Risk factor analysis of iodinated contrast medium-related hypersensitivity reactions.

Area of Science:

• Radiology and Imaging
• Allergy and Immunology
• Patient Safety

Background:

• Hypersensitivity reactions to iodinated contrast media (ICM) are unpredictable Type B adverse events.
• Published risk factors since the 1980s are numerous, leading to uncertainty as most patients possess at least one risk factor.
• Clinical experience indicates only a small percentage of patients develop ICM hypersensitivity reactions.

Purpose of the Study:

• To critically analyze existing risk factors for ICM hypersensitivity reactions.
• To identify and categorize relevant risks based on scientific literature and clinical experience.
• To propose a refined set of clinically significant risk factors for patient safety.

Main Methods:

• A comprehensive literature review of 126 publications was conducted.
• Identified risk factors were critically assessed and categorized into patient-related, contrast agent-related, and management-related groups.
• Analysis focused on the clinical relevance and predictability of identified risks.

Main Results:

• 43 risks were initially identified, but critical assessment narrowed the focus.
• Four key risks were identified: history of ICM hypersensitivity, acute allergic symptoms, the specific culprit ICM, and documentation errors.
• Identical risk situations were found to be described under different names, and some published risks lacked mitigation measures.

Conclusions:

• The current extensive list of risk factors for ICM hypersensitivity is not clinically useful.
• Future clinical practice should focus on a limited set of high-risk factors for improved patient safety.
• The most relevant risks are a history of ICM-hypersensitivity, acute allergic symptoms, and documentation errors.