A nurse is assisting with the care of a client following a cerebral angiography. Which of the following actions should the nurse take?

A. Apply a warm pack to the client's puncture site. Applying a warm pack to the puncture site is not appropriate immediately following cerebral angiography. Cold compresses are generally recommended initially to reduce swelling and discomfort, while warmth may be used later as advised by the healthcare provider. B. Monitor for bleeding at the catheter site. Monitoring for bleeding at the catheter site is a critical action after cerebral angiography. The nurse should assess the site frequently for signs of hematoma or excessive bleeding, which can indicate complications from the procedure. C. Replace the client's pressure dressing in 2 hr. The pressure dressing should not be replaced without specific orders from the healthcare provider. The nurse should assess the dressing for any signs of bleeding or drainage and follow the protocol for dressing changes as indicated. D. Encourage the client to ambulate in 1 hr. Early ambulation may not be safe immediately after cerebral angiography, especially if the client has undergone a procedure involving sedation or if there is a risk of complications. The nurse should follow the provider's orders regarding activity restrictions and assess the client's readiness for ambulation based on their condition and vital signs.