Sevoflurane Protective Effect on Ischemia-reperfusion Injury. Multicenter, Randomized Controlled Trial

This study aimed to evaluate the possible protective effect of anesthetic technique balanced(with sevoflurane) compared with total intravenous anesthetic technique (propofol,remifentanil). The hypothesis is that the Sevoflurane may exert protective effect in regard to the ischemia-reperfusion injury induced on the microsurgical breast free flap during transfer to receiving area. The investigators will evaluate the continuous flap tissue oximetry and the level of biochemical markers.