Why you cant donate blood with elevated red cells?

There are a few reasons why you cannot donate blood with elevated red cells.

Increased risk of blood clots. When you have elevated red cell levels, your blood becomes thicker and more viscous. This can increase your risk of developing blood clots, which can lead to serious health problems such as stroke, heart attack, and deep vein thrombosis (DVT).

Impaired blood flow. Elevated red cell levels can also impair blood flow, which can lead to tissue damage and organ failure. This is because red blood cells carry oxygen to tissues and organs throughout the body. When there are too many red blood cells, they can block small blood vessels and prevent oxygen from reaching these areas.

False positive test results. Elevated red cell levels can also interfere with blood tests, leading to false positive results. This is because some blood tests measure the concentration of red blood cells in a blood sample. When there are too many red blood cells, these tests can give inaccurate results.

For these reasons, you are not allowed to donate blood if your red cell levels are elevated.