Informed Consent in Contrast-Enhanced CT: Understanding of Risks and Identification of Possible Prognostic Factors

Area of Science:

• Radiology and Medical Imaging
• Patient Safety
• Health Communication

Background:

• Understanding risks associated with contrast media in CT scans is vital for patient safety.
• Informed consent processes aim to ensure patients comprehend potential complications.
• Factors influencing patient understanding of these risks require further investigation.

Purpose of the Study:

• To assess patient understanding of risks from intravascular contrast media during CT examinations.
• To identify socio-economic and epidemiologic factors affecting risk comprehension.
• To evaluate the impact of outcome-oriented informed consent on patient understanding.

Main Methods:

• A prospective study involving 120 patients in two arms: physician aware (Arm II) and unaware (Arm I) of the study.
• Standardized interviews assessed patient understanding of three key risks: anaphylactoid reactions, nephropathy, and thyrotoxic crisis.
• Patient understanding was quantified using a 6-point scale.

Main Results:

• Patients in Arm II (physician aware) scored significantly higher (4.93) than in Arm I (3.73) (p < 0.001).
• Higher education level (p = 0.001) and physician awareness (Arm II participation, p = 0.001) were significantly correlated with better risk understanding.
• No other socio-economic or epidemiologic factors showed a significant association.

Conclusions:

• An outcome-oriented and individualized informed consent process benefits patient understanding of contrast media risks.
• Informed consent materials should be adapted to the patient's educational level, potentially using didactic aids.
• Improving informed consent tailored to educational status enhances patient safety in CT examinations.