- Complete obstruction;
- 2 populations of bowel
- Gravelling in dilated bowel
- Gas trapping within distended intestine
- Abrupt lines- abrupt air and soft tissue demarcation in dilated bowel means foreign body (obstructive pattern).
The amount of bowel that is distended depends on the location of the obstruction;
If the obstruction is proximal- only a small amount of the intestine is dilated but the stomach is dilated
If the obstruction is distal, a large amount of the intestine is dilated but the stomach is not usually fluid distended.
Acute obstructions tend to have little to no gravelling and less severely distended bowel.