For In Vitro Diagnostic Use. In EU: This Product is CE Marked. Health Canada Licensed Deficient plasma for the assay of Factor VII. All the clotting factors are present (constant and in the normal range, brought by the deficient plasma), except for FVII, which is brought by the diluted tested plasma, and clotting is triggered with calcium thromboplastin. FVII is the limiting factor and clotting time is inversely proportional to the concentration of FVII.