Prediction of Hemodynamic Response to Intubation by ANI Variation During Standardized Stimulation

Inclusion Criteria: * Any patient requiring general anaesthesia with tracheal intubation by direct laryngoscopy * Intubation Difficulty Assessment Score \< 7 * BMI between 17 and 30 Kg/m2 * Socially insured patient * Patient 18 years of age or older * Patient with signed consent * Patient with a sinus heart rhythm Exclusion Criteria: * Patient refusing to participate in the study * Pregnant woman * Patient with a pace maker (any mode) * Patient treated with Beta Blocker * Known Dysautonomia * Diabetes * Spontaneous ventilation anaesthesia * Allergy to any of the required medications