CPB (Color index of blood).

CPB (Color index of blood) - represents the ratio of the amount of hemoglobin to the number of red cells in a given volume of blood and that is a measure of the normality of the hemoglobin content of the individual cells.

Abnormalities. Disorders or diseases caused or related.

In the most cases of anemia, CPB is lower than 1, except pernicious anemia when it is higher than 1.

If the color index of blood is lower than normal, it may indicate:

·        anemia of lead poisoning;

·        iron deficiency anemia;

·        anemia during pregnancy.

If the color index of blood is higher than normal (more than 1.1), it may indicate:

·        polyposis of the stomach;

·        folic acid deficiency;

·        deficiency of vitamin B12;

·        cancer.

If the CPB remained within normal range, and the levels of red blood cells (erythrocytes) and haemoglobin are low, normochromic anemia is suspected.

There are some types of normochromic anemia. When there is the abnormally rapid destruction of red blood cells, we can speak about hemolytic anemia. When the bone marrow produces too few red blood cells we can talk about aplastic anemia.