Evaluation of the Impact of dexmedetomidine as an adjunct for local infiltrations analgesia and ultrasound-based regional anaesthesia as pain medication in regard to patients' opioid need the first 48 hours after the total knee replacement operation. Secondary objectives are: Pain assesment, Pain medication necessary, functionality of the prothesis, satisfaction, wellbeing, postoperative discomforts, complications (delirium, allergic reactions, cardiopulmonary decompensation), procedure specific time.
Evaluation of the Impact of dexmedetomidine as an adjunct for local infiltrations analgesia and ultrasound-based regional anaesthesia as pain medication in regard to patients' opioid need the first 48 hours after the total knee replacement operation.