Adding Magnesium Sulfate to Local Anesthetic in Combined Pectoral Nerve and Stellate Ganglion Block for Postoperative Pain Control After Modified Radical Mastectomy

Patients received the combined pectoralis nerve block II (PECS II) (20 mL) and stellate ganglion block (5 mL) using 0.5% bupivacaine (local anesthetic) without magnesium sulfate.

Patients received the combined (20 mL) pectoralis nerve block II (PECS II) and stellate ganglion block (5 mL) using 0.5% bupivacaine (local anesthetic) mixed with 2.5 mL magnesium sulfate (10%), i.e., 250 mg.