{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,13]],"date-time":"2026-03-13T17:16:12Z","timestamp":1773422172025,"version":"3.50.1"},"reference-count":82,"publisher":"American Veterinary Medical Association (AVMA)","issue":"4","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["javma"],"published-print":{"date-parts":[[2026,4,1]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:sec>\n                    <jats:title>Objective<\/jats:title>\n                    <jats:p>To investigate the link between preoperative anemia and perioperative complications in cats undergoing general anesthesia for subcutaneous ureteral bypass (SUB) and examine whether preoperative anemia is associated with poor outcome.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>This retrospective study used data records of cats presenting to the Queen Mother Hospital for Animals requiring SUB system implantation. Anemia was defined as a PCV &lt; 25%. Signalment, blood samples, perioperative data, and short-term outcomes were compared between anemic and nonanemic groups.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>196 cats were included; 28.6% (n = 56) presented anemic. Anemic patients were more likely to be hypotensive perioperatively compared with nonanemic patients. Nonanemic cases were significantly more likely to demonstrate a greater reduction in creatinine following SUB placement (median, 73.0% reduction vs anemic cases, 56.6%; OR, 0.4146; 95% CI, 0.1835% to 0.8929%). Patients presenting with anemia were significantly older than patients presenting without anemia (95% CI, \u20132.411% to \u20130.2965%). There was no significant difference in survival to discharge (OR, 0.7106; 95% CI, 0.2421% to 2.033%) or 30-day survival between anemic and nonanemic groups (OR, 0.5798; 95% CI, 0.2446% to 1.396%).<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions<\/jats:title>\n                    <jats:p>Anemic cats presenting with ureteric obstruction are at an increased risk of perioperative hypotension and less likely to have a reduction in creatinine at discharge. There was no difference in survival between groups.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Clinical Relevance<\/jats:title>\n                    <jats:p>Anemia occurs commonly in cats with ureteric obstructions and is a preoperative factor shown to require careful management during the peri- and postoperative periods, increasing complications and reducing the normalization of creatinine.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.2460\/javma.25.07.0498","type":"journal-article","created":{"date-parts":[[2025,12,24]],"date-time":"2025-12-24T15:50:01Z","timestamp":1766591401000},"page":"1-8","source":"Crossref","is-referenced-by-count":0,"title":["Association of preoperative anemia on perioperative complications and short-term outcomes in cats undergoing subcutaneous ureteral bypass"],"prefix":"10.2460","volume":"264","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-1191-8867","authenticated-orcid":true,"given":"Joe","family":"Simon","sequence":"first","affiliation":[{"name":"Department of Clinical Science and Services, Royal Veterinary College, University of London, London, UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Thomas","family":"Livingstone","sequence":"additional","affiliation":[{"name":"Department of Clinical Science and Services, Royal Veterinary College, University of London, London, UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jack","family":"Lawson","sequence":"additional","affiliation":[{"name":"Department of Clinical Science and Services, Royal Veterinary College, University of London, London, UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Thaleia-Rengina","family":"Stathopoulou","sequence":"additional","affiliation":[{"name":"Department of Clinical Science and Services, Royal Veterinary College, University of London, London, UK"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1272","reference":[{"issue":"3","key":"ref1","series-title":"J Vet Intern Med","first-page":"1047","article-title":"Benign ureteral obstruction in cats: outcome with medical management","volume":"37","author":"Merindol I","year":"2023","unstructured":"Merindol I, Vachon C, Juette T, Dunn M. 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J Vet Intern Med. 2023;37(3):1047-1058. doi:10.1111\/jvim.16709"},{"issue":"12","key":"ref2","series-title":"J Feline Med Surg","first-page":"1052","article-title":"Predictors of outcome for cats with ureteral obstructions after interventional management using ureteral stents or a subcutaneous ureteral bypass device","volume":"15","author":"Horowitz C","year":"2013","unstructured":"Horowitz C, Berent A, Weisse C, Langston C, Bagley D. Predictors of outcome for cats with ureteral obstructions after interventional management using ureteral stents or a subcutaneous ureteral bypass device. J Feline Med Surg. 2013;15(12):1052-1062. doi:10.1177\/1098612X13489055"},{"issue":"1","key":"ref3","series-title":"J Small Anim Pract","first-page":"4","article-title":"Survival and complications in cats treated with subcutaneous ureteral bypass","volume":"62","author":"Kulendra NJ","year":"2021","unstructured":"Kulendra NJ, Borgeat K, Syme H, Dirrig H, Halfacree Z. Survival and complications in cats treated with subcutaneous ureteral bypass. J Small Anim Pract. 2021;62(1):4-11. doi:10.1111\/jsap.13226"},{"issue":"8","key":"ref4","series-title":"J Feline Med Surg","first-page":"759","article-title":"Complications and survival after subcutaneous ureteral bypass device placement in 24 cats: a retrospective study (2016-2019)","volume":"23","author":"Vrijsen E","year":"2021","unstructured":"Vrijsen E, Devriendt N, Mortier F, Stock E, Van Goethem B, de Rooster H. Complications and survival after subcutaneous ureteral bypass device placement in 24 cats: a retrospective study (2016-2019). J Feline Med Surg. 2021;23(8):759-769. doi:10.1177\/1098612X20975374"},{"issue":"6","key":"ref5","series-title":"J Am Vet Med Assoc","first-page":"932","article-title":"Clinical, clinicopathologic, radiographic, and ultrasonographic abnormalities in cats with ureteral calculi: 163 cases (1984-2002)","volume":"226","author":"Kyles AE","year":"2005","unstructured":"Kyles AE, Hardie EM, Wooden BG,  Clinical, clinicopathologic, radiographic, and ultrasonographic abnormalities in cats with ureteral calculi: 163 cases (1984-2002). J Am Vet Med Assoc. 2005;226(6):932-936. doi:10.2460\/javma.2005.226.932"},{"issue":"5","key":"ref6","series-title":"J Am Vet Med Assoc","first-page":"518","article-title":"Outcomes of ureteral surgery and ureteral stenting in cats: 117 cases (2006-2014)","volume":"248","author":"Wormser C","year":"2016","unstructured":"Wormser C, Clarke DL, Aronson LR. Outcomes of ureteral surgery and ureteral stenting in cats: 117 cases (2006-2014). 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