Dr WALID SELLAMIAssociate Professor of Anesthesia and Intensive CareUniversity of Tunis el-ManarFaculty of Medicine of TunisDepartment of anesthesia and intensive careMain Military Hospital of Instruction of Tunis1008, Montefleury, Tunis, TUNISIATEL : (00216) 97 63 86 47Mail : drsellamiwalid@yahoo.frWalid.sellami@fmt.utm.tn