American Medical Technologist (AMT) Practice Exam

Question: 1 / 400

The guaiac card occult blood test is commonly performed on which type of sample?

Urine

Blood

Stool

The guaiac card occult blood test is specifically designed to detect the presence of hidden (occult) blood in stool samples. This test is often utilized in screening for gastrointestinal issues, such as colorectal cancer or gastrointestinal bleeding. The guaiac chemical reacts with hemoglobin in the presence of blood, changing color and indicating a positive result.

Stool is the primary specimen type for this test because it allows for the assessment of blood that may not be visible to the naked eye. The other sample types listed—urine, blood, and sputum—are not suitable for this particular test, as they involve different physiological processes and would require different methods or tests to assess for blood or other related conditions. Thus, the stool sample is firmly established as the correct choice for the guaiac card occult blood test.

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Sputum

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