Final answer:
The nurse should prioritize educating the client about the use of heparin during the right leg atherectomy procedure.
Step-by-step explanation:
The priority education that the nurse should provide before a right leg atherectomy is option d: "You may be on heparin during the procedure." Heparin is commonly used during atherectomy procedures to prevent blood clotting. It is typically administered intravenously before and during the procedure, and the nurse should educate the client about its purpose and potential side effects. The other options, such as using the bathroom after the procedure, being sedated for 6 hours, and stopping daily aspirin, are not the priority education in this context.