Hospitals & Services
To detect sites of active GI bleeding prior to angiography and/or surgery.
The patient's red blood cells are labelled with a radiotracer. Sites of active bleeding can be identified on serial views of the abdomen and pelvis.
No preparation required. The study should be performed while the patient is actively bleeding.Images are acquired for approximately 1 hour and then at intervals up to 24 hours after injection, or until bleeding is detected.
Although the test is sensitive and can detect intermittent bleeding, it may not always localise the exact anatomical site. SPECT/CT can be used to provide anatomical localisation when bleeding is detected.