Final answer:
The nurse would first check the blood pressure for hypotension in a client with an abdominal aortic aneurysm who suddenly becomes pale, light-headed, and experiences abdominal pain.
Step-by-step explanation:
The first action the nurse would take in a client with an abdominal aortic aneurysm who is suddenly pale, light-headed, and experiencing abdominal pain would be to check the blood pressure for hypotension. A sudden drop in blood pressure can indicate a ruptured aneurysm and immediate medical intervention is necessary. Assessing the respiratory rate for hyperventilation would be important, but checking the blood pressure takes precedence to determine the severity of the situation and the need for immediate treatment.
Learn more about Treatment of abdominal aortic aneurysm