title: Tension pneumoperitoneum as a nontraumatic complication of upper gastrointestinal endoscopy.
mesh_terms: D000368:Aged; D000399:Air Pressure; D005773:Gastroscopy / Q000009:adverse effects*; D006801:Humans; D008297:Male; D010438:Peptic Ulcer Hemorrhage / Q000175:diagnosis; D010439:Peptic Ulcer Perforation / Q000209:etiology*; D011027:Pneumoperitoneum / Q000209:etiology*; D013276:Stomach Ulcer / Q000150:complications*