3 doctors weighed in:

What is the principle behind the occult blood test?

3 doctors weighed in
Dr. Charles Cattano
Internal Medicine - Gastroenterology
1 doctor agrees

In brief: FIT or hemoccult?

If you're using the old hemoccult slide, you'll notice its two-sided.
Place your specimen on one side, close the lid. Doctor or lab, when developing your specimen, turns the card over, opens the back & applies the developer solution which soaks thru to your specimen. A color change indicates your specimen contains invisible blood. Principle & mechanics differ with FIT (fecal immunochemical test).

In brief: FIT or hemoccult?

If you're using the old hemoccult slide, you'll notice its two-sided.
Place your specimen on one side, close the lid. Doctor or lab, when developing your specimen, turns the card over, opens the back & applies the developer solution which soaks thru to your specimen. A color change indicates your specimen contains invisible blood. Principle & mechanics differ with FIT (fecal immunochemical test).
Dr. Charles Cattano
Dr. Charles Cattano
Thank
Dr. Gurmukh Singh
Pathology

In brief: More than one

Guaiac test measures peroxidase activity which is associated with blood from any site in the GI tract, including blood in meats, and peroxidase in horse raddish.
A different test measure human globin part of hemoglobin and detects only blood originating in the large intestine.

In brief: More than one

Guaiac test measures peroxidase activity which is associated with blood from any site in the GI tract, including blood in meats, and peroxidase in horse raddish.
A different test measure human globin part of hemoglobin and detects only blood originating in the large intestine.
Dr. Gurmukh Singh
Dr. Gurmukh Singh
Thank
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