Objective To observe the effect of low permeability non-ionic contrast agent on renal function of patients with coronary intervention therapy,and to analyze the clinical risk factors of contrast-induced nephropathy(CIN).Methods 452 patients adopted coronary interventional diagnosis and treatment with low permeability non ionic contrast agent were chosen in this research.All the patients accepted the percutaneous coronary intervention(PCI) in Ningxia people's Hospital between Jan.2009 and Jan.2012.ASerum cre...