SpineSpinal DiseasesCervical VertebraeCardiac Surgical ProceduresOrthopedic ProceduresSpinal FusionPostoperative ComplicationsLumbar VertebraeDiskectomyPerioperative CareMonitoring, IntraoperativeBariatric SurgeryNeurosurgical ProceduresLaminectomyPostoperative CareDecompression, SurgicalTreatment OutcomeSurgical Procedures, ElectiveBlood Loss, SurgicalProspective StudiesPostoperative PeriodDura MaterThoracic SurgeryRetrospective StudiesIntraoperative ComplicationsVascular Surgical ProceduresPreoperative CareSpinal StenosisIntervertebral Disc DisplacementSurgical Wound InfectionThoracic VertebraeNeuronavigationProne PositionObesity, MorbidPreoperative PeriodLength of StayCoronary Artery BypassKnee-Chest PositionTime FactorsPain, PostoperativeHospitals, High-VolumeCardiopulmonary BypassFailed Back Surgery SyndromeBlood Transfusion, AutologousReoperationRisk FactorsFollow-Up StudiesDelayed Emergence from AnesthesiaSurgical Procedures, OperativeAmbulatory Surgical ProceduresRisk AssessmentSpinal Cord CompressionSpinal FracturesGeneral SurgeryOrthopedic Fixation DevicesEvoked Potentials, SomatosensoryIntervertebral Disc DegenerationScoliosisPain MeasurementOutcome Assessment (Health Care)Thoracic Surgical ProceduresBrachial Plexus NeuritisSpondylolisthesisOrthognathic Surgical ProceduresOptic Neuropathy, IschemicHoarsenessHemostasis, SurgicalAnesthetics, IntravenousIntubation, IntratrachealPharyngeal DiseasesHeart ValvesEsophageal PerforationRetinal Artery OcclusionPredictive Value of TestsSurgical Procedures, Minimally InvasiveBone ScrewsOral Surgical ProceduresIntraoperative CareSternumIntraoperative PeriodCardiovascular Surgical ProceduresInternal FixatorsBlood TransfusionAntifibrinolytic AgentsHospitals, SpecialChi-Square DistributionMultivariate AnalysisIncidenceSpinal Cord DiseasesPerioperative PeriodHospital MortalityFluid TherapySpinal InjuriesPremedicationGastric BypassGynecologic Surgical ProceduresFluoroscopyPeripheral Vascular DiseasesOximetryMonitoring, Physiologic