Blood in fecal masses can be a symptom of oncological diseases of the intestines.
When conducting a test on hidden blood in the feces, the stool is examined for the presence of microscopic or hidden blood particles. The hidden blood in the feces may be a sign of such problems of the digestive system as a tumor, polyp, colon cancer.
If hidden blood has been detected, the doctor should determine the source of the bleeding to diagnose and prescribe the appropriate course of treatment.
Causes of blood in the stool
Blood may appear in the chair in the presence of one or more diseases:
- Benign (non-cancerous) or malignant (cancerous) tumors in the colon;
- Hemorrhoids (dilated veins of the lower part of the rectum, which can break apart and cause bleeding);
- Anal fissures (cracks in the lining of the anal canal);
- Intestinal infections causing inflammation;
- Nonspecific ulcerative colitis;
- Crohn's disease;
- Diverticulosis caused by protrusion of the wall of the rectum;
- Anomalies of blood vessels in the colon.
Gastrointestinal bleeding may be microscopic (hidden blood) or easily manifested in the form of ordinary blood or black stomach styrofoam, also called malted.
Collect feces on hidden blood
To test the hidden blood, you must collect three samples of feces. Samples should be taken every other day, since the large intestine affected by cancer, bleeding from time to time, but not constantly.
Samples of the chair are collected in a clean container and either evaluate the result of the color changes on the test card, or are taken to the laboratory. In a laboratory, a specialist examines samples using a microscope or chemical analysis.
Preparing for a test for hidden blood in feces
The results of the test for hidden blood depend on the preparation for it, it is important to carefully follow certain instructions.
You can not do a test if present:
- Hemorrhoidal attack;
Some foods may affect the test results, so for 48-72 hours they are advised to adhere to a special diet. You can not eat the following products:
- Broccoli cabbage;
- Cantaloupe (a kind of melon);
- Radish, radish;
- Red meat (especially with blood);
- Turnip, brook;
- Drinks and foods rich in vitamin C.
Also, within 48 hours prior to the test, the administration of certain medicines should be canceled (at the direction of the physician).
Frequency of passage of test for hidden blood
For the early detection and prevention of colorectal cancer, it is recommended that, every 50 years, a blood test be performed. Along with this, every 5 years is shown holding Sigmoidoscopy for checking colorectal polyps or cancer.
Blood test results
Since a small amount of blood is often present in the chair, the tests for hidden blood are designed to determine the amount of blood that exceeds the norm.
A positive test result on the hidden blood means that blood was found in the chair. The doctor should determine the source of bleeding (for example, the stomach or small intestine). This can be clarified using a colonoscopy.
A negative test result on hidden blood means that blood in this stool sample has not been found. However, you should consult with your doctor about the regularity of the follow-up analyzes.