1, the patient should lie on the left side of the examination table with both knees flexed to expose the buttocks; 2, the doctor will let the patient continue to breathe oxygen and monitor the patient’s vital signs, and then the anesthesiologist will give the patient an intravenous push of isoproterenol and other anesthetic drugs to make the patient quickly enter a light sleep; 3, after the examination, the patient is usually still in a drowsy state. When fully awake, they can leave the examination room accompanied by their families.