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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:
Beta-thalassemia (β-thalassemia) is an autosomal dominant blood condition that results in the reduction of hemoglobin production. The cause for the disorder is related to a genetic mutation of the HBB gene. This gene is responsible for providing the instructions to produce beta-globin; one of the major components of hemoglobin.
Anemia or anaemia (British English) is a blood disorder in which the blood has a reduced ability to carry oxygen.This can be due to a lower than normal number of red blood cells, a reduction in the amount of hemoglobin available for oxygen transport, or abnormalities in hemoglobin that impair its function.
Methemoglobinemia can be due to certain medications, chemicals, or food or it can be inherited. [2] Substances involved may include benzocaine , nitrites , or dapsone . [ 3 ] The underlying mechanism involves some of the iron in hemoglobin being converted from the ferrous [Fe 2+ ] to the ferric [Fe 3+ ] form. [ 3 ]
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]
It can be congenital or caused by medications, food additives or toxins, including chloroquine, benzene, nitrites, benzocaine. [7] Histotoxic hypoxia (Dysoxia) [8] or Cellular hypoxia occurs when the cells of the affected tissues are unable to use oxygen provided by normally oxygenated hemoglobin. [7]
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Iron-deficiency anemia is anemia caused by a lack of iron. [3] Anemia is defined as a decrease in the number of red blood cells or the amount of hemoglobin in the blood. [3] When onset is slow, symptoms are often vague such as feeling tired, weak, short of breath, or having decreased ability to exercise. [1]