LAUSR

698Background: Increasing cardiovascular disease has led to increases in the patient population on anti-platelet therapy who require urologic surgery. We sought to study perioperative outcomes for those undergoing partial nephrectomy (PN) while taking or not taking perioperative aspirin (pASA). Methods: A retrospective review of those undergoing PN was performed on the Premier Hospital Database from 2003 to 2015, with survey projection weighting resulting in a cohort of 10,807 patients. Two groups were formed – those continued on pASA (group 1, n = 774) and those with no pASA (group 2, n = 10,033). In-hospital complication rates were studied: major bleeding, overall transfusion, day-of-surgery transfusion, prolonged ( > 4 days) length of stay (LOS), and prolonged ( > 285 minutes) operative time. We also assessed 90-day rates of: cardiovascular catastrophe, readmission, major complication, and DVT/PE. Unadjusted rates were calculated for all PN patients and further subdivided into open and minimally invasi...