EndoscopyDacryocystorhinostomyNasal PolypsLacrimal Apparatus DiseasesSinusitisNose DiseasesRhinitisEndoscopy, GastrointestinalLacrimal Duct ObstructionNasal ObstructionCapsule EndoscopyNasal CavityNasal MucosaParanasal SinusesMaxillary SinusEndoscopy, Digestive SystemCranial SinusesCavernous SinusSinus of ValsalvaNasal SeptumParanasal Sinus DiseasesCarotid SinusFrontal SinusSphenoid SinusGastroscopyCoronary SinusNasal Lavage FluidEndoscopes, GastrointestinalEthmoid SinusSinus Thrombosis, IntracranialGastrointestinal HemorrhageSick Sinus SyndromeEndoscopesNoseParanasal Sinus NeoplasmsNasal DecongestantsNasal BoneEsophagoscopyCapsule EndoscopesNasal SpraysTachycardia, SinusNose NeoplasmsColonoscopyMaxillary Sinus NeoplasmsDuodenoscopyEsophageal DiseasesGastrointestinal DiseasesUpper Gastrointestinal TractGastroenterologyPilonidal SinusFiber Optic TechnologyDyspepsiaMelenaTransverse SinusesHemostasis, EndoscopicStomach DiseasesTurbinatesHelicobacter InfectionsNasal CartilagesHelicobacter pyloriSuperior Sagittal SinusEsophagitisAdministration, IntranasalBarrett EsophagusEsophagusNarrow Band ImagingPeptic Ulcer HemorrhageDuodenal UlcerOtorhinolaryngologic Surgical ProceduresHematemesisSinoatrial NodePeptic UlcerBiopsyGastroesophageal RefluxIntestinal DiseasesProspective StudiesConscious SedationNasal LavageNasal Surgical ProceduresTreatment OutcomeTomography, X-Ray ComputedStomach UlcerDouble-Balloon EnteroscopyRetrospective StudiesEsophageal and Gastric VaricesMaxillary SinusitisSinus Arrest, CardiacGastritisCerebral VeinsRhinomanometryRhinitis, Allergic, PerennialEsophagitis, PepticIntestine, SmallJejunal DiseasesRhinoplastyStomach NeoplasmsColonoscopesAtrial FibrillationDuodenumHernia, Hiatal