Clinical findings:
Upon presentation at the clinéquine of the Vetagro Sup Lyon, the gelding was bright and alert, weighed 518 kg and his body condition score was estimated at 6/9. The mucous membranes were slightly icteric and the capillary refill time was slightly elevated at 3 seconds. The gastrointestinal borborygmi were decreased in the upper left part of the abdomen. His rectal temperature was within normal limits (37,3°C). His heart rate and respiratory rate were within normal limits (48 beats per minute and 20 breaths per minute) and auscultation was normal. He showed signs of dysuria and a urinary catheter was placed. A distal obstruction with sediment was present and urine was taken by catheterization for bacteriology and cytology. Urine cytology showed an increased white blood cell count (20-30 per chamber) and the presence of multiple bacteria and carbonates. Bacterial culture however remained sterile. On rectal palpation, a distended bladder was present that could be voided by manipulation. Abdominal ultrasound showed no abnormalities. A complete blood count revealed a mild neutrophilic leukocytosis (WBC: 12,83 x 10^9/L; neutrophiles: 9,39 x 10^9/L). Biochemistry revealed no abnormalities. The venous blood gas revealed a slight hypokalemia (2,7 mmol/L).