A nurse in a hematology clinic is working with four clients who have polycythemia vera. Which client would the nurse assess first?

A. This may indicate gout, which is painful but not immediately life-threatening. While important to assess, it is not the highest priority in polycythemia vera. B. This indicates severe hypertension, which requires monitoring and intervention, but unless symptoms such as chest pain, neurologic changes, or shortness of breath are present, it is less immediately urgent than signs of a potential thrombotic event. C. This client may have a deep vein thrombosis (DVT), a serious complication of polycythemia vera due to increased blood viscosity and platelet aggregation. DVT carries a risk for pulmonary embolism, making this the highest priority for assessment and intervention. D. Shortness of breath is concerning and can indicate hypoxia or pulmonary complications, but in the context of polycythemia vera, a suspected DVT that could embolize is more urgent to assess first.