Percutaneous coronary intervention under the rigid restriction of contrast media dose in patients with chronic renal insufficiency.

Minimizing the dose of contrast media is considered to reduce the risk of contrast-induced nephropathy (CIN), which is a serious complication occurring in patients with chronic renal insufficiency (CRI) after percutaneous coronary intervention (PCI). We describe the drastic method of PCI, which successfully completes the procedure with minimal dose of contrast media in order to prevent CIN. In two cases complicated by CRI, PCI was safely carried out using less than 20 ml of contrast media in conjunction with various techniques or devices for minimizing the wasteful use of contrast media.