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Hemostasis: Difference between revisions
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== Steps of Hemostasis == | == Steps of Hemostasis == | ||
[[File:Hemostasis Process.jpg|left|thumb|250px|It shows the process of hemostasis]] | [[File:Hemostasis Process.jpg|left|thumb|250px|It shows the process of hemostasis]] | ||
Hemostasis is composed of three major processes in a set order. '''Vascular constriction''' is the first step of hemostasis. It stops the blood flow to the area that is injured. When a person gets injured, Vascular constriction occurs to prevent excessive bleeding. After vascular constriction, thrombin activates platelets and they aggregate at the site of the injury, and loose platelet | Hemostasis is composed of three major processes in a set order. '''Vascular constriction''' is the first step of hemostasis. It stops the blood flow to the area that is injured. When a person gets injured, Vascular constriction occurs to prevent excessive bleeding. After vascular constriction, thrombin activates platelets and they aggregate at the site of the injury, and loose platelet fibrinogen. After thrombin activates platelets, the clot forms and entraps the plug. '''White thrombus''' is present when the plug contains only platelets; a '''red thrombus''' is present when red blood cells are present. Finally, the process proceed the last step, [[tissue repair]]. the clot is dissolved in normal blood flow. The clot is dissolved through the action of plasmin. <ref>[http://themedicalbiochemistrypage.org/blood-coagulation.html The Medical Biochemistry] Michael W. King, Ph.D, IU School of Medicine, February 24, 2011.</ref> | ||
When a person's blood vessels are damaged, hemostasis begins its three steps to arrest bleeding. The three steps are a '''vascular constriction''', a '''platelet plug''', and a '''coagulation'''. The explanation of a vascular spasm and a platelet plug is followed. However, the explanation of coagulation will be located on the next section. | When a person's blood vessels are damaged, hemostasis begins its three steps to arrest bleeding. The three steps are a '''vascular constriction''', a '''platelet plug''', and a '''coagulation'''. The explanation of a vascular spasm and a platelet plug is followed. However, the explanation of coagulation will be located on the next section. | ||
