5. Severe esophageal or gastric varices and ulcers which may affect operation;
6. The anatomical variation of the abdominal trunk abdominal aorta and could not be accurately located;
7. Alcohol allergy
8. Severe cardiopulmonary dysfunction and inability to tolerate the risk of intravenous anesthesia;
9. History of mental illness;
10. Patients with other chronic and acute diseases with unstable conditions that are expected to affect the efficacy evaluation and completion of the study.
