['total intravenous anesthesia', 'desflurane', 'obesity', 'pain, postoperative', 'nausea, postoperative']
['desflurane']

        Inclusion Criteria:

          -  BMI ≥35 kg/m2 with at least one comorbid condition or BMI ≥40 kg/m2.

        Exclusion Criteria:

          -  drug abuse

          -  severe mental illness

          -  age<18

          -  serious medical condition; cancer, end-stage lung disease (ASA>3) or allergies to any
             drugs used in the study
      