At a glance
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Comparison of Interscalene and Infraspinatus-Teres Minor Blocks on Postoperative Opioid Consumption and Pain Scores in Patients Undergoing Arthroscopic Shoulder Surgery
In Brief
A clinical study evaluating Interscalene Brachial Plexus Block (ISB) and Infraspinatus-Teres Minor Block (ITM) for Arthroscopic Shoulder Surgery. Completed, enrolled 60 participants across 1 site.
Detailed Summary
This randomized controlled trial aims to compare the effectiveness of interscalene (ISB) and infraspinatus-teres minor (ITM) blocks for postoperative analgesia in patients undergoing elective arthroscopic shoulder surgery. The primary outcome is total 24-hour opioid consumption. Secondary outcomes include pain scores, hemidiaphragmatic paresis incidence and severity, duration of analgesia, and changes in lung function. Participants are randomized into ISB or ITM groups; blocks are performed under ultrasound guidance. Postoperative pain is managed with patient controlled analgesia(PCA).
Study Details
Timeline
Interventions
Patients receive ultrasound-guided ISB before arthroscopic shoulder surgery. After sedation with IV midazolam, 15 ml of 0.25% bupivacaine is injected using a 22 Gauge 50 mm needle with posterior in-plane approach, targeting C5-C6 roots.
Patients receive ultrasound-guided ITM interfascial block in sitting position before surgery. Using a 22 Gauge 10 mm needle, 25 ml of 0.25% bupivacaine is injected between infraspinatus and teres minor muscles via out-of-plane or in-plane hydrodissection.