The purpose of this study is to test the hypothesis that sympathetic neural outflow to muscles as well as a sympathetic baroreflexes are not altered during xenon anesthesia in Healthy Volunteers.

Objectives for this study :

• Main Objective : Influence of Xenon anesthesia on Sympathetic Nervous Activity
• Secondary Objectives : Security under LENOXe™ (xénon 100 % v/v) anesthesia

Inclusion Criteria:

• Healthy volunteers > 18 years and < 65 years of age
• ASA physical status I
• Legal competence
• for whom the consent form has been signed

Exclusion Criteria:

• Healthy volunteers < 18 years and > 65 years of age
• Pregnancy, lactation period or missing secure anticonvulsive therapy
• Missing legal competence
• Participation in other clinical trials
• Contraindications as mentioned on §4.3 of the SPCs of LENOXe™ (xénon 100 % v/v)
• Any medication especially of Sildenafil (Viagra®) or other potency remedy
• Existing relationship of dependency to the sponsor or the investigator