A nurse is working with several clients on an acute care pediatric unit. Which of the following clients requires the nurse's immediate attention?

A. A 12-year-old client who had an appendectomy and refuses to ambulate: Refusal to ambulate post-appendectomy may be concerning for complications like constipation or post-operative discomfort, but it is not an immediate emergency unless accompanied by other signs of complications like infection or bleeding. B. An 18-month-old client who had a cleft palate repair and is crying in pain: Pain is expected following surgery, and while it should be addressed promptly, it does not constitute an immediate emergency unless there are signs of distress or complications. C. An 8-year-old client who had a tonsillectomy and is swallowing frequently: Frequent swallowing after a tonsillectomy can indicate bleeding, which is a potential complication requiring immediate attention. It is important to assess for signs of bleeding, such as increased swallowing or a change in respiratory status. D. A 15-year-old client who has an IV infusion and reports pain at the insertion site: Pain at the IV insertion site could indicate a complication like infiltration or phlebitis, but it is not an immediate emergency unless associated with other severe symptoms (e.g., swelling or systemic infection).