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Risk factors for acute kidney injury after unilateral radical nephrectomy and inferior vena cava thrombectomy under cardiopulmonary bypass: a retrospective study


 In patients with renal cell carcinoma (RCC) and cancer-related thrombosis in the inferior vena cava (IVC) or right atrium (AT), it is still unknown whether nephrectomy, anesthesia, and surgical trauma can cause postoperative acute kidney injury (AKI) and what are the risk factors for AKI. To examine the incidence and risk factors of postoperative AKI in patients who underwent unilateral radical nephrectomy and cardiopulmonary bypass (CPB)-assisted thrombectomy in the IVC and/or atrial AT due to RCC complicated with cancer-associated thrombosis. This retrospective study included patients who underwent unilateral radical nephrectomy and CPB-assisted thrombectomy in the inferior vena cava and/or atrial pulmonary artery due to RCC, under general anesthesia, from December 2011 to June 2015, at Peking University First Hospital. Among 31 patients, 15 (48.4%) had postoperative AKI. Compared with the non-AKI group (n = 16), patients in the AKI group (n = 15) were older (59.0 ± 8.7 vs. 48.5 ± 12.9 years, P = 0.012) had smaller intraoperative urine volume (1225 ± 639 vs. 1685 ± 597 mL, P = 0.048). There were no differences in preoperative creatinine clearance. Age (OR = 1.10, 95%CI: 1.02–1.20, P = 0.020) was independently associated with AKI occurrence. The patients undergoing unilateral radical nephrectomy and CPB-assisted IVC thrombectomy have a high rate of AKI. Older ones are at a higher risk of postoperative AKI.