European radiology
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Contrast-induced acute kidney injury (CI-AKI), previously known as contrast-induced nephropathy (CIN), is a syndrome in which an acute renal dysfunction is diagnosed after the intravascular injection of contrast media. AKI implies an injury or damage but not necessarily a reduction in overall renal filtration function. The renal damage becomes evident only when more than 50 % of the renal mass is compromised. ⋯ These new biomarkers provide additional value, not only because they facilitate earlier diagnosis but also because they can diagnose AKI even in the absence of a change in subsequent filtration function. Thus, in this situation, these new criteria can reveal subclinical AKI. A new domain of AKI diagnosis could then include functional and structural criteria as indicated by laboratory testing.