title: Transfemoral digital subtraction aortography. Are diluted high osmolar contrast media acceptable?
abstract: The ionic monomer, sodium diatrizoate at 150 mg I/ml (726 mosmol/kg) and the non-ionic monomer, iopamidol, diluted to the same iodine concentration but at 324.3 mosmol/kg, were randomly allocated to patients undergoing transfemoral intra-arterial digital subtraction angiography for lower limb peripheral vascular disease. The agents produced images of comparable quality and diagnostic efficacy. There were no significant differences between the media regarding sensations of pain and warmth. Minor neurological symptoms (headache and dizziness) occurred 7 times more frequently with the ionic monomer. There was a slight but temporary rise in plasma potassium one hour after injection of the ionic monomer but no evidence of appreciable intravascular haemolysis. The non-ionic monomer caused a slight fall in haemoglobin and haematocrit one hour after injection which is attributed to osmotic haemodilution. It is concluded that a diluted high osmolar contrast agent is an acceptable alternative to a low osmolar agent in transfemoral digital subtraction lower limb aortography.
authors.affiliation: Department of Radiology, Royal Victoria Infirmary, Newcastle upon Tyne, Great Britain.
authors.forename: G P
authors.initials: GP
authors.lastname: Naisby
authors.forename: J P
authors.initials: JP
authors.lastname: Owen
authors.forename: T W
authors.initials: TW
authors.lastname: Alexander
authors.forename: L
authors.initials: L
authors.lastname: Cope
authors.forename: M F
authors.initials: MF
authors.lastname: Laker
authors.forename: P J
authors.initials: PJ
authors.lastname: Hamilton
mesh_terms: D000328:Adult; D000368:Aged; D015901:Angiography, Digital Subtraction; D001027:Aortography; D003287:Contrast Media; D003973:Diatrizoate / Q000009:adverse effects; D005260:Female; D006801:Humans; D007479:Iopamidol / Q000009:adverse effects; D008297:Male; D008875:Middle Aged; D009994:Osmolar Concentration
chemical_list: D003287:Contrast Media; D003973:Diatrizoate; D007479:Iopamidol