ArticleJournal of feline medicine and surgery2026
Evaluation of the incidence of haematuria following the placement of subcutaneous ureteral bypass devices in 18 cats (2016-2022).
Article in Journal of feline medicine and surgery, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
ObjectivesThe aim of the present study was to evaluate the incidence of postoperative haematuria in cats treated with a subcutaneous ureteral bypass (SUB) device for the management of benign ureteral obstruction.MethodsMedical records from a single referral institute were retrospectively searched for cats that underwent placement of a SUB device for the management of benign ureteral obstruction between June 2016 and June 2022. Signalment, history, diagnostic imaging findings, surgery duration, and pre- and postoperative clinicopathological data were recorded.ResultsIn total, 18 cats presented with placement of de novo SUB devices: 14 unilateral SUBs and four bilateral SUBs. All 18 (100%) cats developed microscopic haematuria postoperatively. Median time to detection of microscopic haematuria was 1 month (range 1-11), with 16/18 (89%) detected on the first postoperative urinalysis. In total, 14 (78%) cats had persistent microscopic haematuria, two (11%) had recurrent microscopic haematuria and a further two (11%) cats had recurrent persistent microscopic haematuria. Severe haematuria (⩾50 red blood cells per high-power field) was identified in 13 (72%) cats; however, gross haematuria as a clinical sign was infrequently reported (n = 2/18, 11%). The median time to first detection of severe haematuria was 1 month (range: 1-31 months). Persistent severe haematuria was documented in seven cats, with a median duration of persistence of 17 months (range 5-31). Haematuria without a positive urine culture at any time point was present in 11/18 (61%) cats.Conclusions and relevanceIn this study population, postoperative persistent microscopic haematuria was a frequent finding in cats after SUB device placement. Further studies are necessary to understand if microscopic haematuria is a clinically relevant finding, and to further understand the aetiology of haematuria in such patients.
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