Nasogastric air insufflation in early diagnosis of perforated peptic ulcer.
D000006:Abdomen, Acute / Q000175:diagnosis*; D006801:Humans; D007441:Intubation, Gastrointestinal; D010439:Peptic Ulcer Perforation / Q000000981:diagnostic imaging*; D011028:Pneumoperitoneum, Artificial; D011859:Radiography