title: Iohexol vs. metrizamide: study of efficacy and morbidity in cervical myelography.
abstract: A double-blind study was conducted in 60 patients undergoing either cervical or more complete myelography via C1-C2 puncture. Patients received either iohexol or metrizamide at a 300 mg l/ml concentration. The contrast media were equally efficacious in the production of high-quality radiographs and CT scans. However, the incidence of adverse reactions differed markedly. Of patients receiving metrizamide, 68% had some type of adverse reaction, whereas only 26% receiving iohexol had symptoms. The incidence of headache (metrizamide, 34%; iohexol, 26%) was not statistically different, but the quality of the headache differed: half of the metrizamide headaches were moderate or severe, whereas all iohexol headaches were mild. Nausea (31%) and vomiting (28%) were common with metrizamide but unusual (3% nausea) with iohexol. Of the metrizamide patients, 21% had overt psychologic changes that did not occur in the iohexol group.
mesh_terms: D000328:Adult; D000368:Aged; D002574:Cervical Vertebrae; D002986:Clinical Trials as Topic; D003287:Contrast Media / Q000009:adverse effects; D005260:Female; D006261:Headache / Q000139:chemically induced; D006801:Humans; D007463:Iodobenzoates; D007472:Iohexol; D008297:Male; D008793:Metrizamide / Q000009:adverse effects; D008875:Middle Aged; D009192:Myelography / Q000379:methods*; D009325:Nausea / Q000139:chemically induced; D014283:Triiodobenzoic Acids / Q000009:adverse effects; D014839:Vomiting / Q000139:chemically induced
chemical_list: D003287:Contrast Media; D007463:Iodobenzoates; D014283:Triiodobenzoic Acids; D007472:Iohexol; D008793:Metrizamide