Conscious SedationAnesthesia, DentalHypnotics and SedativesDeep SedationMidazolamHydroxyzinePropofolPreanesthetic MedicationAnesthetics, IntravenousAnesthesia, LocalDental AnxietyAnesthesia, RectalAnesthesia, GeneralAlphaprodineAnesthesia Recovery PeriodConsciousnessMeperidineEndoscopy, Digestive SystemChloral HydrateDentistry, OperativeAnesthesia, IntravenousBurns, ElectricDiazepamDental ImplantationManifest Anxiety ScaleGastric BalloonDexmedetomidineNitrous OxideEndoscopy, GastrointestinalFentanylTooth ExtractionOutpatient Clinics, HospitalAmbulatory CareProspective StudiesPatient SatisfactionColonoscopyIntubation, IntratrachealCholangiopancreatography, Endoscopic RetrogradeDouble-Blind MethodBronchoscopyInjections, IntravenousTreatment OutcomePilot ProjectsPainNeurosurgical ProceduresRetrospective StudiesTime FactorsAnxietyAmbulatory Surgical ProceduresOxygenEquipment DesignAnalgesiaHeart RateQuestionnairesBlood Pressure