A client with a history of receiving peritoneal dialysis is brought to the emergency department. When assessing the client, which clinical finding would require immediate intervention by the nurse?

A. Rigid abdomen: A rigid abdomen in a client receiving peritoneal dialysis is a hallmark sign of peritonitis, a life-threatening infection of the peritoneal cavity. Immediate intervention is required to prevent sepsis, including notifying the healthcare provider, obtaining cultures, and initiating antibiotics as prescribed. B. Peripheral edema: Peripheral edema indicates fluid retention, which is a common complication in clients with kidney disease. While it requires monitoring and potential adjustment of dialysis, it is not immediately life-threatening compared with signs of peritonitis. C. Proteinuria: Protein in the urine may indicate ongoing kidney damage but does not require urgent intervention in the acute setting. It should be monitored as part of long-term management but is not an emergency. D. Anorexia: Anorexia is a nonspecific symptom that may reflect chronic illness, electrolyte imbalance, or uremia. While it warrants assessment and supportive care, it does not require immediate action in the same way that a rigid abdomen does.