Although there is not enough literature supporting its use, the test may serve as an initial test for patients with obscure or occult bleeding, especially if an alternative is needed for CTA or enterography. (Note: CTA is a separate procedure distinct from CT abdomen and pelvis without and with IV contrast). CT Abdomen and Pelvis Without IV Contrast In endoscopy-negative patients, there is no significant literature for CT abdomen and pelvis without IV contrast for GIB evaluation. (Note: CTA is a separate procedure distinct from CT abdomen and pelvis without IV contrast). CT Abdomen With IV Contrast In endoscopy-negative patients, there is no significant literature for CT abdomen with IV contrast for GIB evaluation. (Note: CTA is a separate procedure distinct from CT abdomen with IV contrast). Nonvariceal Upper Gastrointestinal Bleeding CT Abdomen Without and With IV Contrast In endoscopy-negative patients, there is no significant literature for CT abdomen without and with IV contrast for GIB evaluation. (Note: CTA is a separate procedure distinct from CT abdomen without and with IV contrast). CT Abdomen Without IV Contrast In endoscopy-negative patients, there is no significant literature for CT abdomen without IV contrast for GIB evaluation. (Note: CTA is a separate procedure distinct from CT abdomen without IV contrast). CT Enterography Although CT enterography is not considered useful for detection of acute bleeding due to the dilution of bleeding from oral contrast, it may be helpful in patients with negative endoscopy to identify a small bowel source of GIB. The sensitivity for detection of the cause of occult GIB is typically low, with measured sensitivity of 25% compared with capsule endoscopy (sensitivity of 87%) and 33% when compared with clinical follow-up in patients with nondiagnostic capsule endoscopy [52,53].
Nonvariceal Upper Gastrointestinal Bleeding. Although there is not enough literature supporting its use, the test may serve as an initial test for patients with obscure or occult bleeding, especially if an alternative is needed for CTA or enterography. (Note: CTA is a separate procedure distinct from CT abdomen and pelvis without and with IV contrast). CT Abdomen and Pelvis Without IV Contrast In endoscopy-negative patients, there is no significant literature for CT abdomen and pelvis without IV contrast for GIB evaluation. (Note: CTA is a separate procedure distinct from CT abdomen and pelvis without IV contrast). CT Abdomen With IV Contrast In endoscopy-negative patients, there is no significant literature for CT abdomen with IV contrast for GIB evaluation. (Note: CTA is a separate procedure distinct from CT abdomen with IV contrast). Nonvariceal Upper Gastrointestinal Bleeding CT Abdomen Without and With IV Contrast In endoscopy-negative patients, there is no significant literature for CT abdomen without and with IV contrast for GIB evaluation. (Note: CTA is a separate procedure distinct from CT abdomen without and with IV contrast). CT Abdomen Without IV Contrast In endoscopy-negative patients, there is no significant literature for CT abdomen without IV contrast for GIB evaluation. (Note: CTA is a separate procedure distinct from CT abdomen without IV contrast). CT Enterography Although CT enterography is not considered useful for detection of acute bleeding due to the dilution of bleeding from oral contrast, it may be helpful in patients with negative endoscopy to identify a small bowel source of GIB. The sensitivity for detection of the cause of occult GIB is typically low, with measured sensitivity of 25% compared with capsule endoscopy (sensitivity of 87%) and 33% when compared with clinical follow-up in patients with nondiagnostic capsule endoscopy [52,53].