RBC (nuclear) scan

What the risks are:

Risks are essentially the same as for X-rays (radiation) and intravenous injection or blood sampling.

There is a very slight exposure to radiation from the radioisotope. The radiation is minimal, and the materials "decompose" (become no longer radioactive) in a very short time. Virtually all radioactivity is gone within about 12 hours. There are no documented cases of injury from exposure to radioisotopes. The scanner only detects radiation; it does not emit any radiation.

However, because of the slight radiation exposure, most nuclear scans (including an RBC scan) are not recommended for women who are pregnant or breastfeeding (the radioisotope may be excreted in breast milk).

There is a minor risk that occurs whenever the body is penetrated (such as during blood sampling or injection of materials). This risk mainly involves the chance for infection or bleeding from the site. The risk for an RBC scan is no greater than when blood is sampled or material is injected into a vein for other reasons.

Extremely rarely, a person may experience an allergic reaction to the radioisotope. This may include anaphylaxis if the person is extremely sensitive to the substance.

Special considerations:

Scans may need to be repeated over 1 or 2 days to detect gastrointestinal bleeding.