Does iron cause positive Hemoccult?
Oral iron should not cause a positive guaiac reaction, and the HemoQuant results show no increase in occult blood loss in subjects on oral iron therapy.
Does iron cause false positive FOBT?
In vitro testing confirmed that ferrous compounds caused a false-positive Hemoccult slide reaction. Previous studies of the effect of medicinal iron on occult blood tests are reviewed.
Does iron interfere with FOBT?
Iron will not affect FOBT results in vivo. Ascorbic acid might inhibit positive FOBT results both in vitro and in vivo, but it has not been studied in screening populations.
What can cause a false positive Hemoccult?
VI. Causes: False Positive Guaiac tests (Hemoccult)
- Common Causes. Red meat. Cantaloupe and other melon. Grapefruit. Figs. Broccoli. Turnips. Radishes. Horseradish. Cauliflower.
- Uncommon causes of False Positive FOBT. Cucumber. Carrot. Cabbage. Potato. Pumpkin. Zucchini. Parsley.
What can cause a false positive fit test?
A false positive test would occur when the test was positive but you do not have any signs of polyps or cancer. This happens approximately 25% of the time. This can be the result of other issues (such as inflammation or hemorrhoids) causing blood to be present in the stool.
What does guaiac positive mean?
For the FOBT, a positive test result indicates that abnormal bleeding is occurring somewhere in the digestive tract.
What does a Hemoccult test for?
A fecal occult blood test checks stool samples for traces of blood that cannot be seen with the naked eye. This test is also called a stool guaiac or Hemoccult test. It is a simple chemical test of a stool sample that involves about five minutes of preparation time.
What can cause positive fit test?
Abnormal or Positive Results An abnormal or positive FIT result means that there was blood in your stool at the time of the test. A colon polyp, a pre-cancerous polyp, or cancer can cause a positive stool test. With a positive test, there is a small chance that you have early-stage colorectal cancer.
What is the difference between Hemoccult and Hemoccult Sensa?
Q: What is the difference between Hemoccult and Hemoccult SENSA? A: Hemoccult SENSA is more sensitive. Q: May I test alternate samples (gastric fluid, breast secretions, etc.)