***INR Flashcards
1
Q
What are the two types of INR tests?
A
pTT
PT
measures how long it takes for blood to clot. High number = bad because blood is taking too long to clot
2
Q
What does the pT measure?
A
Measures extrinsic pathway (short)
- Factors 2, 5, 10
- Factor 7
- Fibrinogen
3
Q
What does the pTT measure?
A
Measures intrinsic pathway (long).
- Factors 2, 5, 10
- Factors 8, 9, 11 or 12
4
Q
- Prolonged PT
* Normal PTT/ INR
A
- Liver disease
- Low Vit K
- Defective factor 7
- Warfarin therapy
5
Q
- Normal PT
* Prolonged PTT
A
- Defective factor 8, 9, 11, or 12
* VwF disease
6
Q
What does a prolonged PT and prolonged PTT mean?
A
- Defective factor 2, 5 or 10
- Severe liver disease
- Warfarin overdose
