Aim of the study is an examination whether a modified perioperative pain management system, that integrates the 2017 European Society of Anaesthesiology (ESA) guidelines for treatment of postoperative Delirium, can improve patient's wellbeing in comparison to the current certified standard management.
Inclusion Criteria: * adult patients with hip fractures that have to be operated (ICD S72.01-S72.2) Exclusion Criteria: * severe liver damage * ongoing dialysis therapy * Monoamine oxidase inhibitor intake * inability to give consent to trial participation