Conscious SedationAnesthesia, DentalHypnotics and SedativesDeep SedationDepressionMidazolamHydroxyzinePropofolPreanesthetic MedicationAnesthetics, IntravenousAnesthesia, LocalDental AnxietyAnesthesia, RectalAnesthesia, GeneralAlphaprodineAnesthesia Recovery PeriodConsciousnessMeperidineChloral HydrateEndoscopy, Digestive SystemDentistry, OperativeAnesthesia, IntravenousBurns, ElectricDiazepamManifest Anxiety ScaleDental ImplantationGastric BalloonDexmedetomidineDepressive DisorderNitrous OxideFentanylEndoscopy, GastrointestinalTooth ExtractionDepression, PostpartumAnxietyProspective StudiesCortical Spreading DepressionColonoscopyIntubation, IntratrachealDepressive Disorder, MajorPatient SatisfactionCholangiopancreatography, Endoscopic RetrogradeDouble-Blind MethodBronchoscopyTreatment OutcomePainInjections, IntravenousAntidepressive AgentsPilot ProjectsQuestionnairesPsychiatric Status Rating ScalesTime FactorsNeurosurgical ProceduresLong-Term Synaptic DepressionOxygenEquipment DesignHeart RateAnalgesiaRetrospective StudiesBlood PressureDogs