A nurse is assisting with the care of a toddler who has a septal defect and is scheduled for a cardiac catheterization. Which of the following actions should the nurse take?

Administer meperidine for pain immediately following the procedure.

Determine if the toddler has an allergy to iodine prior to the procedure.

Give the toddler clear liquids prior to the procedure.

Check the toddler's vital signs once each hour following the procedure.