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D-dimer (or D dimer) is a dimer that is a fibrin degradation product (FDP), a small protein fragment present in the blood after a blood clot is degraded by fibrinolysis. It is so named because it contains two D fragments of the fibrin protein joined by a cross-link , hence forming a protein dimer .
The reference range for prothrombin time depends on the analytical method used, but is usually around 12–13 seconds (results should always be interpreted using the reference range from the laboratory that performed the test), and the INR in absence of anticoagulation therapy is 0.8–1.2.
Principles of D-dimer testing. Fibrin degradation products (FDPs), also known as fibrin split products, are components of the blood produced by clot degeneration. [1] Clotting, also called coagulation, at the wound site produces a mass of fibrin threads called a net that remains in place until the cut is healed. As a cut heals, the clotting ...
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This test is repeated with pooled plasma from normal patients. The difference in time between the test and the 'normal' indicates an abnormality in the conversion of fibrinogen (a soluble protein) to fibrin, an insoluble protein. [2] The thrombin time compares the rate of clot formation to that of a sample of normal pooled plasma.
The unit conversions of substance concentrations from the molar to the mass concentration scale above are made as follows: ... Free thyroxine ... D-dimer n/a: 500 ...
He had no living family. He was not famous. He lived alone. Yet on Tuesday, hundreds of people gathered at the graveside of World War II veteran Stephen Kolesnik Jr. and watched him laid to rest.
Findings may include low platelets, low fibrinogen, high INR, or high D-dimer. [2] Treatment is mainly directed towards the underlying condition. [2] [3] Other measures may include giving platelets, cryoprecipitate, or fresh frozen plasma. [2] Evidence to support these treatments, however, is poor. [2] Heparin may be useful in the slowly ...