Acute abdominal series: Difference between revisions
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==Background== | |||
==Diagnosis== | |||
#Films | #Films | ||
##Upright chest film: r/o free air | ##Upright chest film: r/o free air | ||
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#If pt does not tolerate upright position left lateral decub abd film can substitute | #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 | |||
*Abdominal xray has poor Sn and Sp for SBO | |||
**If concerned need CT! | |||
==See Also== | ==See Also== | ||
Revision as of 18:12, 22 October 2011
Background
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
- Abdominal xray has poor Sn and Sp for SBO
- If concerned need CT!