A nurse is preparing a client to undergo a cardiac catheterization. Which of the following tasks should the nurse perform prior to the procedure?

A. Draw blood specimens for culture and sensitivity: Incorrect. Blood cultures are not routinely required for cardiac catheterization. B. Administer nitroglycerin 0.4 mg SL 30 min before the procedure: Incorrect. Nitroglycerin is not typically administered before a cardiac catheterization unless specifically ordered. C. Obtain a CBC with differential: A complete blood count (CBC) is necessary before a cardiac catheterization to assess for potential bleeding risks, infection, or anemia. D. Transport the client to radiology for a CT scan: Incorrect. Cardiac catheterization is performed in a specialized cardiac catheterization lab, not in radiology.