Protocol: Comparative efficacy of 2 mL vs. 5 mL 0.375% ropivacaine in subparaneural upper trunk brachial plexus block for postoperative analgesia after arthroscopic shoulder surgery-a randomized noninferiority trial.

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Title: Protocol: Comparative efficacy of 2 mL vs. 5 mL 0.375% ropivacaine in subparaneural upper trunk brachial plexus block for postoperative analgesia after arthroscopic shoulder surgery-a randomized noninferiority trial.
Authors: Lou J; Department of Anesthesiology, Ningbo Yinzhou No.3 Hospital, Ningbo, Zhejiang, China., Zhang Y; Department of Anesthesiology, Ningbo No.6 Hospital, Ningbo, Zhejiang, China.; Ningbo Clinical Research Center for Orthopedics, Sports Medicine & Rehabilitation, Ningbo, Zhejiang, China., Chen J; Department of Anesthesiology, Ningbo No.6 Hospital, Ningbo, Zhejiang, China.; Ningbo Clinical Research Center for Orthopedics, Sports Medicine & Rehabilitation, Ningbo, Zhejiang, China., Diao S; Department of Anesthesiology, Ningbo No.6 Hospital, Ningbo, Zhejiang, China.; Ningbo Clinical Research Center for Orthopedics, Sports Medicine & Rehabilitation, Ningbo, Zhejiang, China., Sheng C; Department of Anesthesiology, Ningbo No.6 Hospital, Ningbo, Zhejiang, China.; Ningbo Clinical Research Center for Orthopedics, Sports Medicine & Rehabilitation, Ningbo, Zhejiang, China., Huang X; Department of Operating Room, Ningbo Hospital of Integrated Traditional Chinese and Western Medicine, Ningbo, Zhejiang, China., Yuan L; Department of Anesthesiology, Ningbo No.6 Hospital, Ningbo, Zhejiang, China.; Ningbo Clinical Research Center for Orthopedics, Sports Medicine & Rehabilitation, Ningbo, Zhejiang, China., Zhu M; Department of Anesthesiology, Ningbo No.6 Hospital, Ningbo, Zhejiang, China.; Ningbo Clinical Research Center for Orthopedics, Sports Medicine & Rehabilitation, Ningbo, Zhejiang, China.
Source: Frontiers in medicine [Front Med (Lausanne)] 2026 May 28; Vol. 13, pp. 1865264. Date of Electronic Publication: 2026 May 28 (Print Publication: 2026).
Publication Type: Journal Article
Journal Info: Publisher: Frontiers Media S.A Country of Publication: Switzerland NLM ID: 101648047 Publication Model: eCollection Cited Medium: Print ISSN: 2296-858X (Print) Linking ISSN: 2296858X NLM ISO Abbreviation: Front Med (Lausanne) Subsets: PubMed not MEDLINE
Database: MEDLINE Ultimate
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ISSN:2296-858X
DOI:10.3389/fmed.2026.1865264