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Heike Vogelsang, Alexander Lang, Bilal Cevik, Nikolaj M. Botteck, Thomas Weber, Jennifer Herzog-Niescery

• \(\bf Background\) Thoracic epidural analgesia is beneficial after major abdominal surgery, though side-effects and complications are rare but potentially devastating. The incidence of catheter-related infection is approximately 5.5%. Several guidelines have been recommended to prevent complications during thoracic epidural catheterization. Tunnelling is often recommended to reduce the incidence of infections and dislocations. \(\bf Methods\) A retrospective, single-centre analysis of our acute pain service database was performed between 2010 and 2018. The hygiene measures of the German Society of Anaesthesiology have been incorporated in our standard operating protocol since 2009. The procedure remained constant, but the skin disinfectant was changed from propan-2-ol to propan-2-ol with octenidine in 2014. Tunnelling of catheters was not performed. We analysed the incidence of catheter-related infections (primary endpoint) and effect of the used disinfectant (secondary endpoint). \(\bf Results\) A total of 2755 patients underwent elective major abdominal surgery with thoracic epidural catheterization. Sixteen patients (0.6%) showed symptoms of mild catheter-related infection. Moderate or severe infections were not observed in any patient. The type of disinfectant did not show any significant effect on the incidence of infection. \(\bf Conclusion\) The incidence of catheter-related infections was low, and only mild signs of infection were observed. Non-tunnelling could be an alternative to tunnelling, especially if hygiene protocols are followed, and the duration of catheter use is short. A comprehensive database and regular examinations by trained staff are essential for early detection of abnormalities and immediate removal of the catheter, if required.