A nurse is caring for a patient who has been prescribed a stool guaiac test.

The patient inquires about the purpose of the test.

How should the nurse respond?

Choice A rationale:

The stool guaiac test does not check for bacteria in the feces. This test is used to detect hidden (occult) blood in a stool sample. It is the most common type of fecal occult blood test (FOBT)1.

Choice B rationale:

The stool guaiac test does not check for fat in the feces. The presence of fat in the feces is usually checked by a different test called a fecal fat test. The stool guaiac test is specifically designed to detect the presence of hidden blood in the stool.

Choice C rationale:

The stool guaiac test does not check for parasites in the feces. Parasites are typically detected using a stool ova and parasites (O&P) test. The stool guaiac test is used to detect hidden blood in the stool, which could be an indication of various conditions, including colon cancer or polyps in the colon or rectum.

Choice D rationale:

The stool guaiac test checks for hidden blood in the feces. This is the correct answer. The test can find blood even if you cannot see it yourself. Occult blood in the stool may indicate colon cancer or polyps in the colon or rectum, though not all cancers or polyps bleed. If blood is detected through a fecal occult blood test, additional tests may be needed to determine the source of the bleeding. The stool guaiac test can only detect the presence or absence of blood — it can’t determine what’s causing the bleeding.

Choice A rationale:

Administering insulin to a client who is hyperventilating due to respiratory alkalosis would not be the appropriate action. Insulin is used to lower blood glucose levels in clients with hyperglycemia, such as those with diabetes mellitus. It does not directly address the issues of hyperventilation or respiratory alkalosis.

Choice B rationale:

Having the client breathe into a paper bag is the correct action in this case. When a person hyperventilates, they exhale more carbon dioxide (CO2) than they produce. This can lead to a state of respiratory alkalosis, where the blood becomes too alkaline due to the low levels of CO2. By breathing into a paper bag, the client re-inhales some of the exhaled CO2, helping to restore the balance of gases in the blood and alleviate the symptoms of respiratory alkalosis.

Choice C rationale:

Administering sodium bicarbonate to a client who is hyperventilating and has respiratory alkalosis would not be the appropriate action. Sodium bicarbonate is an alkalinizing agent used to treat conditions where there is too much acid in the body, such as metabolic acidosis. In this case, the client’s body is too alkaline due to the respiratory alkalosis, so administering an alkalinizing agent would exacerbate the condition.

Choice D rationale:

Having the client place their head between their knees would not be the appropriate action for a client who is hyperventilating due to respiratory alkalosis. This position is often used to help alleviate symptoms of dizziness or fainting, but it does not address the underlying issue of the imbalance of gases in the blood due to hyperventilation.