A client is admitted with a pulmonary embolism (PE). The client is young, healthy, and active, and has no known risk factors for PE. What action by the nurse is most appropriate?
Correct Answer: C
Rationale: The correct answer is C because teaching the client about factor V Leiden testing is important in this scenario. Factor V Leiden is a genetic mutation that increases the risk of blood clot formation, including pulmonary embolism. Since the client has no known risk factors for PE, testing for this specific genetic mutation can help identify an underlying cause. Encouraging walking (choice A) is generally beneficial but may not address the root cause. Referring for smoking cessation (choice B) is not relevant in this case. Explaining that sometimes no cause is found (choice D) is not proactive and may lead to missed opportunities for prevention.