Problems of gastrointestinal function are usually not well diagnosed by endoscopy since motion or secretion of the gastrointestinal tract is not easily inspected by<unk> . Nonetheless, findings such as excess fluid or poor motion of the gut during endoscopy can be suggestive of disorders of function. Irritable bowel syndrome and functional dyspepsia are not diagnosed with<unk> , but<unk>  may be helpful in excluding other diseases that mimic these common disorders.
Esophagogastroduodenoscopy
Nasoendoscopy
Magnetogastrography
Electrogastrogram
Endoscopic ultrasound
Chromoendoscopy
GI cocktail
Sialoendoscopy