[Significance of platelet function tests]

Z Wolf1, H Mani, E Lindhoff-Last

  • 1Medizinische Klinik III, Schwerpunkt Angiologie und Hämostaseologie, Klinikum der Johann Wolfgang Goethe-Universität, Theodor-Stern-Kai 7, 60590, Frankfurt am Main, Deutschland. Zsuzsanna.Wolf@kgu.de

Der Internist
|August 12, 2010
PubMed

Numerous laboratory tests are in use to detect congenital or acquired platelet function disorders. Platelet aggregometry, using ADP, collagen, arachidonic acid or ristocetin as inductor is the standard test system for diagnosis. It is also used to detect platelet non-response to antiplatelet therapy. Studies have demonstrated that laboratory assessment of platelet non response to aspirin or clopidogrel is associated with adverse outcomes, and they indicate the importance of adjusting antiplatelet therapy in patients with a low degree of platelet inhibition. Nevertheless, a standardized method for identifying these patients is still missing.

Related Concept Videos

Structure and Function of Platelets01:18

Structure and Function of Platelets

The cell fragments known as platelets are disc-shaped, with an average diameter of about 3 μm and a thickness of roughly 1 μm. They play a crucial role in the body's vascular clotting system, which also involves plasma proteins, blood cells, and blood vessel tissues.
Platelets are continually replenished, circulating in the bloodstream for 9-12 days before being removed by phagocytes, primarily in the spleen. A microliter of circulating blood contains between 150,000 and 450,000 platelets, with...
Formation of the Platelet Plug01:22

Formation of the Platelet Plug

The platelet phase, the second stage of hemostasis, commences around 15-20 seconds after an injury. It follows and overlaps with the vascular phase, during which blood vessels constrict to minimize blood loss.
As the injured blood vessel contracts, endothelial cells undergo contraction, revealing collagen fibers in the basement membrane and underlying connective tissue. Furthermore, the plasma membrane of endothelial cells becomes adhesive, preparing the site for platelet adhesion. Platelets...
Antiplatelet Drugs: Prostaglandin Synthesis, P2Y12 and Glycoprotein IIb/IIIa Inhibitors01:20

Antiplatelet Drugs: Prostaglandin Synthesis, P2Y12 and Glycoprotein IIb/IIIa Inhibitors

Antiplatelet drugs emerge as frontline defenders against the insidious threat of thromboembolic diseases, where abnormal clots obstruct vital blood vessels. These drugs stand as bulwarks, inhibiting platelet aggregation and clot formation, thereby mitigating the risk of life-threatening conditions like myocardial infarction, coronary artery disease, and thrombotic strokes.
Prostaglandin synthesis inhibitors, exemplified by the widely known aspirin, wield their power by irreversibly acetylating...