Perioperative Magnesium Sulphate as a Cerebral Protector in Neurosurgical Patients

"At the beginning of the neurosurgery, the subjects are going to receive one 4gr bolus in Sodium Chloride 100 mL, lasting 20 minutes, intravenously.~After that, a intravenously perfusion of Magnesium Sulfate 20 gr, in Sodium Chloride 1000 mL, lasting 24 hours, will be started."

"At the beginning of the neurosurgery, the subjects are going to receive a bolus of Sodium Chloride 100 mL, lasting 20 minutes, intravenously.~After that, a intravenously perfusion of Sodium Chloride 1000 mL, lasting 24 hours, will be started."