- GI Bleeding: Classification
- Upper GI Bleed: proximal to the ligament of Trietz and accounts for 70% of bleeds. Mortality rate up to 10%
- Lower GI Bleed: distal to the ligament of Trietz and accounts for 30% of cases of GI bleed. Mortality rate up to 3.6% - Imaging Techniques
- Small bowel series and conventional enteroclysis
- Computed tomography including CT enteroclysis
- CT angiography
- Tagged RBC study
- Catheter directed angiography
- Capsule endoscopy - Obscure GI Bleeding: Causes
Lower GI lesions
- Angiectasia
- Neoplasms - Obscure GI Bleeding: Causes
Middle GI lesions (over age 40)
- Angiectasia
- NSAID enteropathy
- Celiac disease - Obscure GI Bleeding: Causes
Middle GI lesions (under age 40)
- Tumors
- Meckel diverticulum
- Crohn disease
- Celiac disease - Obscure GI Bleeding: Causes
Upper GI lesions
- Varices
- Peptic ulcer
- Angiectasia
- Gastric antral vascular ectasia "Obscure GI bleeding (OGIB) is defined as loss of blood with no source identified after upper endoscopy and colonoscopy." Gastroenterologic and Radiologic Approach to Obscure Gastrointestinal Bleeding: How, Why and When?
Graca BM et al.
RadioGraphics 2010; 30:235-252 "Obscure GI bleeding (OGIB) refers to bleeding from the GI tract that persists or recurs without an obvious cause after esophagogastroduodenoscopy and colonoscopy." Gastroenterologic and Radiologic Approach to Obscure Gastrointestinal Bleeding: How, Why and When?
Graca BM et al.
RadioGraphics 2010; 30: 235-252
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