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If TIBC values are known, the transferrin concentration can be estimated with the following formulas: [2] Transferrin (mg/dL) = 0.8 x TIBC (μg of iron/dL) – 43; Transferrin (mg/dL) = 0.7 x TIBC (μg of iron/dL) To measure TIBC in the blood is less expensive than a direct measurement of transferrin. [4] [5]
Transferrin saturation (TS), measured as a percentage, is a medical laboratory value. It is the value of serum iron divided by the total iron-binding capacity [1] of the available transferrin, the main protein that binds iron in the blood, this value tells a clinician how much serum iron is bound. For instance, a value of 15% means that 15% of ...
Iron tests are groups of clinical chemistry laboratory blood tests that are used to evaluate body iron stores or the iron level in blood serum.. Other terms used for the same tests are iron panel, iron profile, iron indices, iron status or iron studies.
When plasma transferrin levels rise, there is a reciprocal decrease in percent transferrin iron saturation, and a corresponding increase in total iron binding capacity in iron deficient states [22] A decreased plasma transferrin level can occur in iron overload diseases and protein malnutrition.
Serum iron is a medical laboratory test that measures the amount of circulating iron that is bound to transferrin and freely circulate in the blood. Clinicians order this laboratory test when they are concerned about iron deficiency, which can cause anemia and other problems. 65% of the iron in the body is bound up in hemoglobin molecules in red blood cells.
MerckMedicus: total iron-binding capacity (TIBC)a measure of the total amount of iron that can be bound by the transferrin in a serum sample, determined by saturating the transferrin with iron, then removing the unbound iron with an absorbent and measuring the iron in the filtrate; used in the evaluation of patients with iron deficiency or ...
The percentage of iron saturation (or transferrin saturation index or percent) can be measured by dividing the level of serum iron by total iron binding capacity and is a value that can help to confirm the diagnosis of iron-deficiency anemia; however, other conditions must also be considered, including other types of anemia. [18]
Normal total iron-binding capacity for both sexes is 240 to 450 μg/dL. [6] Total iron-binding capacity increases when iron deficiency exists. [4] Serum ferritin levels reflect the iron stores available in the body. [4] The normal range is 20 to 200 nanograms per milliliter (ng/mL) for men and 15 to 150 ng/mL for women. [8]
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