Which adjunctive lab tests are used in the evaluation of small-bowel obstruction (SBO)?

Updated: Apr 28, 2017
  • Author: Mityanand Ramnarine, MD, FACEP; Chief Editor: Steven C Dronen, MD, FAAEM  more...
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Answer

The following are adjunctive laboratory tests used in the evaluation of SBO:

  • Serum chemistries: Rarely abnormal early in the disease unless due to vomiting or dehydration 

  • BUN/creatinine levels: May be elevated in dehydration due to vomiting 

  • CBC count: Elevation can be associated with complications 

  • Serum lactate levels: Elevation is suggestive of dehydration or tissue hypoperfusion

  • Urinalysis

  • Type and crossmatch

  • PT, PTT, and INR measurements


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