Impact of prognostic scores on acute kidney injury assessment in the postoperative period of myocardial revascularization

Objective: to determine the impact of the Simplified Acute Physiology Score 3 and the Sequential Organ Failure Assessment in assessing the severity of acute kidney injury in patients after cardiopulmonary bypass. Method: a retrospective cohort study with a nonprobabilistic sample. Inferential analysis was performed using Pearson's chi-square, Fisher's exact and Mann-Whitney tests, with a significance level of 5%. Results: the prevalence of acute kidney injury was 31.4%. The Simplified Acute Physiology Score 3 and the Sequential Organ Failure Assessment showed higher scores in patients with kidney injury (58 (48-64) versus 48 (37-57), p = 0.02; 7 (6-9) versus 6 (5-7), p = 0.003), in addition to a longer stay in intensive care, 8 (6-16) versus 6 (5-8) (p = 0.02) days, respectively. Conclusion: patients with acute kidney injury remained in intensive care longer, and the Simplified Acute Physiology Score 3 and the Sequential Organ Failure Assessment showed good performance, evidencing greater severity among patients with acute kidney injury in the postoperative period of coronary artery bypass grafting.