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anticoagulation

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Question
Answer
clotting factors inhibited by warfarin   II, VII, IX, X and protein C and S (anticoagulants)  
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half life of factor II   72 hours  
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half life of factor VII   6 hours  
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half life of factor IX   24 hours  
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half life of factor X   36 hours  
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in acute VTE, how long should you overlap warfarin and LMWH. why is this overlap necessary   5 days and INR 2+ for 24 hours. do this in order to fully suppress factor II. if not, will have suppressed protein C and S which act as anticoagulants but still have clotting from factor II which leads to a hypercoagulable state.  
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gene mutations associated with warfarin and what they alter   VKORCI - alters warfarin sensitivity 2C9 - alters half life and metabolism  
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warfarin pregnancy category and breastfeeding   preggers category X and ok with breastfeeding  
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