Comparison of single‑ and triple‑injection methods for ultrasound‑guided interscalene brachial plexus blockade

Wang,Cun‑Jin; Ge,Ya‑Li; Gao,Ju; Long,Feng‑Yun; Mi,Zhi‑Hua; Huang,Tian‑Feng; Fang,Xiang‑Zhi; Chen,Xiao‑Ping; Hua,Yu‑Si; Zhang,Yang

doi:10.3892/etm.2018.5771

Comparison of single‑ and triple‑injection methods for ultrasound‑guided interscalene brachial plexus blockade

Authors:
- Cun‑Jin Wang
- Ya‑Li Ge
- Ju Gao
- Feng‑Yun Long
- Zhi‑Hua Mi
- Tian‑Feng Huang
- Xiang‑Zhi Fang
- Xiao‑Ping Chen
- Yu‑Si Hua
- Yang Zhang
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Affiliations: Department of Anesthesiology, Clinical Medical College of Yangzhou University, Subei People's Hospital of Jiangsu, Yangzhou, Jiangsu 225001, P.R. China
Published online on: January 19, 2018 https://doi.org/10.3892/etm.2018.5771
Pages: 3006-3011

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Abstract

Ultrasound-guided interscalene brachial plexus blockade (IBPB) has a relatively high success rate in shoulder surgery; however, whether multiple injections are superior to a single injection (SI) is currently unknown. In the present study, ultrasound‑guided SI and triple‑injection (TI) IBPBs were compared in a prospective randomized trial. A total of 111 patients undergoing arthroscopic shoulder surgery and presenting with an American Society of Anesthesiologists physical status grading of I‑II were randomly allocated to receive IBPB with 15 ml of 1% ropivacaine as a SI or TI. Performance time, procedure‑related pain scores, success rate and prevalence of complications were recorded. The distribution of sensory and motor block onset in the radial, median, ulnar and axillary nerves were assessed every 5 min until 30 min post‑local anesthetic injection. The duration of sensory and motor blocks were also assessed. A significantly longer performance time was recorded in the TI group (P<0.001). No significant difference was observed in success rate (91% in TI vs. 88% in SI) 30 min post‑injection, and the prevalence of complications and procedure‑related pain were similar between the two groups. Sensory and motor blocks of the ulnar nerve in the TI group were significantly faster and more successful compared with the SI group at all time points (P<0.041). It was also observed that sensory and motor blocks in the TI group were prolonged compared with the SI group (P<0.041). In conclusion, the TI method exhibited a faster time of onset and resulted in a more successful blockade of the ulnar nerve. TI method may be a more effective approach for IBPB in a clinical setting.

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