Coagulation Testing Flashcards
1
Q
Activated Clotting Time (ACT)
A
Measures the amount of time required for whole blood to clot in a test tube
Used a lot in cardiac surgery
Used to monitor heparin therapy in the OR
Normal – 70-180 seconds
Sufficient for CPB – > 400 seconds
Cardiopulmonary bypass
2
Q
Prothrombin Time (PT)
A
Normal 10-14s or 30-40s (depending on reagent used)
High means the patient is more likely to bleed (not clotting quickly)
PT test varies in sensitivity among laboratories
3
Q
Partial Thromboplastin Time (PTT)
A
Normal 25-38s
Can be used to monitor anticoagulation therapy
4
Q
International Normalized Ratio (INR)
A
developed to standardize PT values to better monitor oral anticoagulation therapy
