Inclusion Criteria:  Age 18-75 ASA classification I,II,III Elective surgery BMI(body mass index) 17-35 Surgery in the supine position Informed consent of the patient  Exclusion Criteria:  Pregnancy and breastfeeding Urgent indications for surgery ASA classification >III Neuromuscular diseases Polyneuropathy Diabetes Drug addiction Family history of malignant hyperthermia Allergic to propofol, fentanyl or mivacurium