Perioperative CareAntibiotic ProphylaxisSurgical Wound InfectionAnti-Bacterial AgentsPerioperative PeriodPostoperative ComplicationsIntraoperative ComplicationsTreatment OutcomeMicrobial Sensitivity TestsRetrospective StudiesSurgical Procedures, OperativePreoperative CareDrug Resistance, BacterialDrug Resistance, MicrobialIntraoperative PeriodStreptomycesIntraoperative CarePerioperative NursingSurgical Procedures, ElectiveTime FactorsAntibiotics, AntineoplasticAminoglycosidesBlood Loss, SurgicalAnesthesiaProspective StudiesBacterial InfectionsVascular Surgical ProceduresRisk FactorsBacteriaAnesthesia, GeneralLength of StayEndarterectomy, CarotidPostoperative CareGentamicinsDrug UtilizationCardiac Surgical Proceduresbeta-LactamsPremedicationRisk Assessment