Abdomen quiz 1 - Questions
Erect abdominal radiographs are routinely used to diagnose pneumoperitoneum
Riglers Sign describes the appearance of free gas beneath the diaphragm in a pneumoperitoneum
If there is a small amount of free gas present it is more likely to be seen under the right hemidiaphragm than the left on plain films.
A CT scan can be a useful test in equivocal cases of pneumoperitoneum.
Chilaiditi's syndrome is a cause of pneumoperitoneum.
Bowel folds do not usually cross the whole bowel lumen in large bowel obstruction.
The large bowel can dilate to a maximum of 4cm to 5cm.
It can be difficult to differentiate between pseudoobstruction and large bowel obstruction on plain radiographs.
The most common cause of large bowel obstruction is a tumour.
If the ileocaecal valve is incompetent, dilatation of the small bowel is unlikely to develop if the large bowel is obstructed.