Analysis of Pre-and Post-operative Neutrophil Lymphocyte Ratio and Platelet Lymphocyte Ratio in Acute Kidney Injury After Coronary Artery Bypass Grafting Surgery

Abstract

Acute Kidney Injury (AKI) remains a common complication of post-operative Coronary Artery Bypass Grafting (CABG)related to high morbidity and mortality. Systemic inflammation has been known as a part of the pathogenesis of acute kidneyinjury. This study aimed to analyze the Neutrophil Lymphocyte (N/L) ratio and Platelet Lymphocyte (P/L) ratio in post-operativeAKI. This research was a retrospective study involving 76 patients who underwent CABG surgery in Dr. Wahidin SudirohusodoCentral Hospital, Makassar, between January 2015 and May 2019. The diagnosis of AKI was based on Kidney Disease ImprovingGlobal Outcomes (KDIGO) 2012 criteria. The N/L ratio and P/L ratio were calculated respectively as a neutrophil count ratio tolymphocyte count and platelet count to lymphocyte count. Twenty-five (32.9%) patients developed AKI in the first 48 hours ofthe post-operative period. There was no difference in pre-operative N/L ratio and the P/L ratio between AKI and non-AKIgroups (p > 0.05). Both ratios increased after surgery and were significantly different between the two groups with higher meanratio in non-AKI (16.93±9.16 vs. 21.86±11.13, p=0.040 and 239,24±184,36 vs. 314,49±143,73, p=0.011). Both pre-operativeand post-operative N/L ratio and P/L ratio could not distinguish AKI after CABG.