bleeding time;-it is the time interval between the onset of blood flow from the injured part till the stoppage of bleeding / spontaneous stoppage of bleeding
normal bleeding time---2-4 min
clotting time -it is the time interval between the onset of blood flow from the injured part till the appearance /formation of fibrin thread
normal clotting time - 3-8 min
disorders :-
hemophilia viii
hemophilia ix
sex linked disorder -females are the carriers and males are affected by it. due to cris -cross inheritance
clotting time increases upto 120 min bleeding time remains normal
-thrombocytopenia: platelet count reduces bt time increases ct time remains normal
thrombocytopenia purpura-purpuric spot on the skin appear due to subcutaneous bleeding because of fragile capillaries
von willbrand disease:-absence of vonwillbrand factor
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