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ABSTRACT. Barboza S.R., dos Santos R.V., Alves A., Rassele A.C., Dessaune Filho N., Barbosa T.S., Hiura E. & Machado F.M. [Determination of urinary GGT and ultrasonography Doppler in renal evaluation of anemic dogs.] Determinação da GGT urinária e ultrassonografia Doppler na avaliação renal de cães anêmicos. Revista Brasileira de Medicina Veterinária, 38(2):137-142, 2016. Setor de Clínica Médica de Animais de Pequeno Porte, Universidade Vila Velha, Av. Comissário José Dantas de Melo, 21, Boa Vista, Vila Velha, ES 29102-920, Brasil. Email: firstname.lastname@example.org The anemia is the most common disorder in dogs erythrocytes, may cause acute renal failure, as the kidneys are very sensitive to ischemia, requiring extensive blood supply. Sonner the IRA induction phase is detected, the greater chance of success in the reversibility of the injury. The objective of this study was to analyze the behavior of GGT (gamma glutamyl transpeptidase) urinary and renal blood flow from the Doppler ultrasound in order to detect tissue hypoxia in 21 anemic dogs of 8 months to 14 years old, who were divided into two groups according to the degree of anemia: Group I with moderate to severe anemia; and group II with mild anemia. In this experiment the degree of anemia little interference elimination urinary GGT; It was verified that the resistivity index was greater in animals with lower hematocrit; and that the greater the increased urinary elimination of GGT was the resistivity index.