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Interscalene Versus Infraspinatus-Teres Minor Blocks for Arthroscopic Shoulder Surgery
Sponsor: Ataturk University
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).
Official title: Comparison of Interscalene and Infraspinatus-Teres Minor Blocks on Postoperative Opioid Consumption and Pain Scores in Patients Undergoing Arthroscopic Shoulder Surgery
Key Details
Gender
All
Age Range
18 Years - 65 Years
Study Type
INTERVENTIONAL
Enrollment
60
Start Date
2026-01-01
Completion Date
2026-05-02
Last Updated
2026-01-05
Healthy Volunteers
No
Conditions
Interventions
Interscalene Brachial Plexus Block (ISB)
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.
Infraspinatus-Teres Minor Block (ITM)
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.
Locations (1)
Ataturk University
Erzurum, Turkey (Türkiye)