A number of gastrointestinal investigations apart from endoscopy may be very helpful in establishing a diagnosis and in deciding the best treatment. These include:

Mesenteric angiography and embolisation

Mesenteric angiography is a more invasive method of looking at the blood vessels supplying the gut when obscure GI bleeding is suspected. It involves placing a thin catheter into the artery in the groin using local anaesthetic. The catheter is then passed into specific blood vessels and contrast is injected to outline the vessels to identify which vessel may be bleeding. Embolisation can then be carried out by injecting tiny coils or spheres through the catheter to block the bleeding vessel.

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