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Fecal occult blood tests

Fecal occult blood tests is a topic covered in the Guide to Diagnostic Tests.

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Test/Range/Collection

Fecal occult blood tests (FOBT), stool

Negative

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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.

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Citation

McPhee, Stephen J., et al. "Fecal Occult Blood Tests." Guide to Diagnostic Tests, 7th ed., McGraw-Hill Education, 2017. Emergency Central, emergency.unboundmedicine.com/emergency/view/GDT/619141/all/Fecal_occult_blood_tests.
McPhee SJ, Lu CM, Nicoll D. Fecal occult blood tests. Guide to Diagnostic Tests. 7th ed. McGraw-Hill Education; 2017. https://emergency.unboundmedicine.com/emergency/view/GDT/619141/all/Fecal_occult_blood_tests. Accessed April 26, 2019.
McPhee, S. J., Lu, C. M., & Nicoll, D. (2017). Fecal occult blood tests. In Guide to Diagnostic Tests. Available from https://emergency.unboundmedicine.com/emergency/view/GDT/619141/all/Fecal_occult_blood_tests
McPhee SJ, Lu CM, Nicoll D. Fecal Occult Blood Tests [Internet]. In: Guide to Diagnostic Tests. McGraw-Hill Education; 2017. [cited 2019 April 26]. Available from: https://emergency.unboundmedicine.com/emergency/view/GDT/619141/all/Fecal_occult_blood_tests.
* Article titles in AMA citation format should be in sentence-case
TY - ELEC T1 - Fecal occult blood tests ID - 619141 A1 - McPhee,Stephen J, AU - Lu,Chuanyi Mark, AU - Nicoll,Diana, BT - Guide to Diagnostic Tests UR - https://emergency.unboundmedicine.com/emergency/view/GDT/619141/all/Fecal_occult_blood_tests PB - McGraw-Hill Education ET - 7 DB - Emergency Central DP - Unbound Medicine ER -