A nurse is caring for a client who is receiving a continuous IV infusion. The notes that the skin around the catheter's insertion site is edematous and cool. Which of the following actions should the nurse take first?

A) "Document the infiltration.": While documenting the infiltration is important for medical records, it is not the most immediate action to take. The nurse’s first priority should be to stop the infusion to prevent further complications such as tissue damage or excessive fluid accumulation around the insertion site. B) "Elevate the arm.": Elevating the arm may help with swelling if the infiltration is mild, but it does not address the primary issue of preventing further fluid leakage. Stopping the infusion is the priority action to stop the infiltration from worsening. C) "Apply a warm compress.": A warm compress can help with the absorption of infiltrated fluid, but it should not be applied until the infusion is stopped. If the infusion continues while a compress is applied, it could lead to further tissue damage and more discomfort for the client. D) "Stop the infusion.": The first action should be to stop the IV infusion to prevent further infiltration. This stops the flow of fluid into the tissue, which is crucial in minimizing the risk of tissue damage and complications. After stopping the infusion, the nurse can assess the site, document the findings, and take additional actions, such as applying a warm compress or elevating the arm.