What is relative polycythemia?
Besides, what is the difference between absolute and relative polycythemia?
In relative polycythemia, the RBC count is not truly increased, but the PCV is elevated because there is less fluid (plasma) in the blood, which makes the relative amount of RBCs appear to be high. Absolute polycythemia occurs when more RBCs are produced than normal and their count is truly elevated.
Also to know, what is secondary polycythemia?
Secondary polycythemia is defined as an absolute increase in red blood cell mass that is caused by enhanced stimulation of red blood cell production. In contrast, polycythemia vera is characterized by bone marrow with an inherent increased proliferative activity.
There are two main types of polycythemia: primary and secondary. The first is usually caused by a genetic mutation, whereas the latter is caused by an underlying condition that either prevents oxygen delivery to tissues (for example, a lung or heart condition), or a tumor that affects secretion of erythropoietin.