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An anticoagulant, commonly known as a blood thinner, is a chemical substance that prevents or reduces the coagulation of blood, prolonging the clotting time. [1] Some occur naturally in blood-eating animals, such as leeches and mosquitoes, which help keep the bite area unclotted long enough for the animal to obtain blood.
Unlike other hemostat technologies its action does not require the normal hemostatic pathway and therefore continues to function even when anticoagulants like heparin are present. [9] Chitosan is used in some emergency hemostats which are designed to stop traumatic life-threatening bleeding.
The risk of HT increases with the severity and duration of the initial stroke, as well as with certain medical conditions such as high blood pressure, diabetes, and clotting disorders [3] and the use of certain medications, such as anticoagulants and thrombolytic tpA medication (such as alteplase) which can increase the bleeding risk. [4] [5]
The use of adsorbent chemicals, such as zeolites, and other hemostatic agents are also used for sealing severe injuries quickly (such as in traumatic bleeding secondary to gunshot wounds). Thrombin and fibrin glue are used surgically to treat bleeding and to thrombose aneurysms. Hemostatic Powder Spray TC-325 is used to treated gastrointestinal ...
An antithrombotic agent is a drug that reduces the formation of blood clots (). [1] [2] Antithrombotics can be used therapeutically for prevention (primary prevention, secondary prevention) or treatment of a dangerous blood clot (acute thrombus).
A decrease in antiplatelet effect would reduce the risk of bleeding, but increase the thromboembolic risk. [3] Drug toxicity may increase when multiple antiplatelet drugs are used. Gastrointestinal bleeding is a common adverse event seen in many patients. [11]
Clotting time is a general term for the time required for a sample of blood to form a clot, or, in medical terms, coagulate.The term "clotting time" is often used when referring to tests such as the prothrombin time (PT), activated partial thromboplastin time (aPTT or PTT), activated clotting time (ACT), thrombin time (TT), or Reptilase time.
Thrombin time can be prolonged by heparin, fibrin degradation products, and fibrinogen deficiency or abnormality. Thrombin time is not affected by anti-Xa anticoagulants such as rivaroxaban or apixaban, but is very sensitive to direct thrombin inhibitors including dabigatran, argatroban, and bivalirudin. [5]