Modified first-targeted ultrasound window for selective brachial plexus trunk block may reduce the incidence of hemi-diaphragmatic paralysis

From the Department of Anesthesiology, Guangdong Provincial People's Hospital (Guangdong Academy of Medical Sciences), Southern Medical University, Guangzhou, Guangdong, China (QL), and the Department of Anesthesiology, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong, China (WY) Correspondence to Weifeng Yao, Department of Anesthesiology, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong 510630, China. Tel: +86 13416179794; e-mail: [email protected]