Conscious SedationAnesthesia, DentalHypnotics and SedativesDeep SedationMidazolamHydroxyzinePropofolPreanesthetic MedicationAnesthetics, IntravenousAnesthesia, LocalAnesthesia Recovery PeriodDental AnxietyAnesthesia, RectalAnesthesia, GeneralAlphaprodineConsciousnessMeperidineChloral HydrateEndoscopy, Digestive SystemDentistry, OperativeAnesthesia, IntravenousBurns, ElectricDiazepamDental ImplantationManifest Anxiety ScaleGastric BalloonDexmedetomidineRecovery of FunctionNitrous OxideEndoscopy, GastrointestinalFentanylTooth ExtractionColonoscopyIntubation, IntratrachealProspective StudiesPatient SatisfactionCholangiopancreatography, Endoscopic RetrogradeBronchoscopyInjections, IntravenousDouble-Blind MethodNeurosurgical ProceduresTime FactorsPainPilot ProjectsTreatment OutcomeOxygenEquipment DesignAnxietyHeart RateAnalgesiaRetrospective StudiesBlood PressureDogs