bwave_responses_of_fullfield_electroretinogram_2015.PDF | publishedVersion (English) | 1.67 MB | Adobe PDF | View/Open |
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