Conscious SedationAnesthesia, DentalHypnotics and SedativesDeep SedationMidazolamHydroxyzinePropofolPreanesthetic MedicationAnesthetics, IntravenousAnesthesia, LocalDental AnxietyAnesthesia, RectalAnesthesia, GeneralAlphaprodineAnesthesia Recovery PeriodConsciousnessMeperidineEndoscopy, Digestive SystemChloral HydrateDentistry, OperativeBurns, ElectricAnesthesia, IntravenousDiazepamDental ImplantationManifest Anxiety ScaleGastric BalloonDexmedetomidineEndoscopy, GastrointestinalNitrous OxideFentanylTooth ExtractionProspective StudiesColonoscopyIntubation, IntratrachealPatient SatisfactionCholangiopancreatography, Endoscopic RetrogradeBronchoscopyNeurosurgical ProceduresTreatment OutcomeDouble-Blind MethodInjections, IntravenousPainPilot ProjectsTime FactorsEquipment DesignRetrospective StudiesOxygenAnxietyAnalgesiaHeart RateBlood Pressure