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Definition
An RBC nuclear scan is a group of tests using small amounts of radioactive material to mark (tag) red blood cells (RBCs). The body is then scanned to detect the location and flow of the tagged RBCs (see also nuclear ventriculography).How the test is performed
The exact procedure may vary slightly depending on the reason for the scan (the suspected problem).How to prepare for the test
You must sign a consent form. You will wear a hospital gown, and be asked to remove jewelry or metallic objects before the scan.How the test will feel
There will be a sharp prick from the needles used for blood withdrawal and/or injection(s). You will not feel the radioisotope and the imaging, but the table may be cold or hard. You must lie still during the scan.Why the test is performed
Most often it is used to evaluate blood-flow patterns (nuclear ventriculography), or to locate the site of gastrointestinal bleeding. It may also be used to look for hemangioma within the liver. Occasionally, it is used to evaluate the rate of blood loss in some anemias, or to evaluate blood vessel obstructions.Normal Values
A normal value indicates no RBCs in unusual areas (no sites of bleeding), and normal blood-flow patterns.What abnormal results mean
The radiologist and the attending physician will determine abnormalities based on the scan findings. This scan is most commonly used to determine the site of bleeding, particularly bleeding within the gastrointestinal tract. An RBC scanning is also used as part of nuclear ventriculography and other scans.What the risks are
Risks are essentially the same as for X-rays (radiation) and intravenous injection or blood sampling.Special considerations
Scans may need to be repeated over 1 or 2 days to detect gastrointestinal bleeding. Update Date: 10/17/2003 Updated by: Jeffrey Brown, M.D., Mallinckrodt Institute of Radiology, Washington University School of Medicine, St. Louis, MO. Review provided by VeriMed Healthcare Network.
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Page last updated: 28 October 2004 |