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Polycythemia is defined as serum hematocrit (Hct) or hemoglobin (HgB) exceeding normal ranges expected for age and sex, typically Hct >49% in healthy adult men and >48% in women, or HgB >16.5 g/dL in men or >16.0 g/dL in women. [8] The definition is different for neonates and varies by age in children. [9] [10]
Generally at both sea levels and high altitudes, hematocrit levels rise as children mature. [22] These health-related causes and impacts of elevated hematocrit levels have been reported: Fall in blood plasma levels [5] Dehydration [3] Administering of testosterone supplement therapy [23] [24]
The first is a very high red blood cell count, which is usually identified by elevated levels of hemoglobin or hematocrit; A bone marrow biopsy that shows hypercellularity and abnormalities in megakaryocytes; and; The presence of a mutation in the Janus kinase 2 (JAK2) gene.
[1] [35] Andeans possess a similar suite of adaptations but exhibit elevated hemoglobin concentration and a normal resting ventilation. [36] These adaptations may reflect the longer history of high altitude habitation in these regions. [37] [38] A lower mortality rate from cardiovascular disease is observed for residents at higher altitudes. [39]
A hemoglobin test measures the amount of hemoglobin in your blood. If a hemoglobin tests shows that a person's levels are below normal, it means they have a low red blood cell count, which is known as anemia. If the test shows higher levels than normal, it means they have hemoglobinemia. [citation needed] The normal range for hemoglobin is:
A complete blood count (CBC), also known as a full blood count (FBC), is a set of medical laboratory tests that provide information about the cells in a person's blood.The CBC indicates the counts of white blood cells, red blood cells and platelets, the concentration of hemoglobin, and the hematocrit (the volume percentage of red blood cells).
Hct: hematocrit: HCT: hematocrit hematopoietic cell transplantation HCRP: Hospital Cornea Retrieval Programme HCTZ: hydrochlorothiazide: HCV: hepatitis C virus: HD: Hodgkin disease Hemodialysis Huntington's disease: HDL: high-density lipoprotein: HDL-C: high-density lipoprotein-cholesterol HDN: hemolytic disease of the newborn: HDS ...
Normal levels range from 2.1-3.2%, but in the beta-thalassemia disorder, the levels increase to 3.5-6.0%. Additionally, individuals with beta-thalassemia exhibit a high red cell count and low hemoglobin levels. [3] Individuals that express lower levels of hemoglobin A2, have the a 0-thalassemia trait or homozygous gene for a +-thalassemia. [2]