RT Journal Article SR Electronic T1 Peripheral nerve block anesthesia/analgesia for patients undergoing primary hip and knee arthroplasty: recommendations from the International Consensus on Anesthesia-Related Outcomes after Surgery (ICAROS) group based on a systematic review and meta-analysis of current literature JF Regional Anesthesia & Pain Medicine JO Reg Anesth Pain Med FD BMJ Publishing Group Ltd SP 971 OP 985 DO 10.1136/rapm-2021-102750 VO 46 IS 11 A1 Stavros G Memtsoudis A1 Crispiana Cozowicz A1 Janis Bekeris A1 Dace Bekere A1 Jiabin Liu A1 Ellen M Soffin A1 Edward R Mariano A1 Rebecca L Johnson A1 George Go A1 Mary J Hargett A1 Bradley H Lee A1 Pamela Wendel A1 Mark Brouillette A1 Sang Jo Kim A1 Lila Baaklini A1 Douglas S Wetmore A1 Genewoo Hong A1 Rie Goto A1 Bridget Jivanelli A1 Vassilis Athanassoglou A1 Eriphili Argyra A1 Michael John Barrington A1 Alain Borgeat A1 Jose De Andres A1 Kariem El-Boghdadly A1 Nabil M Elkassabany A1 Philippe Gautier A1 Peter Gerner A1 Alejandro Gonzalez Della Valle A1 Enrique Goytizolo A1 Zhenggang Guo A1 Rosemary Hogg A1 Henrik Kehlet A1 Paul Kessler A1 Sandra Kopp A1 Patricia Lavand'homme A1 Alan Macfarlane A1 Catherine MacLean A1 Carlos Mantilla A1 Dan McIsaac A1 Alexander McLawhorn A1 Joseph M Neal A1 Michael Parks A1 Javad Parvizi A1 Philip Peng A1 Lukas Pichler A1 Jashvant Poeran A1 Lazaros Poultsides A1 Eric S Schwenk A1 Brian D Sites A1 Ottokar Stundner A1 Eric C Sun A1 Eugene Viscusi A1 Effrossyni Gina Votta-Velis A1 Christopher L Wu A1 Jacques YaDeau A1 Nigel E Sharrock YR 2021 UL http://rapm.bmj.com/content/46/11/971.abstract AB Background Evidence-based international expert consensus regarding the impact of peripheral nerve block (PNB) use in total hip/knee arthroplasty surgery.Methods A systematic review and meta-analysis: randomized controlled and observational studies investigating the impact of PNB utilization on major complications, including mortality, cardiac, pulmonary, gastrointestinal, renal, thromboembolic, neurologic, infectious, and bleeding complications.Medline, PubMed, Embase, and Cochrane Library including Cochrane Database of Systematic Reviews, Cochrane Central Register of Controlled Trials, NHS Economic Evaluation Database, were queried from 1946 to August 4, 2020.The Grading of Recommendations Assessment, Development, and Evaluation approach was used to assess evidence quality and for the development of recommendations.Results Analysis of 122 studies revealed that PNB use (compared with no use) was associated with lower ORs for (OR with 95% CIs) for numerous complications (total hip and knee arthroplasties (THA/TKA), respectively): cognitive dysfunction (OR 0.30, 95% CI 0.17 to 0.53/OR 0.52, 95% CI 0.34 to 0.80), respiratory failure (OR 0.36, 95% CI 0.17 to 0.74/OR 0.37, 95% CI 0.18 to 0.75), cardiac complications (OR 0.84, 95% CI 0.76 to 0.93/OR 0.83, 95% CI 0.79 to 0.86), surgical site infections (OR 0.55 95% CI 0.47 to 0.64/OR 0.86 95% CI 0.80 to 0.91), thromboembolism (OR 0.74, 95% CI 0.58 to 0.96/OR 0.90, 95% CI 0.84 to 0.96) and blood transfusion (OR 0.84, 95% CI 0.83 to 0.86/OR 0.91, 95% CI 0.90 to 0.92).Conclusions Based on the current body of evidence, the consensus group recommends PNB use in THA/TKA for improved outcomes.Recommendation: PNB use is recommended for patients undergoing THA and TKA except when contraindications preclude their use. Furthermore, the alignment of provider skills and practice location resources needs to be ensured. Evidence level: moderate; recommendation: strong.All data relevant to the study are included in the article or uploaded as supplementary information. Systematic review and meta-analysis.