I am going to take the NCLEX this coming Monday and I am still very confuse about the PTT & PT level.
This is what I know:
PTT is used with heparin therapy. norm PTT is 20-45 sec and if you are on heparin the theraputic level should be 1.5-2.5 times 20-45 sec that means it takes longer time to have blood to clot.
PT is used with Coumadin therapy. Norm is around 9.6-12 sec and if you are taking Coumadin, the theraputic level should be 1.5-2.5 times 9.6-12 sec?
Am I right? How come different books said different NORM?
Then what about INR? is it always used with Coumadin and heparin therapy?
Is the Norm for INR 2-3 when you are on blood thinner? Or is 2-3 Norm for normal person without the blood thinner.
Sorry that this is a dumb question but this is all I have learned about PTT & PT from my nursing school