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KEY POINTS
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A fecal occult blood test (FOBT) is a lab test that looks for hidden or invisible (occult) blood in your child’s bowel movements. A FOBT can find tiny amounts of blood that can’t be seen by just looking at your child’s bowel movements.
This test may be done to:
Tell your child’s healthcare provider about any medicines, herbs, or supplements that your child takes. When taking the FOBT test, your child may need to avoid some medicines or foods for several days before you collect the samples. Red meat, cantaloupe, and some raw vegetables, such as turnips, broccoli, cauliflower, radishes, parsnips, and horseradish, may cause false positive test results depending on which test your child’s healthcare provider is using.
Follow any other instructions your child’s healthcare provider gives you.
Your child’s provider will give you a test kit to use at home. Follow the instructions that come with the kit for getting samples of your child’s bowel movements and for returning the cards to a lab. Read all of the instructions that come with the test kit before you start, including how to open the card and where to put the bowel movement sample.
The samples are returned to your child’s provider’s office or sent to the lab and tested. Ask your child’s health care provider how and when you will get your child’s test results.
This test checks for the presence of blood in your child’s bowel movements. It does not measure how much blood. It reports just whether blood is present. If the lab finds blood, your child’s healthcare provider will decide what other tests your child needs to find where the blood came from.
Test results are only one part of a larger picture that takes into account your child’s medical history and current health. Sometimes a test needs to be repeated to check the first result. Talk to your child’s healthcare provider about your child’s results and ask questions such as: