Gastroduodenoscopy using an irrigating cystoscope.
D003558:Cystoscopy; D004381:Duodenal Ulcer / Q000175:diagnosis; D004386:Duodenum; D019723:Endoscopes; D005336:Fiber Optic Technology; D020699:Gastroscopes; D006801:Humans; D008722:Methods; D007507:Therapeutic Irrigation