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Baby with a high INR

My son has been on warfarin since he was 7 weeks old due to having a mechanical Mitral valve replacement. His INR today is 4.8. The highest it's ever been.He is six months now and just starting solids which may be why the INR has been all over the place. I have been instructed to withhold his dose tonight and I'll test him again tomorrow. I've been doing some reading that INR of 4.8 is undesirable but not overly dangerous. Is that the case for babies as well? Should I be as worried as I am?
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Avatar universal
As someone who is on warfarin, I have the same impresson of an INR of 4.8 as you do -- that it is undesirable but not greatly alarming.  I have never heard that the INR is interpreted any differently for an infant than for an older person.  There are some "heart mom" forums on the internet for mothers of children with congenital heart disease.  I don't know where to direct you, but if you can find a forum such as that, this is a question that some of the other moms might know.  Also, obviously, it is something you can ask your son's doctor.  But as an adult on warfarin, I have never heard that a child or infant's INR means anything different than an adult's INR.  
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Avatar universal
MEDICAL PROFESSIONAL
Hello and hope you are doing well.

It is usually recommended to have an INR of 2.0 to 3.0 for basic "blood-thinning" needs. If the INR is higher - about 2.5 to 3.5, it means it is more thinner to prevent clotting. If lower it is thicker. So, if the INR is at 4.8, the chances of bleeding are more, keep monitoring and try to bring it under the normal range.

Hope this helped and do keep us posted.
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