plasma thromboplastin antecedent


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Related to plasma thromboplastin antecedent: plasma thromboplastin component, Factor xia

antecedent

 [an″te-se´dent]
a precursor.
plasma thromboplastin antecedent (PTA) factor XI, one of the coagulation factors.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

fac·tor XI

in the clotting of blood, also known as plasma thromboplastin antecedent, a component of the contact system that is absorbed from plasma and serum by glass and similar surfaces. Its active form, factor XIa (EC 3.4.21.27), is a serine proteinase converting factor IX to factor IXa. Deficiency of factor XI results in a hemorrhagic tendency; is caused by an autosomal recessive gene.
Farlex Partner Medical Dictionary © Farlex 2012

fac·tor XI

(fak'tŏr)
A plasma coagulation factor; a component of the contact system that is absorbed from plasma and serum by glass and similar surfaces. Deficiency of factor XI results in a hemorrhagic tendency.
Synonym(s): plasma thromboplastin antecedent.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

fac·tor XI

(fak'tŏr)
In blood clotting, a component of the contact system that is absorbed from plasma and serum by glass and similar surfaces.
Medical Dictionary for the Dental Professions © Farlex 2012
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