Final answer:
The nurse's priority when caring for a patient with a pulmonary embolism is administering oxygen therapy to ensure the patient receives enough oxygen, which is crucial given the potential for severe consequences such as lung damage or death.
Step-by-step explanation:
The priority intervention for a nurse caring for a client who has pulmonary embolism (PE) is administering oxygen therapy. A pulmonary embolism is a blockage in the pulmonary artery caused by a blood clot that travels from other parts of the body, such as the legs in deep vein thrombosis (DVT). As the pulmonary arteries carry deoxygenated blood to the lungs for oxygenation, a blockage can lead to severe consequences, including lung damage or death due to disrupted pulmonary circulation. Administration of oxygen therapy is vital because it helps to ensure the patient receives enough oxygen, which is crucial for survival and preventing further complications. Other interventions, such as initiating anticoagulant therapy, implementing DVT prophylaxis, and monitoring vital signs, are also important but follow after addressing the immediate need for adequate oxygenation.