GI Endoscopy · 7 min read
Small-Bowel Capsule: First-Line After Negative Bidirectional Endoscopy
ACG 2015 renamed obscure GI bleeding as suspected small-bowel bleeding. Capsule looks. Device-assisted enteroscopy treats.
Clinical Bottom Line
| Question | Practical answer |
|---|---|
| When is a small-bowel capsule the next test? | GI bleeding or iron-deficiency anemia after a negative EGD and colonoscopy, patient stable, no obstruction. ESGE 2022 and ACG 2015. |
| How soon after overt bleeding? | As soon as possible. ESGE 2022: ideally within 48 hours. Yield falls as the days pass. |
| Do I repeat EGD first? | Second-look is reasonable when the first look was rushed or the patient was hypotensive. It is not a required ritual before every capsule (ESGE 2022). |
| What treats the finding? | Device-assisted enteroscopy. Oral route if the lesion is in the first 60% of small-bowel transit, anal if later. Capsule cannot biopsy or clip. |
| When not to swallow a camera? | Known or suspected stricture without a patency study. Unstable bleed belongs in angiography, not in a waiting room with a recorder belt. Retention page. |
What words should I use?
ACG 2015 dropped "obscure GI bleeding" as the name for this presentation. Call it suspected small-bowel bleeding: blood or iron deficiency, EGD and colonoscopy already negative, source still thought to sit between the papilla and the ileocecal valve. Save "obscure" for the smaller group that is still unexplained after capsule and dedicated small-bowel imaging.
ESGE 2022 keeps capsule as first-line over push enteroscopy, over small-bowel follow-through, and over jumping straight to angiography in a stable patient. CT enterography is complementary when you worry about a mass or a stricture, not a replacement for mucosal views.
What does a positive or negative study mean?
A P2 lesion (angioectasia, ulcer, tumor, varix) is a reason to plan enteroscopy, not a reason to watch hemoglobin for another month. Reading rules: interpretation page.
A high-quality negative capsule in a patient who has stopped bleeding can be watched (ESGE 2022). Ongoing transfusion or recurrent overt bleeding is a reason to look again, including a second look at the stomach and colon. Capsule is not a lifetime clearance.
Selected references
- Pennazio M, et al. Small-bowel capsule endoscopy and device-assisted enteroscopy. ESGE Guideline Update 2022. Endoscopy. 2023;55:58-95.
- Gerson LB, Fidler JL, Cave DR, Leighton JA. ACG clinical guideline: diagnosis and management of small bowel bleeding. Am J Gastroenterol. 2015;110:1265-1287.
Last reviewed September 20, 2026. Written for clinicians who finished a negative EGD and colonoscopy and now have to decide whether the next test is a capsule, a CT, or another look.
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