Clinical Research Directory

Inclusion Criteria: * Female patients * Age ranging from 18 to 65 years * American Society of Anesthesiologists (ASA) no more than II * Had unilateral cancer breast * Scheduled to do unilateral modified radical mastectomy Exclusion Criteria: * Pregnant female * Existing Horner syndrome * Had any neuromuscular disease * Had allergy to local anesthetics * History of use of analgesics * Had any deformity or a previous surgery in the neck or ipsilateral arm or breast * Had any contraindication to the procedure (coagulation disorders, local infection, sepsis) * Had any contraindication to the sympathetic blockade (decompensate cardiopulmonary or hemodynamic disorders) * History of psychotic disorder including depression, bipolar disorder or personality disorder * Patient with Beck Depression Inventory (BDI) score more than 13