Effects of Ultrasound-Guided Stellate Ganglion Block and Transcutaneous Auricular Vagus Nerve Stimulation on Sleep Quality After Radical Mastectomy for Breast Cancer

Inclusion Criteria: * aged 18-80 years who underwent radical surgery for breast cancer * ASA I-III Exclusion Criteria: * 1\. Patients with coagulation dysfunction; * Patients with suspected regional infection leading to severe nerve damage in the affected limb; * Patients with congenital heart disease, coronary artery disease, myocardial infarction, severe cardiac conduction block, or those with implanted cardiac pacemakers; * Patients with severe neurological disorders such as cerebral infarction, cerebral hemorrhage, or stroke; * Patients with pain, lesions, infections, or unresolved external ear trauma in the area near the external ear; * Patients with severe mental illness or a history of substance abuse related to analgesics or psychiatric medications; * Patients with allergies to local anesthetics such as lidocaine or ropivacaine, as well as to general anesthetics; * Patients and their families who refuse surgical anesthesia and those unable to complete the survey questionnaire.