Conscious SedationAnesthesia, DentalHypnotics and SedativesDeep SedationMidazolamHydroxyzinePropofolPreanesthetic MedicationAnesthetics, IntravenousAnesthesia, LocalDental AnxietyAnesthesia, RectalAnesthesia, GeneralAlphaprodineAnesthesia Recovery PeriodConsciousnessMeperidineChloral HydrateEndoscopy, Digestive SystemDentistry, OperativeBurns, ElectricAnesthesia, IntravenousDiazepamDental ImplantationManifest Anxiety ScaleGastric BalloonDexmedetomidineNitrous OxideEndoscopy, GastrointestinalFentanylTooth ExtractionColonoscopyIntubation, IntratrachealProspective StudiesPatient SatisfactionCholangiopancreatography, Endoscopic RetrogradeBronchoscopyInjections, IntravenousDouble-Blind MethodNeurosurgical ProceduresPainPilot ProjectsTreatment OutcomeOxygenEquipment DesignAnxietyTime FactorsAnalgesiaRetrospective StudiesHeart Rate