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Endoscopic airway, blood gas, electrolytes, and acid-base in equine submitted to three-barrel training


The aim of this study was to evaluate the airways by endoscopy, gas profile, electrolytes and acid-base balance of horses in the Quarter Horse (QM) race before and after training three drums. Sixteen horses divided into two groups of 8 animals, with regular training (RT - 5 times a week) and sporadic training (ET - 2 times a week) were used in the experiment. Endoscopy was performed before and 90 min after training. Two blood samples were taken by puncturing the transverse facial artery before heating (M0) and immediately after training (M1), and the readings were performed with the I-Stat(r). PCO2, PO2, SO2, pH, BE, HCO3 and TCO2, Na +, K +, iCa, Glucose, Hg, and Ht were determined. ANOVA was used with repeated measures over time for comparisons of groups and time (P<0.05). The HFL befell was mild (1-2), the animals from both groups with 8/8 (100%) in the TR and 5/8 (62.5%) for the TE. There was presence of serous trachea 4/8 (50%) for both groups. The EIPH befell was mild (1-2) in the animals from both groups with 4/8 (50%) in the RT group and 3/8 (37.5%) for the TE group. Animals with grade 2 EIPH had mild hypoxemia and hypercapnia after exercise. The SO2, PCO2, pH, HCO3, BE, K, and iCa did not differ P <0.05 between groups. QM race submitted to TT exercise have EIPH and metabolic acidosis.

equine; blood gas; pulmonary hemorrhage; exercise

Universidade Federal de Minas Gerais, Escola de Veterinária Caixa Postal 567, 30123-970 Belo Horizonte MG - Brazil, Tel.: (55 31) 3409-2041, Tel.: (55 31) 3409-2042 - Belo Horizonte - MG - Brazil