Mechanomyography Reloaded? A Randomized Prospective Agreement Study

Inclusion Criteria: * age ≥ 18 years * ASA \< 3 * scheduled for non-cardiac surgery requiring general anaesthesia and neuromuscular blockade for optimisation of surgical conditions * positioning during surgery with intraoperative access to both arms Exclusion Criteria: * allergy to muscle relaxants and reversal agents * neuromuscular disease * procedure is scheduled outside the operating room * need of endotracheal intubation prior to surgery * need of rapid sequence induction * pregnancy, breastfeeding or 30 days postpartum * surgical procedure or examination findings which are a contraindication for a supraglottic airway device * employee of the investigator or study site directly involved in this study or other studies under the direction of the investigator or study site * family member of the investigator * custodial accommodation * alcohol or drug abuse * patients with preceding injuries impairing muscle or nerve function of the arm * Participation in other studies with investigational drugs or devices within 4 weeks prior to screening or missing agreement not to participate in any other study at the same time or within a period of one month after the MEMORY study