Before an arteriogram using a radiopaque dye, what critical assessment must the nurse perform?

In the context of preparing a patient for an arteriogram that utilizes radiopaque dye, assessing for an allergy to iodine or shellfish is critical. This is due to the components found in many contrast agents, which often contain iodine. Patients with a known allergy to iodine can experience severe allergic reactions, including anaphylaxis, when exposed to iodinated contrast media. Therefore, it is essential for the nurse to establish any history of allergic reactions to iodine or shellfish before the procedure to ensure patient safety and to take necessary precautions, such as premedication or choosing an alternative imaging modality if needed.

While vital signs, intake and output, and height and weight are important assessments in various contexts, they do not directly pertain to the immediate risk factors associated with the use of radiopaque dye in this particular procedure. Knowing the patient's allergy status is crucial for preventing potential complications during the arteriogram.