Ultrasound-Guided Coracobrachialis Plane Musculocutaneous Nerve Block for Perioperative Analgesia in Pediatric Gartland Type III Supracondylar Humerus Fracture: a Prospective Pilot Study Gao et al. SHF Coracobrachialis plane musculocutaneous nerve block

Tianyi Gao¹Zhuorun Song²Shunyi Lu²Nan Song²Wentao Yu¹Huilin Yang²Jun Zou²Qian Wang¹Jun Ge^2*

• ¹Children's Hospital of Soochow University, Suzhou, Jiangsu Province, China
• ²The First Affiliated Hospital of Soochow University, Suzhou, China

Purpose: Perioperative pain management in children with Gartland Type III supracondylar humerus fractures (SHF) is crucial but often inadequately addressed, leading to significant pain experiences. This study aimed to evaluate the efficacy and safety of coracobrachialis plane musculocutaneous nerve block (Cora-MNB) compared to supraclavicular brachial plexus block (SC-BPB) for analgesia in pediatric Gartland Type III SHF patients.: A prospective pilot study enrolled 105 pediatric patients with Gartland Type III SHF was performed. Primary outcome was the postoperative FLACC scale measured at 12 hours postoperatively. Secondary outcomes included FLACC scale measured at 1 hour, 6 hours and 24 hours postoperatively. They also included postoperative thumb and shoulder strength, opioid use, NSAIDs use, length of hospital stays, patient satisfaction, surgeon satisfaction, operation time and puncture channels.One hundred and five patients were randomized allocated between groups.Results: Patients receiving Cora-MNB showed superior analgesia, with median postoperative FLACC pain scores at 12 h reduced by 40% (Cora-MNB: 3.00(2.00) vs SC-BPB: 5.00(2.00), p<0.001***). Thumb extensor weakness incidence decreased significantly (Cora-MNB: 13.5% vs SC-BPB: 84.9%, p<0.001***).Shoulder mobility preservation was achieved in 98.08% of Cora-MNB cases versus 94.34% with SC-BPB (p<0.001***). While opioid consumption showed no intergroup difference, Cora-MNB reduced NSAID rescue times (Cora-MNB: 0.00(1.00) vs SC-BPB: 1.00(1.00), p=0.0014**). Procedure duration favored Cora-MNB (4.54±1.21(min) vs 9.02±1.94(min), T=14.32, 95%CI: 3.88 -5.12, p<0.001***), with higher surgical and parental satisfaction scores. Hospital stays remained comparable (1.60±0.66(days) vs 1.56±0.67(days), p=0.98).Cora-MNB proves to be a safe and effective approach for anesthesia in pediatric SHF cases, offering superior analgesic outcomes, reduced NSAIDs usage, improved shoulder functionality, and high satisfaction levels without extending the hospital stay. This study supports the implementation of Cora-MNB as a valuable technique in perioperative pain management for pediatric SHF patients.