I take 7.5mg of warfarin daily, my target INR is 2.5... last week I home tested and got a 7.9 reading... it took three test strips before I could get enough blood out to test in the time allowed. I then went to the local hospital to have it retested. It took the nurse three sticks before she could get enough, because it was so thick, she made the statement, your INR is more like a .7. However the lab result was a 8.3! This has happened before when it was in the 6 range. I have noticed that when my INR is below 2, that I have a hard time getting the test site to quit bleeding, and I bruise like crazy. I know that this it the complete opposite of the way it should work. I mentioned it to two doctors, and pretty much got blown off. Does anyone know what can cause this or what tests to ask for. I go into A-fib a lot, due to 30 tears with severe hypertrophic cardiomyopathy, and I really don't care to have another stroke.
It makes no sense I know. My Mom tells me the same thing happened when they wanted her on coumadin. The lab tech couldn't get enough because it would clot too fast. Have you seen a hematologist? My Mom said she's too old to worry about it, lol. She changed to plavix. The interesting thing is she also has a-fib from severe hypertrophic cardiomyopathy. Her platelets are low, which truly makes no sense with the clotting.
Please go to apsfa.org and read about problems with INR machine test strips. The manufacturers send out WARNINGS that the strips ARE NOT RELIABLE for testing APS. Nonetgekess, many practioners don't read the fine print/don't take it seriously. When I learned of this issue thru the associated Facebook group 'APS Friends and Family', I presented it to my primary doctor (who had been testing me via INR machine) and insisted on a referral to the hospital out patient 'Anticoagulation Clinic', where I figured they would have more upto date info about it. In fact, they had recently learned about it 'the hard way' and revamped their procedures. I happen to be pretty much in-sync with the INR strips vs. Vein blood Protime INR vs Factor II lab. But, we established that by several weeks of comparison and if my INR varies too much, we retest the other ways. Good luck.
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