Radiocontrast media (RCM) are concentrated solutions of tri-iodinated benzene derivatives for enhancement of radiographic contrast. Adverse reactions associated with RCM administration can either be hypersensitivity reactions, toxic reactions (e.g. generalized pruritus, heat sensation, flushing, nausea), or events unrelated to RCM exposure (e.g. spontaneous urticaria).1 Hypersensitivity reactions are classified into immediate reactions (IHR) occurring within 1 hour after RCM administration, or non-immediate reactions (NIHR) presenting > 1 hour after exposure.

中文翻译：

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造影剂超敏反应的诊断和治疗

Radiocontrast media (RCM) 是三碘苯衍生物的浓缩溶液，用于增强射线照相对比度。与 RCM 给药相关的不良反应可以是超敏反应、毒性反应（例如全身性瘙痒、热感、潮红、恶心）或与 RCM 暴露无关的事件（例如自发性荨麻疹）。 1 超敏反应分为速发型反应 (IHR) RCM 给药后 1 小时内发生，或暴露后 > 1 小时出现非即时反应 (NIHR)。