The nurse is assessing a client with a history of deep vein thrombosis (DVT) who is admitted for possible pulmonary embolism (PE). It is important to report which finding to the healthcare provider immediately?

A. Unilateral calf pain: This is a classic sign of DVT, indicating localized clot formation in the leg. While significant, it is not as immediately life-threatening as signs of pulmonary embolism and does not require urgent reporting if PE is already suspected. B. Intravenous site inflammation: IV site inflammation may suggest phlebitis or local irritation but is not related to the acute life-threatening nature of pulmonary embolism. It should be addressed but does not warrant immediate escalation over respiratory symptoms. C. Pedal edema: Pedal edema is a common finding in DVT or chronic venous insufficiency and may be present without acute complications. Although it supports the history of venous thromboembolism, it is not urgent unless associated with other signs of decompensation. D. Difficulty breathing: Sudden onset dyspnea is a hallmark symptom of pulmonary embolism and may signal impaired gas exchange or hemodynamic compromise. This finding must be reported immediately as it indicates potential life-threatening embolic obstruction in the pulmonary circulation.