Evaluation of Brain Damage Resulting From Carotid Endarterectomy With Xenon Anesthesia

Inclusion Criteria: * The patient must have given his/her informed and signed consent * The patient must be insured or beneficiary of a health insurance plan * Patients with American Society of Anesthesiology (ASA) scores of 1 to 4 * Patient schelduled for carotid endarterectomy Exclusion Criteria: * The patient is participating in another study * The patient is in an exclusion period determined by a previous study * The patient is under judicial protection, under tutorship or curatorship * The patient refuses to sign the consent * It is impossible to correctly inform the patient * The patient is pregnant * The patient is breastfeeding * The patient has a contra-indication for a treatment necessary for this study * The endarterectomy does not require a shunt * ASA score of 5 * Patient presenting with symptomatic gastric-oesophagien reflux * Patient has neuro-endocrine cancer * Patient has hypersensivity to one of the following substances: propofol, remifentanil, celocurine, cisatracurium, rocuronium, senon, paracetamol, tramadol * Patient suffering from obstructive respiratory insufficiency (chronic obstructive pulmonary disease, asthma) * Patient with coronary disease with severely altered cardiac function * High intracranial pressure * Patient requiring high concentrations of oxygen (SpO2 \< 92% normal air) * Patient with neuro-sensorial deficit that, in the absence of a prothesis, prevents reading, writing, or responding to simple orders * Patient suffering from myopathy or recent rhabdomyolysis * Patient with psychiatric pathology or chronic alcohol consumption or consumption of another substance that interferes with understanding * Lack of contraception for women of child-bearing age * History of or suspected malignant hyperthermia * Patients with liver damage, jaundice, unexplained fever or eosinophilia after administration of a halogenated anesthetic * Patient has undergone a recent multiple trauma (\<1 month) * Patient who received general anesthesia within the past 7 days