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Background Acute Kidney Injury(AKI) is a common and serious complication of cardiovascular surgery.There is a need to find biomarkers that are involved in the etiology of cardiac surgery-associated acute kidney injury(CSA-AKI) and have an earlier response to acute kidney injury. The association between urine neutrophil gelatinase-associated lipocalin(NGAL) concentrations and AKI progression is not well established. Methods The prospective-cohort study included 1631 consecutive adult patients undergoing cardiac surgery at Fuwai Hospital between September 2012 and November 2013. AKI defined by Acute Kidney Injury Network(AKIN) criteria with a postoperative increase in plasma creatinine ≥50% baseline or ≥0.3 mg/dL. Urine NGAL was measured using latex particle-enhanced turbidimetric immunoassay. Associations between Urine NGAL levels and AKI were determined by estimating areas under receiver operating characteristic curves(AUC). Results A total of 438(26.9%) patients developed CSA-AKI. And the patients were divided into four groups:1193 non-AKI patients,368(22.6%) patients with AKIN stage 1 AKI, 49(3.0%) with AKIN stage 2 AKI and 21(1.3%) with AKIN stage 3AKI. urine NGAL concentrations at surgical intensive care unit(SICU) admission were significantly related to AKI severity. The AUCs for urine NGAL were for AKIN stage 1(0.54±0.02), AKIN stage 2(0.67±0.04), and AKIN stage 3(0.76±0.06), respectively. Conclusions Urinary NGAL is associated with CSA-AKI and its progression, indicating their potential use as prognostic markers. Urine NGAL level measured at SICU admission predicts the development of severe AKI after cardiac surgery.
Background Acute Kidney Injury (AKI) is a common and serious complication of cardiovascular surgery. There is a need to find biomarkers that are involved in the etiology of cardiac surgery-associated acute kidney injury (CSA-AKI) and have an earlier response to acute The association between urine neutrophil gelatinase-associated lipocalin (NGAL) concentrations and AKI progression is not well established. Methods The prospective-cohort study included 1631 consecutive adult patients undergoing cardiac surgery at Fuwai Hospital between September 2012 and November 2013. AKI defined by Acute Kidney Injury Network (AKIN) criteria with a postoperative increase in plasma creatinine ≥50% baseline or ≥0.3 mg / dL. Associations between Urine NGAL levels and AKI were determined by estimating areas under receiver operating characteristic curves (AUC). Results A total of 438 (26.9%) patients developed CSA-AKI. Patients with AKIN stage 1 AKI, 49 (3.0%) with AKIN stage 2 AKI and 21 (1.3%) with AKIN stage 3 AKI urine NGAL The AUCs for urine NGAL were for AKIN stage 1 (0.54 ± 0.02), AKIN stage 2 (0.67 ± 0.04), and AKIN stage 3 (0.76 ± 0.06 ), respectively. Conclusions Urinary NGAL is associated with CSA-AKI and its progression, indicating their potential use as prognostic markers. Urine NGAL level measured at SICU admission predicts the development of severe AKI after cardiac surgery.