Accelerometric Assessment of neuromuscular block during anaesthesia is routinely performed at the M. adductor pollicis. However, many operations require positioning of the patients with arms attached to the body. In these situations, the anaesthesiologist has no access to the m.adductor pollicis.

In this study, a new position of accelerometry at the neck is evaluated: Stimulation of the n. accessorius with accelerometry of the m. trapezius.

Inclusion Criteria:

• Patients undergoing general anaesthesia with endotracheal intubation
• weight 50-90 kg

Exclusion Criteria:

• Pregnancy
• allergy to one of the drugs used
• risk of pulmonary aspiration
• expected difficulties with endotracheal intubation
• intake of drugs known to influence neuromuscular block
• infection (CRP > 0,5 mg/dl, leukocyte count > 12000/µl)