Question

The Ambulatory care nurse is performing a guaiac fecal occult blood test (gFOBT), which of the following would indicate a positive result?

1) Green reaction
2) Red reaction
3) Blue reaction
4) Yellow reaction

Answer 1

A positive result for a guaiac fecal occult blood test (gFOBT) is shown by a blue reaction, characterized by moderate-to-large sized dark clumps against a blue-green background on the test card.

Step-by-step explanation:

When an ambulatory care nurse is performing a guaiac fecal occult blood test (gFOBT), a positive result is indicated by a blue reaction. Specifically, the presence of moderate-to-large sized dark clumps against a blue-green background, distributed uniformly over the surface of the test circle, signifies a positive test for occult blood in the stool. This result suggests that there may be bleeding within the gastrointestinal tract that requires further medical evaluation.