Abdel-fattah, MohamedJohnson, DianaConstable, LyndaThomas, RuthCotton, SeonaidhTripathee, SheelaCooper, DavidBoran, SueDimitropoulos, KonstantinosEvans, SuzanneGranitsiotis, ParaskeveHashim, HashimKilonzo, MaryLarcombe, JamesLittle, PaulMacLennan, SaraMurchie, PeterMyint, PhyoN’Dow, JamesNorrie, JohnOmar, Muhammad ImranPaterson, CatherineScotland, GrahamThiruchelvam, NikeshMacLennan, Graeme2022-08-052022-08-052022-12Abdel-fattah, M, Johnson, D, Constable, L, Thomas, R, Cotton, S, Tripathee, S, Cooper, D, Boran, S, Dimitropoulos, K, Evans, S, Granitsiotis, P, Hashim, H, Kilonzo, M, Larcombe, J, Little, P, MacLennan, S, Murchie, P, Myint, P, N’Dow, J, Norrie, J, Omar, M I, Paterson, C, Scotland, G, Thiruchelvam, N & MacLennan, G 2022, 'Randomised controlled trial comparing the clinical and cost-effectiveness of various washout policies versus no washout policy in preventing catheter associated complications in adults living with long-term catheters: study protocol for the CATHETER II study', Trials, vol. 23, no. 1, 630. https://doi.org/10.1186/s13063-022-06577-21745-6215RIS: urn:4D971D320391AFA8D1C30C4998A32A93RIS: Abdel-fattah2022ORCID: /0000-0001-9646-3904/work/117057487ORCID: /0000-0001-9968-5991/work/117057536ORCID: /0000-0003-1405-6964/work/117057548ORCID: /0000-0002-1039-5646/work/117057597ORCID: /0000-0002-1597-3126/work/117057703ORCID: /0000-0003-3852-6158/work/163198464ORCID: /0000-0002-3450-4536/work/170010805ORCID: /0000-0003-0479-1228/work/176370675ORCID: /0000-0001-5340-0081/work/177758190ORCID: /0000-0002-8316-2616/work/177759894https://hdl.handle.net/2164/19020Acknowledgements We gratefully acknowledge B. Braun Medical AG for donating the supply of washout solutions for use in the CATHETER II study. We are grateful for the secretarial and data coordination support from Dianne Dejean. The research team acknowledges the support from the NHS Research Scotland Primary Care Network (particularly Amanda Cardy for support in patient recruitment). The authors also gratefully acknowledge the support of the Centre for Healthcare Randomised Trials; the Clinical Research Networks; the site teams, participants and their carers; and the Trial Steering and Data Monitoring Committees. We are also grateful to Hanne Bruhn for her help in drafting some of the patient-facing documentation for the study.121697699engCatheter blockageCatheter washout solutionsCatheter maintenance solutionsIndwelling catheterLong-term catheterSymptomatic catheter-associated urinary tract infectionR MedicineSupplementary InformationRJournal article10.1186/s13063-022-06577-2231