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What is Prologed PT and Normal PTT may be seen in - and explain in detail?
PT measures extrinsic system and common pathway APTT measures intrinsic and common pathway In thrombocytopenia , coagulation pathway is not affected. So no change in PT , APTT In DIC and vit k deficiency both PT and APTT are prolonged Reference : Harsh Mohan textbook of pathology, 7th edition.Pg no.314,317