Lab
Tests & Congenital Risk Factors
Prothrombin Time (PT)
Screening tests:
To rule out oral
anticoagulant
If prolonged it may be
due to:
Liver disease
Kidney disease
Vitamin K deficiency
Chronic inflammation
Factor VII deficiency
Activated Partial Thromboplastin
Time (aPTT):
To rule out:
Lupus anticoagulant
Heparin therapy
Intrinsic pathway factor
deficiencies
Shortened aPTT time due
to:
Increased I or VIII in inflammation
