Small bowel obstruction

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[edit] Discussion

[edit] Etiologies of adult small bowel obstruction

  • The most common cause of small bowel obstruction (SBO) in adults is adhesion (up to 75% of cases), followed by hernias and neoplasm.
  • ABCs of SBO:
    • A: Adhesions
    • B: Bulges (hernias)
    • C: Cancer (neoplasm)


[edit] Diagnosis of small bowel obstruction

  • The reported sensitivity of CT in the detection of small bowel obstruction ranges from 78% to 100% for complete or high-grade obstruction.
  • Report to the clinicians both the level of obstrucion and the degree of obstruction (i.e. partial or complete).

[edit] Imaging Findings

[edit] CT

  • Identification of dilated proximal bowel and collapsed distal bowel is diagnostic for bowel obstruction (small bowel with a caliber greater than 2.5 cm is considered dilated).
  • If a transition zone between the dilated proximal and collapsed distal bowel is detected, the diagnosis is more certain.
  • The "small bowel feces" sign uncommon but reliable indicator of small bowel obstruction. Gas bubbles mixed with particulate matter are observed in dilated small bowel loops proximal to an obstruction.

[edit] Images

Patient #1

[edit] See Also

[edit] External Links

[edit] References