What should the nurse do first for a client with deep vein thrombosis who suddenly develops dyspnea?

In a situation where a client with deep vein thrombosis (DVT) suddenly develops dyspnea, the most immediate action is to elevate the head of the bed. This position can help improve the client's breathing by facilitating better airflow and reducing any potential respiratory distress. Elevating the head of the bed also assists in the redistribution of blood flow, which can be crucial since DVT is associated with the risk of pulmonary embolism (PE), a serious condition where a clot travels to the lungs and obstructs blood flow.

In the context of a potential pulmonary embolism, the priority is to ensure the client is as comfortable as possible while preparing for further assessment and intervention. Elevating the head of the bed can alleviate symptoms of dyspnea, allowing the nurse to perform other necessary evaluations and interventions effectively.

Other actions, such as auscultating lung sounds or encouraging coughing and deep breathing, are important but can follow after the client is positioned appropriately. Contacting the physician is also an essential action but ensuring the client's immediate comfort and accessibility to breathing is paramount.