A guaiac test is ordered for a patient. Which type of blood is the nurse checking for in this patient's stool?
a. Bright red blood
b. Dark black blood
c. Microscopic
d. Mucoid
ANS: C
Fecal occult blood tests are used to test for blood that may be present in stool but cannot be seen by the naked eye (microscopic). This is usually indicative of a gastrointestinal bleed. All other options are incorrect. Detecting bright red blood, dark black blood, and blood that contains mucus (mucoid) is not the purpose of a guaiac test.
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