Analysis of cardiopulmonary stress during endoscopy: Is unsedated transnasal esophagogastroduodenoscopy appropriate for elderly patients?

BACKGROUND: Transnasal esophagogastroduodenoscopy (EGD) without sedation has been reported to be safe and tolerable. It has recently been used widely in Japan for the detection of upper gastrointestinal disease. Alternatively, transoral examination using a thin endoscope has also been reported to be highly tolerable.