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Factor i

(Science: haematology) a protein which is synthesised by the liver.

fibrinogen is converted to fibrin, in the formation of a blood clot, via the enzymatic action of thrombin. A fibrinogen assay measures the concentration of fibrinogen in the blood and may be used to evaluate abnormal blood clotting.

a lack of fibrinogen may be congenital or acquired. A condition known as DIC results in the excessive utilisation and depletion of fibrinogen.

Synonym: fibrinogen.