Table 1 lists the 13 coagulation factors and their names. Memorizing every factor has little utility, but having the chart as a reference is useful, as clinicians may use a name or a factor number when they call the laboratory.
Table 1. Coagulation Factors.| Factor | Name |
| I | Fibrinogen |
| II | Prothrombin |
| III | Tissue Factor (Tissue Thromboplastin)* |
| IV | Calcium* |
| V | Proaccelerin (labile factor) |
| VI | This factor is no longer used |
| VII | Proconvertin (stable factor) |
| VIII | Antihemophilic factor A |
| IX | Plasma thromboplastin component (Antihemophilic factor B or Christmas factor) |
| X | Stuart-Prower factor |
| XI | Plasma thromboplastin antecedent |
| XII | Hageman factor |
| XIII | Fibrin stabilizing factor |
*Not made in the liver.
