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  • Title: Diagnosis of iodinated contrast media hypersensitivity: results of a 6-year period.
    Author: Kvedariene V, Martins P, Rouanet L, Demoly P.
    Journal: Clin Exp Allergy; 2006 Aug; 36(8):1072-7. PubMed ID: 16911363.
    Abstract:
    BACKGROUND: Iodinated contrast media (ICM) hypersensitivity reactions represent a serious problem. Very few clinical data concerning systematic skin testing to ICM are available. OBJECTIVE: To evaluate the utility of ICM skin testing in patients with ICM hypersensitivity. MATERIAL AND METHODS: All patients referred over a 6-year period for ICM hypersensitivity past reactions were skin tested for (a) the implicated ICM, or (b) a set of ICM if they were positive for the implicated ICM or if its name was unknown. RESULTS: Forty-four patients, with a median age of 56 years, were studied (15 males, 29 females). The ICM skin tests were positive in 10 patients (23%): one had a positive skin prick test, seven an immediate positive intradermal test (IDT) and two a delayed positive IDT. Skin tests were more often positive in patients with immediate (9/32) as compared with those with non-immediate reactions (1/11). The time interval between the reaction and skin testing was shorter for those patients with an immediate ICM reaction and a positive skin test result (3 months [2.5-174.0]) as compared with those with an immediate ICM reaction and a negative skin test (48 months [6.8-159.0]), (P<0.05). Respiratory allergy was more frequent in the positive group (6/10 vs. 7/34, P<0.05). CONCLUSIONS: Skin tests with ICM are positive in a subgroup of patients with ICM hypersensitivity and may play an important role in the diagnosis of ICM allergy.
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