serum prothrombin conversion accelerator


accelerator

 [ak-sel´er-a″ter] (L.) an agent or apparatus that increases the rate at which something occurs or progresses.serum prothrombin conversion accelerator (SPCA) factor VII, one of the coagulation factors.

se·rum pro·throm·bin con·ver·sion ac·cel·er·a·tor (SPCA),

obsolete term for factor VII.

factor VII

A coagulation factor that forms a complex with thromboplastin and calcium to activate factor X.

fac·tor VII

(fak'tŏr) A plasma factor in blood coagulation, forms a complex with tissue thromboplastin and calcium to activate factor X; accelerates the conversion of prothrombin to thrombin, in the presence of tissue thromboplastin, calcium, and factor V.
Synonym(s): cothromboplastin, proconvertin, serum accelerator, serum prothrombin conversion accelerator.

fac·tor VII

(fak'tŏr) In blood clotting, forms a complex with tissue thromboplastin and calcium to activate factor X.
Synonym(s): prothrombinogen.