Effectiveness of Field Block Compared With Interscalene Block in Shoulder Surgery

"For Shoulder Field Block intervention:~This intervention involves a regional anesthesia technique targeting the sensory nerves of the shoulder surgical field: the suprascapular, axillary, and lateral pectoral nerves. The block is performed intraoperatively by the orthopedic surgeon using anatomical landmarks after induction of general anesthesia. A mixture of lidocaine with epinephrine, bupivacaine, and saline is injected into the shoulder area to provide local anesthesia and prolonged postoperative analgesia. This technique aims to spare the phrenic nerve, potentially reducing respiratory complications associated with traditional blocks."

This intervention involves a standard interscalene brachial plexus block performed preoperatively by an anesthesiologist under ultrasound guidance. It anesthetizes the upper roots (C5-C7) of the brachial plexus to provide effective analgesia for shoulder surgery. While effective, it carries risks such as hemi-diaphragmatic paralysis, Horner's syndrome, and motor weakness of the ipsilateral arm due to spread to adjacent nerves.