Coagulation Levels Lab Values

Question 1

INR:
Not on warfarin:

< ?

Answer 1

INR:
Not on warfarin:

< 1

Question 2

INR
On warfarin:

? - ?

Answer 2

INR
On warfarin:

2-3

Question 3

aPTT (activated partial thromboplastin time):
Not on heparin

? - ? seconds

Answer 3

aPTT (activated partial thromboplastin time):
Not on heparin

30-40 seconds

Question 4

aPTT (activated partial thromboplastin time):
On heparin

? - ? times normal range

Answer 4

aPTT (activated partial thromboplastin time):
On heparin

1.5-2.5 times normal range