Comparing Pain Relief and Breathing Effects of Three Shoulder Nerve Blocks After Arthroscopic Surgery

What this Trial Is About

Researchers are evaluating alternative regional anesthesia techniques for pain control after arthroscopic shoulder surgery. This study aims to compare the commonly used interscalene block, which can cause diaphragmatic dysfunction due to phrenic nerve blockade, with other methods like the anterior suprascapular block and the pericapsular nerve group PENG block. The goal is to find an optimal pain management approach that preserves respiratory function. The study involves three groups receiving different nerve block procedures guided by ultrasound before surgery while patients lie in the supine position. One group receives the interscalene block with 10 mL of 0.25% bupivacaine injected between C5 and C6 nerves. Another group receives the anterior suprascapular block with 10 mL of local anesthetic around the suprascapular nerve. The third group undergoes the PENG block with 20 mL of anesthetic injected near the shoulder joint capsule. Participants will be monitored for pain levels within the first hour and 24 hours after surgery using pain scores. Respiratory function will be assessed during the perioperative period by measuring forced vital capacity FVC, forced expiratory volume in 1 second FEV1, and the FEV1FVC ratio. This randomized, single-blind study will help determine which block provides effective pain relief with fewer respiratory side effects, with participation lasting through the surgery and immediate recovery.

Comparative Analgesia and Respiratory Effects of Shoulder Blocks