The doctor introduces the advantages and disadvantages of interventional treatment to the patient and family, and explains the procedure in graphic form. He or she gives a clear explanation to the patient, the leader of the patient’s unit, and the family about possible intraoperative accidents and postoperative complications and signs a surgical protocol. Please inform the doctor of any medications you are taking, including herbal and health medications, and report any allergies to iodine, any medications, food, pollen, and seafood. Before surgery, your doctor will have you take the oral antiplatelet medications aspirin and clopidogrel (Bolivar), which have a synergistic antiplatelet effect when combined together. This is because antiplatelet therapy is an important adjunctive treatment to reduce postoperative ischemic complications in patients undergoing percutaneous coronary intervention. The day before the procedure, the physician or nurse routinely prepares the skin sheet according to the site of the procedure; for transradial interventions, the skin preparation area is: the right forearm is shaved with body hair from the wrist; for transfemoral interventions, the skin preparation area is: the bilateral groin and perineum. Fasting from food and water is required several hours prior to the procedure, and for patients undergoing emergency interventions, the duration of fasting is at the discretion of the physician. The nurse will instruct and train the patient to urinate in bed; and advise that getting enough sleep before surgery is one of the most important factors for a successful procedure, if necessary taking oral sleeping pills the night before surgery. The nurse performs an indwelling needle puncture in your left forearm prior to surgery. Before entering the catheterization room, the patient is instructed to empty the bladder and remove valuables such as watches, bracelets, glasses, dentures, and jewelry.