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Free air. The presence of free intraperitoneal air is proof of bowel perforation, and indicates a surgical emergency. A pneumoperitoneum has only two frequent causes: - Perforation of a gastric ulcer - Perforation of colonic diverticulitis . Free air is usually not seen in perforated appendicitis).
There are at least six causes of the gasless abdomen in the adult. A specific cause of the gasless abdomen can usually be made when the patient's history is known. The most serious cause of the gasless abdomen is small-bowel obstruction with or without ischemia.
Free gas, or pneumoperitoneum, is gas or air trapped within the peritoneal cavity, but outside the lumen of the bowel. Pneumoperitoneum can be due to bowel perforation, or due to insufflation of gas (CO2 or air) during laparoscopy.
8 lis 2022 · Urachus Sign: In the supine abdominal radiograph, the free air of pneumoperitoneum outlines the median umbilical ligament and appears as a urachus sign. The median umbilical ligament is formed by the obliteration of urachus (remnants of the canal drain urine in the fetus).
Pneumoperitoneum is the presence of free air in the abdominal cavity seen on plain abdominal radiography or with CT imaging. This can be due to a wide variety of etiologies. In 66% of these cases, this will present as a surgical emergency with peritonitis.
The current article revolves upon the challenge of diagnosing free peritoneal air in an abdominal X-ray. We present an 80 year old lady who was admitted due to abdominal pain and vomiting. On an acute abdomen XR series, a small amount of free air was suspected, but this was inconclusive.
