What symptom should the nurse monitor to assess for an allergic reaction after a pulmonary angiography?

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Monitoring for respiratory distress after a pulmonary angiography is crucial because allergic reactions can significantly impact the respiratory system. When a patient is exposed to contrast agents during this procedure, there is a risk of hypersensitivity. Allergic reactions may trigger bronchospasm, leading to difficulty in breathing, wheezing, or even anaphylaxis in severe cases.

While skin rash, fever, and nausea may also occur in some allergic responses or adverse reactions, respiratory distress is particularly concerning because it can quickly become life-threatening. Immediate recognition and intervention are necessary to ensure the patient's safety and manage any complications that arise from the allergic reaction. Therefore, respiratory distress is the most critical symptom to monitor in this context.