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prothrombin time

 

Definition: the time required for clotting after thromboplastin and calcium are added in optimal amounts to blood of normal fibrinogen content; if prothrombin is diminished, the clotting time increases; used to evaluate the extrinsic clotting system.

See Also: prothrombin test

Further information

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© Copyright 2018 Wolters Kluwer. All Rights Reserved. Review date: Sep 19, 2016.

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