Comparison of Ultrasound Guided Interscalene and Supraclavicular Brachial Plexus Block for Clavicle Fracture Surgery

Abstract

Introduction:The clavicle has dual nerve supply from the brachial plexus and cervical plexus. The interscalene brachial plexus block combined with superior cervical plexus block is frequently used for the clavicle surgery. This study was conducted to compare ineterscalene approach with the supraclavicular approach for brachial plexus block used for clavicle surgery Methodology:This was prospective comparative study conducted for two years in tertiary care hospital. Sixty patients with clavicle fracture with ASA I and II were randomly divided into two equal groups; ISBPB (interscalene approach) and SCBPB (supraclavicular approach). Both of these blocks were combined with superior cervical plexus block. Ultrasound was used to perform all the blocks. Primary outcome for the comparison was block characteristics, which included sensory and motor block onset, duration, and block satisfaction. The secondary variables used for comparison were analgesic properties and complications. Results: Supraclavicular brachial plexus had rapid onset of sensory and motor block and was statistically significant (P<0.05) as compared to interscalene approach. Similarly, SCBPB had significantly longer duration of sensory block (P=0.003). The duration of motor block was comparable between the blocks. The intraoperative pain score (VAS), requirement of rescue analgesia with in 24 hours of surgery and complications related with the procedures were comparable between the two groups. Majority of the patients were satisfied with either of the approach for brachial plexus block. Conclusion: Supraclavicular brachial plexus block combined with superior cervical plexus block provided equally effective and adequate anesthesia and analgesia for clavicle surgery with comparable complications as compared to interscalene approach.