In a platelet poor plasma sample calcium and tissue thromboplastin is added. This is used to assess which of the following pathway?
Extrinsic
Intrinsic
Fibrinolytic
Common
Whenever we want to assess the Extrinsic or Intrinsic pathway, the sample that is taken is Platelet poor plasma sample. Assessment of EXTRINSIC PATHWAY - tissue thromboplastin is added along with calcium Intrinsic pathway - addition of Ca2+ along with negatively charged substance like Kaolin or Cephalin.