Final answer:
The highest priority nursing intervention before an intravenous pyelogram is to ask the client about allergies to shellfish, due to the risk of allergic reaction to the iodine-based contrast material used in the test.
Step-by-step explanation:
Determining the Highest Priority Nursing Intervention for an IV Pyelogram:
The highest priority nursing intervention for a client scheduled for an intravenous pyelogram (IVP) is asking if the client has allergies to shellfish. An IVP involves the use of iodine-based contrast material, which can cause an allergic reaction in individuals who are sensitive to iodine or shellfish.
Ensuring patient safety by assessing for potential allergies is a critical step before administering contrast. While providing a favorite meal, encouraging fluids, and explaining the procedure are also important, they are of lower priority than identifying allergy risk.
The nurse must obtain a detailed allergy history from the client, as a reaction to the contrast dye can range from mild to severe. If an allergy is present, alternative diagnostic procedures or premedication prior to the IVP may be necessary.