NPPB and acute kidney injury: By analyzing thepatients’ preoperative laboratory parameters, we found that neutrophils, NLR,N-terminal natriuretic peptide precursor (NT-proBNP), creatine kinase isoenzyme(CK-MB), NHR, and fasting glucose were higher in the CI-AKI group than in thenon-CI-AKI group; whereas lymphocytes, triglycerides (TG) and HDL were lower, andthe differences were statistically significant (p < 0.05).