Radiocontrast-induced nephropathy. Prevention is better than cure.

The principal predisposing factor in radiocontrast-induced nephropathy appears to be underlying renal insufficiency. Identifying patients at risk is of paramount importance when a diagnostic study is being chosen. Contrast-reliant studies should be avoided, if possible, in high-risk patients. If challenge with a contrast medium is essential, appropriate risk stratification and adequate patient preparation should be done beforehand. Ultimately, prevention is a better approach than cure.