Take a shower the night before treatment to keep the skin of the neck clean; On the day of treatment 1. At least 1 person should come with you; 2. Instructions on diet before treatment a) Patients who have ablation on Monday morning can have breakfast and come to the hospital at 8:30; b) Patients who have treatment on Thursday morning do not have breakfast and come to the hospital at 7:30. 3. Please do not stop using antihypertensive drugs and hypoglycemic drugs; 4. After arriving at the hospital on the morning of treatment, please go to the ultrasound room on the 2nd floor; a) change into a patient’s gown (shirt) b) get a lingering injection in the left hand; 5. After making the above preparations, please go to the lobby on the 2nd floor and wait for the notice; 6. empty urine and stool before treatment; 7. remove glasses, dentures, jewelry, etc. and take care of them; 8. contact Dr. Fan if you have any questions.