Acute abdominal series: Difference between revisions
m (Rossdonaldson1 moved page Acute Abdominal Series to Acute abdominal series) |
(bowel diameters) |
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#Small bowel has lines (plica circulares) all the way through the bowel | #Small bowel has lines (plica circulares) all the way through the bowel | ||
#Large bowel has lines (haustra) only halfway through the bowel | #Large bowel has lines (haustra) only halfway through the bowel | ||
Bowel Diameters: 3/6/9 rule | |||
*Small bowel - 3 cm | |||
*Colon - 6 cm | |||
*Cecum - 9 cm | |||
*Abdominal x-ray has poor Sn and Sp for SBO | *Abdominal x-ray has poor Sn and Sp for SBO | ||
Revision as of 11:55, 26 January 2015
Background
- Differs from KUB in that patient is upright vs supine on KUB
Diagnosis
- Films
- Upright chest film: r/o free air
- Upright abd film: air-fluid levels
- Supine abd film: width of bowel loops most visible (estimate of amount of distention)
- Air in colon or rectum makes complete obstruction less likely (esp if symptoms >24hr)
- If pt does not tolerate upright position left lateral decub abd film can substitute
To differentiate large and small bowel:
- Small bowel has lines (plica circulares) all the way through the bowel
- Large bowel has lines (haustra) only halfway through the bowel
Bowel Diameters: 3/6/9 rule
- Small bowel - 3 cm
- Colon - 6 cm
- Cecum - 9 cm
- Abdominal x-ray has poor Sn and Sp for SBO
- If concerned need CT