Department of SurgeryRuijin Clinical Medical CollegeShanghai Jiao Tong UniversityPerioperative periodDefinition not well establishedImportance directly related to the outcome of surgery itselfComposition preoperative preparation&postoperative management 1.Elective surgery2.Restrictive surgery3.Emergent surgeryPreoperative PreparationThe principle Different preparation for different operationThe classification of operations according to the characteristics of operationsl To confirm the diagnosisl
