The Knee41(2023)391-396Contents lists available at ScienceDirectKheeThe KneeELSEVIERjournal homepage:Consensus statement on unicompartmental knee replacement:A collaboration between BASK and EKSAndrew Priceab*,Emmanuel Thienpontb,Fabio Catanib,Simon Abram2,Anders Troelsenb,The BASK and EKS Consensus GroupBritish Association for Surgery of the Knee (BASK)European Knee Society(EKS)ARTICLE INFOABSTRACTBackground:The aim of this study was to deliver consensus recommendations for the clin-ical practice of unicompartmental knee arthroplasty (UKA).Methods:Members of the British Association for Surgery ofthe Knee(BASK)and EuropeanKnee Society (EKS)were invited to attend a joint meeting in London,UK(December 2019).A formal consensus process was undertaken at the meeting incorporating a multiple roundDelphi exercise,with group discussion of areas of agreement and disagreement betweenrounds.Eighty delegates attended the meeting and five consensus statements were consid-ered and revised,with a threshold level of 80%agreement required as the definition con-sensus.Results:Five consensus statements with accompanying supporting evidence and text wereagreed following two rounds of the process:(1)UKA should be offered as a successful alter-native to TKA in patients undergoing arthroplasty who meet agreed indications:(2)Whenconsenting a patient for UKA,information including the benefits and risks that are specificto UKA,should be tailored to and discussed with the individual patient:(3)Evidence sug-gests that surgeons should avoid low-volume use of UKA to optimise outcomes for theirpatients;(4)Surgeons should use the contemporary evidence-based indications and con-traindications for medial UKA:(5)Knee arthroplasty surgeons should have exposure toand training in UKA.Conclusions:The agreed joint BASK-EKS consensus statements on UKA practice are recom-mended as the contemporary basis of optimal care for these patients and should informfuture training and service developments.2023 Published by Elsevier B.V.1.IntroductionUnicompartmental knee arthroplasty(UKA)has a long history,but has not been established as a treatment at the samelevel with total knee arthroplasty(TKA).In contemporary literature,there is emerging and solid evidence that UKA,when per-formed in correctly selected cases,holds multiple advantages for patients.There is a trend that the evidence is now beingadopted into guidelines supporting the first line treatment with UKA in eligible patients with end stages of knee osteoarthritis.The professional societies play an Important role in advocating state-of art approaches to for example practice patternsand surgical behaviour.BASK(British Association for Surgery of the Knee)and EKS (European Knee Society)are two suchsocieties that sought to collaborate in the creation of a consensus statement on medial or lateral unicompartmental kneeCorresponding author at:Nuffield Orthopaedic Centre,NDORMS.University of Oxford,Windmill Road,Hedington,Oxford OX2 9JA,UK.E-mai