Contrast-associated acute kidney injury (AKI) is defined as a decrease in renal function occurring after intravascular administration of iodinated contrast. The Kidney Disease Improving Global Outcomes (KDIGO) working group proposed the term “contrast induced acute kidney injury”; they suggested a definition based on a plasma creatinine level that increases by 50 % or more compared to the baseline value in the 7 days after contrast exposure, a plasma creatinine level that increases by at least 0.3 mg per decilitre (26.5 μmol per liter) compared to baseline <48 h after contrast exposure, or a urinary volume < 0.5 ml per kilogram body weight per hour that persists for at least 6 h after contrast exposure .