Balanced Salt Solution Versus 0.9% Saline Infusion for Prevention of Contrast-induced Acute Kidney Injury (BASIC Trial)

As iodinate contrast media (CM) has been widely used in current medical practice, contrast induced acute kidney injury (CI-AKI) has been an important issue. Previously, many guidelines suggested prophylaxis protocol using 0.9% saline when CM is administrated to high risk patients. However, recent studies showed that 0.9% saline might induce metabolic acidosis due to its supra-physiologic chloride component, and therefore renal vasoconstriction. In spite of protective effect by volume expansion with saline infusion, this renal vasoconstriction might have conflicting effect on renal function, as hypoxic injury is suspected to be the main cause of CI-AKI. In contrast to 0.9% saline, balanced salt solution has physiologic level of chloride and neutral pH. Also, recent studies proved preventive effect of balanced salt solution for AKI in several clinical settings. Hence, the investigators planned a prospective randomized controlled trial comparing 0.9% saline and balanced salt solution to prevent CI-AKI.