Erect abdominal radiographs are routinely used to diagnose pneumoperitoneum
X
False : Erect radiographs are now rarely used even if bowel obstruction is suspected. An erect chest radiograph is more likely to demonstrate free gas.
O
False : Erect radiographs are now rarely used even if bowel obstruction is suspected. An erect chest radiograph is more likely to demonstrate free gas.
Riglers Sign describes the appearance of free gas beneath the diaphragm in a pneumoperitoneum
X
False : Riglers Sign describes the appearance of free gas on both sides of the bowel wall causing the bowel wall to be visible on the plain radiograph.
O
False : Riglers Sign describes the appearance of free gas on both sides of the bowel wall causing the bowel wall to be visible on the plain radiograph.
If there is a small amount of free gas present in a pneumoperitoneum it is more likely to be seen under the right hemidiaphragm than the left on a plain radiograph
O
True : A small amount of free gas is more likely to be seen under the right hemidiaphragm on an erect chest radiograph.
X
True : A small amount of free gas is more likely to be seen under the right hemidiaphragm on an erect chest radiograph.
A CT scan can be a useful test in equivocal cases of pneumoperitoneum
O
True : Very small amounts of free gas can be seen on a CT scan of the abdomen.
X
True : Very small amounts of free gas can be seen on a CT scan of the abdomen.
Chilaiditi's syndrome is a cause of pneumoperitoneum
X
False : Chilaiditi's syndrome describes the appearance of bowel between the liver and the right hemidiaphragm - colonic interposition. This can mimic pneumoperitoneum.
O
False : Chilaiditi's syndrome describes the appearance of bowel between the liver and the right hemidiaphragm - colonic interposition. This can mimic pneumoperitoneum.
Question 2:
T F
Bowel folds do not usually cross the whole bowel lumen in large bowel obstruction
O
True : In large bowel obstruction the bowel folds (or haustra) do not usually cross the bowel lumen.
X
True : In large bowel obstruction the bowel folds (or haustra) do not usually cross the bowel lumen.
The large bowel can dilate to a maximum of 4cm to 5cm
X
False : The large bowel can dilate to at least 6cm and often more.
O
False : The large bowel can dilate to at least 6cm and often more.
Pseudoobstruction and large bowel obstruction can be difficult to differentiate between on plain radiographs
O
True : It is difficult to deferentiate between large bowel obstruction and ileus on plain radiographs.
X
True : It is difficult to deferentiate between large bowel obstruction and ileus on plain radiographs.
The most common cause of large bowel obstruction is a tumour
O
True : The most common cause of large bowel obstruction is a tumour.
X
True : 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
X
True : If the large bowel is dilated and the ileocaecal valve is incompetent the small bowel may also become dilated. If the valve is competent the large bowel continues to become further dilated - there gas can not leave the large bowel and enter the small bowel.
O
True : If the large bowel is dilated and the ileocaecal valve is incompetent the small bowel may also become dilated. If the valve is competent the large bowel continues to become further dilated - there gas can not leave the large bowel and enter the small bowel.
