Coagulation and chromogenic assays
of factor VIII activity: general aspects, standardization, and recommendations.
The detection of chromogenic assay
is based on the absorbance (optical density O.
4 s (reference interval, 23-36 s), and factor VIII activity was markedly reduced in a chromogenic assay
(<10 IU/dL; reference interval, 50-175 IU/dL) and a clotting assay (<1 IU/dL; reference interval, 70-150 IU/dL).
Quantitative assessment of dabigatran levels can be obtained with the dilute thrombin time (dTT), the ecarin clotting time, or the ecarin chromogenic assay
4) More recently, this disadvantage has been overcome by development of the ecarin chromogenic assay
(ECA) which has been described as a simple, rapid, precise, reliable, and specific method for the quantitative determination of DTIs.
The Olympus serum total bilirubin assay is an end-point chromogenic assay