Hemoccult test

With the hämoccult test, tiny amounts of blood can be detected in the stool - a possible indication of colorectal cancer. Read more about it!

Hemoccult test

With a Hemoccult test (Guaiac test) can even trace tiny amounts of blood in the stool. Since these quantities are so small that they are invisible to the naked eye, they are also called occult blood (hidden blood). Learn all about the Hämoccult test: how it works, how it works and when it's used.

Product Overview

Hemoccult test

  • What is a Hemoccult test?

  • When do you perform a hemoccult test?

  • What do you do in a Hämoccult test?

  • What are the risks of having a Hemoccult test?

  • What do I have to consider after a Hämoccult test?

What is a Hemoccult test?

The doctor can detect tiny traces of blood in the stool with the Hämoccult test (also called guaiac test). The test is a cheap, simple and harmless method for the early detection of colorectal cancer or its precursors. The patient can do it himself at home, test materials are available at the family doctor or in the pharmacy. The costs are usually borne by the health insurance companies.

When do you perform a hemoccult test?

The Hämoccult test is used to detect minor intestinal bleeding, as occurs, for example, in colorectal cancer or colon polyps. Bleeding from the esophagus or stomach is not detected. Currently, the Hemoccult test is recommended as a colorectal cancer screening once a year from the age of 50 (a tumor in the colon or rectum in younger years is unlikely). Patients with an increased risk of colorectal cancer, for example in the case of increased colorectal cancer cases in the family, are already entitled to regular hemoccult tests.

For these diseases, the examination is important

  • colon cancer
  • polyps

What do you do in a Hämoccult test?

The test set consists of a spatula and a small letter with a filter paper in the middle. This is soaked with guaiac resin. The patient uses the spatula to take a small sample from his chair and stroke it on the test field. Then he closes the note. He repeats the whole thing for three consecutive days before giving the notes to his doctor. This opens the little notes and drips a developer solution onto the filter paper: If a stool sample contains blood, the red blood pigment reacts with the resin and it discolors bluish.

More about the symptoms

  • Blood in the stool
  • diarrhea
  • constipation

What are the risks of having a Hemoccult test?

The Hämoccult test is a safe and simple diagnostic procedure. There are no complications or after effects. By using the spatula during the sampling and the lockable Briefchen the implementation is also not unhygienic.

What do I have to consider after a Hämoccult test?

If the hemoccult test does not indicate blood in the stool, no further examinations are necessary. If your test result is positive, that's not proof of bowel cancer either! Your doctor will recommend a colonoscopy to find out where the bleeding comes from. The blood may be from hemorrhoids or from menstruation in women. Bleeding intestinal polyps can also make the Hemoccult test positive.

In addition, the Hemoccult test may give false-positive results if, for example, you have eaten raw meat or certain types of vegetables and fruits such as beetroot, radish, radishes, broccoli, bananas or cherries in the three days prior to sampling. A false-negative result delivers the Hemoccult test on the other hand, if you have taken large amounts of vitamin C (in the form of fruit or vitamin C supplements).


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