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Iodixanol (Visipaque, Nycomed, Oslo, Norway) is an iodinated contrast medium in the form of a non-ionic dimer which is iso-osmolar with plasma at all iodine concentrations. There is little evidence regarding its renal tolerance in renal impairment. We therefore undertook a prospective randomized comparison of iodixanol and the non-ionic monomer iohexol (Omnipaque, Nycomed, Oslo, Norway). The serum creatinine was measured pre-and postangiography in a series of in-patients to establish whetherdoi:10.1259/bjr.72.859.10624328 pmid:10624328 fatcat:262j7xqwf5f65piz4yybweinii