Spaw: glad to hear Karen's doing better, but don't rush the coumadin; it can be somewhat antsy to get right & better a small amount too much than a small amount too little (the statistics are surprising!). Yer doc's'll be talking about regulating it w/something called the "INR."
Na; it's got nuttin' ta do wit da TAX GUYS... It's the "International Normalization Ratio" - nominally a way of equalizing lab performance across various labs, so the numbers mean the same thing everywhere. They'll want it between 2.0 & 3.0; Above 3 is still quite ok for most people but 1.9 (or less) is not an ok number to stay at, period.
They'll also want her to be careful abt other meds & diet which might affect the fucntion (metabolism) of the coumadin (other name: Warfarin) & it may take many repeat blood tests & a lot of patience, so hang in there!
Were all rootin for you 'n Karen (& the boys)
Cheers, BK