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- W2138574852 abstract "Abstract Allergy‐like reactions may occur following administration of iodinated contrast media (CM), mostly in at‐risk patients (patients with history of previous reaction, history of allergy, co‐treated with interleukin‐2 or beta‐blockers, etc.) but remain generally unpredictable. Severe and fatal reactions are very rare events. All categories of CM may induce such reactions, although first generation (high osmolar CM) have been found to induce a higher rate of adverse events than low osmolar CM. However, no differences were found between the two categories of CM with respect to mortality. Delayed reactions can also occur. There are no differences between the various categories of CM except for non‐ionic dimers, which are more likely to induce such effect. Numerous clinical studies have evaluated the prophylactic value of drugs (mostly antihistamines and corticosteroids). Results are unclear and highly variable. Any prevention depends upon the mechanism involved. However, the mechanism of CM‐induced allergy‐like reaction remains disputed. Relatively recent data revived the hypothesis of a type‐I hypersensitivity mechanism. Positive skin tests to CM have been reported. However, the affinity of IgE towards CM has been found to be very low in the only study which actually evaluated it. Other pathophysiological mechanisms (involving direct secretory effects on mast cells or basophils, or activation of the complement system associated or not with the plasma contact system) are also much debated. Anaphylaxis and anaphylactoid reactions are, in the end, clinically undistinguishable." @default.
- W2138574852 created "2016-06-24" @default.
- W2138574852 creator A5016040044 @default.
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- W2138574852 date "2005-05-17" @default.
- W2138574852 modified "2023-10-16" @default.
- W2138574852 title "Allergy-like reactions to iodinated contrast agents. A critical analysis" @default.
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