Ultrasound-guided Stellate Ganglion Block for Treatment of Chronic Migraine in Adult

Exclusion Criteria

• •1. BMI \<15 kg/m2 or \>35 kg/m2；
• •2. Previous SGB treatment；
• •3. History of other neurological disorders；
• •4. History of severe cardiopulmonary, hepatic or renal dysfunction；
• •5. History of allergies to any of the study drugs；
• •6. Patients with chronic use of opioids；
• •7. Preoperative coagulation abnormalities (activated partial thromboplastin time greater than 1.5 time normal value)；
• •8. Infection or mass near the puncture site；
• •9. Neck anatomic structural changes (caused by radiotherapy or surgery);
• •10. Pregnant or breast feeding;
• •11. Psychological disorders;
• •12. Refusal to sign informed consent.