Total Spinal Anesthesia Following an Interscalene Block Treated with Intravenous Lipid Emulsion.

Total spinal anesthesia following interscalene block is a rare and life-threatening complication of regional anesthesia. A 56-year-old woman underwent an uncomplicated left shoulder bone spur removal under general anesthesia with an interscalene nerve block at an outpatient surgical center. Subsequently, she developed bilateral mydriasis, paralysis of all extremities, and respiratory arrest.