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Where is there a good nomogram on dosing Vitamin K for high INR levels? I have cross cover in a couple of days, ...just need to know!! Thanks
Mumpu said:Some key points not mentioned in the card:
1) You MUST bridge with heparin for 5 days. Even if the INR is therapeutic on day 2 of therapy, the most enduring vitamin K-dependent coagulation factors persist for 5 days.
Adcadet said:This came up on my medicine sub-i, and my attending insisted that bridging therapy is not needed nor supported by evidence. At the time it was a minor point that I was too busy to track down beyond the NEJM review article that insisted on 5-day briding therapy as Mumpu describes (and I really didn't feel like going out of my way to tell her she was wrong). Does anyone have a good reference handy regarding the necessity of bridging therapy for when this comes up again?
goredsux said:...It depends on the indication for anticoagulation...
APACHE3 said:Where is there a good nomogram on dosing Vitamin K for high INR levels? I have cross cover in a couple of days, ...just need to know!! Thanks
Mumpu said:It's not just a Protein C and S issue. The most-enduring vitamin K-dependent coag factors take 5 days to go away. You can't do anything to reduce their half-lives, and the patient is not fully anti-coagulated until these factors clear. Whether it's clinically significant is another matter..