Clinical Research Directory

Inclusion Criteria: * Patients operated for a scheduled colorectal resection due to cancer, diverticulitis, or Chronic Inflammatory Bowel Disease, * American Society of Anesthesiologists score 1-2 * The patient must have given their free and informed consent and signed the consent form * The patient must be a member or beneficiary of a health insurance plan Exclusion Criteria: * Patient taking antidepressants, antipsychotics, antihypertensive beta blocker type, anti-arythmic or oral contraception * Uncontrolled diabetes or associated with a neuropathy * Arrhythmias and conduction disturbances, , coronaropathy and heart failure, kidney failure * Neuropathies * Pacemaker or defibrillator * The subject is participating in another interventional study, or is in a period of exclusion determined by a previous study * The subject refuses to sign the consent * It is impossible to give the subject informed information * The patient is under safeguard of justice or state guardianship