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We investigated patients with acute urinary tract obstruction in a DGH to ascertain which factors predispose to CKD and mortality. Method Over five months there were 37 nephrostomy/stent cases, 18 female, 3 mortalities. Median age was 55.5 (18-93). Retrospective data was used in a multiple regression analysis. Input variables included the intervention indication, admission Creatinine, Charlson Co-morbidity Index, and intervention delay. Output variables were length of hospital stay, renal function and 90-day mortality. Results Positive urine cultures (p = 0.035) and co-morbidity (p = 0.018) were associated with CKD. Nephrostomy patients (p = 0.031) were associated with AKI post-procedure. Delay in disobstruction (p &amp;lt; 0.01) and delay-length (p = 0.026) were significantly associated with longer hospital stays. AKI severity on admission (p = 0.047) and intervention delay (p = 0.045) increased risk of 90-day mortality, with positive blood cultures (p = 0.071) trending towards significance. Malignant obstruction neared a significant association with CKD (p = 0.08) and 90-day mortality (p = 0.075). Conclusions The severity of presentation and delay in intervention all contribute to poorer outcomes and a longer admission. Co-morbid patients with malignant obstruction had a higher risk of 90-day mortality. Therefore, in those with poor baseline, are we intervening inappropriately?

297 Risks of Delaying De-Obstruction of an Acutely Infected Obstructed Urinary Tract