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Hemostasis refers to a process whereby bleeding is halted in most animals with a closed circulatory system. See also Coagulation.
Hemostasis in physiology
Hemostasis can refer to the physiologic process whereby bleeding is halted. Stopped bleeding is commonly referred to, however, as coagulation but coagulation is only one type of hemostatic process
When a blood vessel is wounded, several steps occur to staunch the flow of blood, namely:
Disorders of hemostasis can be roughly divided into platelet disorders, such as idiopathic thrombocytopenic purpura and disorders of coagulation, such as hemophilia
Hemostasis may also refer to the complex interaction between vessels, platelets, coagulation factors, coagulation inhibitors and fibrinolytic proteins to maintain the blood within the vascular compartment in a fluid state. The objective of the hemostatic system is to preserve intravascular integrity by achieving a balance between hemorrhage and thrombosis.
Hemostasis can be induced by adenosine diphosphate (ADP) at the site of a mosquito bite to recruit platelets and oppose bloodfeeding; however mosquitoes have developed salivary apyrase to degrade ADP to counter this defense. emz.
Hemostasis by hemostatic clamps
Hemostasis may refer to the process of manually clamping a blood vessel, usually with hemostatic clamps, in surgery or dissection, to prevent bleeding from that vessel. This also may be done when an abnormal blood vessel forms, as these vessels may have thin walls and be prone to rupturing.
|This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Hemostasis". A list of authors is available in Wikipedia.|