About The Test
Red blood cells (RBC) are made in the bone marrow and contain hemoglobin, a protein that carries oxygen to the tissues in the body. These cells are also known as erythrocytes.
Red blood cell count is a blood test that measures your levels of erythrocytes. This test is most often done as part of a complete blood count (CBC) that also measures other types of blood cells.
RBC count can help diagnose anemia and other conditions that affect red blood cells. If RBC count results are abnormal, additional tests are usually done to diagnose the cause of the high or low level of red blood cells.
Purpose of the test
The purpose of the RBC count is to find out if the number of red blood cells you have is normal or abnormal. RBC count may be included in routine blood testing during a check-up, usually as part of a complete blood count (CBC) measuring the number of red blood cells, white blood cells (WBCs), and hemoglobin in a blood sample.
Measuring RBCs can help diagnose anemia, a condition in which the body doesn’t have enough healthy red blood cells. There are different types of anemia with distinct causes. A low RBC count is a key indicator of anemia, and additional tests can help determine its underlying cause.
RBC count may also be used to help diagnose other conditions that affect red blood cells, such as kidney problems, a type of white blood cell cancer, or problems with the bone marrow
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