High red blood cell count

Find a symptom by its first letter

Definition

A high red blood cell count is an increase in oxygen-carrying cells in your bloodstream. Red blood cells transport oxygen from your lungs to tissues throughout your body. A high red blood cell count can result from a condition that limits your oxygen supply or a condition that directly increases red blood cell production.

The definition of a high red blood cell count varies from one medical practice to another. A normal range in adults is generally considered to be 700,000 to 5.2 million red blood cells per microliter (mcL) of blood for men and 500,000 to 4.6 million red blood cells per mcL of blood for women. In children, the threshold for high red blood cell count varies with age and sex.

Causes

High red blood cell count may be caused by low oxygen levels, kidney disease or other problems.

Low oxygen levels

Your body may increase red blood cell production to compensate for any condition that results in low oxygen levels, including:

  • Congenital heart disease in adults
  • Heart failure
  • A condition present at birth that reduces the oxygen-carrying capacity of red blood cells (hemoglobinopathy)
  • High altitudes
  • COPD (chronic obstructive pulmonary disease) and other lung diseases
  • Pulmonary fibrosis
  • Sleep apnea
  • Nicotine dependence (smoking)

Performance-enhancing drugs

Certain drugs stimulate the production of red blood cells, including:

  • Anabolic steroids
  • Blood doping (transfusion)
  • Injections of a protein (erythropoietin) that enhances red blood cell production

Increased red blood cell concentration

  • Dehydration (If the liquid component of the blood (plasma) is decreased, as in dehydration, the red blood cell count increases. This is due to the red blood cells becoming more concentrated. The actual number of red blood cells stays the same.)

Kidney disease

Rarely, in some kidney cancers and sometimes after kidney transplants, the kidneys might produce too much erythropoietin. This enhances red blood cell production.

Bone marrow overproduction

  • Polycythemia vera
  • Other myeloproliferative disorders

thời trang trẻ emWordpress Themes Total Freetư vấn xây nhàthời trang trẻ emshop giày nữdownload wordpress pluginsmẫu biệt thự đẹpepichouseáo sơ mi nữHouse Design Blog - Interior Design and Architecture Inspiration