• Yuqing Zeng, Junming Wan, Haiyong Ren, Jianwei Lu, Fuhua Zhong, and Shu Deng.
• The First Clinical Medical College, Guangzhou University of Chinese Medicine, 16 Jichang Road, Baiyun District, Guangzhou, 510405, Guangdong Province, People's Republic of China.
• BMC Anesthesiol. 2019 Apr 9; 19 (1): 49.

BackgroundAlthough several anesthesia procedures have been explored for orthopedic surgery, the complications of anesthesia remain not well resolved. This study aimed to explore the influence of different anesthesia methods on the complications after orthopedic surgery.MethodsAccording to the searching strategy, anesthesia associated studies in orthopedic surgery were screened from Pubmed, Embase, and the Cochrane Library up to Mar. 10th, 2018. Then, complications and demographic data were extracted and quality of studies was assessed using Cochrane Collaboration recommendations. ADDIS software was used to perform the network meta-analysis. Pooled effect size was calculated using random effective model or consistency model, and presented with odds ratio (OR) and 95% confidence interval (CI).ResultsAccording to the selective criteria, a total of 23 studies with 2393 patients were enrolled in this study. Quality assessment revealed all studies had an ordinary quality. Network meta-analyses revealed that nerve block analgesia (NBA) presented a lower effect on the occurrence of post-operative nausea or vomiting (PONV; OR = 0.17, 95% CI: 0.06-0.39) and urine retention (OR = 0.07, 95% CI: 0.01-0.37) compared with epidural anesthesia (EA). Interscalene block (ISB) and local infiltration analgesia (LIA) could significantly reduce the occurrence of back pain compared with EA (OR = 0.00, 95% CI = 0.00-0.30; OR = 0.00, 95% CI = 0.00-0.25).ConclusionNBA presented an effective role in reliving the occurrence of PONV and urine retention, and ISB and LIA relieved the back pain compared with EA after orthopedic surgery.

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