Iodixanol – Cardiology MCQ
Iodixanol is a —- radiocontrast:
a) Iso-osmolar
b) Low osmolar
c) High osmolar
d) None of the above
Correct answer: a) Iso-osmolar
The osmolality of iodixanol is about 290 milliOsmoles/Kg and it is a dimer. Low osmolar contrasts are non ionic monomers, with osmolality ranging from 700 – 850 mOsm/Kg e.g: Iohexol, Iopamidol. High-osmolar contrast agents with osmolality of 1200 mOsm/Kg or more are no longer used for cardiac catheterization. These were ionic contrasts of the yester years with a lot of associated problems.
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About The Author
Johnson Francis
Former Professor of Cardiology, Calicut Govt. Medical Kozhikode, Kerala, India. Editor-in-Chief, BMH Medical Journal