Fecal occult blood tests
To view the entire topic, please log in or purchase a subscription.
Emergency Central is a collection of disease, drug, and test information including 5-Minute Emergency Medicine Consult, Davis’s Drug, McGraw-Hill Medical’s Diagnosaurus®, Pocket Guide to Diagnostic Tests, and MEDLINE Journals created for emergency medicine professionals. Explore these free sample topics:
-- The first section of this topic is shown below --
Test/Range/Collection
Fecal occult blood tests (FOBT), stool
Negative
$
Dietary (meat, fish, turnips, horseradish) and medication (aspirin, nonsteroidal anti-inflammatory drugs) restrictions are often recommended to reduce false positive results, but available evidence does not suggest large effect on positivity rates in non-rehydrated testing.
To avoid false-negatives, patients should avoid taking vitamin C.
Patient collects two specimens from three consecutive bowel movements.
-- To view the remaining sections of this topic, please log in or purchase a subscription --
Test/Range/Collection
Fecal occult blood tests (FOBT), stool
Negative
$
Dietary (meat, fish, turnips, horseradish) and medication (aspirin, nonsteroidal anti-inflammatory drugs) restrictions are often recommended to reduce false positive results, but available evidence does not suggest large effect on positivity rates in non-rehydrated testing.
To avoid false-negatives, patients should avoid taking vitamin C.
Patient collects two specimens from three consecutive bowel movements.
There's more to see -- the rest of this entry is available only to subscribers.