Conscious SedationAnesthesia, DentalHypnotics and SedativesDeep SedationMidazolamHydroxyzinePropofolPainPreanesthetic MedicationAnesthetics, IntravenousAnesthesia, LocalDental AnxietyAnesthesia, RectalAnesthesia, GeneralAlphaprodineAnesthesia Recovery PeriodConsciousnessMeperidineEndoscopy, Digestive SystemChloral HydrateDentistry, OperativeAnesthesia, IntravenousBurns, ElectricDiazepamDental ImplantationManifest Anxiety ScaleGastric BalloonDexmedetomidinePain ManagementFentanylNitrous OxideEndoscopy, GastrointestinalTooth ExtractionChronic PainPain, PostoperativePain ThresholdPain MeasurementProspective StudiesColonoscopyIntubation, IntratrachealLow Back PainBack PainCholangiopancreatography, Endoscopic RetrogradePatient SatisfactionDouble-Blind MethodPain, IntractableBronchoscopyInjections, IntravenousAbdominal PainNeck PainTreatment OutcomeAnalgesiaPilot ProjectsNeurosurgical ProceduresPain PerceptionPelvic PainAnxietyAnalgesics, OpioidFacial PainTime FactorsOxygenEquipment DesignAnalgesicsAcute PainPain, ReferredRetrospective StudiesHeart Rate