Outcome of SUB placement for the treatment of benign ureteral obstruction in dogs: nine dogs and 12 renal units (2013 to 2017)
2020
Milligan, M. L. | Berent, A. C. | Weisse, C. W. | Lamb, K. | Toizer, E.
OBJECTIVES: To describe a group of dogs with benign ureteral obstruction(s) treated by subcutaneous ureteral bypass and report the intra‐operative, peri‐operative, short‐ and long‐term outcomes. MATERIALS AND METHODS: Review of medical records of dogs that underwent subcutaneous ureteral bypass. RESULTS: Nine dogs (12 renal units) were included. Causes of obstruction included: ureterolithiasis (n=9) extraluminal compression (n=2), and stricture (n=1). Eleven of 12 ureters had a previously placed stent and required subcutaneous ureteral bypass for: recurrent stricture (n=4), diffuse ureteritis (n=4) or stent migration (n=3). Placement was successful in all renal units and there were no peri‐operative or procedure‐related deaths. Median hospitalisation time was 3 days. The median creatinine values pre‐operatively and 3 month post‐operatively were 186 and 106 μmol/L, respectively. No dog had worsening azotaemia in the short‐term. The most common long‐term complication was mineralisation of six devices, of which four required exchange. All dogs that were infected post‐operatively (n=5) had a history of at least one urinary tract infection pre‐operatively. One of the nine dogs had a chronic post‐operative urinary tract infection and had been chronically infected before placing the bypass. The median survival time was >774 days, with five of nine dogs alive at the time of publication. CLINICAL SIGNIFICANCE: Placement of a subcutaneous ureteral bypass was an effective short‐term treatment option for benign ureteral obstructions in dogs but there was a high rate of device mineralisation.
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