Barium SulfateBariumBarium CompoundsEnemaStrontiumDiverticulum, ColonSigmoidoscopyMacrocystisColonic DiseasesColonoscopyDeglutition DisordersContrast MediaEsophageal AchalasiaBarium RadioisotopesPotassiumFluoroscopyHernia, HiatalDeglutitionLaminariaManometryMembrane PotentialsEsophagusCalciumCholecystographyPotassium ChannelsColonography, Computed TomographicEsophageal DiseasesGastrointestinal HemorrhageDiverticulum, EsophagealElectron Probe MicroanalysisIntestinal ObstructionDiatrizoate MeglumineOccult BloodBisacodylIntussusceptionCesiumWater WellsCecal DiseasesRespiratory AspirationIon ChannelsDuodenal DiseasesCalcium ChannelsColon, SigmoidDiverticulosis, ColonicRectumMicroradiographyMegacolonPotassium Channel BlockersZeolitesChloridesIleal DiseasesExplosive AgentsGastrointestinal TransitMetal Ceramic Alloys4-AminopyridineCations, DivalentGallopamilMelenaEsophageal Sphincter, LowerTetraethylammoniumColonic PolypsRadiography, AbdominalRadiographyIntestinal PolypsStomach VolvulusElectrophysiologyDiverticulumElectric ConductivityTetraethylammonium CompoundsPatch-Clamp TechniquesDiverticulitis, ColonicCatharticsIntestinal FistulaDuodenal ObstructionPneumonia, AspirationCalcium Channel BlockersRana catesbeianaEsophagoscopyIleocecal ValvePliabilityFundoplicationCadmiumEndoscopy