EnemaBarium SulfateColonoscopyDiverticulum, ColonSigmoidoscopyBariumColonic DiseasesColonic PolypsOccult BloodColonography, Computed TomographicBisacodylColorectal NeoplasmsDiverticulosis, ColonicColonoscopesIntestinal PolypsColon, SigmoidRectumIntussusceptionCecal DiseasesMegacolonCatharticsBarium CompoundsGastrointestinal HemorrhageDiverticulitis, ColonicIntestinal ObstructionSigmoid DiseasesMass ScreeningIleal DiseasesAppendixEarly Detection of CancerColonic NeoplasmsColonRectal DiseasesIntestine, LargeAdenomaColostomyRectal NeoplasmsContrast MediaColectomyAdenomatous PolypsIntestinal FistulaHemostatic TechniquesColitis, UlcerativeAdministration, RectalHirschsprung DiseaseGastroenterologyMesalamineRetrospective StudiesSensitivity and SpecificityTherapeutic IrrigationPhosphorothioate OligonucleotidesPicolinesProspective StudiesEndoscopy, GastrointestinalConscious Sedation